tcp: fix a possible lockdep splat in tcp_done()

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syzbot found that if __inet_inherit_port() returns an error,
we call tcp_done() after inet_csk_prepare_forced_close(),
meaning the socket lock is no longer held.

We might fix this in a different way in net-next, but
for 5.4 it seems safer to relax the lockdep check.

Fixes: d983ea6f16 ("tcp: add rcu protection around tp->fastopen_rsk")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2019-10-14 06:47:57 -07:00 • committed by David S. Miller

parent c9b96eb6da

commit cab209e571

1 changed files with 6 additions and 2 deletions

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net/ipv4/tcp.c

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