# HG changeset patch
# User Fabrice Bellet <fabrice@bellet.info>
# Date 1573399795 -3600
# Node ID 0682910c702a4c21c6d49276088cbdaa4e8f49dc
# Parent  e3d3676df7582c70607dee4961b9f8ca455bb2a2
fix heap-use-after-free in prefs removal

diff -r e3d3676df758 -r 0682910c702a libpurple/prefs.c
--- a/libpurple/prefs.c	Wed Dec 18 22:41:28 2019 +0100
+++ b/libpurple/prefs.c	Sun Nov 10 16:29:55 2019 +0100
@@ -789,12 +789,15 @@
 	}
 
 	child = pref->first_child;
+	pref->first_child = NULL;
 	while (child) {
 		struct purple_pref *next;
 		if (child->first_child) {
 			next = child->first_child;
+			child->first_child = NULL;
 		} else if (child->sibling) {
 			next = child->sibling;
+			child->sibling = NULL;
 			free_pref(child);
 		} else {
 			if (child->parent != pref) {