[tip:perf/urgent] perf buildid cache: Fix -a segfault related to kcore handling

[tip-bot for Jiri Olsa]

Commit-ID:  eec5a688f426d6fe4097feb0b916ad41803d2ebb
Gitweb:     http://git.kernel.org/tip/eec5a688f426d6fe4097feb0b916ad41803d2ebb
Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Mon, 1 Dec 2014 20:06:27 +0100
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 9 Dec 2014 09:14:34 -0300

perf buildid cache: Fix -a segfault related to kcore handling

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

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1417460789-13874-7-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 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 29f24c0..77d5cae 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -289,7 +289,7 @@ 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 = {
--
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