File 0009-btmon-fix-segfault-caused-by-buffer-over-read.patch of Package bluez.25541

From e63175ecf66f682721f2ba0337f65330aa798744 Mon Sep 17 00:00:00 2001
From: Matias Karhumaa <matias.karhumaa@gmail.com>
Date: Tue, 16 Oct 2018 23:23:47 +0300
Subject: [PATCH 09/13] btmon: fix segfault caused by buffer over-read

Fix segfault caused by buffer over-read in btmon. Fix is to check in
packet_monitor() that index is not bigger than MAX_INDEX before accessing
index_list.

Crash was found by fuzzing btmon with AFL.
---
 monitor/packet.c | 5 +++++
 1 file changed, 5 insertions(+)

Index: bluez-5.48/monitor/packet.c
===================================================================
--- bluez-5.48.orig/monitor/packet.c
+++ bluez-5.48/monitor/packet.c
@@ -3929,6 +3929,11 @@ void packet_monitor(struct timeval *tv,
 		index_current = index;
 	}
 
+	if (index != HCI_DEV_NONE && index > MAX_INDEX) {
+		print_field("Invalid index (%d)", index);
+		return;
+	}
+
 	if (tv && time_offset == ((time_t) -1))
 		time_offset = tv->tv_sec;