Commit 59560a38 authored Jun 28, 2012 by Tomasz Bursztyka Committed by Pablo Neira Ayuso Jul 04, 2012

netfilter: nfnetlink: check callbacks before using those in nfnetlink_rcv_msg



nfnetlink_rcv_msg() might call a NULL callback which will cause NULL pointer
dereference.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

parent be0593c6

net/netfilter/nfnetlink.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -184,9 +184,11 @@ replay:
		lockdep_is_held(&nfnl_mutex)) != ss \|\|
		nfnetlink_find_client(type, ss) != nc)
		err = -EAGAIN;
		else
		else if (nc->call)
		err = nc->call(net->nfnl, skb, nlh,
		(const struct nlattr **)cda);
		else
		err = -EINVAL;
		nfnl_unlock();
		}
		if (err == -EAGAIN)