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perf inject: 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 f00e589228
commit 79b40a1b18
1 changed files with 3 additions and 3 deletions
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tools/perf/builtin-inject.c
+3 -3
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@@ -1311,10 +1311,10 @@ static void guest_session__exit(struct guest_session *gs)
if (gs->tmp_fd >= 0)
close(gs->tmp_fd);
unlink(gs->tmp_file_name);
free(gs->tmp_file_name);
zfree(&gs->tmp_file_name);
}
free(gs->vcpu);
free(gs->perf_data_file);
zfree(&gs->vcpu);
zfree(&gs->perf_data_file);
}
static void get_tsc_conv(struct perf_tsc_conversion *tc, struct perf_record_time_conv *time_conv)