The following commit has been merged into the perf/urgent branch of tip:

Commit-ID: 7d4c85b7035eb2f9ab217ce649dcd1bfaf0cacd3 Gitweb: https://git.kernel.org/tip/7d4c85b7035eb2f9ab217ce649dcd1bfaf0cacd3 Author: Ian Rogers irogers@google.com AuthorDate: Thu, 26 Sep 2019 15:00:18 -07:00 Committer: Arnaldo Carvalho de Melo acme@redhat.com CommitterDate: Mon, 30 Sep 2019 17:29:35 -03:00

perf llvm: Don't access out-of-scope array

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@vger.kernel.org # v4.4+ Signed-off-by: Ian Rogers irogers@google.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Andi Kleen ak@linux.intel.com Cc: Jiri Olsa jolsa@redhat.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: Stephane Eranian eranian@google.com Cc: Wang Nan wangnan0@huawei.com Link: http://lore.kernel.org/lkml/20190926220018.25402-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com --- tools/perf/util/llvm-utils.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c index 8d04e3d..8b14e4a 100644 --- a/tools/perf/util/llvm-utils.c +++ b/tools/perf/util/llvm-utils.c @@ -233,14 +233,14 @@ static int detect_kbuild_dir(char **kbuild_dir) 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)