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perf record: Fix possible incorrect free in record__switch_output()
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>
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@ -1830,8 +1830,8 @@ static int
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record__switch_output(struct record *rec, bool at_exit)
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record__switch_output(struct record *rec, bool at_exit)
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{
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{
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struct perf_data *data = &rec->data;
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struct perf_data *data = &rec->data;
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char *new_filename = NULL;
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int fd, err;
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int fd, err;
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char *new_filename;
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/* Same Size: "2015122520103046"*/
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/* Same Size: "2015122520103046"*/
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char timestamp[] = "InvalidTimestamp";
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char timestamp[] = "InvalidTimestamp";
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