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| author | Daniel Schwierzeck <daniel.schwierzeck@googlemail.com> | 2011-08-19 12:04:20 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-08-20 14:13:05 -0700 |
| commit | fbe5e29ec1886967255e76946aaf537b8cc9b81e (patch) | |
| tree | 29256fddc5970305e8f70b1df36a208deede83dd /net/atm | |
| parent | 98e77438aed3cd3343cbb86825127b1d9d2bea33 (diff) | |
| download | lwn-fbe5e29ec1886967255e76946aaf537b8cc9b81e.tar.gz lwn-fbe5e29ec1886967255e76946aaf537b8cc9b81e.zip | |
atm: br2684: Fix oops due to skb->dev being NULL
This oops have been already fixed with commit
27141666b69f535a4d63d7bc6d9e84ee5032f82a
atm: [br2684] Fix oops due to skb->dev being NULL
It happens that if a packet arrives in a VC between the call to open it on
the hardware and the call to change the backend to br2684, br2684_regvcc
processes the packet and oopses dereferencing skb->dev because it is
NULL before the call to br2684_push().
but have been introduced again with commit
b6211ae7f2e56837c6a4849316396d1535606e90
atm: Use SKB queue and list helpers instead of doing it by-hand.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/atm')
| -rw-r--r-- | net/atm/br2684.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/atm/br2684.c b/net/atm/br2684.c index 52cfd0c3ea71..d07223c834af 100644 --- a/net/atm/br2684.c +++ b/net/atm/br2684.c @@ -558,12 +558,13 @@ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg) spin_unlock_irqrestore(&rq->lock, flags); skb_queue_walk_safe(&queue, skb, tmp) { - struct net_device *dev = skb->dev; + struct net_device *dev; + + br2684_push(atmvcc, skb); + dev = skb->dev; dev->stats.rx_bytes -= skb->len; dev->stats.rx_packets--; - - br2684_push(atmvcc, skb); } /* initialize netdev carrier state */ |