af_unix: fix struct pid memory leak
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>
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@ -2339,6 +2339,7 @@ again:
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if (signal_pending(current)) {
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err = sock_intr_errno(timeo);
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scm_destroy(&scm);
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goto out;
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}
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