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Subject[PATCH] [perf] sort : Fix null pointer dereference in _hist_entry__sym_snprintf
Date
The pointer ms can be NULL. Add null check before
dereferencing it to avoid segmentation fault.

Signed-off-by: Gaurav Singh <gaurav1086@gmail.com>
---
tools/perf/util/sort.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index d42339df20f8..25c7c96893f6 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -294,6 +294,9 @@ static int _hist_entry__sym_snprintf(struct map_symbol *ms,
u64 ip, char level, char *bf, size_t size,
unsigned int width)
{
+ if (!ms)
+ return 0;
+
struct symbol *sym = ms->sym;
struct map *map = ms->map;
size_t ret = 0;
--
2.17.1
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