lkml.org 
[lkml]   [2011]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [Stable-review] [34-longterm 224/247] fs/partitions/ldm.c: fix oops caused by corrupted partition table
From
Date
On Thu, 2011-06-23 at 13:34 -0400, Paul Gortmaker wrote:
> From: Timo Warns <Warns@pre-sense.de>
>
> -------------------
> This is a commit scheduled for the next v2.6.34 longterm release.
> If you see a problem with using this for longterm, please comment.
> -------------------
>
> commit c340b1d640001c8c9ecff74f68fd90422ae2448a upstream.
>
> The kernel automatically evaluates partition tables of storage devices.
> The code for evaluating LDM partitions (in fs/partitions/ldm.c) contains
> a bug that causes a kernel oops on certain corrupted LDM partitions.
> A kernel subsystem seems to crash, because, after the oops, the kernel no
> longer recognizes newly connected storage devices.
>
> The patch validates the value of vblk_size.
[...]

This doesn't completely fix the possibility of a buffer overflow. You
also need commit cae13fe4cc3f24820ffb990c09110626837e85d4.

Ben.

--
Ben Hutchings
The two most common things in the universe are hydrogen and stupidity.
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2011-06-24 01:17    [W:0.607 / U:0.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site