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Message-Id: <20190729190759.928908021@linuxfoundation.org>
Date: Mon, 29 Jul 2019 21:21:56 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Leo Yan <leo.yan@...aro.org>,
Jiri Olsa <jolsa@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Alexey Budankov <alexey.budankov@...ux.intel.com>,
Alexios Zavras <alexios.zavras@...el.com>,
Andi Kleen <ak@...ux.intel.com>,
Changbin Du <changbin.du@...el.com>,
Davidlohr Bueso <dave@...olabs.net>,
"David S. Miller" <davem@...emloft.net>,
Eric Saint-Etienne <eric.saint.etienne@...cle.com>,
Jin Yao <yao.jin@...ux.intel.com>,
Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
linux-arm-kernel@...ts.infradead.org,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Song Liu <songliubraving@...com>,
Suzuki Poulouse <suzuki.poulose@....com>,
Thomas Gleixner <tglx@...utronix.de>,
Thomas Richter <tmricht@...ux.ibm.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.2 120/215] perf stat: Fix use-after-freed pointer detected by the smatch tool
[ 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@...aro.org>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc: Alexios Zavras <alexios.zavras@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Changbin Du <changbin.du@...el.com>
Cc: Davidlohr Bueso <dave@...olabs.net>
Cc: David S. Miller <davem@...emloft.net>
Cc: Eric Saint-Etienne <eric.saint.etienne@...cle.com>
Cc: Jin Yao <yao.jin@...ux.intel.com>
Cc: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rasmus Villemoes <linux@...musvillemoes.dk>
Cc: Song Liu <songliubraving@...com>
Cc: Suzuki Poulouse <suzuki.poulose@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Thomas Richter <tmricht@...ux.ibm.com>
Link: http://lkml.kernel.org/r/20190702103420.27540-3-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.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 {
--
2.20.1
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