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

2018-11-21 Thread Kyungtae Kim
Ah, I got that. Thanks. Kyungtae

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

2018-11-21 Thread Dmitry Vyukov
On Wed, Nov 21, 2018 at 11:11 AM, Kyungtae Kim wrote: > Thank you for your reply. > But I think this kind of crash can occur in real PC as well, and I'm > just thinking of some way to stop it in the first place (if possible). > because malicious users can use this, so as to make the whole system >

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

2018-11-21 Thread Kyungtae Kim
Thank you for your reply. But I think this kind of crash can occur in real PC as well, and I'm just thinking of some way to stop it in the first place (if possible). because malicious users can use this, so as to make the whole system (kernel) work incorrectly. Thanks, Kyungtae

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

2018-11-20 Thread Arnd Bergmann
On Tue, Nov 13, 2018 at 9:24 AM Kyungtae Kim wrote: > > We report a bug in v4.19-rc8 (4.20-rc1 as well): > > kernel config: https://kt0755.github.io/etc/config-4.19-rc2.kmsan > repro: https://kt0755.github.io/etc/repro.e3752.c > > This happens during data transition from user-supplied buffer to po