From 15663e3f37091069b8c98a7fce680dc04bc8e865 Mon Sep 17 00:00:00 2001
From: sauwming <ming@teluu.com>
Date: Tue, 10 Aug 2021 11:53:25 +0800
Subject: [PATCH] Merge pull request from GHSA-2qpg-f6wf-w984

---
 pjnath/src/pjnath/stun_msg.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/pjnath/src/pjnath/stun_msg.c
+++ b/pjnath/src/pjnath/stun_msg.c
@@ -1763,6 +1763,9 @@ static pj_status_t decode_errcode_attr(p
     /* Get pointer to the string in the message */
     value.ptr = ((char*)buf + ATTR_HDR_LEN + 4);
     value.slen = attr->hdr.length - 4;
+    /* Make sure the length is never negative */
+    if (value.slen < 0)
+    	value.slen = 0;
 
     /* Copy the string to the attribute */
     pj_strdup(pool, &attr->reason, &value);