3.2.78-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Eric Dumazet <[email protected]> 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 <[email protected]> Signed-off-by: Eric Dumazet <[email protected]> Cc: Rainer Weikusat <[email protected]> Signed-off-by: David S. Miller <[email protected]> [bwh: Backported to 3.2: cookie is *sicob->scm, not scm] Signed-off-by: Ben Hutchings <[email protected]> --- net/unix/af_unix.c | 1 + 1 file changed, 1 insertion(+) --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -2100,6 +2100,7 @@ static int unix_stream_recvmsg(struct ki if (signal_pending(current)) { err = sock_intr_errno(timeo); + scm_destroy(siocb->scm); goto out; }
