Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 kernel/events/core.c |   56 ++++++++++++++++++++-------------------------------
 1 file changed, 22 insertions(+), 34 deletions(-)

--- a/kernel/events/core.c
+++ b/kernel/events/core.c

@@ -10495,6 +10495,8 @@ static void free_filters_list(struct lis
 	}
 }
 
+DEFINE_FREE(filter_list, struct list_head *, if (_T) free_filters_list(_T))
+
 /*
  * Free existing address filters and optionally install new ones
  */

@@ -10658,13 +10660,15 @@ perf_event_parse_addr_filter(struct perf
 			     struct list_head *filters)
 {
 	struct perf_addr_filter *filter = NULL;
-	char *start, *orig, *filename = NULL;
 	substring_t args[MAX_OPT_ARGS];
 	int state = IF_STATE_ACTION, token;
 	unsigned int kernel = 0;
-	int ret = -EINVAL;
+	char *start;
+	int ret;
 
-	orig = fstr = kstrdup(fstr, GFP_KERNEL);
+	struct list_head *fguard __free(filter_list) = filters;
+	char *filename __free(kfree) = NULL;
+	char *orig __free(kfree) = fstr = kstrdup(fstr, GFP_KERNEL);