Bluetooth: hci_core: Fix possible buffer overflow

[ Upstream commit 8113716 ]

struct hci_dev_info has a fixed size name[8] field so in the event that
hdev->name is bigger than that strcpy would attempt to write past its
size, so this fixes this problem by switching to use strscpy.

Fixes: dcda165 ("Bluetooth: hci_core: Fix build warnings")
Signed-off-by: Luiz Augusto von Dentz <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

net/bluetooth/hci_core.c

@@ -908,7 +908,7 @@ int hci_get_dev_info(void __user *arg)
 	else
 		flags = hdev->flags;
 
-	strcpy(di.name, hdev->name);
+	strscpy(di.name, hdev->name, sizeof(di.name));
 	di.bdaddr   = hdev->bdaddr;
 	di.type     = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
 	di.flags    = flags;