From: Jiri Pirko <jiri@resnulli.us>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, jhs@mojatatu.com, xiyou.wangcong@gmail.com,
mlxsw@mellanox.com, bhole_prashant_q7@lab.ntt.co.jp
Subject: [patch net] net: sched: fix possible null pointer deref in tcf_block_put
Date: Thu, 21 Dec 2017 13:13:59 +0100 [thread overview]
Message-ID: <20171221121359.3711-1-jiri@resnulli.us> (raw)
From: Jiri Pirko <jiri@mellanox.com>
We need to check block for being null in both tcf_block_put and
tcf_block_put_ext.
Fixes: 343723dd51ef ("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>
---
net/sched/cls_api.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index b91ea03..b9d63d2 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -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);
}
--
2.9.5
next reply other threads:[~2017-12-21 12:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-21 12:13 Jiri Pirko [this message]
2017-12-26 18:02 ` [patch net] net: sched: fix possible null pointer deref in tcf_block_put David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171221121359.3711-1-jiri@resnulli.us \
--to=jiri@resnulli.us \
--cc=bhole_prashant_q7@lab.ntt.co.jp \
--cc=davem@davemloft.net \
--cc=jhs@mojatatu.com \
--cc=mlxsw@mellanox.com \
--cc=netdev@vger.kernel.org \
--cc=xiyou.wangcong@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox