From 134fcbd3b2fbb91e4206cceb1de9d1a3a0690ef6 Mon Sep 17 00:00:00 2001
From: IMS root <root@IMS>
Date: Tue, 19 Jul 2016 18:07:17 +0200
Subject: [PATCH] presence: fix potential double free in shutdown routine

---
 modules/presence/hash.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/modules/presence/hash.c b/modules/presence/hash.c
index 5c302911734..50657e0a4e3 100644
--- a/modules/presence/hash.c
+++ b/modules/presence/hash.c
@@ -318,9 +318,14 @@ int delete_shtable(shtable_t htable,unsigned int hash_code,subs_t* subs)
 		{
 			found= s->local_cseq +1;
 			ps->next= s->next;
-			if(s->contact.s!=NULL)
+			if(s->contact.s!=NULL) {
 				shm_free(s->contact.s);
-			shm_free(s);
+				s->contact.s = NULL;
+			}
+			if (s) {
+				shm_free(s);
+				s = NULL;
+			}
 			break;
 		}
 		ps= s;