Will DormannDec 9, 2024

Back when I was poking around with filesystem fuzzing stuff years back, I noticed something odd:

An EXT filesystem can tell the Linux OS how it should behave "if" the filesystem is corrupt, including triggering a kernel panic. In a world where USB thumb drives exist, this seems... not ideal.

Let's see what happens if we plug such a mass storage device into a fully patched Chromebook in 2024...

Oh.

Show threadTerence Eden
@wdormann given that some devices will boot from USB if present, would it be possible to make a stick which causes the OS to panic, but the UEFI to mount & run?
Dec 10, 2024 at 1:44pmWeb
Show threadMatthew GarrettDec 10, 2024
@Edent @wdormann Not terribly usefully on anything with secure boot
Show threadHenryk PlötzDec 10, 2024
@mjg59 Slightly useful on public-terminal-like devices with no/restricted input.