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| author | Adrian Hunter <adrian.hunter@intel.com> | 2023-03-16 22:41:56 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-04-04 15:39:56 +0300 |
| commit | f5ceb159d30b87975a49b8a230ffa76bae6684b2 (patch) | |
| tree | 799e9a43e84d5a9e583bd4ad68103c07ae2903ac /tools/perf/util/util.c | |
| parent | a2410b579c72242ac0f77b3768093d8c1b48012e (diff) | |
| download | linux-f5ceb159d30b87975a49b8a230ffa76bae6684b2.tar.xz | |
perf tools: Avoid warning in do_realloc_array_as_needed()
do_realloc_array_as_needed() used memcpy() of zero size with a NULL
pointer. Check the size first to avoid sanitize warning.
Discovered using EXTRA_CFLAGS="-fsanitize=undefined -fsanitize=address".
Reported-by: kernel test robot <yujie.liu@intel.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/oe-lkp/202303061424.6ad43294-yujie.liu@intel.com
Link: https://lore.kernel.org/r/20230316194156.8320-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/util.c')
| -rw-r--r-- | tools/perf/util/util.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index b356c9f7f0c3..089208b51e68 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -524,7 +524,8 @@ int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x, size_t msz, new_arr = calloc(new_sz, msz); if (!new_arr) return -ENOMEM; - memcpy(new_arr, *arr, *arr_sz * msz); + if (*arr_sz) + memcpy(new_arr, *arr, *arr_sz * msz); if (init_val) { for (i = *arr_sz; i < new_sz; i++) memcpy(new_arr + (i * msz), init_val, msz); |