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linux/net/ipv4
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Ilpo Järvinen 45e77d3145 tcp: fix crash in tcp_xmit_retransmit_queue 
It can happen that there are no packets in queue while calling
tcp_xmit_retransmit_queue(). tcp_write_queue_head() then returns
NULL and that gets deref'ed to get sacked into a local var.

There is no work to do if no packets are outstanding so we just
exit early.

This oops was introduced by 08ebd1721a (tcp: remove tp->lost_out
guard to make joining diff nicer).

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Reported-by: Lennart Schulte <lennart.schulte@nets.rwth-aachen.de>
Tested-by: Lennart Schulte <lennart.schulte@nets.rwth-aachen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-07-19 12:43:49 -07:00
..
netfilter netfilter: xtables: stackptr should be percpu 2010-05-31 16:41:35 +02:00
af_inet.c net: reserve ports for applications using fixed port numbers 2010-05-15 23:28:40 -07:00
ah4.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
arp.c net: Use ip_route_input_noref() in input path 2010-05-17 17:18:51 -07:00
cipso_ipv4.c net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
datagram.c
devinet.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
esp4.c
fib_frontend.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
fib_hash.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
fib_lookup.h
fib_rules.c net: rtnetlink: decouple rtnetlink address families from real address families 2010-04-26 16:13:54 +02:00
fib_semantics.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
fib_trie.c net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
icmp.c net: add a noref bit on skb dst 2010-05-17 17:18:50 -07:00
igmp.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
inet_connection_sock.c net: reserve ports for applications using fixed port numbers 2010-05-15 23:28:40 -07:00
inet_diag.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
inet_fragment.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
inet_hashtables.c net: reserve ports for applications using fixed port numbers 2010-05-15 23:28:40 -07:00
inet_lro.c
inet_timewait_sock.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
inetpeer.c
ip_forward.c Merge branch 'master' of /repos/git/net-next-2.6 2010-04-20 16:02:01 +02:00
ip_fragment.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ip_gre.c net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
ip_input.c net: Use ip_route_input_noref() in input path 2010-05-17 17:18:51 -07:00
ip_options.c net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
ip_output.c udp: Fix bogus UFO packet generation 2010-06-21 13:57:34 -07:00
ip_sockglue.c net: ip_queue_rcv_skb() helper 2010-04-28 15:31:51 -07:00
ipcomp.c
ipconfig.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
ipip.c net: Introduce skb_tunnel_rx() helper 2010-05-17 22:36:55 -07:00
ipmr.c ipmr: Don't leak memory if fib lookup fails. 2010-07-15 22:38:43 -07:00
Kconfig syncookies: remove Kconfig text line about disabled-by-default 2010-06-04 15:56:01 -07:00
Makefile
netfilter.c net: add a noref bit on skb dst 2010-05-17 17:18:50 -07:00
proc.c tcp: Add SNMP counter for DEFER_ACCEPT 2010-03-21 18:31:35 -07:00
protocol.c
raw.c Merge branch 'master' of /repos/git/net-next-2.6 2010-05-10 18:39:28 +02:00
route.c net: implements ip_route_input_noref() 2010-05-17 17:18:51 -07:00
syncookies.c tcp: use correct net ns in cookie_v4_check() 2010-06-04 15:56:03 -07:00
sysctl_net_ipv4.c net: reserve ports for applications using fixed port numbers 2010-05-15 23:28:40 -07:00
tcp_bic.c
tcp_cong.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
tcp_cubic.c
tcp_diag.c
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c TCP: tcp_hybla: Fix integer overflow in slow start increment 2010-06-02 07:15:48 -07:00
tcp_illinois.c
tcp_input.c net/ipv4/tcp_input.c: fix compilation breakage when FASTRETRANS_DEBUG > 1 2010-05-31 23:52:39 -07:00
tcp_ipv4.c rps: tcp: fix rps_sock_flow_table table updates 2010-06-04 15:56:02 -07:00
tcp_lp.c
tcp_minisocks.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
tcp_output.c tcp: fix crash in tcp_xmit_retransmit_queue 2010-07-19 12:43:49 -07:00
tcp_probe.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
tcp_scalable.c
tcp_timer.c TCP: avoid to send keepalive probes if receiving data 2010-04-27 12:53:25 -07:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c rfs: call sock_rps_record_flow() in tcp_splice_read() 2010-07-14 14:45:15 -07:00
tunnel4.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
udp_impl.h
udp.c net: sock_queue_err_skb() dont mess with sk_forward_alloc 2010-05-31 23:44:05 -07:00
udplite.c
xfrm4_input.c net: Use ip_route_input_noref() in input path 2010-05-17 17:18:51 -07:00
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
xfrm4_output.c netfilter: ipv4: use NFPROTO values for NF_HOOK invocation 2010-03-25 16:00:30 +01:00
xfrm4_policy.c xfrm: fix xfrm by MARK logic 2010-07-04 11:46:07 -07:00
xfrm4_state.c
xfrm4_tunnel.c