From 5b46310488bd71e01cfc86342acd4239b7d4e7a3 Mon Sep 17 00:00:00 2001
From: Sean Bright <sean.bright@gmail.com>
Date: Fri, 11 Dec 2020 15:49:48 -0500
Subject: [PATCH] res_rtp_asterisk.c: Fix signed mismatch that leads to overflow

ASTERISK-29205 #close

Change-Id: Ib7aa65644e8df76e2378d7613ee7cf751b9d0bea
---

diff --git a/res/res_rtp_asterisk.c b/res/res_rtp_asterisk.c
index 6004a2f..aed7a89 100644
--- a/res/res_rtp_asterisk.c
+++ b/res/res_rtp_asterisk.c
@@ -6771,7 +6771,7 @@
 			/* If there is no more room left for storing packets stop now, we leave 20
 			 * extra bits at the end just in case.
 			 */
-			if ((sizeof(bdata) - (packet_len + delta_len + 20)) < 0) {
+			if (packet_len + delta_len + 20 > sizeof(bdata)) {
 				res = -1;
 				break;
 			}
@@ -6805,7 +6805,7 @@
 		previous_packet = statistics;
 
 		/* If there is no more room left in the packet stop handling of any subsequent packets */
-		if ((sizeof(bdata) - (packet_len + delta_len + 20)) < 0) {
+		if (packet_len + delta_len + 20 > sizeof(bdata)) {
 			break;
 		}
 	}