Messages in this thread Patch in this message | | | From | Valentin Schneider <> | Subject | [PATCH 2/4] tracing/filters: Fix double-free of struct filter_pred.mask | Date | Fri, 1 Sep 2023 17:10:37 +0200 |
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When a cpulist filter is found to contain a single CPU, that CPU is saved as a scalar and the backing cpumask storage is freed.
Also NULL the mask to avoid a double-free once we get down to free_predicate().
Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Valentin Schneider <vschneid@redhat.com> --- kernel/trace/trace_events_filter.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index c06e1d596f4b9..eb331e8b00b61 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -1773,6 +1773,7 @@ static int parse_pred(const char *str, void *data, if (single) { pred->val = cpumask_first(pred->mask); kfree(pred->mask); + pred->mask = NULL; } if (field->filter_type == FILTER_CPUMASK) { -- 2.31.1
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