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perf tests api-io: Use zfree() to reduce chances of use after free

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Do defensive programming by using zfree() to initialize freed pointers
to NULL, so that eventual use after free result in a NULL pointer deref
instead of more subtle behaviour.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2023-04-12 09:50:08 -03:00
parent 97d0dd1e28
commit 9ccbc21166
1 changed files with 2 additions and 1 deletions
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3
tools/perf/tests/api-io.c
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@ -12,6 +12,7 @@
#include "tests.h"
#include <api/io.h>
#include <linux/kernel.h>
#include <linux/zalloc.h>
#define TEMPL "/tmp/perf-test-XXXXXX"
@ -79,7 +80,7 @@ static int setup_test(char path[PATH_MAX], const char *contents,
static void cleanup_test(char path[PATH_MAX], struct io *io)
{
free(io->buf);
zfree(&io->buf);
close(io->fd);
unlink(path);
}