[sr-dev] git:5.4:98b091d1: seas: check when walking the list

[Daniel-Constantin Mierla]

Module: kamailio
Branch: 5.4
Commit: 98b091d16072bc767affde805c30c7ec4911b9ec
URL: https://github.com/kamailio/kamailio/commit/98b091d16072bc767affde805c30c7ec4911b9ec

Author: Daniel-Constantin Mierla <miconda at gmail.com>
Committer: Daniel-Constantin Mierla <miconda at gmail.com>
Date: 2021-04-15T08:35:23+02:00

seas: check when walking the list

(cherry picked from commit 7231be0785009cb17581822f0765985eb7bdb243)

---

Modified: src/modules/seas/seas_action.c

---

Diff:  https://github.com/kamailio/kamailio/commit/98b091d16072bc767affde805c30c7ec4911b9ec.diff
Patch: https://github.com/kamailio/kamailio/commit/98b091d16072bc767affde805c30c7ec4911b9ec.patch

---

diff --git a/src/modules/seas/seas_action.c b/src/modules/seas/seas_action.c
index cd62848ab0..83be6307d0 100644
--- a/src/modules/seas/seas_action.c
+++ b/src/modules/seas/seas_action.c
@@ -1329,8 +1329,12 @@ int extract_allowed_headers(struct sip_msg *my_msg,int strip_top_vias,int allow_
 	 }else{
 	    assert(rtcnt>0);
 	    rb=hf->parsed;
-	    while(--rtcnt)
+	    while(rb && --rtcnt)
 	       rb=rb->next;
+		if(!rb) {
+			LM_ERR("no rr\n");
+			goto error;
+		}
 	    k= (((rb->nameaddr.name.s) + rb->len)-hf->name.s) ;
 	    if(len+k+CRLF_LEN<headers_len){
 	       memcpy(headers+len,hf->name.s,k);