[PATCH 6/8] perf buildid cache: Fix -a segfault

[Jiri Olsa <jolsa@kernel.org>]

The kcore_filename is uninitialized and trash value could
trigger build_id_cache__add_kcore function ending up with
segfault.

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/builtin-buildid-cache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 184955ec8a83..7a3504a1b494 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -737,7 +737,7 @@ int cmd_buildid_cache(int argc, const char **argv,
 		   *remove_name_list_str = NULL,
 		   *missing_filename = NULL,
 		   *update_name_list_str = NULL,
-		   *kcore_filename;
+		   *kcore_filename = NULL;
 	char sbuf[STRERR_BUFSIZE];
 
 	struct perf_data_file file = {
-- 
1.9.3