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(+)
diff --git a/monitor/packet.c b/monitor/packet.c
index 1e9f9d9e4..2d8e15597 100644
--- a/monitor/packet.c
+++ b/monitor/packet.c
@@ -3864,6 +3864,11 @@ void packet_monitor(struct timeval *tv, struct ucred *cred,
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;
--
2.17.1
