Messages in this thread | | | Date | Tue, 13 Sep 2005 18:33:45 +0200 | From | Patrick McHardy <> | Subject | Re: netfilter QUEUE target and packet socket interactions buggy or not |
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Nuutti Kotivuori wrote: > > Appended here is a backtrace with the tg3 driver. Also, it seems that > the bug cannot be reproduced with uniprocessor, only SMP. > > Unable to handle kernel NULL pointer dereference at virtual address 00000018
This means inode->i_security was NULL. AFAICT it is only set to NULL in inode_free_security() when the inode is freed. This shouldn't happen while the packet is queued since the skb should hold a reference to the socket on the output path. So it could be some protocol forgetting to increase the refcnt when taking a reference. What kind of packet is this? And what kernel version are you running? Until recently ip_conntrack did some fiddling with skb->sk which could lead to a packet on the output path with skb->sk set but no reference taken.
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