Commit-ID: e59d29e88f7b7e3d1231202b0203d0af6f15a440
Gitweb: http://git.kernel.org/tip/e59d29e88f7b7e3d1231202b0203d0af6f15a440
Author: Wang Nan <wangn...@huawei.com>
AuthorDate: Tue, 28 Apr 2015 08:46:09 +0000
Committer: Arnaldo Carvalho de Melo <a...@redhat.com>
CommitDate: Tue, 5 May 2015 12:26:52 -0300
perf probe: Fix segfault if passed with ''.
Since parse_perf_probe_point() deals with a user passed argument, we
should not assume it to be a valid string.
Without this patch, if pass '' to perf probe, a segfault raises:
$ perf probe -a ''
Segmentation fault
This patch checks argument of parse_perf_probe_point() before
string processing.
After this patch:
$ perf probe -a ''
usage: perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]
or: perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]
...
Signed-off-by: Wang Nan <wangn...@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu...@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: David Ahern <dsah...@gmail.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Cc: Zefan Li <lize...@huawei.com>
Link:
http://lkml.kernel.org/r/1430210769-94177-1-git-send-email-wangn...@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
tools/perf/util/probe-event.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index d8bb616..d05b77c 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -1084,6 +1084,8 @@ static int parse_perf_probe_point(char *arg, struct
perf_probe_event *pev)
*
* TODO:Group name support
*/
+ if (!arg)
+ return -EINVAL;
ptr = strpbrk(arg, ";=@+%");
if (ptr && *ptr == '=') { /* Event name */
--
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