3.19.8-ckt16 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------ From: Eric Dumazet <eduma...@google.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 <dvyu...@google.com> Signed-off-by: Eric Dumazet <eduma...@google.com> Cc: Rainer Weikusat <rweiku...@mobileactivedefense.com> Signed-off-by: David S. Miller <da...@davemloft.net> [ luis: backported to 3.16: - use siocb->scm instead of &scm ] Signed-off-by: Luis Henriques <luis.henriq...@canonical.com> Signed-off-by: Kamal Mostafa <ka...@canonical.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