crDroid.net - Download crDroid v7 for OnePlus 5 (cheeseburger)
How to Restore OnePlus 5 Stock Firmware
Restore OnePlus 5T to Stock Firmware and Relock Bootlooader
How to Boot Your OnePlus 5 or 5T into Recovery & Fastboot Mode « Android :: Gadget Hacks
GitHub - JamiKettunen/firmware-mainline-oneplus5: OnePlus 5 (MSM8998) firmware files needed for e.g. Wi-Fi and Bluetooth on the mainline Linux (5.6+) kernel