From: Arnaldo Carvalho de Melo <a...@redhat.com>
[ Upstream commit 7fcdccd4237724931d9773d1e3039bfe053a6f52 ]
When applying a patch by Ian I incorrectly converted to zfree() an
expression that involved testing some other struct member, not the one
being freed, which lead to bugs reproduceable by:
$ perf stat -e i/bs,tsc,L2/o sleep 1
WARNING: multiple event parsing errors
Segmentation fault (core dumped)
$
Fix it by restoring the test for pos->free_str before freeing
pos->val.str, but continue using zfree(&pos->val.str) to set that member
to NULL after freeing it.
Reported-by: Ian Rogers <irog...@google.com>
Fixes: e8dfb81838b1 ("perf parse-events: Fix memory leaks found on
parse_events")
Cc: Adrian Hunter <adrian.hun...@intel.com>
Cc: Alexander Shishkin <alexander.shish...@linux.intel.com>
Cc: Andi Kleen <a...@linux.intel.com>
Cc: clang-built-li...@googlegroups.com
Cc: Jiri Olsa <jo...@kernel.org>
Cc: Leo Yan <leo....@linaro.org>
Cc: Mark Rutland <mark.rutl...@arm.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Stephane Eranian <eran...@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
tools/perf/util/parse-events.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index cce96b05d24c9..426f1984c143e 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1287,7 +1287,8 @@ int parse_events_add_pmu(struct parse_events_state
*parse_state,
list_for_each_entry_safe(pos, tmp, &config_terms, list) {
list_del_init(&pos->list);
- zfree(&pos->val.str);
+ if (pos->free_str)
+ zfree(&pos->val.str);
free(pos);
}
return -EINVAL;
--
2.25.1
