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(parent: b46ffb8) | patch
netfilter: fix a race in nf_ct_ext_create()
authorEric Dumazet <eric.dumazet@gmail.com>
Tue, 21 Sep 2010 21:17:32 +0000 (21:17 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 22 Sep 2010 20:13:33 +0000 (13:13 -0700)
commit15cdeadaa5d76009e20c7792aed69f5a73808f97
tree11eb05f550c046b3099d52df146948dce0c12635tree | snapshot
parentb46ffb854554ff939701bdd492b81558da5706fccommit | diff
netfilter: fix a race in nf_ct_ext_create()

As soon as rcu_read_unlock() is called, there is no guarantee current
thread can safely derefence t pointer, rcu protected.

Fix is to copy t->alloc_size in a temporary variable.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/netfilter/nf_conntrack_extend.c diff | blob | history
Domain: System / Kernel;