]> git.baikalelectronics.ru Git - kernel.git/commit
tcp: tracepoint: only call trace_tcp_send_reset with full socket
authorSong Liu <songliubraving@fb.com>
Wed, 7 Feb 2018 04:50:23 +0000 (20:50 -0800)
committerDavid S. Miller <davem@davemloft.net>
Thu, 8 Feb 2018 03:00:42 +0000 (22:00 -0500)
commit5212b3df36116b5239a2965f4d7d684a986aaa53
tree83ff74b2e6d19b9a60b67872f718f9fa630319ed
parentdd3102a7ce8687f7b519ae575bf2f7f00351c962
tcp: tracepoint: only call trace_tcp_send_reset with full socket

tracepoint tcp_send_reset requires a full socket to work. However, it
may be called when in TCP_TIME_WAIT:

        case TCP_TW_RST:
                tcp_v6_send_reset(sk, skb);
                inet_twsk_deschedule_put(inet_twsk(sk));
                goto discard_it;

To avoid this problem, this patch checks the socket with sk_fullsock()
before calling trace_tcp_send_reset().

Fixes: ef47387ba2d4 ("tcp: add tracepoint trace_tcp_send_reset")
Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_ipv4.c
net/ipv6/tcp_ipv6.c