diff options
| author | Hoang Le <hoang.h.le@dektech.com.au> | 2021-07-23 09:25:34 +0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-04 12:22:16 +0200 |
| commit | cf76aa1aab8089d271ea827995099a914dec7c98 (patch) | |
| tree | 05118fdee40a1f05220dbf3ba8844935e33cb27c | |
| parent | 37fb1aa49cfa538ea5a8db660918fea5dd6ca1e2 (diff) | |
| download | linux-rt-cf76aa1aab8089d271ea827995099a914dec7c98.tar.gz | |
tipc: fix sleeping in tipc accept routine
[ Upstream commit d237a7f11719ff9320721be5818352e48071aab6 ]
The release_sock() is blocking function, it would change the state
after sleeping. In order to evaluate the stated condition outside
the socket lock context, switch to use wait_woken() instead.
Fixes: 6398e23cdb1d8 ("tipc: standardize accept routine")
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/tipc/socket.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 14e6cb814e4c..2e4d892768f9 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -2001,7 +2001,7 @@ static int tipc_listen(struct socket *sock, int len) static int tipc_wait_for_accept(struct socket *sock, long timeo) { struct sock *sk = sock->sk; - DEFINE_WAIT(wait); + DEFINE_WAIT_FUNC(wait, woken_wake_function); int err; /* True wake-one mechanism for incoming connections: only @@ -2010,12 +2010,12 @@ static int tipc_wait_for_accept(struct socket *sock, long timeo) * anymore, the common case will execute the loop only once. */ for (;;) { - prepare_to_wait_exclusive(sk_sleep(sk), &wait, - TASK_INTERRUPTIBLE); if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { + add_wait_queue(sk_sleep(sk), &wait); release_sock(sk); - timeo = schedule_timeout(timeo); + timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); lock_sock(sk); + remove_wait_queue(sk_sleep(sk), &wait); } err = 0; if (!skb_queue_empty(&sk->sk_receive_queue)) @@ -2027,7 +2027,6 @@ static int tipc_wait_for_accept(struct socket *sock, long timeo) if (signal_pending(current)) break; } - finish_wait(sk_sleep(sk), &wait); return err; } |