From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
-------------------
This is a commit scheduled for the next v2.6.34 longterm release.
http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git
If you see a problem with using this for longterm, please comment.
-------------------
commit 77f00f6324cb97cf1df6f9c4aaeea6ada23abdb2 upstream.
Fix a buffer overflow bug by removing the revision and printk.
[ 22.016214] isdnloop-ISDN-driver Rev 1.11.6.7
[ 22.097508] isdnloop: (loop0) virtual card added
[ 22.174400] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ffffffff83244972
[ 22.174400]
[ 22.436157] Pid: 1, comm: swapper Not tainted 3.5.0-bisect-00018-gfa8bbb1-dirty #129
[ 22.624071] Call Trace:
[ 22.720558] [<ffffffff832448c3>] ? CallcNew+0x56/0x56
[ 22.815248] [<ffffffff8222b623>] panic+0x110/0x329
[ 22.914330] [<ffffffff83244972>] ? isdnloop_init+0xaf/0xb1
[ 23.014800] [<ffffffff832448c3>] ? CallcNew+0x56/0x56
[ 23.090763] [<ffffffff8108e24b>] __stack_chk_fail+0x2b/0x30
[ 23.185748] [<ffffffff83244972>] isdnloop_init+0xaf/0xb1
Signed-off-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
---
drivers/isdn/isdnloop/isdnloop.c | 12 ------------
1 file changed, 12 deletions(-)
diff --git a/drivers/isdn/isdnloop/isdnloop.c b/drivers/isdn/isdnloop/isdnloop.c
index b8a1098b66ed..385279b2d54c 100644
--- a/drivers/isdn/isdnloop/isdnloop.c
+++ b/drivers/isdn/isdnloop/isdnloop.c
@@ -16,7 +16,6 @@
#include <linux/sched.h>
#include "isdnloop.h"
-static char *revision = "$Revision: 1.11.6.7 $";
static char *isdnloop_id = "loop0";
MODULE_DESCRIPTION("ISDN4Linux: Pseudo Driver that simulates an ISDN card");
@@ -1494,17 +1493,6 @@ isdnloop_addcard(char *id1)
static int __init
isdnloop_init(void)
{
- char *p;
- char rev[10];
-
- if ((p = strchr(revision, ':'))) {
- strcpy(rev, p + 1);
- p = strchr(rev, '$');
- *p = 0;
- } else
- strcpy(rev, " ??? ");
- printk(KERN_NOTICE "isdnloop-ISDN-driver Rev%s\n", rev);
-
if (isdnloop_id)
return (isdnloop_addcard(isdnloop_id));
--
1.8.5.2
--
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