From b123dec934769522407dad619bbb6c2074719884 Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Tue, 13 Apr 2021 09:50:07 +0200
Subject: [PATCH] pike: safety check for ll variable

---
 src/modules/pike/pike_funcs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/modules/pike/pike_funcs.c b/src/modules/pike/pike_funcs.c
index 42fc5172e44..3096928d5d6 100644
--- a/src/modules/pike/pike_funcs.c
+++ b/src/modules/pike/pike_funcs.c
@@ -245,8 +245,10 @@ void clean_routine(unsigned int ticks , void *param)
 
 			/* unlink the node -> the list will get shorter and it will be
 			 * faster for the next branches to process it */
-			ll->prev->prev->next = ll;
-			ll->prev = ll->prev->prev;
+			if(ll) {
+				ll->prev->prev->next = ll;
+				ll->prev = ll->prev->prev;
+			}
 			node->expires = 0;
 			node->timer_ll.prev = node->timer_ll.next = 0;
 			if ( node->flags&NODE_EXPIRED_FLAG )