Don't crash when filter_same() gets called on FILTER_ACCEPT or FILTER_REJECT.

1 files changed, 5 insertions, 0 deletions

diff --git a/filter/filter.c b/filter/filter.c
index 3bb21e68..5faabfef 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -557,5 +557,10 @@ filters_postconfig(void)
 int
 filter_same(struct filter *new, struct filter *old)
 {
+  if (old == new)	/* Handle FILTER_ACCEPT and FILTER_REJECT */
+    return 1;
+  if (old == FILTER_ACCEPT || old == FILTER_REJECT ||
+      new == FILTER_ACCEPT || new == FILTER_REJECT)
+    return 0;
   return i_same(new->root, old->root);
 }