From: Sasha Levin Date: Fri, 13 Dec 2013 15:54:22 +0000 (-0500) Subject: net: unix: allow bind to fail on mutex lock X-Git-Tag: v3.4.77~16 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c0be5de16bf9b4350802e28c3dd243ca2367c5ef;p=platform%2Fkernel%2Flinux-stable.git net: unix: allow bind to fail on mutex lock [ Upstream commit 37ab4fa7844a044dc21fde45e2a0fc2f3c3b6490 ] This is similar to the set_peek_off patch where calling bind while the socket is stuck in unix_dgram_recvmsg() will block and cause a hung task spew after a while. This is also the last place that did a straightforward mutex_lock(), so there shouldn't be any more of these patches. Signed-off-by: Sasha Levin Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 8519968..c0a81a5 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -712,7 +712,9 @@ static int unix_autobind(struct socket *sock) int err; unsigned int retries = 0; - mutex_lock(&u->readlock); + err = mutex_lock_interruptible(&u->readlock); + if (err) + return err; err = 0; if (u->addr) @@ -845,7 +847,9 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) goto out; addr_len = err; - mutex_lock(&u->readlock); + err = mutex_lock_interruptible(&u->readlock); + if (err) + goto out; err = -EINVAL; if (u->addr)