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Eric Dumazet 3fc06f6d14 wifi: cfg80211: restrict NL80211_ATTR_TXQ_QUANTUM values 
[ Upstream commit d1cba2ea81 ]

syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM
to 2^31.

We had a similar issue in sch_fq, fixed with commit
d9e15a2733 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM")

watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24]
Modules linked in:
irq event stamp: 131135
 hardirqs last  enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline]
 hardirqs last  enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95
 hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline]
 hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551
 softirqs last  enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline]
 softirqs last  enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553
 softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: mld mld_ifc_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
 pc : __list_del include/linux/list.h:195 [inline]
 pc : __list_del_entry include/linux/list.h:218 [inline]
 pc : list_move_tail include/linux/list.h:310 [inline]
 pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline]
 pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854
 lr : __list_del_entry include/linux/list.h:218 [inline]
 lr : list_move_tail include/linux/list.h:310 [inline]
 lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline]
 lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854
sp : ffff800093d36700
x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000
x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0
x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0
x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0
x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8
x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff
x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc
x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470
Call trace:
  __list_del include/linux/list.h:195 [inline]
  __list_del_entry include/linux/list.h:218 [inline]
  list_move_tail include/linux/list.h:310 [inline]
  fq_tin_dequeue include/net/fq_impl.h:112 [inline]
  ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854
  wake_tx_push_queue net/mac80211/util.c:294 [inline]
  ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315
  drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline]
  schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline]
  ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664
  ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966
  ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062
  __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338
  ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532
  __netdev_start_xmit include/linux/netdevice.h:4903 [inline]
  netdev_start_xmit include/linux/netdevice.h:4917 [inline]
  xmit_one net/core/dev.c:3531 [inline]
  dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547
  __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341
  dev_queue_xmit include/linux/netdevice.h:3091 [inline]
  neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563
  neigh_output include/net/neighbour.h:542 [inline]
  ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137
  ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222
  NF_HOOK_COND include/linux/netfilter.h:303 [inline]
  ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243
  dst_output include/net/dst.h:450 [inline]
  NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314
  mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818
  mld_send_cr net/ipv6/mcast.c:2119 [inline]
  mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650
  process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267
  process_scheduled_works kernel/workqueue.c:3348 [inline]
  worker_thread+0x938/0xef4 kernel/workqueue.c:3429
  kthread+0x288/0x310 kernel/kthread.c:388
  ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Fixes: 52539ca89f ("cfg80211: Expose TXQ stats and parameters to userspace")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20240615160800.250667-1-edumazet@google.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-19 06:00:07 +02:00
arch LoongArch: Define __ARCH_WANT_NEW_STAT in unistd.h 2024-08-19 06:00:03 +02:00
block block/mq-deadline: Fix the tag reservation code 2024-08-14 13:53:02 +02:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: aead,cipher - zeroize key buffer after use 2024-07-11 12:47:05 +02:00
Documentation smb3: fix setting SecurityFlags when encryption is required 2024-08-14 13:52:59 +02:00
drivers drm/i915/gem: Adjust vma offset for framebuffer mmap offset 2024-08-19 06:00:06 +02:00
fs binfmt_flat: Fix corruption when not offsetting data start 2024-08-19 06:00:07 +02:00
include cgroup: Move rcu_head up near the top of cgroup_root 2024-08-19 06:00:07 +02:00
init rust: SHADOW_CALL_STACK is incompatible with Rust 2024-08-11 12:35:59 +02:00
io_uring io_uring: fix io_match_task must_hold 2024-08-03 08:49:53 +02:00
ipc sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:35:51 +02:00
kernel cgroup: Make operations on the cgroup root_list RCU safe 2024-08-19 06:00:06 +02:00
lib kobject_uevent: Fix OOB access within zap_modalias_env() 2024-08-03 08:49:39 +02:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm/hugetlb: fix potential race in __update_and_free_hugetlb_folio() 2024-08-14 13:53:02 +02:00
net wifi: cfg80211: restrict NL80211_ATTR_TXQ_QUANTUM values 2024-08-19 06:00:07 +02:00
rust rust: macros: fix soundness issue in module! macro 2024-05-17 11:56:17 +02:00
samples work around gcc bugs with 'asm goto' with outputs 2024-02-23 09:12:28 +01:00
scripts kbuild: avoid build error when single DTB is turned into composite DTB 2024-08-03 08:49:48 +02:00
security apparmor: Fix null pointer deref when receiving skb during sock creation 2024-08-03 08:49:50 +02:00
sound ASoC: topology: Fix route memory corruption 2024-08-19 06:00:03 +02:00
tools selftests: mptcp: join: test both signal & subflow 2024-08-19 06:00:02 +02:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-06-27 13:46:21 +02:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: add leah to 6.1 MAINTAINERS file 2024-05-17 11:56:16 +02:00
Makefile Linux 6.1.105 2024-08-14 13:53:03 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.