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Subject[PATCH 1/1] perf probe:fix sigsegv in adding nonexistent event
Date
From: Furat Afram <furat.afram@gmail.com>

pref probe crashes when trying to add nonexistent event

Signed-off-by: Furat Afram <furat.afram@gmail.com>
---
tools/perf/util/symbol.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 40eeaf0..ad0c79b 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -636,14 +636,18 @@ static int dso__load_all_kallsyms(struct dso *dso, const char *filename,
static int dso__split_kallsyms(struct dso *dso, struct map *map,
symbol_filter_t filter)
{
- struct map_groups *kmaps = map__kmap(map)->kmaps;
- struct machine *machine = kmaps->machine;
+ struct map_groups *kmaps;
+ struct machine *machine;
struct map *curr_map = map;
struct symbol *pos;
int count = 0, moved = 0;
struct rb_root *root = &dso->symbols[map->type];
struct rb_node *next = rb_first(root);
int kernel_range = 0;
+ kmaps = map__kmap(map)->kmaps;
+ if (kmaps == NULL)
+ return -1;
+ machine = kmaps->machine;

while (next) {
char *module;
--
1.7.6.4


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