From: Vlad Buslov <vladbu@mellanox.com>
To: netdev@vger.kernel.org
Cc: idosch@idosch.org, jhs@mojatatu.com, xiyou.wangcong@gmail.com,
jiri@resnulli.us, davem@davemloft.net,
Vlad Buslov <vladbu@mellanox.com>
Subject: [PATCH net-next] net: sched: matchall: verify that filter is not NULL in mall_walk()
Date: Fri, 15 Feb 2019 17:17:56 +0200 [thread overview]
Message-ID: <20190215151756.8719-1-vladbu@mellanox.com> (raw)
Check that filter is not NULL before passing it to tcf_walker->fn()
callback. This can happen when mall_change() failed to offload filter to
hardware.
Fixes: ed76f5edccc9 ("net: sched: protect filter_chain list with filter_chain_lock mutex")
Reported-by: Ido Schimmel <idosch@mellanox.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
---
net/sched/cls_matchall.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index a37137430e61..1f9d481b0fbb 100644
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -247,6 +247,9 @@ static void mall_walk(struct tcf_proto *tp, struct tcf_walker *arg,
if (arg->count < arg->skip)
goto skip;
+
+ if (!head)
+ return;
if (arg->fn(tp, head, arg) < 0)
arg->stop = 1;
skip:
--
2.13.6
next reply other threads:[~2019-02-15 15:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-15 15:17 Vlad Buslov [this message]
2019-02-17 21:25 ` [PATCH net-next] net: sched: matchall: verify that filter is not NULL in mall_walk() David Miller
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