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linux/net/ipv4
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Yuchung Cheng b451e5d24b tcp: avoid fragmenting peculiar skbs in SACK 
This patch fixes a bug in splitting an SKB during SACK
processing. Specifically if an skb contains multiple
packets and is only partially sacked in the higher sequences,
tcp_match_sack_to_skb() splits the skb and marks the second fragment
as SACKed.

The current code further attempts rounding up the first fragment
to MSS boundaries. But it misses a boundary condition when the
rounded-up fragment size (pkt_len) is exactly skb size.  Spliting
such an skb is pointless and causses a kernel warning and aborts
the SACK processing. This patch universally checks such over-split
before calling tcp_fragment to prevent these unnecessary warnings.

Fixes: adb92db857 ("tcp: Make SACK code to split only at mss boundaries")
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-11 21:35:20 -04:00
..
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2017-05-01 10:47:53 -04:00
af_inet.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-05-02 16:40:27 -07:00
ah4.c IPsec: do not ignore crypto err in ah4 input 2017-01-16 12:57:48 +01:00
arp.c neighbour: fix nlmsg_pid in notifications 2017-03-22 10:48:49 -07:00
cipso_ipv4.c netlabel: out of bound access in cipso_v4_validate() 2017-02-04 19:44:22 -05:00
datagram.c
devinet.c net: rtnetlink: plumb extended ack to doit function 2017-04-17 15:35:38 -04:00
esp4_offload.c esp4/6: Fix GSO path for non-GSO SW-crypto packets 2017-04-19 07:48:57 +02:00
esp4.c net/esp4: Fix invalid esph pointer crash 2017-05-01 14:58:50 -04:00
fib_frontend.c net: fib: Decrease one unnecessary rt cache flush in fib_disable_ip 2017-04-27 16:33:30 -04:00
fib_lookup.h
fib_notifier.c ipv4: fib: Remove redundant argument 2017-03-10 09:45:09 -08:00
fib_rules.c ipv4: fib_rules: Dump FIB rules when registering FIB notifier 2017-03-16 10:18:34 -07:00
fib_semantics.c net: ipv4: add support for ECMP hash policy choice 2017-03-21 15:27:19 -07:00
fib_trie.c ipv4: fib: Remove redundant argument 2017-03-10 09:45:09 -08:00
fou.c
gre_demux.c
gre_offload.c
icmp.c net: ipv4: add support for ECMP hash policy choice 2017-03-21 15:27:19 -07:00
igmp.c igmp, mld: Fix memory leak in igmpv3/mld_del_delrec() 2017-02-09 16:43:45 -05:00
inet_connection_sock.c dccp/tcp: do not inherit mc_list from parent 2017-05-09 15:17:49 -04:00
inet_diag.c tcp: remove early retransmit 2017-01-13 22:37:16 -05:00
inet_fragment.c
inet_hashtables.c treewide: use kv[mz]alloc* rather than opencoded variants 2017-05-08 17:15:13 -07:00
inet_timewait_sock.c
inetpeer.c
ip_forward.c
ip_fragment.c inet: frag: release spinlock before calling icmp_send() 2017-03-22 15:40:45 -07:00
ip_gre.c ip_tunnel: Allow policy-based routing through tunnels 2017-04-21 13:21:31 -04:00
ip_input.c net: Add sysctl to toggle early demux for tcp and udp 2017-03-24 13:17:07 -07:00
ip_options.c
ip_output.c udp: avoid ufo handling on IP payload compression packets 2017-03-09 18:28:42 -08:00
ip_sockglue.c ipv4: get rid of ip_ra_lock 2017-04-30 22:44:04 -04:00
ip_tunnel_core.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
ip_tunnel.c ip_tunnel: Allow policy-based routing through tunnels 2017-04-21 13:21:31 -04:00
ip_vti.c vti: check nla_put_* return value 2017-05-08 15:10:31 -04:00
ipcomp.c
ipconfig.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-04-06 08:24:51 -07:00
ipip.c ip_tunnel: Allow policy-based routing through tunnels 2017-04-21 13:21:31 -04:00
ipmr.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-04-20 10:35:33 -04:00
Kconfig Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2017-02-16 21:25:49 -05:00
Makefile ipv4: fib: Move FIB notification code to a separate file 2017-03-10 09:45:09 -08:00
netfilter.c netfilter: use skb_to_full_sk in ip_route_me_harder 2017-02-28 12:49:36 +01:00
ping.c ping: implement proper locking 2017-03-24 20:50:28 -07:00
proc.c net/tcp_fastopen: Add snmp counter for blackhole detection 2017-04-24 14:27:17 -04:00
protocol.c net: Add sysctl to toggle early demux for tcp and udp 2017-03-24 13:17:07 -07:00
raw_diag.c
raw.c ipv4, ipv6: ensure raw socket message is big enough to hold an IP header 2017-05-04 11:02:46 -04:00
route.c Revert "ipv4: restore rt->fi for reference counting" 2017-05-08 22:35:32 -04:00
syncookies.c tcp: randomize timestamps on syncookies 2017-05-05 12:00:11 -04:00
sysctl_net_ipv4.c net/tcp_fastopen: Disable active side TFO in certain scenarios 2017-04-24 14:27:17 -04:00
tcp_bbr.c
tcp_bic.c
tcp_cdg.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
tcp_cong.c tcp: memset ca_priv data to 0 properly 2017-04-26 14:58:32 -04:00
tcp_cubic.c tcp_cubic: fix typo in module param description 2017-04-20 16:16:44 -04:00
tcp_dctcp.c
tcp_diag.c
tcp_fastopen.c net/tcp_fastopen: Add snmp counter for blackhole detection 2017-04-24 14:27:17 -04:00
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c tcp: avoid fragmenting peculiar skbs in SACK 2017-05-11 21:35:20 -04:00
tcp_ipv4.c tcp: randomize timestamps on syncookies 2017-05-05 12:00:11 -04:00
tcp_lp.c tcp: fix wraparound issue in tcp_lp 2017-05-02 15:07:02 -04:00
tcp_metrics.c treewide: use kv[mz]alloc* rather than opencoded variants 2017-05-08 17:15:13 -07:00
tcp_minisocks.c tcp: do not inherit fastopen_req from parent 2017-05-04 11:00:04 -04:00
tcp_nv.c
tcp_offload.c
tcp_output.c tcp: make congestion control optionally skip slow start after idle 2017-05-08 14:37:07 -04:00
tcp_probe.c tcp: Revert "tcp: tcp_probe: use spin_lock_bh()" 2017-02-21 13:26:03 -05:00
tcp_rate.c tcp: do not pass timestamp to tcp_rate_gen() 2017-04-26 14:44:38 -04:00
tcp_recovery.c tcp: tcp_rack_reo_timeout() must update tp->tcp_mstamp 2017-04-27 11:46:15 -04:00
tcp_scalable.c
tcp_timer.c net/tcp_fastopen: Remove mss check in tcp_write_timeout() 2017-04-24 14:27:17 -04:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c tcp_westwood: fix tcp_westwood_info() style mistakes 2017-03-16 20:23:28 -07:00
tcp_yeah.c
tcp.c tcp: fix access to sk->sk_state in tcp_poll() 2017-04-30 22:24:16 -04:00
tunnel4.c
udp_diag.c
udp_impl.h
udp_offload.c udp: disable inner UDP checksum offloads in IPsec case 2017-04-24 13:48:54 -04:00
udp_tunnel.c
udp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-02-07 16:29:30 -05:00
udplite.c
xfrm4_input.c esp: Add a software GRO codepath 2017-02-15 11:04:11 +01:00
xfrm4_mode_beet.c
xfrm4_mode_transport.c xfrm: Add encapsulation header offsets while SKB is not encrypted 2017-04-14 10:07:39 +02:00
xfrm4_mode_tunnel.c xfrm: Add encapsulation header offsets while SKB is not encrypted 2017-04-14 10:07:39 +02:00
xfrm4_output.c xfrm: Add an IPsec hardware offloading API 2017-04-14 10:06:10 +02:00
xfrm4_policy.c xfrm: policy: make policy backend const 2017-02-09 10:22:19 +01:00
xfrm4_protocol.c xfrm: input: constify xfrm_input_afinfo 2017-02-09 10:22:17 +01:00
xfrm4_state.c
xfrm4_tunnel.c