From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnaldo Carvalho de Melo Subject: [PATCH 09/24] perf llvm: Don't access out-of-scope array Date: Tue, 1 Oct 2019 08:12:01 -0300 Message-ID: <20191001111216.7208-10-acme@kernel.org> References: <20191001111216.7208-1-acme@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20191001111216.7208-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Ian Rogers , stable@vger.kernel.org, Alexander Shishkin , Andi Kleen , Jiri Olsa , Peter Zijlstra , Stephane Eranian , Wang Nan , Arnaldo Carvalho de Melo List-Id: linux-perf-users.vger.kernel.org From: Ian Rogers 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 Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Wang Nan Link: http://lore.kernel.org/lkml/20190926220018.25402-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo --- 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 8d04e3d070b1..8b14e4a7f1dc 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) -- 2.21.0