diff options
| author | ramesh.nagappa@gmail.com <ramesh.nagappa@gmail.com> | 2012-10-05 19:10:15 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-10-30 23:26:33 +0000 |
| commit | f5b6b28c1f2c77dcbbf4b0f478078c6d6a661628 (patch) | |
| tree | 9fc6c7fbda162cca774fc5472c3357912417d5ea /net | |
| parent | ad5ca6d13f5c9c2f34f0ebc0dbea3da0e417805b (diff) | |
net: Fix skb_under_panic oops in neigh_resolve_output
[ Upstream commit e1f165032c8bade3a6bdf546f8faf61fda4dd01c ]
The retry loop in neigh_resolve_output() and neigh_connected_output()
call dev_hard_header() with out reseting the skb to network_header.
This causes the retry to fail with skb_under_panic. The fix is to
reset the network_header within the retry loop.
Signed-off-by: Ramesh Nagappa <ramesh.nagappa@ericsson.com>
Reviewed-by: Shawn Lu <shawn.lu@ericsson.com>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
Reviewed-by: Billie Alsup <billie.alsup@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/neighbour.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 7aafaeddfcbf..5b9709f18a64 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -1254,8 +1254,6 @@ int neigh_resolve_output(struct neighbour *neigh, struct sk_buff *skb) if (!dst) goto discard; - __skb_pull(skb, skb_network_offset(skb)); - if (!neigh_event_send(neigh, skb)) { int err; struct net_device *dev = neigh->dev; @@ -1265,6 +1263,7 @@ int neigh_resolve_output(struct neighbour *neigh, struct sk_buff *skb) neigh_hh_init(neigh, dst); do { + __skb_pull(skb, skb_network_offset(skb)); seq = read_seqbegin(&neigh->ha_lock); err = dev_hard_header(skb, dev, ntohs(skb->protocol), neigh->ha, NULL, skb->len); @@ -1295,9 +1294,8 @@ int neigh_connected_output(struct neighbour *neigh, struct sk_buff *skb) unsigned int seq; int err; - __skb_pull(skb, skb_network_offset(skb)); - do { + __skb_pull(skb, skb_network_offset(skb)); seq = read_seqbegin(&neigh->ha_lock); err = dev_hard_header(skb, dev, ntohs(skb->protocol), neigh->ha, NULL, skb->len); |