tcp: tracepoint: only call trace_tcp_send_reset with full socket

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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: c24b14c46b ("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>

...

This commit is contained in:

Song Liu 2018-02-06 20:50:23 -08:00 • committed by David S. Miller

parent 043e337f55

commit 5c487bb9ad

2 changed files with 4 additions and 2 deletions

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3

net/ipv4/tcp_ipv4.c

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3

net/ipv6/tcp_ipv6.c

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