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authorParthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>2017-04-26 10:05:00 +0200
committerDavid S. Miller <davem@davemloft.net>2017-04-28 12:20:42 -0400
commit42b531de17d2f6bb9293f23398f6d9bb94635c3e (patch)
treed4df7e1da29816011a2c74a592969288b391bfa2 /net/tipc
parentf83246089ca09308425175d47f5e71e6da68b2ef (diff)
downloadlinux-42b531de17d2f6bb9293f23398f6d9bb94635c3e.tar.bz2
tipc: Fix missing connection request handling
In filter_connect, we use waitqueue_active() to check for any connections to wakeup. But waitqueue_active() is missing memory barriers while accessing the critical sections, leading to inconsistent results. In this commit, we replace this with an SMP safe wq_has_sleeper() using the generic socket callback sk_data_ready(). Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/socket.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 566906795c8c..3b8df510a80c 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1581,8 +1581,7 @@ static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb)
return true;
/* If empty 'ACK-' message, wake up sleeping connect() */
- if (waitqueue_active(sk_sleep(sk)))
- wake_up_interruptible(sk_sleep(sk));
+ sk->sk_data_ready(sk);
/* 'ACK-' message is neither accepted nor rejected: */
msg_set_dest_droppable(hdr, 1);