Linus Lüssing 54e22f265e batman-adv: fix TT sync flag inconsistencies ... This patch fixes an issue in the translation table code potentially leading to a TT Request + Response storm. The issue may occur for nodes involving BLA and an inconsistent configuration of the batman-adv AP isolation feature. However, since the new multicast optimizations, a single, malformed packet may lead to a mesh-wide, persistent Denial-of-Service, too. The issue occurs because nodes are currently OR-ing the TT sync flags of all originators announcing a specific MAC address via the translation table. When an intermediate node now receives a TT Request and wants to answer this on behalf of the destination node, then this intermediate node now responds with an altered flag field and broken CRC. The next OGM of the real destination will lead to a CRC mismatch and triggering a TT Request and Response again. Furthermore, the OR-ing is currently never undone as long as at least one originator announcing the according MAC address remains, leading to the potential persistency of this issue. This patch fixes this issue by storing the flags used in the CRC calculation on a a per TT orig entry basis to be able to respond with the correct, original flags in an intermediate TT Response for one thing. And to be able to correctly unset sync flags once all nodes announcing a sync flag vanish for another. Fixes: e9c00136a4 ("batman-adv: fix tt_global_entries flags update") Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Acked-by: Antonio Quartulli <a@unstable.cc> [sw: typo in commit message] Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>		2017-07-31 11:17:38 +02:00
..
6lowpan	6lowpan: Don't set IFF_NO_QUEUE	2017-04-12 22:02:40 +02:00
9p	Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-07-15 12:00:42 -07:00
802	net: introduce __skb_put_[zero, data, u8]	2017-06-20 13:30:14 -04:00
8021q	net: add netlink_ext_ack argument to rtnl_link_ops.validate	2017-06-26 23:13:22 -04:00
appletalk	networking: make skb_push & __skb_push return void pointers	2017-06-16 11:48:40 -04:00
atm	net, atm: convert eg_cache_entry.use from atomic_t to refcount_t	2017-07-04 22:35:16 +01:00
ax25	net, ax25: convert ax25_cb.refcount from atomic_t to refcount_t	2017-07-04 22:35:19 +01:00
batman-adv	batman-adv: fix TT sync flag inconsistencies	2017-07-31 11:17:38 +02:00
bluetooth	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2017-07-05 12:31:59 -07:00
bpf	bpf: Align packet data properly in program testing framework.	2017-05-02 11:46:28 -04:00
bridge	bridge: mdb: fix leak on complete_info ptr on fail path	2017-07-11 20:01:39 -07:00
caif	net: convert sock.sk_wmem_alloc from atomic_t to refcount_t	2017-07-01 07:39:08 -07:00
can	networking: introduce and use skb_put_data()	2017-06-16 11:48:37 -04:00
ceph	Add wait_for_random_bytes() and get_random_*_wait() functions so that	2017-07-15 12:44:02 -07:00
core	Add wait_for_random_bytes() and get_random_*_wait() functions so that	2017-07-15 12:44:02 -07:00
dcb	dcb: enforce minimum length on IEEE_APPS attribute	2017-05-21 13:42:33 -04:00
dccp	net: convert sk_buff.users from atomic_t to refcount_t	2017-07-01 07:39:07 -07:00
decnet	net, decnet: convert dn_fib_info.fib_clntref from atomic_t to refcount_t	2017-07-04 22:35:15 +01:00
dns_resolver	Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-03 10:16:38 -08:00
dsa	net: manual clean code which call skb_put_[data:zero]	2017-06-20 13:30:15 -04:00
ethernet	networking: make skb_push & __skb_push return void pointers	2017-06-16 11:48:40 -04:00
hsr	net: add netlink_ext_ack argument to rtnl_link_ops.newlink	2017-06-26 23:13:21 -04:00
ieee802154	net: add netlink_ext_ack argument to rtnl_link_ops.validate	2017-06-26 23:13:22 -04:00
ife
ipv4	Add wait_for_random_bytes() and get_random_*_wait() functions so that	2017-07-15 12:44:02 -07:00
ipv6	net: ipv6: Compare lwstate in detecting duplicate nexthops	2017-07-06 10:48:01 +01:00
ipx	net, ipx: convert ipx_route.refcnt from atomic_t to refcount_t	2017-07-04 22:35:17 +01:00
irda	Merge branch 'work.memdup_user' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-07-05 16:05:24 -07:00
iucv	iucv: Convert sk_wmem_alloc accesses to refcount_t.	2017-07-03 02:31:22 -07:00
kcm	net: convert sock.sk_wmem_alloc from atomic_t to refcount_t	2017-07-01 07:39:08 -07:00
key	net, xfrm: convert xfrm_policy.refcnt from atomic_t to refcount_t	2017-07-04 22:35:18 +01:00
l2tp	net, l2tp: convert l2tp_session.ref_count from atomic_t to refcount_t	2017-07-04 22:35:15 +01:00
l3mdev
lapb	net, lapb: convert lapb_cb.refcnt from atomic_t to refcount_t	2017-07-04 22:35:16 +01:00
llc	net, llc: convert llc_sap.refcnt from atomic_t to refcount_t	2017-07-04 22:35:15 +01:00
mac80211	net: manual clean code which call skb_put_[data:zero]	2017-06-20 13:30:15 -04:00
mac802154	net: Fix inconsistent teardown and release of private netdev state.	2017-06-07 15:53:24 -04:00
mpls	mpls: fix uninitialized in_label var warning in mpls_getroute	2017-07-08 11:26:41 +01:00
ncsi	networking: make skb_push & __skb_push return void pointers	2017-06-16 11:48:40 -04:00
netfilter	net/netfilter/x_tables.c: use kvmalloc() in xt_alloc_table_info()	2017-07-12 16:26:02 -07:00
netlabel	netlink: pass extended ACK struct to parsing functions	2017-04-13 13:58:22 -04:00
netlink	net: convert sock.sk_refcnt from atomic_t to refcount_t	2017-07-01 07:39:08 -07:00
netrom	net, netrom: convert nr_node.refcount from atomic_t to refcount_t	2017-07-04 22:35:17 +01:00
nfc	NFC: Add sockaddr length checks before accessing sa_family in bind handlers	2017-06-23 00:38:31 +02:00
openvswitch	openvswitch: fix mis-ordered comment lines for ovs_skb_cb	2017-07-03 05:54:00 -07:00
packet	net: convert packet_fanout.sk_ref from atomic_t to refcount_t	2017-07-01 07:39:09 -07:00
phonet	net: convert sock.sk_refcnt from atomic_t to refcount_t	2017-07-01 07:39:08 -07:00
psample	networking: make skb_put & friends return void pointers	2017-06-16 11:48:39 -04:00
qrtr	networking: make skb_put & friends return void pointers	2017-06-16 11:48:39 -04:00
rds	rds: tcp: use sock_create_lite() to create the accept socket	2017-07-08 11:16:16 +01:00
rfkill	net: rfkill: gpio: Switch to devm_acpi_dev_add_driver_gpios()	2017-06-13 11:07:51 +02:00
rose	net: Work around lockdep limitation in sockets that use sockets	2017-03-09 18:23:27 -08:00
rxrpc	net: convert sock.sk_refcnt from atomic_t to refcount_t	2017-07-01 07:39:08 -07:00
sched	mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic	2017-07-12 16:26:03 -07:00
sctp	sctp: set the value of flowi6_oif to sk_bound_dev_if to make sctp_v6_get_dst to find the correct route entry.	2017-07-06 11:39:54 +01:00
smc	net/smc: Add warning about remote memory exposure	2017-05-16 14:49:43 -04:00
strparser	strparser: destroy workqueue on module exit	2017-03-03 20:43:26 -08:00
sunrpc	NFS client updates for Linux 4.13	2017-07-13 14:35:37 -07:00
switchdev	net: switchdev: Change notifier chain to be atomic	2017-06-08 14:16:24 -04:00
tipc	net: convert sock.sk_refcnt from atomic_t to refcount_t	2017-07-01 07:39:08 -07:00
tls	TLS: Fix length check in do_tls_getsockopt_tx()	2017-07-06 10:58:19 +01:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2017-07-05 12:31:59 -07:00
vmw_vsock	net: manual clean code which call skb_put_[data:zero]	2017-06-20 13:30:15 -04:00
wimax
wireless	netlink validation fixes for nl80211	2017-07-07 11:35:55 +01:00
x25	net, x25: convert x25_neigh.refcnt from atomic_t to refcount_t	2017-07-04 22:35:18 +01:00
xfrm	net, xfrm: convert sec_path.refcnt from atomic_t to refcount_t	2017-07-04 22:35:18 +01:00
compat.c	get_compat_bpf_fprog(): don't copyin field-by-field	2017-07-04 13:14:34 -04:00
Kconfig	tls: kernel TLS support	2017-06-15 12:12:40 -04:00
Makefile	tls: kernel TLS support	2017-06-15 12:12:40 -04:00
socket.c	Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-07-15 11:06:17 -07:00
sysctl_net.c	sysctl: Remove dead register_sysctl_root	2017-04-16 23:42:49 -05:00