Commit 8f5abc38 authored Oct 10, 2023 by Edward AD Committed by Greg Kroah-Hartman Oct 25, 2023

Bluetooth: hci_sock: fix slab oob read in create_monitor_event

commit 18f547f3fc074500ab5d419cf482240324e73a7e upstream.

When accessing hdev->name, the actual string length should prevail

Reported-by: <syzbot+c90849c50ed209d77689@syzkaller.appspotmail.com>
Fixes: dcda165706b9 ("Bluetooth: hci_core: Fix build warnings")
Signed-off-by: Edward AD <twuufnxlz@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 2c8544a0

net/bluetooth/hci_sock.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -430,7 +430,7 @@ static struct sk_buff create_monitor_event(struct hci_dev hdev, int event)
		ni->type = hdev->dev_type;
		ni->bus = hdev->bus;
		bacpy(&ni->bdaddr, &hdev->bdaddr);
		memcpy(ni->name, hdev->name, 8);
		memcpy(ni->name, hdev->name, strlen(hdev->name));

		opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
		break;