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Date: Tue, 8 Mar 2016 16:30:15 -0800 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Eric Dumazet <edumazet@...gle.com>, Rainer Weikusat <rweikusat@...ileactivedefense.com>, "David S . Miller" <davem@...emloft.net>, Luis Henriques <luis.henriques@...onical.com>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.19.y-ckt 157/196] af_unix: fix struct pid memory leak 3.19.8-ckt16 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Eric Dumazet <edumazet@...gle.com> 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@...gle.com> Signed-off-by: Eric Dumazet <edumazet@...gle.com> Cc: Rainer Weikusat <rweikusat@...ileactivedefense.com> Signed-off-by: David S. Miller <davem@...emloft.net> [ luis: backported to 3.16: - use siocb->scm instead of &scm ] Signed-off-by: Luis Henriques <luis.henriques@...onical.com> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- net/unix/af_unix.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 59797d8..3a27d4c 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -2154,6 +2154,7 @@ again: if (signal_pending(current)) { err = sock_intr_errno(timeo); + scm_destroy(siocb->scm); goto out; } -- 2.7.0
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