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Message-Id: <20191016214840.491058425@linuxfoundation.org>
Date: Wed, 16 Oct 2019 14:51:01 -0700
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Ian Rogers <irogers@...gle.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Andi Kleen <ak@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Stephane Eranian <eranian@...gle.com>,
Wang Nan <wangnan0@...wei.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 4.19 50/81] perf llvm: Dont access out-of-scope array
From: Ian Rogers <irogers@...gle.com>
commit 7d4c85b7035eb2f9ab217ce649dcd1bfaf0cacd3 upstream.
The 'test_dir' variable is assigned to the 'release' array which is
out-of-scope 3 lines later.
Extend the scope of the 'release' array so that an out-of-scope array
isn't accessed.
Bug detected by clang's address sanitizer.
Fixes: 07bc5c699a3d ("perf tools: Make fetch_kernel_version() publicly available")
Cc: stable@...r.kernel.org # v4.4+
Signed-off-by: Ian Rogers <irogers@...gle.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lore.kernel.org/lkml/20190926220018.25402-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
tools/perf/util/llvm-utils.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -230,14 +230,14 @@ static int detect_kbuild_dir(char **kbui
const char *prefix_dir = "";
const char *suffix_dir = "";
+ /* _UTSNAME_LENGTH is 65 */
+ char release[128];
+
char *autoconf_path;
int err;
if (!test_dir) {
- /* _UTSNAME_LENGTH is 65 */
- char release[128];
-
err = fetch_kernel_version(NULL, release,
sizeof(release));
if (err)
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