lkml.org 
[lkml]   [2018]   [Apr]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: usercopy whitelist woe in scsi_sense_cache
From
Date
On 2018-04-04 04:32 PM, Kees Cook wrote:
> On Wed, Apr 4, 2018 at 12:07 PM, Oleksandr Natalenko
> <oleksandr@natalenko.name> 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 ....

\
 
 \ /
  Last update: 2018-04-04 22:47    [W:0.083 / U:10.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site