From: Eric Dumazet <[email protected]>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
[ 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 <[email protected]>
Signed-off-by: Eric Dumazet <[email protected]>
Cc: Rainer Weikusat <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Jiri Slaby <[email protected]>
---
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 31b88dcb0f01..5fb2d2af3e52 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2131,6 +2131,7 @@ again:
if (signal_pending(current)) {
err = sock_intr_errno(timeo);
+ scm_destroy(siocb->scm);
goto out;
}
--
2.7.2
