From: Naveen Albert <asterisk@phreaknet.org>
Date: Sat, 10 Sep 2022 15:15:08 +0000 (+0000)
Subject: func_scramble: Fix null pointer dereference.
X-Git-Tag: 18.16.0-rc1~72
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=22b46f2a151bc17eccc460649a6c70c551cd4513;p=thirdparty%2Fasterisk.git

func_scramble: Fix null pointer dereference.

Fix segfault due to null pointer dereference
inside the audiohook callback.

ASTERISK-30220 #close

Change-Id: Ideb80f606974366e89d619d908744230b5a5a259
---

diff --git a/funcs/func_scramble.c b/funcs/func_scramble.c
index 5fe194cd15..e055b2dc8a 100644
--- a/funcs/func_scramble.c
+++ b/funcs/func_scramble.c
@@ -125,6 +125,7 @@ static int scramble_callback(struct ast_audiohook *audiohook, struct ast_channel
 	}
 
 	if (frame->frametype == AST_FRAME_VOICE) { /* only invert voice frequencies */
+		ni = datastore->data;
 		/* Based on direction of frame, and confirm it is applicable */
 		if (!(direction == AST_AUDIOHOOK_DIRECTION_READ ? ni->rx : ni->tx)) {
 			return 0;