Commit 4853f128 authored Dec 21, 2017 by Jiri Pirko Committed by David S. Miller Dec 26, 2017

net: sched: fix possible null pointer deref in tcf_block_put



We need to check block for being null in both tcf_block_put and
tcf_block_put_ext.

Fixes: 343723dd ("net: sched: fix clsact init error path")
Reported-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 0a3d805c

net/sched/cls_api.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -379,6 +379,8 @@ void tcf_block_put(struct tcf_block *block)
		{
		struct tcf_block_ext_info ei = {0, };

		if (!block)
		return;
		tcf_block_put_ext(block, block->q, &ei);
		}