From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] net_sched: stack info leak in cbq_dump_wrr()
Date: Mon, 29 Jul 2013 22:36:51 +0300 [thread overview]
Message-ID: <20130729193651.GA12525@elgon.mountain> (raw)
opt.__reserved isn't cleared so we leak a byte of stack information.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 71a5688..6398a61 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1469,6 +1469,7 @@ static int cbq_dump_wrr(struct sk_buff *skb, struct cbq_class *cl)
opt.allot = cl->allot;
opt.priority = cl->priority + 1;
opt.cpriority = cl->cpriority + 1;
+ opt.__reserved = 0;
opt.weight = cl->weight;
if (nla_put(skb, TCA_CBQ_WRROPT, sizeof(opt), &opt))
goto nla_put_failure;
next reply other threads:[~2013-07-29 19:37 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-29 19:36 Dan Carpenter [this message]
2013-07-29 19:44 ` [patch] net_sched: stack info leak in cbq_dump_wrr() Joe Perches
2013-07-29 20:01 ` Dan Carpenter
2013-07-29 20:12 ` Joe Perches
2013-07-29 21:17 ` David Miller
2013-07-29 21:50 ` Joe Perches
2013-07-30 6:55 ` Dan Carpenter
2013-07-30 7:12 ` Joe Perches
2013-07-30 7:18 ` David Miller
2013-07-30 10:18 ` walter harms
2013-07-29 21:20 ` Jiri Pirko
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=20130729193651.GA12525@elgon.mountain \
--to=dan.carpenter@oracle.com \
--cc=davem@davemloft.net \
--cc=jhs@mojatatu.com \
--cc=kernel-janitors@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).