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net: sched: fix p_filter_chain check in tcf_chain_flush
authorJiri Pirko <jiri@mellanox.com>
Fri, 18 Aug 2017 08:10:43 +0000 (10:10 +0200)
committerDavid S. Miller <davem@davemloft.net>
Fri, 18 Aug 2017 17:19:11 +0000 (10:19 -0700)
commitacc8b31665b4cc17b35c4fa445427f7e2f6dc86b
treea81f0632c483e2d8733a401339b9d5fbef3c67batree
parent014cd0a368dc6351c65d51e4ee34f8573a4a1543commit | diff
net: sched: fix p_filter_chain check in tcf_chain_flush

The dereference before check is wrong and leads to an oops when
p_filter_chain is NULL. The check needs to be done on the pointer to
prevent NULL dereference.

Fixes: f93e1cdcf42c ("net/sched: fix filter flushing")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sched/cls_api.c diff | blob | blame | history
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