[PATCH] [perf] lsdir_bid_tail_filter: fix index check

[Gaurav Singh]

Check bounds before accessing d->d_name[].

Signed-off-by: Gaurav Singh <gaurav1...@gmail.com>
---
 tools/perf/util/build-id.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index c076fc7fe025..8c35cbe93f10 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -431,7 +431,7 @@ static bool lsdir_bid_tail_filter(const char *name 
__maybe_unused,
                                  struct dirent *d)
 {
        int i = 0;
-       while (isxdigit(d->d_name[i]) && i < SBUILD_ID_SIZE - 3)
+       while (i < SBUILD_ID_SIZE - 3 && isxdigit(d->d_name[i]))
                i++;
        return (i == SBUILD_ID_SIZE - 3) && (d->d_name[i] == '\0');
 }
-- 
2.17.1