Re: usercopy whitelist woe in scsi_sense_cache

[Douglas Gilbert]

On 2018-04-04 04:32 PM, Kees Cook wrote:
> On Wed, Apr 4, 2018 at 12:07 PM, Oleksandr Natalenko
> <oleksandr@xxxxxxxxxxxxxx> wrote:
> > [  261.262135] Bad or missing usercopy whitelist? Kernel memory exposure
> > attempt detected from SLUB object 'scsi_sense_cache' (offset 94, size 22)!
> > I can easily reproduce it with a qemu VM and 2 virtual SCSI disks by calling
> > smartctl in a loop and doing some usual background I/O. The warning is
> > triggered within 3 minutes or so (not instantly).
>
> Also:
>
> Can you send me your .config? What SCSI drivers are you using in the
> VM and on the real server?
>
> Are you able to see what ioctl()s smartctl is issuing? I'll try to
> reproduce this on my end...

smartctl -r scsiioctl,3 ....