linux-kernel - [40/44] can-bcm: fix minor heap overflow

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Message-Id: <20101208000643.623647601@clark.site>
Date:	Tue, 07 Dec 2010 16:04:39 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	"David S. Miller" <davem@...emloft.net>
Subject: [40/44] can-bcm: fix minor heap overflow

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

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

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: Greg Kroah-Hartman <gregkh@...e.de>

---
 net/can/bcm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -121,7 +121,7 @@ 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)


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