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perf data: Fix error return code in perf_data__create_dir() 

[ 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>
This commit is contained in:
Zhen Lei 2021-04-15 16:34:16 +08:00 committed by Greg Kroah-Hartman
parent cbc6b46761
commit ad4659935e
1 changed files with 3 additions and 2 deletions
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5
tools/perf/util/data.c
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@ -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);