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(parent: c317428) | patch
netfilter: nf_iterate: fix incorrect RCU usage
authorPatrick McHardy <kaber@trash.net>
Mon, 14 Feb 2011 16:35:07 +0000 (17:35 +0100)
committerPatrick McHardy <kaber@trash.net>
Mon, 14 Feb 2011 16:35:07 +0000 (17:35 +0100)
commitde9963f0f2dfad128b26ae7bf6005f5948416a6d
tree73b45541d33e86600cd10e4be43298864f2b6a1atree | snapshot (tar.gz zip)
parentc317428644c0af137d80069ab178cd797da3be45commit | diff
netfilter: nf_iterate: fix incorrect RCU usage

As noticed by Eric, nf_iterate doesn't use RCU correctly by
accessing the prev pointer of a RCU protected list element when
a verdict of NF_REPEAT is issued.

Fix by jumping backwards to the hook invocation directly instead
of loading the previous list element before continuing the list
iteration.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
net/netfilter/core.c diff | blob | blame | history