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2a890807f4
commit fa0dc04df259ba2df3ce1920e9690c7842f8fa4b upstream.
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: b3ca9b02b007 ("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>
Cc: Ben Hutchings <ben@decadent.org.uk>
[wt: note, according to Rainer & Ben the bug was really introduced in
2.5.65, not by the commit mentionned in Fixes. 2.6.32 uses siocb->scm
instead of scm]
Signed-off-by: Willy Tarreau <w@1wt.eu>