From: Zhen Lei thunder.leizhen@huawei.com
[ Upstream commit f2211881e737cade55e0ee07cf6a26d91a35a6fe ]
Although 'ret' has been initialized to -1, but it will be reassigned by the "ret = open(...)" statement in the for loop. So that, the value of 'ret' is unknown when asprintf() failed.
Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Zhen Lei thunder.leizhen@huawei.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Jiri Olsa jolsa@redhat.com Cc: Mark Rutland mark.rutland@arm.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Link: http://lore.kernel.org/lkml/20210415083417.3740-1-thunder.leizhen@huawei.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/util/data.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index f29af4fc3d09..8fca4779ae6a 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -35,7 +35,7 @@ void perf_data__close_dir(struct perf_data *data) int perf_data__create_dir(struct perf_data *data, int nr) { struct perf_data_file *files = NULL; - int i, ret = -1; + int i, ret;
if (WARN_ON(!data->is_dir)) return -EINVAL; @@ -51,7 +51,8 @@ int perf_data__create_dir(struct perf_data *data, int nr) for (i = 0; i < nr; i++) { struct perf_data_file *file = &files[i];
- if (asprintf(&file->path, "%s/data.%d", data->path, i) < 0) + ret = asprintf(&file->path, "%s/data.%d", data->path, i); + if (ret < 0) goto out_err;
ret = open(file->path, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);