OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[NET]: Fix race in generic address resolution. 

neigh_update sends skb from neigh->arp_queue while neigh_timer_handler
has increased skbs refcount and calls solicit with the
skb. neigh_timer_handler should not increase skbs refcount but make a
copy of the skb and do solicit with the copy.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Frank Blaschka 2008-03-03 12:16:04 -08:00 committed by David S. Miller
parent c3d84a4dd2
commit 7e36763b2c
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/core/neighbour.c
View File

@ -839,7 +839,7 @@ static void neigh_timer_handler(unsigned long arg)
struct sk_buff *skb = skb_peek(&neigh->arp_queue);
/* keep skb alive even if arp_queue overflows */
if (skb)
skb_get(skb);
skb = skb_copy(skb, GFP_ATOMIC);
write_unlock(&neigh->lock);
neigh->ops->solicit(neigh, skb);
atomic_inc(&neigh->probes);