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af_unix: fix struct pid memory leak

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[ Upstream commit fa0dc04df2 ]

Dmitry reported a struct pid leak detected by a syzkaller program.

Bug happens in unix_stream_recvmsg() when we break the loop when a
signal is pending, without properly releasing scm.

Fixes: b3ca9b02b0 ("net: fix multithreaded signal handling in unix recv routines")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eric Dumazet 2016-01-24 13:53:50 -08:00 committed by Greg Kroah-Hartman
parent e5abc10d19
commit 39770be4d6
1 changed files with 1 additions and 0 deletions
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net/unix/af_unix.c
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@ -2332,6 +2332,7 @@ static int unix_stream_read_generic(struct unix_stream_read_state *state)
if (signal_pending(current)) {
err = sock_intr_errno(timeo);
scm_destroy(&scm);
goto out;
}