From: Leo Yan leo.yan@linaro.org
[ Upstream commit c74b05030edb3b52f4208d8415b8c933bc509a29 ]
Based on the following report from Smatch, fix the use-after-freed pointer.
tools/perf/builtin-stat.c:1353 add_default_attributes() warn: passing freed memory 'str'.
The pointer 'str' has been freed but later it is still passed into the function parse_events_print_error(). This patch fixes this use-after-freed issue.
Signed-off-by: Leo Yan leo.yan@linaro.org Acked-by: Jiri Olsa jolsa@kernel.org Cc: Adrian Hunter adrian.hunter@intel.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Alexey Budankov alexey.budankov@linux.intel.com Cc: Alexios Zavras alexios.zavras@intel.com Cc: Andi Kleen ak@linux.intel.com Cc: Changbin Du changbin.du@intel.com Cc: Davidlohr Bueso dave@stgolabs.net Cc: David S. Miller davem@davemloft.net Cc: Eric Saint-Etienne eric.saint.etienne@oracle.com Cc: Jin Yao yao.jin@linux.intel.com Cc: Konstantin Khlebnikov khlebnikov@yandex-team.ru Cc: linux-arm-kernel@lists.infradead.org Cc: Mathieu Poirier mathieu.poirier@linaro.org Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: Rasmus Villemoes linux@rasmusvillemoes.dk Cc: Song Liu songliubraving@fb.com Cc: Suzuki Poulouse suzuki.poulose@arm.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Thomas Richter tmricht@linux.ibm.com Link: http://lkml.kernel.org/r/20190702103420.27540-3-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/builtin-stat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 1ae66f09dc7d..e28002d90573 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -1276,8 +1276,8 @@ static int add_default_attributes(void) fprintf(stderr, "Cannot set up top down events %s: %d\n", str, err); - free(str); parse_events_print_error(&errinfo, str); + free(str); return -1; } } else {