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perf record: Fix possible incorrect free in record__switch_output()

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[ Upstream commit aff10a1652 ]

perf_data__switch() may not assign a legal value to 'new_filename'.
In this case, 'new_filename' uses the on-stack value, which may cause a
incorrect free and unexpected result.

Fixes: 03724b2e9c ("perf record: Allow to limit number of reported perf.data files")
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240119040304.3708522-2-yangjihong1@huawei.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Jihong 2024-01-19 04:03:02 +00:00 committed by Sasha Levin
parent a0188ea3dc
commit 27ee265043
1 changed files with 1 additions and 1 deletions
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2
tools/perf/builtin-record.c
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@ -1830,8 +1830,8 @@ static int
record__switch_output(struct record *rec, bool at_exit)
{
struct perf_data *data = &rec->data;
char *new_filename = NULL;
int fd, err;
char *new_filename;
/* Same Size: "2015122520103046"*/
char timestamp[] = "InvalidTimestamp";