Eric Dumazet 68b87a2b4a tcp: take care of truncations done by sk_filter() ... With syzkaller help, Marco Grassi found a bug in TCP stack, crashing in tcp_collapse() Root cause is that sk_filter() can truncate the incoming skb, but TCP stack was not really expecting this to happen. It probably was expecting a simple DROP or ACCEPT behavior. We first need to make sure no part of TCP header could be removed. Then we need to adjust TCP_SKB_CB(skb)->end_seq Many thanks to syzkaller team and Marco for giving us a reproducer. CRs-Fixed: 1089895 Change-Id: I84185558fa6e80b13d7d0078bda9d75143680941 Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Marco Grassi <marco.gra@gmail.com> Reported-by: Vladis Dronov <vdronov@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Git-commit: ac6e780070e30e4c35bd395acfe9191e6268bdd3 Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git [subashab@codeaurora.org: resolve trivial merge conflicts] Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>		2016-11-15 14:54:51 -07:00
..
netfilter	Merge "netfilter: x_tables: validate e->target_offset early"	2016-09-30 18:23:30 -07:00
af_inet.c	Merge remote-tracking branch 'msm4.4/tmp-da9a92f' into msm-4.4	2016-10-28 10:48:35 -07:00
ah4.c	ah4: Fix error return in ah_input().	2015-08-25 13:38:50 -07:00
arp.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-10-20 06:08:27 -07:00
cipso_ipv4.c
datagram.c	net: Set sk_txhash from a random number	2015-07-29 22:44:04 -07:00
devinet.c	Merge remote-tracking branch 'msm-4.4/tmp-2bf7955' into msm-4.4	2016-07-22 16:45:32 -07:00
esp4.c	esp: Fix ESN generation under UDP encapsulation	2016-07-11 09:31:11 -07:00
fib_frontend.c	Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4	2016-10-21 18:00:55 -07:00
fib_lookup.h	ipv4: consider TOS in fib_select_default	2015-07-24 22:46:11 -07:00
fib_rules.c	net: ipv6: use common fib_default_rule_pref	2015-09-09 14:19:50 -07:00
fib_semantics.c	Revert "Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4"	2016-08-26 14:34:05 -07:00
fib_trie.c	net: initialize variables to avoid UML compilation failure	2016-03-23 21:24:21 -07:00
fou.c	fou: clean up socket with kfree_rcu	2015-12-16 19:03:02 -05:00
gre_demux.c	gre: Remove support for sharing GRE protocol hook.	2015-08-10 14:03:54 -07:00
gre_offload.c	ipv6: gre: support SIT encapsulation	2015-10-26 22:01:18 -07:00
icmp.c	Revert "ipv4/icmp: redirect messages can use the ingress daddr as source"	2015-10-14 06:01:07 -07:00
igmp.c	mld, igmp: Fix reserved tailroom calculation	2016-04-20 15:41:58 +09:00
inet_connection_sock.c	Merge remote-tracking branch 'origin/tmp-917a9a9133a6' into lsk	2016-07-12 11:40:49 -07:00
inet_diag.c	net: diag: support v4mapped sockets in inet_diag_find_one_icsk()	2016-04-07 16:49:54 +05:30
inet_fragment.c	net: fix percpu memory leaks	2015-11-02 22:47:14 -05:00
inet_hashtables.c	tcp/dccp: fix hashdance race for passive sessions	2015-10-23 05:42:21 -07:00
inet_lro.c	net lro: extend LRO to use hardware assists	2016-07-11 11:10:08 -07:00
inet_timewait_sock.c	tcp/dccp: fix timewait races in timer handling	2015-09-21 16:32:29 -07:00
inetpeer.c	net: Add helper function to compare inetpeer addresses	2015-08-28 13:32:36 -07:00
ip_forward.c	net: Pass net into dst_output and remove dst_output_okfn	2015-10-08 04:26:54 -07:00
ip_fragment.c	inet: frag: Always orphan skbs inside ip_defrag()	2016-03-03 15:07:04 -08:00
ip_gre.c	Revert "Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4"	2016-08-26 14:34:05 -07:00
ip_input.c	ipv4: Pass struct net into ip_defrag and ip_check_defrag	2015-10-12 19:44:16 -07:00
ip_options.c
ip_output.c	Merge remote-tracking branch 'msm-4.4/tmp-2bf7955' into msm-4.4	2016-07-22 16:45:32 -07:00
ip_sockglue.c	ipv4: fix memory leaks in ip_cmsg_send() callers	2016-03-03 15:07:06 -08:00
ip_tunnel.c	vxlan, gre, geneve: Set a large MTU on ovs-created tunnel devices	2016-06-24 10:18:18 -07:00
ip_tunnel_core.c	ipv4, ipv6: Pass net into ip_local_out and ip6_local_out	2015-10-08 04:27:02 -07:00
ip_vti.c	net: Pass net into dst_output and remove dst_output_okfn	2015-10-08 04:26:54 -07:00
ipcomp.c
ipconfig.c	ipconfig: send Client-identifier in DHCP requests	2015-10-18 19:23:52 -07:00
ipip.c	ipip: ioctl: Remove superfluous IP-TTL handling.	2015-12-18 16:07:59 -05:00
ipmr.c	ipmr/ip6mr: Initialize the last assert time of mfc entries.	2016-07-11 09:31:11 -07:00
Kconfig	net: diag: Support destroying TCP sockets.	2016-04-07 16:49:53 +05:30
Makefile	sysfs_net_ipv4: Add sysfs-based knobs for controlling TCP window size	2016-02-16 13:51:15 -08:00
netfilter.c	ipv4: Pass struct net into ip_route_me_harder	2015-09-29 20:21:32 +02:00
ping.c	Merge remote-tracking branch 'origin/tmp-917a9a9133a6' into lsk	2016-07-12 11:40:49 -07:00
proc.c	net: track success and failure of TCP PMTU probing	2015-07-21 22:36:33 -07:00
protocol.c
raw.c	Merge remote-tracking branch 'origin/tmp-917a9a9133a6' into lsk	2016-07-12 11:40:49 -07:00
route.c	Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4	2016-10-21 18:00:55 -07:00
syncookies.c	net: core: Support UID-based routing.	2016-02-16 13:51:37 -08:00
sysctl_net_ipv4.c	WLAN subsystem: Sysctl support for key TCP/IP parameters	2016-07-15 13:35:09 -07:00
sysfs_net_ipv4.c	sysfs_net_ipv4: Add sysfs-based knobs for controlling TCP window size	2016-02-16 13:51:15 -08:00
tcp.c	Merge remote-tracking branch 'msm4.4/tmp-da9a92f' into msm-4.4	2016-10-28 10:48:35 -07:00
tcp_bic.c
tcp_cdg.c
tcp_cong.c	tcp: remove tcp_ecn_make_synack() socket argument	2015-09-25 13:00:38 -07:00
tcp_cubic.c	tcp_cubic: do not set epoch_start in the future	2015-09-17 22:35:07 -07:00
tcp_dctcp.c	tcp: allow dctcp alpha to drop to zero	2015-10-23 02:46:52 -07:00
tcp_diag.c	net: diag: Support destroying TCP sockets.	2016-04-07 16:49:53 +05:30
tcp_fastopen.c	tcp/dccp: fix hashdance race for passive sessions	2015-10-23 05:42:21 -07:00
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c	tcp: make challenge acks less predictable	2016-10-10 13:47:41 -07:00
tcp_ipv4.c	tcp: take care of truncations done by sk_filter()	2016-11-15 14:54:51 -07:00
tcp_lp.c
tcp_memcontrol.c
tcp_metrics.c	tcp: convert cached rtt from usec to jiffies when feeding initial rto	2016-04-20 15:41:56 +09:00
tcp_minisocks.c	tcp: fix tcpi_segs_in after connection establishment	2016-04-20 15:42:00 +09:00
tcp_offload.c
tcp_output.c	Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4	2016-10-21 18:00:55 -07:00
tcp_probe.c
tcp_recovery.c	tcp: use RACK to detect losses	2015-10-21 07:00:53 -07:00
tcp_scalable.c
tcp_timer.c	WLAN subsystem: Sysctl support for key TCP/IP parameters	2016-07-15 13:35:09 -07:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c	tcp_yeah: don't set ssthresh below 2	2016-01-31 11:28:59 -08:00
tunnel4.c
udp.c	Merge remote-tracking branch 'msm4.4/tmp-da9a92f' into msm-4.4	2016-10-28 10:48:35 -07:00
udp_diag.c
udp_impl.h
udp_offload.c
udp_tunnel.c	tunnel: Clear IPCB(skb)->opt before dst_link_failure called	2016-04-20 15:41:56 +09:00
udplite.c
xfrm4_input.c	netfilter: Pass net into okfn	2015-09-17 17:18:37 -07:00
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c
xfrm4_output.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-10-24 06:54:12 -07:00
xfrm4_policy.c	net: Revert upstream changes which break routing in tunnel scenarios	2016-07-21 10:58:54 -06:00
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c