linux-kernel - [34-longterm 116/209] can-bcm: fix minor heap overflow

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Date:	Thu, 14 Apr 2011 13:54:34 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	stable@...nel.org, linux-kernel@...r.kernel.org
Cc:	stable-review@...nel.org, Oliver Hartkopp <socketcan@...tkopp.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [34-longterm 116/209] can-bcm: fix minor heap overflow

From: Oliver Hartkopp <socketcan@...tkopp.net>

  =====================================================================
  | This is a commit scheduled for the next v2.6.34 longterm release. |
  | If you see a problem with using this for longterm, please comment.|
  =====================================================================

commit 0597d1b99fcfc2c0eada09a698f85ed413d4ba84 upstream.

On 64-bit platforms the ASCII representation of a pointer may be up to 17
bytes long. This patch increases the length of the buffer accordingly.

http://marc.info/?l=linux-netdev&m=128872251418192&w=2

Reported-by: Dan Rosenberg <drosenberg@...curity.com>
Signed-off-by: Oliver Hartkopp <socketcan@...tkopp.net>
CC: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 net/can/bcm.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/can/bcm.c b/net/can/bcm.c
index e10ee05..b8f7a2f 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -125,7 +125,7 @@ struct bcm_sock {
 	struct list_head tx_ops;
 	unsigned long dropped_usr_msgs;
 	struct proc_dir_entry *bcm_proc_read;
-	char procname [9]; /* pointer printed in ASCII with \0 */
+	char procname [20]; /* pointer printed in ASCII with \0 */
 };
 
 static inline struct bcm_sock *bcm_sk(const struct sock *sk)
-- 
1.7.4.4

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