Commit Graph

52675 Commits

Author SHA1 Message Date
Linus Torvalds
0a78ac4b9b The main things are support for cephx v2 authentication protocol and
basic support for rbd images within namespaces (myself).  Also included
 y2038 conversion patches from Arnd, a pile of miscellaneous fixes from
 Chengguang and Zheng's feature bit infrastructure for the filesystem.
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Merge tag 'ceph-for-4.19-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "The main things are support for cephx v2 authentication protocol and
  basic support for rbd images within namespaces (myself).

  Also included are y2038 conversion patches from Arnd, a pile of
  miscellaneous fixes from Chengguang and Zheng's feature bit
  infrastructure for the filesystem"

* tag 'ceph-for-4.19-rc1' of git://github.com/ceph/ceph-client: (40 commits)
  ceph: don't drop message if it contains more data than expected
  ceph: support cephfs' own feature bits
  crush: fix using plain integer as NULL warning
  libceph: remove unnecessary non NULL check for request_key
  ceph: refactor error handling code in ceph_reserve_caps()
  ceph: refactor ceph_unreserve_caps()
  ceph: change to void return type for __do_request()
  ceph: compare fsc->max_file_size and inode->i_size for max file size limit
  ceph: add additional size check in ceph_setattr()
  ceph: add additional offset check in ceph_write_iter()
  ceph: add additional range check in ceph_fallocate()
  ceph: add new field max_file_size in ceph_fs_client
  libceph: weaken sizeof check in ceph_x_verify_authorizer_reply()
  libceph: check authorizer reply/challenge length before reading
  libceph: implement CEPHX_V2 calculation mode
  libceph: add authorizer challenge
  libceph: factor out encrypt_authorizer()
  libceph: factor out __ceph_x_decrypt()
  libceph: factor out __prepare_write_connect()
  libceph: store ceph_auth_handshake pointer in ceph_connection
  ...
2018-08-20 18:26:55 -07:00
Linus Torvalds
2ad0d52699 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix races in IPVS, from Tan Hu.

 2) Missing unbind in matchall classifier, from Hangbin Liu.

 3) Missing act_ife action release, from Vlad Buslov.

 4) Cure lockdep splats in ila, from Cong Wang.

 5) veth queue leak on link delete, from Toshiaki Makita.

 6) Disable isdn's IIOCDBGVAR ioctl, it exposes kernel addresses. From
    Kees Cook.

 7) RCU usage fixup in XDP, from Tariq Toukan.

 8) Two TCP ULP fixes from Daniel Borkmann.

 9) r8169 needs REALTEK_PHY as a Kconfig dependency, from Heiner
    Kallweit.

10) Always take tcf_lock with BH disabled, otherwise we can deadlock
    with rate estimator code paths. From Vlad Buslov.

11) Don't use MSI-X on RTL8106e r8169 chips, they don't resume properly.
    From Jian-Hong Pan.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits)
  ip6_vti: fix creating fallback tunnel device for vti6
  ip_vti: fix a null pointer deferrence when create vti fallback tunnel
  r8169: don't use MSI-X on RTL8106e
  net: lan743x_ptp: convert to ktime_get_clocktai_ts64
  net: sched: always disable bh when taking tcf_lock
  ip6_vti: simplify stats handling in vti6_xmit
  bpf: fix redirect to map under tail calls
  r8169: add missing Kconfig dependency
  tools/bpf: fix bpf selftest test_cgroup_storage failure
  bpf, sockmap: fix sock_map_ctx_update_elem race with exist/noexist
  bpf, sockmap: fix map elem deletion race with smap_stop_sock
  bpf, sockmap: fix leakage of smap_psock_map_entry
  tcp, ulp: fix leftover icsk_ulp_ops preventing sock from reattach
  tcp, ulp: add alias for all ulp modules
  bpf: fix a rcu usage warning in bpf_prog_array_copy_core()
  samples/bpf: all XDP samples should unload xdp/bpf prog on SIGTERM
  net/xdp: Fix suspicious RCU usage warning
  net/mlx5e: Delete unneeded function argument
  Documentation: networking: ti-cpsw: correct cbs parameters for Eth1 100Mb
  isdn: Disable IIOCDBGVAR
  ...
2018-08-19 11:51:45 -07:00
Haishuang Yan
e2948e5af8 ip6_vti: fix creating fallback tunnel device for vti6
When set fb_tunnels_only_for_init_net to 1, don't create fallback tunnel
device for vti6 when a new namespace is created.

Tested:
[root@builder2 ~]# modprobe ip6_tunnel
[root@builder2 ~]# modprobe ip6_vti
[root@builder2 ~]# echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net
[root@builder2 ~]# unshare -n
[root@builder2 ~]# ip link
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group
default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19 11:26:39 -07:00
Haishuang Yan
cd1aa9c2c6 ip_vti: fix a null pointer deferrence when create vti fallback tunnel
After set fb_tunnels_only_for_init_net to 1, the itn->fb_tunnel_dev will
be NULL and will cause following crash:

[ 2742.849298] BUG: unable to handle kernel NULL pointer dereference at 0000000000000941
[ 2742.851380] PGD 800000042c21a067 P4D 800000042c21a067 PUD 42aaed067 PMD 0
[ 2742.852818] Oops: 0002 [#1] SMP PTI
[ 2742.853570] CPU: 7 PID: 2484 Comm: unshare Kdump: loaded Not tainted 4.18.0-rc8+ #2
[ 2742.855163] Hardware name: Fedora Project OpenStack Nova, BIOS seabios-1.7.5-11.el7 04/01/2014
[ 2742.856970] RIP: 0010:vti_init_net+0x3a/0x50 [ip_vti]
[ 2742.858034] Code: 90 83 c0 48 c7 c2 20 a1 83 c0 48 89 fb e8 6e 3b f6 ff 85 c0 75 22 8b 0d f4 19 00 00 48 8b 93 00 14 00 00 48 8b 14 ca 48 8b 12 <c6> 82 41 09 00 00 04 c6 82 38 09 00 00 45 5b c3 66 0f 1f 44 00 00
[ 2742.861940] RSP: 0018:ffff9be28207fde0 EFLAGS: 00010246
[ 2742.863044] RAX: 0000000000000000 RBX: ffff8a71ebed4980 RCX: 0000000000000013
[ 2742.864540] RDX: 0000000000000000 RSI: 0000000000000013 RDI: ffff8a71ebed4980
[ 2742.866020] RBP: ffff8a71ea717000 R08: ffffffffc083903c R09: ffff8a71ea717000
[ 2742.867505] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a71ebed4980
[ 2742.868987] R13: 0000000000000013 R14: ffff8a71ea5b49c0 R15: 0000000000000000
[ 2742.870473] FS:  00007f02266c9740(0000) GS:ffff8a71ffdc0000(0000) knlGS:0000000000000000
[ 2742.872143] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2742.873340] CR2: 0000000000000941 CR3: 000000042bc20006 CR4: 00000000001606e0
[ 2742.874821] Call Trace:
[ 2742.875358]  ops_init+0x38/0xf0
[ 2742.876078]  setup_net+0xd9/0x1f0
[ 2742.876789]  copy_net_ns+0xb7/0x130
[ 2742.877538]  create_new_namespaces+0x11a/0x1d0
[ 2742.878525]  unshare_nsproxy_namespaces+0x55/0xa0
[ 2742.879526]  ksys_unshare+0x1a7/0x330
[ 2742.880313]  __x64_sys_unshare+0xe/0x20
[ 2742.881131]  do_syscall_64+0x5b/0x180
[ 2742.881933]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reproduce:
echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net
modprobe ip_vti
unshare -n

Fixes: 79134e6ce2 ("net: do not create fallback tunnels for non-default namespaces")
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19 11:26:39 -07:00
Vlad Buslov
653cd284a8 net: sched: always disable bh when taking tcf_lock
Recently, ops->init() and ops->dump() of all actions were modified to
always obtain tcf_lock when accessing private action state. Actions that
don't depend on tcf_lock for synchronization with their data path use
non-bh locking API. However, tcf_lock is also used to protect rate
estimator stats in softirq context by timer callback.

Change ops->init() and ops->dump() of all actions to disable bh when using
tcf_lock to prevent deadlock reported by following lockdep warning:

[  105.470398] ================================
[  105.475014] WARNING: inconsistent lock state
[  105.479628] 4.18.0-rc8+ #664 Not tainted
[  105.483897] --------------------------------
[  105.488511] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[  105.494871] swapper/16/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
[  105.500449] 00000000f86c012e (&(&p->tcfa_lock)->rlock){+.?.}, at: est_fetch_counters+0x3c/0xa0
[  105.509696] {SOFTIRQ-ON-W} state was registered at:
[  105.514925]   _raw_spin_lock+0x2c/0x40
[  105.519022]   tcf_bpf_init+0x579/0x820 [act_bpf]
[  105.523990]   tcf_action_init_1+0x4e4/0x660
[  105.528518]   tcf_action_init+0x1ce/0x2d0
[  105.532880]   tcf_exts_validate+0x1d8/0x200
[  105.537416]   fl_change+0x55a/0x268b [cls_flower]
[  105.542469]   tc_new_tfilter+0x748/0xa20
[  105.546738]   rtnetlink_rcv_msg+0x56a/0x6d0
[  105.551268]   netlink_rcv_skb+0x18d/0x200
[  105.555628]   netlink_unicast+0x2d0/0x370
[  105.559990]   netlink_sendmsg+0x3b9/0x6a0
[  105.564349]   sock_sendmsg+0x6b/0x80
[  105.568271]   ___sys_sendmsg+0x4a1/0x520
[  105.572547]   __sys_sendmsg+0xd7/0x150
[  105.576655]   do_syscall_64+0x72/0x2c0
[  105.580757]   entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  105.586243] irq event stamp: 489296
[  105.590084] hardirqs last  enabled at (489296): [<ffffffffb507e639>] _raw_spin_unlock_irq+0x29/0x40
[  105.599765] hardirqs last disabled at (489295): [<ffffffffb507e745>] _raw_spin_lock_irq+0x15/0x50
[  105.609277] softirqs last  enabled at (489292): [<ffffffffb413a6a3>] irq_enter+0x83/0xa0
[  105.618001] softirqs last disabled at (489293): [<ffffffffb413a800>] irq_exit+0x140/0x190
[  105.626813]
               other info that might help us debug this:
[  105.633976]  Possible unsafe locking scenario:

[  105.640526]        CPU0
[  105.643325]        ----
[  105.646125]   lock(&(&p->tcfa_lock)->rlock);
[  105.650747]   <Interrupt>
[  105.653717]     lock(&(&p->tcfa_lock)->rlock);
[  105.658514]
                *** DEADLOCK ***

[  105.665349] 1 lock held by swapper/16/0:
[  105.669629]  #0: 00000000a640ad99 ((&est->timer)){+.-.}, at: call_timer_fn+0x10b/0x550
[  105.678200]
               stack backtrace:
[  105.683194] CPU: 16 PID: 0 Comm: swapper/16 Not tainted 4.18.0-rc8+ #664
[  105.690249] Hardware name: Supermicro SYS-2028TP-DECR/X10DRT-P, BIOS 2.0b 03/30/2017
[  105.698626] Call Trace:
[  105.701421]  <IRQ>
[  105.703791]  dump_stack+0x92/0xeb
[  105.707461]  print_usage_bug+0x336/0x34c
[  105.711744]  mark_lock+0x7c9/0x980
[  105.715500]  ? print_shortest_lock_dependencies+0x2e0/0x2e0
[  105.721424]  ? check_usage_forwards+0x230/0x230
[  105.726315]  __lock_acquire+0x923/0x26f0
[  105.730597]  ? debug_show_all_locks+0x240/0x240
[  105.735478]  ? mark_lock+0x493/0x980
[  105.739412]  ? check_chain_key+0x140/0x1f0
[  105.743861]  ? __lock_acquire+0x836/0x26f0
[  105.748323]  ? lock_acquire+0x12e/0x290
[  105.752516]  lock_acquire+0x12e/0x290
[  105.756539]  ? est_fetch_counters+0x3c/0xa0
[  105.761084]  _raw_spin_lock+0x2c/0x40
[  105.765099]  ? est_fetch_counters+0x3c/0xa0
[  105.769633]  est_fetch_counters+0x3c/0xa0
[  105.773995]  est_timer+0x87/0x390
[  105.777670]  ? est_fetch_counters+0xa0/0xa0
[  105.782210]  ? lock_acquire+0x12e/0x290
[  105.786410]  call_timer_fn+0x161/0x550
[  105.790512]  ? est_fetch_counters+0xa0/0xa0
[  105.795055]  ? del_timer_sync+0xd0/0xd0
[  105.799249]  ? __lock_is_held+0x93/0x110
[  105.803531]  ? mark_held_locks+0x20/0xe0
[  105.807813]  ? _raw_spin_unlock_irq+0x29/0x40
[  105.812525]  ? est_fetch_counters+0xa0/0xa0
[  105.817069]  ? est_fetch_counters+0xa0/0xa0
[  105.821610]  run_timer_softirq+0x3c4/0x9f0
[  105.826064]  ? lock_acquire+0x12e/0x290
[  105.830257]  ? __bpf_trace_timer_class+0x10/0x10
[  105.835237]  ? __lock_is_held+0x25/0x110
[  105.839517]  __do_softirq+0x11d/0x7bf
[  105.843542]  irq_exit+0x140/0x190
[  105.847208]  smp_apic_timer_interrupt+0xac/0x3b0
[  105.852182]  apic_timer_interrupt+0xf/0x20
[  105.856628]  </IRQ>
[  105.859081] RIP: 0010:cpuidle_enter_state+0xd8/0x4d0
[  105.864395] Code: 46 ff 48 89 44 24 08 0f 1f 44 00 00 31 ff e8 cf ec 46 ff 80 7c 24 07 00 0f 85 1d 02 00 00 e8 9f 90 4b ff fb 66 0f 1f 44 00 00 <4c> 8b 6c 24 08 4d 29 fd 0f 80 36 03 00 00 4c 89 e8 48 ba cf f7 53
[  105.884288] RSP: 0018:ffff8803ad94fd20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[  105.892494] RAX: 0000000000000000 RBX: ffffe8fb300829c0 RCX: ffffffffb41e19e1
[  105.899988] RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8803ad9358ac
[  105.907503] RBP: ffffffffb6636300 R08: 0000000000000004 R09: 0000000000000000
[  105.914997] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[  105.922487] R13: ffffffffb6636140 R14: ffffffffb66362d8 R15: 000000188d36091b
[  105.929988]  ? trace_hardirqs_on_caller+0x141/0x2d0
[  105.935232]  do_idle+0x28e/0x320
[  105.938817]  ? arch_cpu_idle_exit+0x40/0x40
[  105.943361]  ? mark_lock+0x8c1/0x980
[  105.947295]  ? _raw_spin_unlock_irqrestore+0x32/0x60
[  105.952619]  cpu_startup_entry+0xc2/0xd0
[  105.956900]  ? cpu_in_idle+0x20/0x20
[  105.960830]  ? _raw_spin_unlock_irqrestore+0x32/0x60
[  105.966146]  ? trace_hardirqs_on_caller+0x141/0x2d0
[  105.971391]  start_secondary+0x2b5/0x360
[  105.975669]  ? set_cpu_sibling_map+0x1330/0x1330
[  105.980654]  secondary_startup_64+0xa5/0xb0

Taking tcf_lock in sample action with bh disabled causes lockdep to issue a
warning regarding possible irq lock inversion dependency between tcf_lock,
and psample_groups_lock that is taken when holding tcf_lock in sample init:

[  162.108959]  Possible interrupt unsafe locking scenario:

[  162.116386]        CPU0                    CPU1
[  162.121277]        ----                    ----
[  162.126162]   lock(psample_groups_lock);
[  162.130447]                                local_irq_disable();
[  162.136772]                                lock(&(&p->tcfa_lock)->rlock);
[  162.143957]                                lock(psample_groups_lock);
[  162.150813]   <Interrupt>
[  162.153808]     lock(&(&p->tcfa_lock)->rlock);
[  162.158608]
                *** DEADLOCK ***

In order to prevent potential lock inversion dependency between tcf_lock
and psample_groups_lock, extract call to psample_group_get() from tcf_lock
protected section in sample action init function.

Fixes: 4e232818bd ("net: sched: act_mirred: remove dependency on rtnl lock")
Fixes: 764e9a2448 ("net: sched: act_vlan: remove dependency on rtnl lock")
Fixes: 729e012609 ("net: sched: act_tunnel_key: remove dependency on rtnl lock")
Fixes: d772849566 ("net: sched: act_sample: remove dependency on rtnl lock")
Fixes: e8917f4370 ("net: sched: act_gact: remove dependency on rtnl lock")
Fixes: b6a2b971c0 ("net: sched: act_csum: remove dependency on rtnl lock")
Fixes: 2142236b45 ("net: sched: act_bpf: remove dependency on rtnl lock")
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19 10:46:21 -07:00
Haishuang Yan
bb107456ba ip6_vti: simplify stats handling in vti6_xmit
Same as ip_vti, use iptunnel_xmit_stats to updates stats in tunnel xmit
code path.

Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-18 13:46:54 -07:00
David S. Miller
6e3bf9b04f Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:

====================
pull-request: bpf 2018-08-18

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) Fix a BPF selftest failure in test_cgroup_storage due to rlimit
   restrictions, from Yonghong.

2) Fix a suspicious RCU rcu_dereference_check() warning triggered
   from removing a device's XDP memory allocator by using the correct
   rhashtable lookup function, from Tariq.

3) A batch of BPF sockmap and ULP fixes mainly fixing leaks and races
   as well as enforcing module aliases for ULPs. Another fix for BPF
   map redirect to make them work again with tail calls, from Daniel.

4) Fix XDP BPF samples to unload their programs upon SIGTERM, from Jesper.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-18 10:02:49 -07:00
David S. Miller
3fe49d699a Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
Pablo Neira Ayuso says:

====================
Netfilter/IPVS fixes for net

The following patchset contains Netfilter/IPVS fixes for your net tree:

1) Infinite loop in IPVS when net namespace is released, from
   Tan Hu.

2) Do not show negative timeouts in ip_vs_conn by using the new
   jiffies_delta_to_msecs(), patches from Matteo Croce.

3) Set F_IFACE flag for linklocal addresses in ip6t_rpfilter,
   from Florian Westphal.

4) Fix overflow in set size allocation, from Taehee Yoo.

5) Use netlink_dump_start() from ctnetlink to fix memleak from
   the error path, again from Florian.

6) Register nfnetlink_subsys in last place, otherwise netns
   init path may lose race and see net->nft uninitialized data.
   This also reverts previous attempt to fix this by increase
   netns refcount, patches from Florian.

7) Remove conntrack entries on layer 4 protocol tracker module
   removal, from Florian.

8) Use GFP_KERNEL_ACCOUNT for xtables blob allocation, from
   Michal Hocko.

9) Get tproxy documentation in sync with existing codebase,
   from Mate Eckl.

10) Honor preset layer 3 protocol via ctx->family in the new nft_ct
    timeout infrastructure, from Harsha Sharma.

11) Let uapi nfnetlink_osf.h compile standalone with no errors,
    from Dmitry V. Levin.

12) Missing braces compilation warning in nft_tproxy, patch from
    Mate Eclk.

13) Disregard bogus check to bail out on non-anonymous sets from
    the dynamic set update extension.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-18 09:59:19 -07:00
Linus Torvalds
1f7a4c73a7 Pull request for inclusion in 4.19, take two
This tag is the same as 9p-for-4.19 without the two MAINTAINERS patches
 
 Contains mostly fixes (6 to be backported to stable) and a few changes,
 here is the breakdown:
  * Rework how fids are attributed by replacing some custom tracking in a
 list by an idr (f28cdf0430)
  * For packet-based transports (virtio/rdma) validate that the packet
 length matches what the header says (f984579a01)
  * A few race condition fixes found by syzkaller (9f476d7c54,
 430ac66eb4)
  * Missing argument check when NULL device is passed in sys_mount
 (10aa14527f)
  * A few virtio fixes (23cba9cbde, 31934da810, d28c756cae)
  * Some spelling and style fixes
 
 ----------------------------------------------------------------
 Chirantan Ekbote (1):
       9p/net: Fix zero-copy path in the 9p virtio transport
 
 Colin Ian King (1):
       fs/9p/v9fs.c: fix spelling mistake "Uknown" -> "Unknown"
 
 Jean-Philippe Brucker (1):
       net/9p: fix error path of p9_virtio_probe
 
 Matthew Wilcox (4):
       9p: Fix comment on smp_wmb
       9p: Change p9_fid_create calling convention
       9p: Replace the fidlist with an IDR
       9p: Embed wait_queue_head into p9_req_t
 
 Souptick Joarder (1):
       fs/9p/vfs_file.c: use new return type vm_fault_t
 
 Stephen Hemminger (1):
       9p: fix whitespace issues
 
 Tomas Bortoli (5):
       net/9p/client.c: version pointer uninitialized
       net/9p/trans_fd.c: fix race-condition by flushing workqueue before the kfree()
       net/9p/trans_fd.c: fix race by holding the lock
       9p: validate PDU length
       9p: fix multiple NULL-pointer-dereferences
 
 jiangyiwen (2):
       net/9p/virtio: Fix hard lockup in req_done
       9p/virtio: fix off-by-one error in sg list bounds check
 
 piaojun (5):
       net/9p/client.c: add missing '\n' at the end of p9_debug()
       9p/net/protocol.c: return -ENOMEM when kmalloc() failed
       net/9p/trans_virtio.c: fix some spell mistakes in comments
       fs/9p/xattr.c: catch the error of p9_client_clunk when setting xattr failed
       net/9p/trans_virtio.c: add null terminal for mount tag
 
  fs/9p/v9fs.c            |   2 +-
  fs/9p/vfs_file.c        |   2 +-
  fs/9p/xattr.c           |   6 ++++--
  include/net/9p/client.h |  11 ++++-------
  net/9p/client.c         | 119 +++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------------------------------
  net/9p/protocol.c       |   2 +-
  net/9p/trans_fd.c       |  22 +++++++++++++++-------
  net/9p/trans_rdma.c     |   4 ++++
  net/9p/trans_virtio.c   |  66 +++++++++++++++++++++++++++++++++++++---------------------------
  net/9p/trans_xen.c      |   3 +++
  net/9p/util.c           |   1 -
  12 files changed, 122 insertions(+), 116 deletions(-)
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 -----END PGP SIGNATURE-----

Merge tag '9p-for-4.19-2' of git://github.com/martinetd/linux

Pull 9p updates from Dominique Martinet:
 "This contains mostly fixes (6 to be backported to stable) and a few
  changes, here is the breakdown:

   - rework how fids are attributed by replacing some custom tracking in
     a list by an idr

   - for packet-based transports (virtio/rdma) validate that the packet
     length matches what the header says

   - a few race condition fixes found by syzkaller

   - missing argument check when NULL device is passed in sys_mount

   - a few virtio fixes

   - some spelling and style fixes"

* tag '9p-for-4.19-2' of git://github.com/martinetd/linux: (21 commits)
  net/9p/trans_virtio.c: add null terminal for mount tag
  9p/virtio: fix off-by-one error in sg list bounds check
  9p: fix whitespace issues
  9p: fix multiple NULL-pointer-dereferences
  fs/9p/xattr.c: catch the error of p9_client_clunk when setting xattr failed
  9p: validate PDU length
  net/9p/trans_fd.c: fix race by holding the lock
  net/9p/trans_fd.c: fix race-condition by flushing workqueue before the kfree()
  net/9p/virtio: Fix hard lockup in req_done
  net/9p/trans_virtio.c: fix some spell mistakes in comments
  9p/net: Fix zero-copy path in the 9p virtio transport
  9p: Embed wait_queue_head into p9_req_t
  9p: Replace the fidlist with an IDR
  9p: Change p9_fid_create calling convention
  9p: Fix comment on smp_wmb
  net/9p/client.c: version pointer uninitialized
  fs/9p/v9fs.c: fix spelling mistake "Uknown" -> "Unknown"
  net/9p: fix error path of p9_virtio_probe
  9p/net/protocol.c: return -ENOMEM when kmalloc() failed
  net/9p/client.c: add missing '\n' at the end of p9_debug()
  ...
2018-08-17 17:27:58 -07:00
Daniel Borkmann
f6069b9aa9 bpf: fix redirect to map under tail calls
Commits 109980b894 ("bpf: don't select potentially stale ri->map
from buggy xdp progs") and 7c30013133 ("bpf: fix ri->map_owner
pointer on bpf_prog_realloc") tried to mitigate that buggy programs
using bpf_redirect_map() helper call do not leave stale maps behind.
Idea was to add a map_owner cookie into the per CPU struct redirect_info
which was set to prog->aux by the prog making the helper call as a
proof that the map is not stale since the prog is implicitly holding
a reference to it. This owner cookie could later on get compared with
the program calling into BPF whether they match and therefore the
redirect could proceed with processing the map safely.

In (obvious) hindsight, this approach breaks down when tail calls are
involved since the original caller's prog->aux pointer does not have
to match the one from one of the progs out of the tail call chain,
and therefore the xdp buffer will be dropped instead of redirected.
A way around that would be to fix the issue differently (which also
allows to remove related work in fast path at the same time): once
the life-time of a redirect map has come to its end we use it's map
free callback where we need to wait on synchronize_rcu() for current
outstanding xdp buffers and remove such a map pointer from the
redirect info if found to be present. At that time no program is
using this map anymore so we simply invalidate the map pointers to
NULL iff they previously pointed to that instance while making sure
that the redirect path only reads out the map once.

Fixes: 97f91a7cf0 ("bpf: add bpf_redirect_map helper routine")
Fixes: 109980b894 ("bpf: don't select potentially stale ri->map from buggy xdp progs")
Reported-by: Sebastiano Miano <sebastiano.miano@polito.it>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-08-17 15:56:23 -07:00
Daniel Borkmann
90545cdc3f tcp, ulp: fix leftover icsk_ulp_ops preventing sock from reattach
I found that in BPF sockmap programs once we either delete a socket
from the map or we updated a map slot and the old socket was purged
from the map that these socket can never get reattached into a map
even though their related psock has been dropped entirely at that
point.

Reason is that tcp_cleanup_ulp() leaves the old icsk->icsk_ulp_ops
intact, so that on the next tcp_set_ulp_id() the kernel returns an
-EEXIST thinking there is still some active ULP attached.

BPF sockmap is the only one that has this issue as the other user,
kTLS, only calls tcp_cleanup_ulp() from tcp_v4_destroy_sock() whereas
sockmap semantics allow dropping the socket from the map with all
related psock state being cleaned up.

Fixes: 1aa12bdf1b ("bpf: sockmap, add sock close() hook to remove socks")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-08-16 14:58:08 -07:00
Daniel Borkmann
037b0b86ec tcp, ulp: add alias for all ulp modules
Lets not turn the TCP ULP lookup into an arbitrary module loader as
we only intend to load ULP modules through this mechanism, not other
unrelated kernel modules:

  [root@bar]# cat foo.c
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <linux/tcp.h>
  #include <linux/in.h>

  int main(void)
  {
      int sock = socket(PF_INET, SOCK_STREAM, 0);
      setsockopt(sock, IPPROTO_TCP, TCP_ULP, "sctp", sizeof("sctp"));
      return 0;
  }

  [root@bar]# gcc foo.c -O2 -Wall
  [root@bar]# lsmod | grep sctp
  [root@bar]# ./a.out
  [root@bar]# lsmod | grep sctp
  sctp                 1077248  4
  libcrc32c              16384  3 nf_conntrack,nf_nat,sctp
  [root@bar]#

Fix it by adding module alias to TCP ULP modules, so probing module
via request_module() will be limited to tcp-ulp-[name]. The existing
modules like kTLS will load fine given tcp-ulp-tls alias, but others
will fail to load:

  [root@bar]# lsmod | grep sctp
  [root@bar]# ./a.out
  [root@bar]# lsmod | grep sctp
  [root@bar]#

Sockmap is not affected from this since it's either built-in or not.

Fixes: 734942cc4e ("tcp: ULP infrastructure")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-08-16 14:58:07 -07:00
Jason Gunthorpe
0a3173a5f0 Merge branch 'linus/master' into rdma.git for-next
rdma.git merge resolution for the 4.19 merge window

Conflicts:
 drivers/infiniband/core/rdma_core.c
   - Use the rdma code and revise with the new spelling for
     atomic_fetch_add_unless
 drivers/nvme/host/rdma.c
   - Replace max_sge with max_send_sge in new blk code
 drivers/nvme/target/rdma.c
   - Use the blk code and revise to use NULL for ib_post_recv when
     appropriate
   - Replace max_sge with max_recv_sge in new blk code
 net/rds/ib_send.c
   - Use the net code and revise to use NULL for ib_post_recv when
     appropriate

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-08-16 14:21:29 -06:00
Jason Gunthorpe
92f4e77c85 Revert "net/smc: Replace ib_query_gid with rdma_get_gid_attr"
This reverts commit ddb457c699.

The include rdma/ib_cache.h is kept, and we have to add a memset
to the compat wrapper to avoid compiler warnings in gcc-7

This revert is done to avoid extensive merge conflicts with SMC
changes in netdev during the 4.19 merge window.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-08-16 14:03:34 -06:00
Tariq Toukan
21b172ee11 net/xdp: Fix suspicious RCU usage warning
Fix the warning below by calling rhashtable_lookup_fast.
Also, make some code movements for better quality and human
readability.

[  342.450870] WARNING: suspicious RCU usage
[  342.455856] 4.18.0-rc2+ #17 Tainted: G           O
[  342.462210] -----------------------------
[  342.467202] ./include/linux/rhashtable.h:481 suspicious rcu_dereference_check() usage!
[  342.476568]
[  342.476568] other info that might help us debug this:
[  342.476568]
[  342.486978]
[  342.486978] rcu_scheduler_active = 2, debug_locks = 1
[  342.495211] 4 locks held by modprobe/3934:
[  342.500265]  #0: 00000000e23116b2 (mlx5_intf_mutex){+.+.}, at:
mlx5_unregister_interface+0x18/0x90 [mlx5_core]
[  342.511953]  #1: 00000000ca16db96 (rtnl_mutex){+.+.}, at: unregister_netdev+0xe/0x20
[  342.521109]  #2: 00000000a46e2c4b (&priv->state_lock){+.+.}, at: mlx5e_close+0x29/0x60
[mlx5_core]
[  342.531642]  #3: 0000000060c5bde3 (mem_id_lock){+.+.}, at: xdp_rxq_info_unreg+0x93/0x6b0
[  342.541206]
[  342.541206] stack backtrace:
[  342.547075] CPU: 12 PID: 3934 Comm: modprobe Tainted: G           O      4.18.0-rc2+ #17
[  342.556621] Hardware name: Dell Inc. PowerEdge R730/0H21J3, BIOS 1.5.4 10/002/2015
[  342.565606] Call Trace:
[  342.568861]  dump_stack+0x78/0xb3
[  342.573086]  xdp_rxq_info_unreg+0x3f5/0x6b0
[  342.578285]  ? __call_rcu+0x220/0x300
[  342.582911]  mlx5e_free_rq+0x38/0xc0 [mlx5_core]
[  342.588602]  mlx5e_close_channel+0x20/0x120 [mlx5_core]
[  342.594976]  mlx5e_close_channels+0x26/0x40 [mlx5_core]
[  342.601345]  mlx5e_close_locked+0x44/0x50 [mlx5_core]
[  342.607519]  mlx5e_close+0x42/0x60 [mlx5_core]
[  342.613005]  __dev_close_many+0xb1/0x120
[  342.617911]  dev_close_many+0xa2/0x170
[  342.622622]  rollback_registered_many+0x148/0x460
[  342.628401]  ? __lock_acquire+0x48d/0x11b0
[  342.633498]  ? unregister_netdev+0xe/0x20
[  342.638495]  rollback_registered+0x56/0x90
[  342.643588]  unregister_netdevice_queue+0x7e/0x100
[  342.649461]  unregister_netdev+0x18/0x20
[  342.654362]  mlx5e_remove+0x2a/0x50 [mlx5_core]
[  342.659944]  mlx5_remove_device+0xe5/0x110 [mlx5_core]
[  342.666208]  mlx5_unregister_interface+0x39/0x90 [mlx5_core]
[  342.673038]  cleanup+0x5/0xbfc [mlx5_core]
[  342.678094]  __x64_sys_delete_module+0x16b/0x240
[  342.683725]  ? do_syscall_64+0x1c/0x210
[  342.688476]  do_syscall_64+0x5a/0x210
[  342.693025]  entry_SYSCALL_64_after_hwframe+0x49/0xbe

Fixes: 8d5d885275 ("xdp: rhashtable with allocator ID to pointer mapping")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-08-16 21:55:21 +02:00
Vlad Buslov
32039eac4c net: sched: act_ife: always release ife action on init error
Action init API was changed to always take reference to action, even when
overwriting existing action. Substitute conditional action release, which
was executed only if action is newly created, with unconditional release in
tcf_ife_init() error handling code to prevent double free or memory leak in
case of overwrite.

Fixes: 4e8ddd7f17 ("net: sched: don't release reference on action overwrite")
Reported-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-16 12:12:12 -07:00
Jason Gunthorpe
89982f7cce Linux 4.18
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Merge tag 'v4.18' into rdma.git for-next

Resolve merge conflicts from the -rc cycle against the rdma.git tree:

Conflicts:
 drivers/infiniband/core/uverbs_cmd.c
  - New ifs added to ib_uverbs_ex_create_flow in -rc and for-next
  - Merge removal of file->ucontext in for-next with new code in -rc
 drivers/infiniband/core/uverbs_main.c
  - for-next removed code from ib_uverbs_write() that was modified
    in for-rc

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-08-16 13:12:00 -06:00
Hangbin Liu
a51c76b4df cls_matchall: fix tcf_unbind_filter missing
Fix tcf_unbind_filter missing in cls_matchall as this will trigger
WARN_ON() in cbq_destroy_class().

Fixes: fd62d9f5c5 ("net/sched: matchall: Fix configuration race")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-16 12:08:26 -07:00
Pablo Neira Ayuso
feb9f55c33 netfilter: nft_dynset: allow dynamic updates of non-anonymous set
This check is superfluous since it breaks valid configurations, remove it.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:37:11 +02:00
Máté Eckl
90d827f06b netfilter: nft_tproxy: Fix missing-braces warning
This patch fixes a warning reported by the kbuild test robot (from linux-next
tree):
   net/netfilter/nft_tproxy.c: In function 'nft_tproxy_eval_v6':
>> net/netfilter/nft_tproxy.c:85:9: warning: missing braces around initializer [-Wmissing-braces]
     struct in6_addr taddr = {0};
            ^
   net/netfilter/nft_tproxy.c:85:9: warning: (near initialization for 'taddr.in6_u') [-Wmissing-braces]

This warning is actually caused by a gcc bug already resolved in newer
versions (kbuild used 4.9) so this kind of initialization is omitted and
memset is used instead.

Fixes: 4ed8eb6570 ("netfilter: nf_tables: Add native tproxy support")
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:37:10 +02:00
Harsha Sharma
3206c516ce netfilter: nft_ct: make l3 protocol field optional for timeout object
If l3 protocol value is not specified for ct timeout object then use the
value from nft_ctx protocol family.

Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:37:08 +02:00
Michal Hocko
a148ce1537 netfilter: x_tables: do not fail xt_alloc_table_info too easilly
eacd86ca3b ("net/netfilter/x_tables.c: use kvmalloc()
in xt_alloc_table_info()") has unintentionally fortified
xt_alloc_table_info allocation when __GFP_RETRY has been dropped from
the vmalloc fallback. Later on there was a syzbot report that this
can lead to OOM killer invocations when tables are too large and
0537250fdc ("netfilter: x_tables: make allocation less aggressive")
has been merged to restore the original behavior. Georgi Nikolov however
noticed that he is not able to install his iptables anymore so this can
be seen as a regression.

The primary argument for 0537250fdc was that this allocation path
shouldn't really trigger the OOM killer and kill innocent tasks. On the
other hand the interface requires root and as such should allow what the
admin asks for. Root inside a namespaces makes this more complicated
because those might be not trusted in general. If they are not then such
namespaces should be restricted anyway. Therefore drop the __GFP_NORETRY
and replace it by __GFP_ACCOUNT to enfore memcg constrains on it.

Fixes: 0537250fdc ("netfilter: x_tables: make allocation less aggressive")
Reported-by: Georgi Nikolov <gnikolov@icdsoft.com>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:37:05 +02:00
Florian Westphal
1c117d3b72 netfilter: conntrack: fix removal of conntrack entries when l4tracker is removed
nf_ct_l4proto_unregister_one() leaves conntracks added by
to-be-removed tracker behind, nf_ct_l4proto_unregister has to iterate
for each protocol to be removed.

v2: call nf_ct_iterate_destroy without holding nf_ct_proto_mutex.

Fixes: 2c41f33c1b ("netfilter: move table iteration out of netns exit paths")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:37:04 +02:00
Florian Westphal
6a48de0144 netfilter: nf_tables: don't prevent event handler from device cleanup on netns exit
When a netnsamespace exits, the nf_tables pernet_ops will remove all rules.
However, there is one caveat:

Base chains that register ingress hooks will cause use-after-free:
device is already gone at that point.

The device event handlers prevent this from happening:
netns exit synthesizes unregister events for all devices.

However, an improper fix for a race condition made the notifiers a no-op
in case they get called from netns exit path, so revert that part.

This is safe now as the previous patch fixed nf_tables pernet ops
and device notifier initialisation ordering.

Fixes: 0a2cf5ee43 ("netfilter: nf_tables: close race between netns exit and rmmod")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:37:03 +02:00
Florian Westphal
d209df3e7f netfilter: nf_tables: fix register ordering
We must register nfnetlink ops last, as that exposes nf_tables to
userspace.  Without this, we could theoretically get nfnetlink request
before net->nft state has been initialized.

Fixes: 99633ab29b ("netfilter: nf_tables: complete net namespace support")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:37:02 +02:00
Florian Westphal
3e673b23b5 netfilter: fix memory leaks on netlink_dump_start error
Shaochun Chen points out we leak dumper filter state allocations
stored in dump_control->data in case there is an error before netlink sets
cb_running (after which ->done will be called at some point).

In order to fix this, add .start functions and move allocations there.

Same pattern as used in commit 90fd131afc
("netfilter: nf_tables: move dumper state allocation into ->start").

Reported-by: shaochun chen <cscnull@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:37:00 +02:00
Taehee Yoo
4ef360dd6a netfilter: nft_set: fix allocation size overflow in privsize callback.
In order to determine allocation size of set, ->privsize is invoked.
At this point, both desc->size and size of each data structure of set
are used. desc->size means number of element that is given by user.
desc->size is u32 type. so that upperlimit of set element is 4294967295.
but return type of ->privsize is also u32. hence overflow can occurred.

test commands:
   %nft add table ip filter
   %nft add set ip filter hash1 { type ipv4_addr \; size 4294967295 \; }
   %nft list ruleset

splat looks like:
[ 1239.202910] kasan: CONFIG_KASAN_INLINE enabled
[ 1239.208788] kasan: GPF could be caused by NULL-ptr deref or user memory access
[ 1239.217625] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI
[ 1239.219329] CPU: 0 PID: 1603 Comm: nft Not tainted 4.18.0-rc5+ #7
[ 1239.229091] RIP: 0010:nft_hash_walk+0x1d2/0x310 [nf_tables_set]
[ 1239.229091] Code: 84 d2 7f 10 4c 89 e7 89 44 24 38 e8 d8 5a 17 e0 8b 44 24 38 48 8d 7b 10 41 0f b6 0c 24 48 89 fa 48 89 fe 48 c1 ea 03 83 e6 07 <42> 0f b6 14 3a 40 38 f2 7f 1a 84 d2 74 16
[ 1239.229091] RSP: 0018:ffff8801118cf358 EFLAGS: 00010246
[ 1239.229091] RAX: 0000000000000000 RBX: 0000000000020400 RCX: 0000000000000001
[ 1239.229091] RDX: 0000000000004082 RSI: 0000000000000000 RDI: 0000000000020410
[ 1239.229091] RBP: ffff880114d5a988 R08: 0000000000007e94 R09: ffff880114dd8030
[ 1239.229091] R10: ffff880114d5a988 R11: ffffed00229bb006 R12: ffff8801118cf4d0
[ 1239.229091] R13: ffff8801118cf4d8 R14: 0000000000000000 R15: dffffc0000000000
[ 1239.229091] FS:  00007f5a8fe0b700(0000) GS:ffff88011b600000(0000) knlGS:0000000000000000
[ 1239.229091] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1239.229091] CR2: 00007f5a8ecc27b0 CR3: 000000010608e000 CR4: 00000000001006f0
[ 1239.229091] Call Trace:
[ 1239.229091]  ? nft_hash_remove+0xf0/0xf0 [nf_tables_set]
[ 1239.229091]  ? memset+0x1f/0x40
[ 1239.229091]  ? __nla_reserve+0x9f/0xb0
[ 1239.229091]  ? memcpy+0x34/0x50
[ 1239.229091]  nf_tables_dump_set+0x9a1/0xda0 [nf_tables]
[ 1239.229091]  ? __kmalloc_reserve.isra.29+0x2e/0xa0
[ 1239.229091]  ? nft_chain_hash_obj+0x630/0x630 [nf_tables]
[ 1239.229091]  ? nf_tables_commit+0x2c60/0x2c60 [nf_tables]
[ 1239.229091]  netlink_dump+0x470/0xa20
[ 1239.229091]  __netlink_dump_start+0x5ae/0x690
[ 1239.229091]  nft_netlink_dump_start_rcu+0xd1/0x160 [nf_tables]
[ 1239.229091]  nf_tables_getsetelem+0x2e5/0x4b0 [nf_tables]
[ 1239.229091]  ? nft_get_set_elem+0x440/0x440 [nf_tables]
[ 1239.229091]  ? nft_chain_hash_obj+0x630/0x630 [nf_tables]
[ 1239.229091]  ? nf_tables_dump_obj_done+0x70/0x70 [nf_tables]
[ 1239.229091]  ? nla_parse+0xab/0x230
[ 1239.229091]  ? nft_get_set_elem+0x440/0x440 [nf_tables]
[ 1239.229091]  nfnetlink_rcv_msg+0x7f0/0xab0 [nfnetlink]
[ 1239.229091]  ? nfnetlink_bind+0x1d0/0x1d0 [nfnetlink]
[ 1239.229091]  ? debug_show_all_locks+0x290/0x290
[ 1239.229091]  ? sched_clock_cpu+0x132/0x170
[ 1239.229091]  ? find_held_lock+0x39/0x1b0
[ 1239.229091]  ? sched_clock_local+0x10d/0x130
[ 1239.229091]  netlink_rcv_skb+0x211/0x320
[ 1239.229091]  ? nfnetlink_bind+0x1d0/0x1d0 [nfnetlink]
[ 1239.229091]  ? netlink_ack+0x7b0/0x7b0
[ 1239.229091]  ? ns_capable_common+0x6e/0x110
[ 1239.229091]  nfnetlink_rcv+0x2d1/0x310 [nfnetlink]
[ 1239.229091]  ? nfnetlink_rcv_batch+0x10f0/0x10f0 [nfnetlink]
[ 1239.229091]  ? netlink_deliver_tap+0x829/0x930
[ 1239.229091]  ? lock_acquire+0x265/0x2e0
[ 1239.229091]  netlink_unicast+0x406/0x520
[ 1239.509725]  ? netlink_attachskb+0x5b0/0x5b0
[ 1239.509725]  ? find_held_lock+0x39/0x1b0
[ 1239.509725]  netlink_sendmsg+0x987/0xa20
[ 1239.509725]  ? netlink_unicast+0x520/0x520
[ 1239.509725]  ? _copy_from_user+0xa9/0xc0
[ 1239.509725]  __sys_sendto+0x21a/0x2c0
[ 1239.509725]  ? __ia32_sys_getpeername+0xa0/0xa0
[ 1239.509725]  ? retint_kernel+0x10/0x10
[ 1239.509725]  ? sched_clock_cpu+0x132/0x170
[ 1239.509725]  ? find_held_lock+0x39/0x1b0
[ 1239.509725]  ? lock_downgrade+0x540/0x540
[ 1239.509725]  ? up_read+0x1c/0x100
[ 1239.509725]  ? __do_page_fault+0x763/0x970
[ 1239.509725]  ? retint_user+0x18/0x18
[ 1239.509725]  __x64_sys_sendto+0x177/0x180
[ 1239.509725]  do_syscall_64+0xaa/0x360
[ 1239.509725]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 1239.509725] RIP: 0033:0x7f5a8f468e03
[ 1239.509725] Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb d0 0f 1f 84 00 00 00 00 00 83 3d 49 c9 2b 00 00 75 13 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8
[ 1239.509725] RSP: 002b:00007ffd78d0b778 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 1239.509725] RAX: ffffffffffffffda RBX: 00007ffd78d0c890 RCX: 00007f5a8f468e03
[ 1239.509725] RDX: 0000000000000034 RSI: 00007ffd78d0b7e0 RDI: 0000000000000003
[ 1239.509725] RBP: 00007ffd78d0b7d0 R08: 00007f5a8f15c160 R09: 000000000000000c
[ 1239.509725] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd78d0b7e0
[ 1239.509725] R13: 0000000000000034 R14: 00007f5a8f9aff60 R15: 00005648040094b0
[ 1239.509725] Modules linked in: nf_tables_set nf_tables nfnetlink ip_tables x_tables
[ 1239.670713] ---[ end trace 39375adcda140f11 ]---
[ 1239.676016] RIP: 0010:nft_hash_walk+0x1d2/0x310 [nf_tables_set]
[ 1239.682834] Code: 84 d2 7f 10 4c 89 e7 89 44 24 38 e8 d8 5a 17 e0 8b 44 24 38 48 8d 7b 10 41 0f b6 0c 24 48 89 fa 48 89 fe 48 c1 ea 03 83 e6 07 <42> 0f b6 14 3a 40 38 f2 7f 1a 84 d2 74 16
[ 1239.705108] RSP: 0018:ffff8801118cf358 EFLAGS: 00010246
[ 1239.711115] RAX: 0000000000000000 RBX: 0000000000020400 RCX: 0000000000000001
[ 1239.719269] RDX: 0000000000004082 RSI: 0000000000000000 RDI: 0000000000020410
[ 1239.727401] RBP: ffff880114d5a988 R08: 0000000000007e94 R09: ffff880114dd8030
[ 1239.735530] R10: ffff880114d5a988 R11: ffffed00229bb006 R12: ffff8801118cf4d0
[ 1239.743658] R13: ffff8801118cf4d8 R14: 0000000000000000 R15: dffffc0000000000
[ 1239.751785] FS:  00007f5a8fe0b700(0000) GS:ffff88011b600000(0000) knlGS:0000000000000000
[ 1239.760993] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1239.767560] CR2: 00007f5a8ecc27b0 CR3: 000000010608e000 CR4: 00000000001006f0
[ 1239.775679] Kernel panic - not syncing: Fatal exception
[ 1239.776630] Kernel Offset: 0x1f000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 1239.776630] Rebooting in 5 seconds..

Fixes: 20a69341f2 ("netfilter: nf_tables: add netlink set API")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:36:59 +02:00
Florian Westphal
da786717e0 netfilter: ip6t_rpfilter: set F_IFACE for linklocal addresses
Roman reports that DHCPv6 client no longer sees replies from server
due to

ip6tables -t raw -A PREROUTING -m rpfilter --invert -j DROP

rule.  We need to set the F_IFACE flag for linklocal addresses, they
are scoped per-device.

Fixes: 47b7e7f828 ("netfilter: don't set F_IFACE on ipv6 fib lookups")
Reported-by: Roman Mamedov <rm@romanrm.net>
Tested-by: Roman Mamedov <rm@romanrm.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:36:58 +02:00
Matteo Croce
b71ed54dc2 ipvs: don't show negative times in ip_vs_conn
Since commit 500462a9de ("timers: Switch to a non-cascading wheel"),
timers duration can last even 12.5% more than the scheduled interval.

IPVS has two handlers, /proc/net/ip_vs_conn and /proc/net/ip_vs_conn_sync,
which shows the remaining time before that a connection expires.
The default expire time for a connection is 60 seconds, and the
expiration timer can fire even 4 seconds later than the scheduled time.
The expiration time is calculated subtracting jiffies to the scheduled
expiration time, and it's shown as a huge number when the timer fires late,
since both values are unsigned.

This can confuse script and tools which relies on it, like ipvsadm:

    root@mcroce-redhat:~# while ipvsadm -lc |grep SYN_RECV; do sleep 1 ; done
    TCP 00:05  SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 00:04  SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 00:03  SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 00:02  SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 00:01  SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 00:00  SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 68719476:44 SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 68719476:43 SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 68719476:42 SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 68719476:41 SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 68719476:40 SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000
    TCP 68719476:39 SYN_RECV    [fc00:1::1]:55732  [fc00:1::2]:8000   [fc00:2000::1]:8000

Signed-off-by: Matteo Croce <mcroce@redhat.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:36:57 +02:00
Tan Hu
a53b42c118 ipvs: fix race between ip_vs_conn_new() and ip_vs_del_dest()
We came across infinite loop in ipvs when using ipvs in docker
env.

When ipvs receives new packets and cannot find an ipvs connection,
it will create a new connection, then if the dest is unavailable
(i.e. IP_VS_DEST_F_AVAILABLE), the packet will be dropped sliently.

But if the dropped packet is the first packet of this connection,
the connection control timer never has a chance to start and the
ipvs connection cannot be released. This will lead to memory leak, or
infinite loop in cleanup_net() when net namespace is released like
this:

    ip_vs_conn_net_cleanup at ffffffffa0a9f31a [ip_vs]
    __ip_vs_cleanup at ffffffffa0a9f60a [ip_vs]
    ops_exit_list at ffffffff81567a49
    cleanup_net at ffffffff81568b40
    process_one_work at ffffffff810a851b
    worker_thread at ffffffff810a9356
    kthread at ffffffff810b0b6f
    ret_from_fork at ffffffff81697a18

race condition:
    CPU1                           CPU2
    ip_vs_in()
      ip_vs_conn_new()
                                   ip_vs_del_dest()
                                     __ip_vs_unlink_dest()
                                       ~IP_VS_DEST_F_AVAILABLE
      cp->dest && !IP_VS_DEST_F_AVAILABLE
      __ip_vs_conn_put
    ...
    cleanup_net  ---> infinite looping

Fix this by checking whether the timer already started.

Signed-off-by: Tan Hu <tan.hu@zte.com.cn>
Reviewed-by: Jiang Biao <jiang.biao2@zte.com.cn>
Acked-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-08-16 19:36:51 +02:00
Linus Torvalds
dafa5f6577 Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
 "API:
   - Fix dcache flushing crash in skcipher.
   - Add hash finup self-tests.
   - Reschedule during speed tests.

  Algorithms:
   - Remove insecure vmac and replace it with vmac64.
   - Add public key verification for DH/ECDH.

  Drivers:
   - Decrease priority of sha-mb on x86.
   - Improve NEON latency/throughput on ARM64.
   - Add md5/sha384/sha512/des/3des to inside-secure.
   - Support eip197d in inside-secure.
   - Only register algorithms supported by the host in virtio.
   - Add cts and remove incompatible cts1 from ccree.
   - Add hisilicon SEC security accelerator driver.
   - Replace msm hwrng driver with qcom pseudo rng driver.

  Misc:
   - Centralize CRC polynomials"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (121 commits)
  crypto: arm64/ghash-ce - implement 4-way aggregation
  crypto: arm64/ghash-ce - replace NEON yield check with block limit
  crypto: hisilicon - sec_send_request() can be static
  lib/mpi: remove redundant variable esign
  crypto: arm64/aes-ce-gcm - don't reload key schedule if avoidable
  crypto: arm64/aes-ce-gcm - implement 2-way aggregation
  crypto: arm64/aes-ce-gcm - operate on two input blocks at a time
  crypto: dh - make crypto_dh_encode_key() make robust
  crypto: dh - fix calculating encoded key size
  crypto: ccp - Check for NULL PSP pointer at module unload
  crypto: arm/chacha20 - always use vrev for 16-bit rotates
  crypto: ccree - allow bigger than sector XTS op
  crypto: ccree - zero all of request ctx before use
  crypto: ccree - remove cipher ivgen left overs
  crypto: ccree - drop useless type flag during reg
  crypto: ablkcipher - fix crash flushing dcache in error path
  crypto: blkcipher - fix crash flushing dcache in error path
  crypto: skcipher - fix crash flushing dcache in error path
  crypto: skcipher - remove unnecessary setting of walk->nbytes
  crypto: scatterwalk - remove scatterwalk_samebuf()
  ...
2018-08-15 16:01:47 -07:00
Linus Torvalds
9a76aba02a Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "Highlights:

   - Gustavo A. R. Silva keeps working on the implicit switch fallthru
     changes.

   - Support 802.11ax High-Efficiency wireless in cfg80211 et al, From
     Luca Coelho.

   - Re-enable ASPM in r8169, from Kai-Heng Feng.

   - Add virtual XFRM interfaces, which avoids all of the limitations of
     existing IPSEC tunnels. From Steffen Klassert.

   - Convert GRO over to use a hash table, so that when we have many
     flows active we don't traverse a long list during accumluation.

   - Many new self tests for routing, TC, tunnels, etc. Too many
     contributors to mention them all, but I'm really happy to keep
     seeing this stuff.

   - Hardware timestamping support for dpaa_eth/fsl-fman from Yangbo Lu.

   - Lots of cleanups and fixes in L2TP code from Guillaume Nault.

   - Add IPSEC offload support to netdevsim, from Shannon Nelson.

   - Add support for slotting with non-uniform distribution to netem
     packet scheduler, from Yousuk Seung.

   - Add UDP GSO support to mlx5e, from Boris Pismenny.

   - Support offloading of Team LAG in NFP, from John Hurley.

   - Allow to configure TX queue selection based upon RX queue, from
     Amritha Nambiar.

   - Support ethtool ring size configuration in aquantia, from Anton
     Mikaev.

   - Support DSCP and flowlabel per-transport in SCTP, from Xin Long.

   - Support list based batching and stack traversal of SKBs, this is
     very exciting work. From Edward Cree.

   - Busyloop optimizations in vhost_net, from Toshiaki Makita.

   - Introduce the ETF qdisc, which allows time based transmissions. IGB
     can offload this in hardware. From Vinicius Costa Gomes.

   - Add parameter support to devlink, from Moshe Shemesh.

   - Several multiplication and division optimizations for BPF JIT in
     nfp driver, from Jiong Wang.

   - Lots of prepatory work to make more of the packet scheduler layer
     lockless, when possible, from Vlad Buslov.

   - Add ACK filter and NAT awareness to sch_cake packet scheduler, from
     Toke Høiland-Jørgensen.

   - Support regions and region snapshots in devlink, from Alex Vesker.

   - Allow to attach XDP programs to both HW and SW at the same time on
     a given device, with initial support in nfp. From Jakub Kicinski.

   - Add TLS RX offload and support in mlx5, from Ilya Lesokhin.

   - Use PHYLIB in r8169 driver, from Heiner Kallweit.

   - All sorts of changes to support Spectrum 2 in mlxsw driver, from
     Ido Schimmel.

   - PTP support in mv88e6xxx DSA driver, from Andrew Lunn.

   - Make TCP_USER_TIMEOUT socket option more accurate, from Jon
     Maxwell.

   - Support for templates in packet scheduler classifier, from Jiri
     Pirko.

   - IPV6 support in RDS, from Ka-Cheong Poon.

   - Native tproxy support in nf_tables, from Máté Eckl.

   - Maintain IP fragment queue in an rbtree, but optimize properly for
     in-order frags. From Peter Oskolkov.

   - Improvde handling of ACKs on hole repairs, from Yuchung Cheng"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1996 commits)
  bpf: test: fix spelling mistake "REUSEEPORT" -> "REUSEPORT"
  hv/netvsc: Fix NULL dereference at single queue mode fallback
  net: filter: mark expected switch fall-through
  xen-netfront: fix warn message as irq device name has '/'
  cxgb4: Add new T5 PCI device ids 0x50af and 0x50b0
  net: dsa: mv88e6xxx: missing unlock on error path
  rds: fix building with IPV6=m
  inet/connection_sock: prefer _THIS_IP_ to current_text_addr
  net: dsa: mv88e6xxx: bitwise vs logical bug
  net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()
  ieee802154: hwsim: using right kind of iteration
  net: hns3: Add vlan filter setting by ethtool command -K
  net: hns3: Set tx ring' tc info when netdev is up
  net: hns3: Remove tx ring BD len register in hns3_enet
  net: hns3: Fix desc num set to default when setting channel
  net: hns3: Fix for phy link issue when using marvell phy driver
  net: hns3: Fix for information of phydev lost problem when down/up
  net: hns3: Fix for command format parsing error in hclge_is_all_function_id_zero
  net: hns3: Add support for serdes loopback selftest
  bnxt_en: take coredump_record structure off stack
  ...
2018-08-15 15:04:25 -07:00
Linus Torvalds
e026bcc561 Kbuild updates for v4.19
- verify depmod is installed before modules_install
 
 - support build salt in case build ids must be unique between builds
 
 - allow users to specify additional host compiler flags via HOST*FLAGS,
   and rename internal variables to KBUILD_HOST*FLAGS
 
 - update buildtar script to drop vax support, add arm64 support
 
 - update builddeb script for better debarch support
 
 - document the pit-fall of if_changed usage
 
 - fix parallel build of UML with O= option
 
 - make 'samples' target depend on headers_install to fix build errors
 
 - remove deprecated host-progs variable
 
 - add a new coccinelle script for refcount_t vs atomic_t check
 
 - improve double-test coccinelle script
 
 - misc cleanups and fixes
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Merge tag 'kbuild-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - verify depmod is installed before modules_install

 - support build salt in case build ids must be unique between builds

 - allow users to specify additional host compiler flags via HOST*FLAGS,
   and rename internal variables to KBUILD_HOST*FLAGS

 - update buildtar script to drop vax support, add arm64 support

 - update builddeb script for better debarch support

 - document the pit-fall of if_changed usage

 - fix parallel build of UML with O= option

 - make 'samples' target depend on headers_install to fix build errors

 - remove deprecated host-progs variable

 - add a new coccinelle script for refcount_t vs atomic_t check

 - improve double-test coccinelle script

 - misc cleanups and fixes

* tag 'kbuild-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits)
  coccicheck: return proper error code on fail
  Coccinelle: doubletest: reduce side effect false positives
  kbuild: remove deprecated host-progs variable
  kbuild: make samples really depend on headers_install
  um: clean up archheaders recipe
  kbuild: add %asm-generic to no-dot-config-targets
  um: fix parallel building with O= option
  scripts: Add Python 3 support to tracing/draw_functrace.py
  builddeb: Add automatic support for sh{3,4}{,eb} architectures
  builddeb: Add automatic support for riscv* architectures
  builddeb: Add automatic support for m68k architecture
  builddeb: Add automatic support for or1k architecture
  builddeb: Add automatic support for sparc64 architecture
  builddeb: Add automatic support for mips{,64}r6{,el} architectures
  builddeb: Add automatic support for mips64el architecture
  builddeb: Add automatic support for ppc64 and powerpcspe architectures
  builddeb: Introduce functions to simplify kconfig tests in set_debarch
  builddeb: Drop check for 32-bit s390
  builddeb: Change architecture detection fallback to use dpkg-architecture
  builddeb: Skip architecture detection when KBUILD_DEBARCH is set
  ...
2018-08-15 12:09:03 -07:00
Linus Torvalds
8c32685030 audit/stable-4.18 PR 20180814
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 w+REW+TTiht8W6E=
 =tnPz
 -----END PGP SIGNATURE-----

Merge tag 'audit-pr-20180814' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

Pull audit patches from Paul Moore:
 "Twelve audit patches for v4.19 and they run the full gamut from fixes
  to features.

  Notable changes include the ability to use the "exe" audit filter
  field in a wider variety of filter types, a fix for our comparison of
  GID/EGID in audit filter rules, better association of related audit
  records (connecting related audit records together into one audit
  event), and a fix for a potential use-after-free in audit_add_watch().

  All the patches pass the audit-testsuite and merge cleanly on your
  current master branch"

* tag 'audit-pr-20180814' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
  audit: fix use-after-free in audit_add_watch
  audit: use ktime_get_coarse_real_ts64() for timestamps
  audit: use ktime_get_coarse_ts64() for time access
  audit: simplify audit_enabled check in audit_watch_log_rule_change()
  audit: check audit_enabled in audit_tree_log_remove_rule()
  cred: conditionally declare groups-related functions
  audit: eliminate audit_enabled magic number comparison
  audit: rename FILTER_TYPE to FILTER_EXCLUDE
  audit: Fix extended comparison of GID/EGID
  audit: tie ANOM_ABEND records to syscall
  audit: tie SECCOMP records to syscall
  audit: allow other filter list types for AUDIT_EXE
2018-08-15 10:46:54 -07:00
Linus Torvalds
c07b3682cd LED updates for 4.19-rc1
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Merge tag 'leds-for-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds

Pull LED updates from Jacek Anaszewski:
 "LED triggers improvements make the biggest part of this pull request.
  The most striking ones, that allowed for nice cleanups in the triggers
  are:

   - centralized handling of creation and removal of trigger sysfs
     attributes via attribute group

   - addition of module_led_trigger() helper

  The other things that need to be mentioned:

  New features and improvements to existing LED class drivers:

   - lt3593: add DT support, switch to gpiod interface

   - lm3692x: support LED sync configuration, change OF calls to fwnode
     calls

   - apu: modify PC Engines apu/apu2 driver to support apu3

  Change in the drivers/net/can/led.c:

   - mark led trigger as broken since it's in the way for the further
     cleanups. It implements a subset of the netdev trigger and an Ack
     is needed from someone who can actually test and confirm that the
     netdev trigger works for can devices"

* tag 'leds-for-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: (32 commits)
  leds: ns2: Change unsigned to unsigned int
  usb: simplify usbport trigger
  leds: gpio trigger: simplifications from core changes
  leds: backlight trigger: simplifications from core changes
  leds: activity trigger: simplifications from core changes
  leds: default-on trigger: make use of module_led_trigger()
  leds: heartbeat trigger: simplifications from core changes
  leds: oneshot trigger: simplifications from core changes
  leds: transient trigger: simplifications from core changes
  leds: timer trigger: simplifications from core changes
  leds: netdev trigger: simplifications from core changes
  leds: triggers: new function led_set_trigger_data()
  leds: triggers: define module_led_trigger helper
  leds: triggers: handle .trigger_data and .activated() in the core
  leds: triggers: add device attribute support
  leds: triggers: let struct led_trigger::activate() return an error code
  leds: triggers: make the MODULE_LICENSE string match the actual license
  leds: lm3692x: Support LED sync configuration
  dt: bindings: lm3692x: Update binding for LED sync control
  leds: lm3692x: Change DT calls to fwnode calls
  ...
2018-08-14 13:07:22 -07:00
Gustavo A. R. Silva
4597b62f7a net: filter: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Addresses-Coverity-ID: 1472592 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-14 10:11:26 -07:00
Arnd Bergmann
f6f7a26abd rds: fix building with IPV6=m
When CONFIG_RDS_TCP is built-in and CONFIG_IPV6 is a loadable
module, we get a link error agains the modular ipv6_chk_addr()
function:

net/rds/tcp.o: In function `rds_tcp_laddr_check':
tcp.c:(.text+0x3b2): undefined reference to `ipv6_chk_addr'

This adds back a dependency that forces RDS_TCP to also be
a loadable module when IPV6 is one.

Fixes: e65d4d9633 ("rds: Remove IPv6 dependency")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-14 10:06:37 -07:00
Jeremy Cline
66b51b0a03 net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()
req->sdiag_family is a user-controlled value that's used as an array
index. Sanitize it after the bounds check to avoid speculative
out-of-bounds array access.

This also protects the sock_is_registered() call, so this removes the
sanitize call there.

Fixes: e978de7a6d ("net: socket: Fix potential spectre v1 gadget in sock_is_registered")
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: konrad.wilk@oracle.com
Cc: jamie.iles@oracle.com
Cc: liran.alon@oracle.com
Cc: stable@vger.kernel.org
Signed-off-by: Jeremy Cline <jcline@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-14 10:01:24 -07:00
Arnd Bergmann
c2ebc25674 l2tp: fix unused function warning
Removing one of the callers of pppol2tp_session_get_sock caused a harmless
warning in some configurations:

net/l2tp/l2tp_ppp.c:142:21: 'pppol2tp_session_get_sock' defined but not used [-Wunused-function]

Rather than adding another #ifdef here, using a proper IS_ENABLED()
check makes the code more readable and avoids those warnings while
letting the compiler figure out for itself which code is needed.

This adds one pointer for the unused show() callback in struct
l2tp_session, but that seems harmless.

Fixes: b0e29063dc ("l2tp: remove pppol2tp_session_ioctl()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 20:45:49 -07:00
Linus Torvalds
a66b4cd1e7 Merge branch 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs open-related updates from Al Viro:

 - "do we need fput() or put_filp()" rules are gone - it's always fput()
   now. We keep track of that state where it belongs - in ->f_mode.

 - int *opened mess killed - in finish_open(), in ->atomic_open()
   instances and in fs/namei.c code around do_last()/lookup_open()/atomic_open().

 - alloc_file() wrappers with saner calling conventions are introduced
   (alloc_file_clone() and alloc_file_pseudo()); callers converted, with
   much simplification.

 - while we are at it, saner calling conventions for path_init() and
   link_path_walk(), simplifying things inside fs/namei.c (both on
   open-related paths and elsewhere).

* 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (40 commits)
  few more cleanups of link_path_walk() callers
  allow link_path_walk() to take ERR_PTR()
  make path_init() unconditionally paired with terminate_walk()
  document alloc_file() changes
  make alloc_file() static
  do_shmat(): grab shp->shm_file earlier, switch to alloc_file_clone()
  new helper: alloc_file_clone()
  create_pipe_files(): switch the first allocation to alloc_file_pseudo()
  anon_inode_getfile(): switch to alloc_file_pseudo()
  hugetlb_file_setup(): switch to alloc_file_pseudo()
  ocxlflash_getfile(): switch to alloc_file_pseudo()
  cxl_getfile(): switch to alloc_file_pseudo()
  ... and switch shmem_file_setup() to alloc_file_pseudo()
  __shmem_file_setup(): reorder allocations
  new wrapper: alloc_file_pseudo()
  kill FILE_{CREATED,OPENED}
  switch atomic_open() and lookup_open() to returning 0 in all success cases
  document ->atomic_open() changes
  ->atomic_open(): return 0 in all success cases
  get rid of 'opened' in path_openat() and the helpers downstream
  ...
2018-08-13 19:58:36 -07:00
Hangbin Liu
008369dcc5 net_sched: Fix missing res info when create new tc_index filter
Li Shuang reported the following warn:

[  733.484610] WARNING: CPU: 6 PID: 21123 at net/sched/sch_cbq.c:1418 cbq_destroy_class+0x5d/0x70 [sch_cbq]
[  733.495190] Modules linked in: sch_cbq cls_tcindex sch_dsmark rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat l
[  733.574155]  syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm igb ixgbe ahci libahci i2c_algo_bit libata i40e i2c_core dca mdio megaraid_sas dm_mirror dm_region_hash dm_log dm_mod
[  733.592500] CPU: 6 PID: 21123 Comm: tc Not tainted 4.18.0-rc8.latest+ #131
[  733.600169] Hardware name: Dell Inc. PowerEdge R730/0WCJNT, BIOS 2.1.5 04/11/2016
[  733.608518] RIP: 0010:cbq_destroy_class+0x5d/0x70 [sch_cbq]
[  733.614734] Code: e7 d9 d2 48 8b 7b 48 e8 61 05 da d2 48 8d bb f8 00 00 00 e8 75 ae d5 d2 48 39 eb 74 0a 48 89 df 5b 5d e9 16 6c 94 d2 5b 5d c3 <0f> 0b eb b6 0f 1f 44 00 00 66 2e 0f 1f 84
[  733.635798] RSP: 0018:ffffbfbb066bb9d8 EFLAGS: 00010202
[  733.641627] RAX: 0000000000000001 RBX: ffff9cdd17392800 RCX: 000000008010000f
[  733.649588] RDX: ffff9cdd1df547e0 RSI: ffff9cdd17392800 RDI: ffff9cdd0f84c800
[  733.657547] RBP: ffff9cdd0f84c800 R08: 0000000000000001 R09: 0000000000000000
[  733.665508] R10: ffff9cdd0f84d000 R11: 0000000000000001 R12: 0000000000000001
[  733.673469] R13: 0000000000000000 R14: 0000000000000001 R15: ffff9cdd17392200
[  733.681430] FS:  00007f911890a740(0000) GS:ffff9cdd1f8c0000(0000) knlGS:0000000000000000
[  733.690456] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  733.696864] CR2: 0000000000b5544c CR3: 0000000859374002 CR4: 00000000001606e0
[  733.704826] Call Trace:
[  733.707554]  cbq_destroy+0xa1/0xd0 [sch_cbq]
[  733.712318]  qdisc_destroy+0x62/0x130
[  733.716401]  dsmark_destroy+0x2a/0x70 [sch_dsmark]
[  733.721745]  qdisc_destroy+0x62/0x130
[  733.725829]  qdisc_graft+0x3ba/0x470
[  733.729817]  tc_get_qdisc+0x2a6/0x2c0
[  733.733901]  ? cred_has_capability+0x7d/0x130
[  733.738761]  rtnetlink_rcv_msg+0x263/0x2d0
[  733.743330]  ? rtnl_calcit.isra.30+0x110/0x110
[  733.748287]  netlink_rcv_skb+0x4d/0x130
[  733.752576]  netlink_unicast+0x1a3/0x250
[  733.756949]  netlink_sendmsg+0x2ae/0x3a0
[  733.761324]  sock_sendmsg+0x36/0x40
[  733.765213]  ___sys_sendmsg+0x26f/0x2d0
[  733.769493]  ? handle_pte_fault+0x586/0xdf0
[  733.774158]  ? __handle_mm_fault+0x389/0x500
[  733.778919]  ? __sys_sendmsg+0x5e/0xa0
[  733.783099]  __sys_sendmsg+0x5e/0xa0
[  733.787087]  do_syscall_64+0x5b/0x180
[  733.791171]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  733.796805] RIP: 0033:0x7f9117f23f10
[  733.800791] Code: c3 48 8b 05 82 6f 2c 00 f7 db 64 89 18 48 83 cb ff eb dd 0f 1f 80 00 00 00 00 83 3d 8d d0 2c 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8
[  733.821873] RSP: 002b:00007ffe96818398 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  733.830319] RAX: ffffffffffffffda RBX: 000000005b71244c RCX: 00007f9117f23f10
[  733.838280] RDX: 0000000000000000 RSI: 00007ffe968183e0 RDI: 0000000000000003
[  733.846241] RBP: 00007ffe968183e0 R08: 000000000000ffff R09: 0000000000000003
[  733.854202] R10: 00007ffe96817e20 R11: 0000000000000246 R12: 0000000000000000
[  733.862161] R13: 0000000000662ee0 R14: 0000000000000000 R15: 0000000000000000
[  733.870121] ---[ end trace 28edd4aad712ddca ]---

This is because we didn't update f->result.res when create new filter. Then in
tcindex_delete() -> tcf_unbind_filter(), we will failed to find out the res
and unbind filter, which will trigger the WARN_ON() in cbq_destroy_class().

Fix it by updating f->result.res when create new filter.

Fixes: 6e0565697a ("net_sched: fix another crash in cls_tcindex")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 19:37:42 -07:00
Hangbin Liu
2df8bee565 net_sched: fix NULL pointer dereference when delete tcindex filter
Li Shuang reported the following crash:

[   71.267724] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
[   71.276456] PGD 800000085d9bd067 P4D 800000085d9bd067 PUD 859a0b067 PMD 0
[   71.284127] Oops: 0000 [#1] SMP PTI
[   71.288015] CPU: 12 PID: 2386 Comm: tc Not tainted 4.18.0-rc8.latest+ #131
[   71.295686] Hardware name: Dell Inc. PowerEdge R730/0WCJNT, BIOS 2.1.5 04/11/2016
[   71.304037] RIP: 0010:tcindex_delete+0x72/0x280 [cls_tcindex]
[   71.310446] Code: 00 31 f6 48 87 75 20 48 85 f6 74 11 48 8b 47 18 48 8b 40 08 48 8b 40 50 e8 fb a6 f8 fc 48 85 db 0f 84 dc 00 00 00 48 8b 73 18 <8b> 56 04 48 8d 7e 04 85 d2 0f 84 7b 01 00
[   71.331517] RSP: 0018:ffffb45207b3f898 EFLAGS: 00010282
[   71.337345] RAX: ffff8ad3d72d6360 RBX: ffff8acc84393680 RCX: 000000000000002e
[   71.345306] RDX: ffff8ad3d72c8570 RSI: 0000000000000000 RDI: ffff8ad847a45800
[   71.353277] RBP: ffff8acc84393688 R08: ffff8ad3d72c8400 R09: 0000000000000000
[   71.361238] R10: ffff8ad3de786e00 R11: 0000000000000000 R12: ffffb45207b3f8c7
[   71.369199] R13: ffff8ad3d93bd2a0 R14: 000000000000002e R15: ffff8ad3d72c9600
[   71.377161] FS:  00007f9d3ec3e740(0000) GS:ffff8ad3df980000(0000) knlGS:0000000000000000
[   71.386188] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   71.392597] CR2: 0000000000000004 CR3: 0000000852f06003 CR4: 00000000001606e0
[   71.400558] Call Trace:
[   71.403299]  tcindex_destroy_element+0x25/0x40 [cls_tcindex]
[   71.409611]  tcindex_walk+0xbb/0x110 [cls_tcindex]
[   71.414953]  tcindex_destroy+0x44/0x90 [cls_tcindex]
[   71.420492]  ? tcindex_delete+0x280/0x280 [cls_tcindex]
[   71.426323]  tcf_proto_destroy+0x16/0x40
[   71.430696]  tcf_chain_flush+0x51/0x70
[   71.434876]  tcf_block_put_ext.part.30+0x8f/0x1b0
[   71.440122]  tcf_block_put+0x4d/0x70
[   71.444108]  cbq_destroy+0x4d/0xd0 [sch_cbq]
[   71.448869]  qdisc_destroy+0x62/0x130
[   71.452951]  dsmark_destroy+0x2a/0x70 [sch_dsmark]
[   71.458300]  qdisc_destroy+0x62/0x130
[   71.462373]  qdisc_graft+0x3ba/0x470
[   71.466359]  tc_get_qdisc+0x2a6/0x2c0
[   71.470443]  ? cred_has_capability+0x7d/0x130
[   71.475307]  rtnetlink_rcv_msg+0x263/0x2d0
[   71.479875]  ? rtnl_calcit.isra.30+0x110/0x110
[   71.484832]  netlink_rcv_skb+0x4d/0x130
[   71.489109]  netlink_unicast+0x1a3/0x250
[   71.493482]  netlink_sendmsg+0x2ae/0x3a0
[   71.497859]  sock_sendmsg+0x36/0x40
[   71.501748]  ___sys_sendmsg+0x26f/0x2d0
[   71.506029]  ? handle_pte_fault+0x586/0xdf0
[   71.510694]  ? __handle_mm_fault+0x389/0x500
[   71.515457]  ? __sys_sendmsg+0x5e/0xa0
[   71.519636]  __sys_sendmsg+0x5e/0xa0
[   71.523626]  do_syscall_64+0x5b/0x180
[   71.527711]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   71.533345] RIP: 0033:0x7f9d3e257f10
[   71.537331] Code: c3 48 8b 05 82 6f 2c 00 f7 db 64 89 18 48 83 cb ff eb dd 0f 1f 80 00 00 00 00 83 3d 8d d0 2c 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8
[   71.558401] RSP: 002b:00007fff6f893398 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   71.566848] RAX: ffffffffffffffda RBX: 000000005b71274d RCX: 00007f9d3e257f10
[   71.574810] RDX: 0000000000000000 RSI: 00007fff6f8933e0 RDI: 0000000000000003
[   71.582770] RBP: 00007fff6f8933e0 R08: 000000000000ffff R09: 0000000000000003
[   71.590729] R10: 00007fff6f892e20 R11: 0000000000000246 R12: 0000000000000000
[   71.598689] R13: 0000000000662ee0 R14: 0000000000000000 R15: 0000000000000000
[   71.606651] Modules linked in: sch_cbq cls_tcindex sch_dsmark xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_coni
[   71.685425]  libahci i2c_algo_bit i2c_core i40e libata dca mdio megaraid_sas dm_mirror dm_region_hash dm_log dm_mod
[   71.697075] CR2: 0000000000000004
[   71.700792] ---[ end trace f604eb1acacd978b ]---

Reproducer:
tc qdisc add dev lo handle 1:0 root dsmark indices 64 set_tc_index
tc filter add dev lo parent 1:0 protocol ip prio 1 tcindex mask 0xfc shift 2
tc qdisc add dev lo parent 1:0 handle 2:0 cbq bandwidth 10Mbit cell 8 avpkt 1000 mpu 64
tc class add dev lo parent 2:0 classid 2:1 cbq bandwidth 10Mbit rate 1500Kbit avpkt 1000 prio 1 bounded isolated allot 1514 weight 1 maxburst 10
tc filter add dev lo parent 2:0 protocol ip prio 1 handle 0x2e tcindex classid 2:1 pass_on
tc qdisc add dev lo parent 2:1 pfifo limit 5
tc qdisc del dev lo root

This is because in tcindex_set_parms, when there is no old_r, we set new
exts to cr.exts. And we didn't set it to filter when r == &new_filter_result.

Then in tcindex_delete() -> tcf_exts_get_net(), we will get NULL pointer
dereference as we didn't init exts.

Fix it by moving tcf_exts_change() after "if (old_r && old_r != r)" check.
Then we don't need "cr" as there is no errout after that.

Fixes: bf63ac73b3 ("net_sched: fix an oops in tcindex filter")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 19:37:42 -07:00
Linus Torvalds
de5d1b39ea Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking/atomics update from Thomas Gleixner:
 "The locking, atomics and memory model brains delivered:

   - A larger update to the atomics code which reworks the ordering
     barriers, consolidates the atomic primitives, provides the new
     atomic64_fetch_add_unless() primitive and cleans up the include
     hell.

   - Simplify cmpxchg() instrumentation and add instrumentation for
     xchg() and cmpxchg_double().

   - Updates to the memory model and documentation"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (48 commits)
  locking/atomics: Rework ordering barriers
  locking/atomics: Instrument cmpxchg_double*()
  locking/atomics: Instrument xchg()
  locking/atomics: Simplify cmpxchg() instrumentation
  locking/atomics/x86: Reduce arch_cmpxchg64*() instrumentation
  tools/memory-model: Rename litmus tests to comply to norm7
  tools/memory-model/Documentation: Fix typo, smb->smp
  sched/Documentation: Update wake_up() & co. memory-barrier guarantees
  locking/spinlock, sched/core: Clarify requirements for smp_mb__after_spinlock()
  sched/core: Use smp_mb() in wake_woken_function()
  tools/memory-model: Add informal LKMM documentation to MAINTAINERS
  locking/atomics/Documentation: Describe atomic_set() as a write operation
  tools/memory-model: Make scripts executable
  tools/memory-model: Remove ACCESS_ONCE() from model
  tools/memory-model: Remove ACCESS_ONCE() from recipes
  locking/memory-barriers.txt/kokr: Update Korean translation to fix broken DMA vs. MMIO ordering example
  MAINTAINERS: Add Daniel Lustig as an LKMM reviewer
  tools/memory-model: Fix ISA2+pooncelock+pooncelock+pombonce name
  tools/memory-model: Add litmus test for full multicopy atomicity
  locking/refcount: Always allow checked forms
  ...
2018-08-13 12:23:39 -07:00
Vlad Buslov
42c625a486 net: sched: act_ife: disable bh when taking ife_mod_lock
Lockdep reports deadlock for following locking scenario in ife action:

Task one:
1) Executes ife action update.
2) Takes tcfa_lock.
3) Waits on ife_mod_lock which is already taken by task two.

Task two:

1) Executes any path that obtains ife_mod_lock without disabling bh (any
path that takes ife_mod_lock while holding tcfa_lock has bh disabled) like
loading a meta module, or creating new action.
2) Takes ife_mod_lock.
3) Task is preempted by rate estimator timer.
4) Timer callback waits on tcfa_lock which is taken by task one.

In described case tasks deadlock because they take same two locks in
different order. To prevent potential deadlock reported by lockdep, always
disable bh when obtaining ife_mod_lock.

Lockdep warning:

[  508.101192] =====================================================
[  508.107708] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
[  508.114728] 4.18.0-rc8+ #646 Not tainted
[  508.119050] -----------------------------------------------------
[  508.125559] tc/5460 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire:
[  508.132025] 000000005a938c68 (ife_mod_lock){++++}, at: find_ife_oplist+0x1e/0xc0 [act_ife]
[  508.140996]
               and this task is already holding:
[  508.147548] 00000000d46f6c56 (&(&p->tcfa_lock)->rlock){+.-.}, at: tcf_ife_init+0x6ae/0xf40 [act_ife]
[  508.157371] which would create a new lock dependency:
[  508.162828]  (&(&p->tcfa_lock)->rlock){+.-.} -> (ife_mod_lock){++++}
[  508.169572]
               but this new dependency connects a SOFTIRQ-irq-safe lock:
[  508.178197]  (&(&p->tcfa_lock)->rlock){+.-.}
[  508.178201]
               ... which became SOFTIRQ-irq-safe at:
[  508.189771]   _raw_spin_lock+0x2c/0x40
[  508.193906]   est_fetch_counters+0x41/0xb0
[  508.198391]   est_timer+0x83/0x3c0
[  508.202180]   call_timer_fn+0x16a/0x5d0
[  508.206400]   run_timer_softirq+0x399/0x920
[  508.210967]   __do_softirq+0x157/0x97d
[  508.215102]   irq_exit+0x152/0x1c0
[  508.218888]   smp_apic_timer_interrupt+0xc0/0x4e0
[  508.223976]   apic_timer_interrupt+0xf/0x20
[  508.228540]   cpuidle_enter_state+0xf8/0x5d0
[  508.233198]   do_idle+0x28a/0x350
[  508.236881]   cpu_startup_entry+0xc7/0xe0
[  508.241296]   start_secondary+0x2e8/0x3f0
[  508.245678]   secondary_startup_64+0xa5/0xb0
[  508.250347]
               to a SOFTIRQ-irq-unsafe lock:  (ife_mod_lock){++++}
[  508.256531]
               ... which became SOFTIRQ-irq-unsafe at:
[  508.267279] ...
[  508.267283]   _raw_write_lock+0x2c/0x40
[  508.273653]   register_ife_op+0x118/0x2c0 [act_ife]
[  508.278926]   do_one_initcall+0xf7/0x4d9
[  508.283214]   do_init_module+0x18b/0x44e
[  508.287521]   load_module+0x4167/0x5730
[  508.291739]   __do_sys_finit_module+0x16d/0x1a0
[  508.296654]   do_syscall_64+0x7a/0x3f0
[  508.300788]   entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  508.306302]
               other info that might help us debug this:

[  508.315286]  Possible interrupt unsafe locking scenario:

[  508.322771]        CPU0                    CPU1
[  508.327681]        ----                    ----
[  508.332604]   lock(ife_mod_lock);
[  508.336300]                                local_irq_disable();
[  508.342608]                                lock(&(&p->tcfa_lock)->rlock);
[  508.349793]                                lock(ife_mod_lock);
[  508.355990]   <Interrupt>
[  508.358974]     lock(&(&p->tcfa_lock)->rlock);
[  508.363803]
                *** DEADLOCK ***

[  508.370715] 2 locks held by tc/5460:
[  508.374680]  #0: 00000000e27e4fa4 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x583/0x7b0
[  508.383366]  #1: 00000000d46f6c56 (&(&p->tcfa_lock)->rlock){+.-.}, at: tcf_ife_init+0x6ae/0xf40 [act_ife]
[  508.393648]
               the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
[  508.403505] -> (&(&p->tcfa_lock)->rlock){+.-.} ops: 1001553 {
[  508.409646]    HARDIRQ-ON-W at:
[  508.413136]                     _raw_spin_lock_bh+0x34/0x40
[  508.419059]                     gnet_stats_start_copy_compat+0xa2/0x230
[  508.426021]                     gnet_stats_start_copy+0x16/0x20
[  508.432333]                     tcf_action_copy_stats+0x95/0x1d0
[  508.438735]                     tcf_action_dump_1+0xb0/0x4e0
[  508.444795]                     tcf_action_dump+0xca/0x200
[  508.450673]                     tcf_exts_dump+0xd9/0x320
[  508.456392]                     fl_dump+0x1b7/0x4a0 [cls_flower]
[  508.462798]                     tcf_fill_node+0x380/0x530
[  508.468601]                     tfilter_notify+0xdf/0x1c0
[  508.474404]                     tc_new_tfilter+0x84a/0xc90
[  508.480270]                     rtnetlink_rcv_msg+0x5bd/0x7b0
[  508.486419]                     netlink_rcv_skb+0x184/0x220
[  508.492394]                     netlink_unicast+0x31b/0x460
[  508.507411]                     netlink_sendmsg+0x3fb/0x840
[  508.513390]                     sock_sendmsg+0x7b/0xd0
[  508.518907]                     ___sys_sendmsg+0x4c6/0x610
[  508.524797]                     __sys_sendmsg+0xd7/0x150
[  508.530510]                     do_syscall_64+0x7a/0x3f0
[  508.536201]                     entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  508.543301]    IN-SOFTIRQ-W at:
[  508.546834]                     _raw_spin_lock+0x2c/0x40
[  508.552522]                     est_fetch_counters+0x41/0xb0
[  508.558571]                     est_timer+0x83/0x3c0
[  508.563912]                     call_timer_fn+0x16a/0x5d0
[  508.569699]                     run_timer_softirq+0x399/0x920
[  508.575840]                     __do_softirq+0x157/0x97d
[  508.581538]                     irq_exit+0x152/0x1c0
[  508.586882]                     smp_apic_timer_interrupt+0xc0/0x4e0
[  508.593533]                     apic_timer_interrupt+0xf/0x20
[  508.599686]                     cpuidle_enter_state+0xf8/0x5d0
[  508.605895]                     do_idle+0x28a/0x350
[  508.611147]                     cpu_startup_entry+0xc7/0xe0
[  508.617097]                     start_secondary+0x2e8/0x3f0
[  508.623029]                     secondary_startup_64+0xa5/0xb0
[  508.629245]    INITIAL USE at:
[  508.632686]                    _raw_spin_lock_bh+0x34/0x40
[  508.638557]                    gnet_stats_start_copy_compat+0xa2/0x230
[  508.645491]                    gnet_stats_start_copy+0x16/0x20
[  508.651719]                    tcf_action_copy_stats+0x95/0x1d0
[  508.657992]                    tcf_action_dump_1+0xb0/0x4e0
[  508.663937]                    tcf_action_dump+0xca/0x200
[  508.669716]                    tcf_exts_dump+0xd9/0x320
[  508.675337]                    fl_dump+0x1b7/0x4a0 [cls_flower]
[  508.681650]                    tcf_fill_node+0x380/0x530
[  508.687366]                    tfilter_notify+0xdf/0x1c0
[  508.693031]                    tc_new_tfilter+0x84a/0xc90
[  508.698820]                    rtnetlink_rcv_msg+0x5bd/0x7b0
[  508.704869]                    netlink_rcv_skb+0x184/0x220
[  508.710758]                    netlink_unicast+0x31b/0x460
[  508.716627]                    netlink_sendmsg+0x3fb/0x840
[  508.722510]                    sock_sendmsg+0x7b/0xd0
[  508.727931]                    ___sys_sendmsg+0x4c6/0x610
[  508.733729]                    __sys_sendmsg+0xd7/0x150
[  508.739346]                    do_syscall_64	+0x7a/0x3f0
[  508.744943]                    entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  508.751930]  }
[  508.753964]  ... key      at: [<ffffffff916b3e20>] __key.61145+0x0/0x40
[  508.760946]  ... acquired at:
[  508.764294]    _raw_read_lock+0x2f/0x40
[  508.768513]    find_ife_oplist+0x1e/0xc0 [act_ife]
[  508.773692]    tcf_ife_init+0x82f/0xf40 [act_ife]
[  508.778785]    tcf_action_init_1+0x510/0x750
[  508.783468]    tcf_action_init+0x1e8/0x340
[  508.787938]    tcf_action_add+0xc5/0x240
[  508.792241]    tc_ctl_action+0x203/0x2a0
[  508.796550]    rtnetlink_rcv_msg+0x5bd/0x7b0
[  508.801200]    netlink_rcv_skb+0x184/0x220
[  508.805674]    netlink_unicast+0x31b/0x460
[  508.810129]    netlink_sendmsg+0x3fb/0x840
[  508.814611]    sock_sendmsg+0x7b/0xd0
[  508.818665]    ___sys_sendmsg+0x4c6/0x610
[  508.823029]    __sys_sendmsg+0xd7/0x150
[  508.827246]    do_syscall_64+0x7a/0x3f0
[  508.831483]    entry_SYSCALL_64_after_hwframe+0x49/0xbe

               the dependencies between the lock to be acquired
[  508.838945]  and SOFTIRQ-irq-unsafe lock:
[  508.851177] -> (ife_mod_lock){++++} ops: 95 {
[  508.855920]    HARDIRQ-ON-W at:
[  508.859478]                     _raw_write_lock+0x2c/0x40
[  508.865264]                     register_ife_op+0x118/0x2c0 [act_ife]
[  508.872071]                     do_one_initcall+0xf7/0x4d9
[  508.877947]                     do_init_module+0x18b/0x44e
[  508.883819]                     load_module+0x4167/0x5730
[  508.889595]                     __do_sys_finit_module+0x16d/0x1a0
[  508.896043]                     do_syscall_64+0x7a/0x3f0
[  508.901734]                     entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  508.908827]    HARDIRQ-ON-R at:
[  508.912359]                     _raw_read_lock+0x2f/0x40
[  508.918043]                     find_ife_oplist+0x1e/0xc0 [act_ife]
[  508.924692]                     tcf_ife_init+0x82f/0xf40 [act_ife]
[  508.931252]                     tcf_action_init_1+0x510/0x750
[  508.937393]                     tcf_action_init+0x1e8/0x340
[  508.943366]                     tcf_action_add+0xc5/0x240
[  508.949130]                     tc_ctl_action+0x203/0x2a0
[  508.954922]                     rtnetlink_rcv_msg+0x5bd/0x7b0
[  508.961024]                     netlink_rcv_skb+0x184/0x220
[  508.966970]                     netlink_unicast+0x31b/0x460
[  508.972915]                     netlink_sendmsg+0x3fb/0x840
[  508.978859]                     sock_sendmsg+0x7b/0xd0
[  508.984400]                     ___sys_sendmsg+0x4c6/0x610
[  508.990264]                     __sys_sendmsg+0xd7/0x150
[  508.995952]                     do_syscall_64+0x7a/0x3f0
[  509.001643]                     entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  509.008722]    SOFTIRQ-ON-W at:\
[  509.012242]                     _raw_write_lock+0x2c/0x40
[  509.018013]                     register_ife_op+0x118/0x2c0 [act_ife]
[  509.024841]                     do_one_initcall+0xf7/0x4d9
[  509.030720]                     do_init_module+0x18b/0x44e
[  509.036604]                     load_module+0x4167/0x5730
[  509.042397]                     __do_sys_finit_module+0x16d/0x1a0
[  509.048865]                     do_syscall_64+0x7a/0x3f0
[  509.054551]                     entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  509.061636]    SOFTIRQ-ON-R at:
[  509.065145]                     _raw_read_lock+0x2f/0x40
[  509.070854]                     find_ife_oplist+0x1e/0xc0 [act_ife]
[  509.077515]                     tcf_ife_init+0x82f/0xf40 [act_ife]
[  509.084051]                     tcf_action_init_1+0x510/0x750
[  509.090172]                     tcf_action_init+0x1e8/0x340
[  509.096124]                     tcf_action_add+0xc5/0x240
[  509.101891]                     tc_ctl_action+0x203/0x2a0
[  509.107671]                     rtnetlink_rcv_msg+0x5bd/0x7b0
[  509.113811]                     netlink_rcv_skb+0x184/0x220
[  509.119768]                     netlink_unicast+0x31b/0x460
[  509.125716]                     netlink_sendmsg+0x3fb/0x840
[  509.131668]                     sock_sendmsg+0x7b/0xd0
[  509.137167]                     ___sys_sendmsg+0x4c6/0x610
[  509.143010]                     __sys_sendmsg+0xd7/0x150
[  509.148718]                     do_syscall_64+0x7a/0x3f0
[  509.154443]                     entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  509.161533]    INITIAL USE at:
[  509.164956]                    _raw_read_lock+0x2f/0x40
[  509.170574]                    find_ife_oplist+0x1e/0xc0 [act_ife]
[  509.177134]                    tcf_ife_init+0x82f/0xf40 [act_ife]
[  509.183619]                    tcf_action_init_1+0x510/0x750
[  509.189674]                    tcf_action_init+0x1e8/0x340
[  509.195534]                    tcf_action_add+0xc5/0x240
[  509.201229]                    tc_ctl_action+0x203/0x2a0
[  509.206920]                    rtnetlink_rcv_msg+0x5bd/0x7b0
[  509.212936]                    netlink_rcv_skb+0x184/0x220
[  509.218818]                    netlink_unicast+0x31b/0x460
[  509.224699]                    netlink_sendmsg+0x3fb/0x840
[  509.230581]                    sock_sendmsg+0x7b/0xd0
[  509.235984]                    ___sys_sendmsg+0x4c6/0x610
[  509.241791]                    __sys_sendmsg+0xd7/0x150
[  509.247425]                    do_syscall_64+0x7a/0x3f0
[  509.253007]                    entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  509.259975]  }
[  509.261998]  ... key      at: [<ffffffffc1554258>] ife_mod_lock+0x18/0xffffffffffff8dc0 [act_ife]
[  509.271569]  ... acquired at:
[  509.274912]    _raw_read_lock+0x2f/0x40
[  509.279134]    find_ife_oplist+0x1e/0xc0 [act_ife]
[  509.284324]    tcf_ife_init+0x82f/0xf40 [act_ife]
[  509.289425]    tcf_action_init_1+0x510/0x750
[  509.294068]    tcf_action_init+0x1e8/0x340
[  509.298553]    tcf_action_add+0xc5/0x240
[  509.302854]    tc_ctl_action+0x203/0x2a0
[  509.307153]    rtnetlink_rcv_msg+0x5bd/0x7b0
[  509.311805]    netlink_rcv_skb+0x184/0x220
[  509.316282]    netlink_unicast+0x31b/0x460
[  509.320769]    netlink_sendmsg+0x3fb/0x840
[  509.325248]    sock_sendmsg+0x7b/0xd0
[  509.329290]    ___sys_sendmsg+0x4c6/0x610
[  509.333687]    __sys_sendmsg+0xd7/0x150
[  509.337902]    do_syscall_64+0x7a/0x3f0
[  509.342116]    entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  509.349601]
               stack backtrace:
[  509.354663] CPU: 6 PID: 5460 Comm: tc Not tainted 4.18.0-rc8+ #646
[  509.361216] Hardware name: Supermicro SYS-2028TP-DECR/X10DRT-P, BIOS 2.0b 03/30/2017

Fixes: ef6980b6be ("introduce IFE action")
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 11:45:06 -07:00
David S. Miller
c1617fb4c5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:

====================
pull-request: bpf-next 2018-08-13

The following pull-request contains BPF updates for your *net-next* tree.

The main changes are:

1) Add driver XDP support for veth. This can be used in conjunction with
   redirect of another XDP program e.g. sitting on NIC so the xdp_frame
   can be forwarded to the peer veth directly without modification,
   from Toshiaki.

2) Add a new BPF map type REUSEPORT_SOCKARRAY and prog type SK_REUSEPORT
   in order to provide more control and visibility on where a SO_REUSEPORT
   sk should be located, and the latter enables to directly select a sk
   from the bpf map. This also enables map-in-map for application migration
   use cases, from Martin.

3) Add a new BPF helper bpf_skb_ancestor_cgroup_id() that returns the id
   of cgroup v2 that is the ancestor of the cgroup associated with the
   skb at the ancestor_level, from Andrey.

4) Implement BPF fs map pretty-print support based on BTF data for regular
   hash table and LRU map, from Yonghong.

5) Decouple the ability to attach BTF for a map from the key and value
   pretty-printer in BPF fs, and enable further support of BTF for maps for
   percpu and LPM trie, from Daniel.

6) Implement a better BPF sample of using XDP's CPU redirect feature for
   load balancing SKB processing to remote CPU. The sample implements the
   same XDP load balancing as Suricata does which is symmetric hash based
   on IP and L4 protocol, from Jesper.

7) Revert adding NULL pointer check with WARN_ON_ONCE() in __xdp_return()'s
   critical path as it is ensured that the allocator is present, from Björn.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 10:07:23 -07:00
Li RongQing
71e4128620 packet: switch kvzalloc to allocate memory
The patches includes following change:

*Use modern kvzalloc()/kvfree() instead of custom allocations.

*Remove order argument for alloc_pg_vec, it can get from req.

*Remove order argument for free_pg_vec, free_pg_vec now uses
kvfree which does not need order argument.

*Remove pg_vec_order from struct packet_ring_buffer, no longer
need to save/restore 'order'

*Remove variable 'order' for packet_set_ring, it is now unused

Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 09:21:05 -07:00
Jamal Hadi Salim
7c5790c4da net: sched: act_mirred method rename for grep-ability and consistency
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 09:06:17 -07:00
Jamal Hadi Salim
8aa7f22e56 net: sched: act_vlan method rename for grep-ability and consistency
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 09:06:17 -07:00
Jamal Hadi Salim
353d2c253f net: sched: act_skbmod method rename for grep-ability and consistency
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 09:06:17 -07:00
Jamal Hadi Salim
45da1dac61 net: sched: act_skbedit method rename for grep-ability and consistency
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-13 09:06:17 -07:00