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authorbill bonaparte <programme110@gmail.com>2014-11-06 14:36:48 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2014-11-14 17:43:05 +0100
commit5195c14c8b27cc0b18220ddbf0e5ad3328a04187 (patch)
tree4cb248fa4103774404e2d8b50cb1c230e694dfaa /fs/jffs2
parentb326dd37b94e29bf6a15940f4fa66aa21a678ab1 (diff)
downloadlinux-5195c14c8b27cc0b18220ddbf0e5ad3328a04187.tar.bz2
netfilter: conntrack: fix race in __nf_conntrack_confirm against get_next_corpse
After removal of the central spinlock nf_conntrack_lock, in commit 93bb0ceb75be2 ("netfilter: conntrack: remove central spinlock nf_conntrack_lock"), it is possible to race against get_next_corpse(). The race is against the get_next_corpse() cleanup on the "unconfirmed" list (a per-cpu list with seperate locking), which set the DYING bit. Fix this race, in __nf_conntrack_confirm(), by removing the CT from unconfirmed list before checking the DYING bit. In case race occured, re-add the CT to the dying list. While at this, fix coding style of the comment that has been updated. Fixes: 93bb0ceb75be2 ("netfilter: conntrack: remove central spinlock nf_conntrack_lock") Reported-by: bill bonaparte <programme110@gmail.com> Signed-off-by: bill bonaparte <programme110@gmail.com> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'fs/jffs2')
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