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netfilter: nf_conntrack: use hlist_add_head_rcu() in nf_conntrack_set_hashsize()
authorEric Dumazet <dada1@cosmosbay.com>
Wed, 25 Mar 2009 16:24:34 +0000 (17:24 +0100)
committerPatrick McHardy <kaber@trash.net>
Wed, 25 Mar 2009 16:24:34 +0000 (17:24 +0100)
commit78f3648601fdc7a8166748bbd6d0555a88efa24a
tree6884aa56afe297f794b4bd926890a59eae6c259etree | snapshot (tar.gz zip)
parenta9a9adfe2f99ddadfb574a098392a007970a1577commit | diff
netfilter: nf_conntrack: use hlist_add_head_rcu() in nf_conntrack_set_hashsize()

Using hlist_add_head() in nf_conntrack_set_hashsize() is quite dangerous.
Without any barrier, one CPU could see a loop while doing its lookup.
Its true new table cannot be seen by another cpu, but previous table is still
readable.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
net/netfilter/nf_conntrack_core.c diff | blob | blame | history