Re: BUG: unable to handle kernel NULL pointer dereference in mem_serial_out

Tetsuo Handa
2019-12-13T20:37:51Z

On 2019/12/13 19:00, Dmitry Vyukov wrote:
> Easier said than done. "normal user of the serial port" is not really
> a thing in Linux, right? You either have CAP_SYS_ADMIN or not, that's
> not per-device...
> As far as I remember +Tetsuo proposed a config along the lines of
> "restrict only things that legitimately cause damage under a fuzzer
> workload", e.g. freezing filesystems, disabling console output, etc.
> This may be another candidate. But I can't find where that proposal is
> now.

That suggestion got no response for two months.

https://lkml.kernel.org/r/3e4e2b6b-7828-54ab-cf28-db1a396d7e20@i-love.sakura.ne.jp

Unless we add such kernel config option to upstream kernels, it will become
a whack-a-mole game.