Commit 51a00daf authored by Jon Paul Maloy's avatar Jon Paul Maloy Committed by David S. Miller

tipc: fix bug in socket reception function

In commit c637c103 ("tipc: resolve race
problem at unicast message reception") we introduced a time limit
for how long the function tipc_sk_eneque() would be allowed to execute
its loop. Unfortunately, the test for when this limit is passed was put
in the wrong place, resulting in a lost message when the test is true.

We fix this by moving the test to before we dequeue the next buffer
from the input queue.
Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 662f5533
......@@ -1802,12 +1802,11 @@ static int tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,
unsigned long time_limit = jiffies + 2;
while (skb_queue_len(inputq)) {
if (unlikely(time_after_eq(jiffies, time_limit)))
return TIPC_OK;
skb = tipc_skb_dequeue(inputq, dport);
if (unlikely(!skb))
return TIPC_OK;
/* Return if softirq window exhausted */
if (unlikely(time_after_eq(jiffies, time_limit)))
return TIPC_OK;
if (!sock_owned_by_user(sk)) {
err = filter_rcv(sk, &skb);
if (likely(!skb))
......
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