From: Oliver Hartkopp <socketcan@hartkopp.net>
Date: Wed, 10 Nov 2010 12:10:30 +0000 (+0000)
Subject: can-bcm: fix minor heap overflow
X-Git-Tag: firefly_0821_release~10186^2~640
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e2de51a1c73d762ee1b5246053b087e295f4a7e9;p=firefly-linux-kernel-4.4.55.git

can-bcm: fix minor heap overflow

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@vsecurity.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
CC: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/net/can/bcm.c b/net/can/bcm.c
index ff8c69000bf3..4a192f7d93f8 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -124,7 +124,7 @@ 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)