diff options
| author | Li Zefan <lizf@cn.fujitsu.com> | 2009-04-09 11:19:40 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-09 05:52:40 +0200 |
| commit | 9eb85125ce218a8b8d9a7c982510388e227adbec (patch) | |
| tree | 320b87113d2c6b151f14e39d3a7e60174e19b0be | |
| parent | 47788c58e66c050982241d9a05eb690daceb05a9 (diff) | |
blktrace: pass the right pointer to kfree()
Impact: fix kfree crash with non-standard act_mask string
If passing a string with leading white spaces to strstrip(),
the returned ptr != the original ptr.
This bug was introduced by me.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <49DD694C.8020902@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/trace/blktrace.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index b32ff446c3fb..921ef5d1f0ba 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -1377,12 +1377,12 @@ static int blk_trace_str2mask(const char *str) { int i; int mask = 0; - char *s, *token; + char *buf, *s, *token; - s = kstrdup(str, GFP_KERNEL); - if (s == NULL) + buf = kstrdup(str, GFP_KERNEL); + if (buf == NULL) return -ENOMEM; - s = strstrip(s); + s = strstrip(buf); while (1) { token = strsep(&s, ","); @@ -1403,7 +1403,7 @@ static int blk_trace_str2mask(const char *str) break; } } - kfree(s); + kfree(buf); return mask; } |