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authorErik Hugne <erik.hugne@ericsson.com>2014-12-03 16:58:40 +0100
committerDavid S. Miller <davem@davemloft.net>2014-12-09 13:41:54 -0500
commit4988bb4a3f0b3b0273c21c6c52f2730f55693b42 (patch)
tree9668bf234d3b190d8010b353e54521d39f8a2d02 /net
parentd9a28c5b4c9a69f3036743bed36902b45dd39f1d (diff)
tipc: fix missing spinlock init and nullptr oops
commit 908344cdda80 ("tipc: fix bug in multicast congestion handling") introduced two bugs with the bclink wakeup function. This commit fixes the missing spinlock init for the waiting_sks list. We also eliminate the race condition between the waiting_sks length check/dequeue operations in tipc_bclink_wakeup_users by simply removing the redundant length check. Signed-off-by: Erik Hugne <erik.hugne@ericsson.com> Acked-by: Tero Aho <Tero.Aho@coriant.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/tipc/bcast.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index f0761c771734..96ceefeb9daf 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -233,8 +233,11 @@ static void bclink_retransmit_pkt(u32 after, u32 to)
*/
void tipc_bclink_wakeup_users(void)
{
- while (skb_queue_len(&bclink->link.waiting_sks))
- tipc_sk_rcv(skb_dequeue(&bclink->link.waiting_sks));
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&bclink->link.waiting_sks)))
+ tipc_sk_rcv(skb);
+
}
/**
@@ -950,7 +953,7 @@ int tipc_bclink_init(void)
spin_lock_init(&bclink->lock);
__skb_queue_head_init(&bcl->outqueue);
__skb_queue_head_init(&bcl->deferred_queue);
- __skb_queue_head_init(&bcl->waiting_sks);
+ skb_queue_head_init(&bcl->waiting_sks);
bcl->next_out_no = 1;
spin_lock_init(&bclink->node.lock);
__skb_queue_head_init(&bclink->node.waiting_sks);