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| author | Wu Fengguang <fengguang.wu@intel.com> | 2012-08-02 23:10:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-03 16:53:22 -0700 |
| commit | 77f00f6324cb97cf1df6f9c4aaeea6ada23abdb2 (patch) | |
| tree | 2fa128ec6e67e6ebaf36cc84b0138321d6e0a4a8 | |
| parent | ae9e63bb2c0cf5437d9d13d822b27149336c6e0e (diff) | |
| download | lwn-77f00f6324cb97cf1df6f9c4aaeea6ada23abdb2.tar.gz lwn-77f00f6324cb97cf1df6f9c4aaeea6ada23abdb2.zip | |
isdnloop: fix and simplify isdnloop_init()
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@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/isdn/isdnloop/isdnloop.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/isdn/isdnloop/isdnloop.c b/drivers/isdn/isdnloop/isdnloop.c index 5405ec644db3..baf2686aa8eb 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)); |