Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 007/342] af_unix: fix struct pid memory leak | Date | Tue, 01 Mar 2016 23:53:54 +0000 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet <edumazet@google.com>
[ Upstream commit fa0dc04df259ba2df3ce1920e9690c7842f8fa4b ]
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- net/unix/af_unix.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -2332,6 +2332,7 @@ again: if (signal_pending(current)) { err = sock_intr_errno(timeo); + scm_destroy(&scm); goto out; }
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