From cc127a999cf66cd76bbdeea6ecab5e1b6b8afc55 Mon Sep 17 00:00:00 2001
From: "Joshua C. Colp" <jcolp@sangoma.com>
Date: Tue, 9 Mar 2021 20:35:08 -0400
Subject: [PATCH] channel: Fix crash in suppress API.

There exists an inconsistency with framehook usage
such that it is only on reads that the frame should
be freed, not on writes as well.

ASTERISK-29071

Change-Id: I5ef918ebe4debac8a469e8d43bf9d6b673e8e472
---
 main/channel.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/main/channel.c b/main/channel.c
index 3d6fae64d3..e92eaf8bb2 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -10845,7 +10845,9 @@ static struct ast_frame *suppress_framehook_event_cb(struct ast_channel *chan, s
 	if (suppress_frame) {
 		switch (frame->frametype) {
 		case AST_FRAME_VOICE:
-			ast_frfree(frame);
+			if (event == AST_FRAMEHOOK_EVENT_READ) {
+				ast_frfree(frame);
+			}
 			frame = &ast_null_frame;
 			break;
 		default: