Commit-ID: 0e6ba11511aef91ba8e2528ddc681d88922d7b0b
Gitweb: http://git.kernel.org/tip/0e6ba11511aef91ba8e2528ddc681d88922d7b0b
Author: Tommi Rantala <tommi.t.rantala@xxxxxxxxx>
AuthorDate: Wed, 22 Mar 2017 15:06:21 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 27 Mar 2017 15:35:56 -0300
perf tests: Do not assume that readlink() returns a null terminated string
Ensure that the string in buf is null terminated.
Signed-off-by: Tommi Rantala <tommi.t.rantala@xxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170322130624.21881-4-tommi.t.rantala@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/tests/sdt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/tests/sdt.c b/tools/perf/tests/sdt.c
index f59d210..26e5b7a 100644
--- a/tools/perf/tests/sdt.c
+++ b/tools/perf/tests/sdt.c
@@ -43,7 +43,7 @@ static char *get_self_path(void)
{
char *buf = calloc(PATH_MAX, sizeof(char));
- if (buf && readlink("/proc/self/exe", buf, PATH_MAX) < 0) {
+ if (buf && readlink("/proc/self/exe", buf, PATH_MAX - 1) < 0) {
pr_debug("Failed to get correct path of perf\n");
free(buf);
return NULL;
--
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