Messages in this thread | | | Subject | Re: 答复: [PATCH] set fake_rtable's dst to NULL to avoid kernel Oops. | From | Eric Dumazet <> | Date | Thu, 29 Mar 2012 10:52:00 +0200 |
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On Thu, 2012-03-29 at 14:40 +0800, Peter Huang (Peng) wrote: > We already check current kernel-3.3, it has the same problem. > > I am not very sure that if this modify could cause other problems or not, > Because I don't know where fake_rtable was used.
Check net/bridge/br_netfilter.c and commits e688a6048076 (net: introduce DST_NOPEER dst flag ) 4adf0af6818f3ea5 (bridge: send correct MTU value in PMTU (revised))
Apparently bug is because struct net_bridge is freed while its embedded fake_rtable is still used by some packets.
I am not sure we are allowed to NULLify skb->dst, it might break netfilter.
Maybe real fix would be to use a non embedded dst.
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