netdev - [patch -next v2] 6LoWPAN: double free in lowpan_fragment

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20111116083643.GA25612@mwanda>
Date:	Wed, 16 Nov 2011 11:36:43 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	Alexander Smirnov <alex.bluesman.smirnov@...il.com>
Cc:	Sergey Lapin <slapin@...fans.org>,
	"David S. Miller" <davem@...emloft.net>,
	linux-zigbee-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch -next v2] 6LoWPAN: double free in lowpan_fragment_xmit()

dev_queue_xmit() consumes its own skb, so the call to dev_kfree_skb()
in lowpan_fragment_xmit() is a double free.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
v2: fixed commit message.

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 602f318..e4ecc1e 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -980,9 +980,6 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
 
 	ret = dev_queue_xmit(frag);
 
-	if (ret < 0)
-		dev_kfree_skb(frag);
-
 	return ret;
 }
 


Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)