lkml.org 
[lkml]   [2011]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.39-rc5-git2 boot crashs
On Fri, Apr 29, 2011 at 07:47:14PM -0700, Linus Torvalds wrote:
> On Fri, Apr 29, 2011 at 7:31 PM, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> >
> > It looks like a NULL pointer dereference with offset 4, so at a guess,
> > super->s_freeing_list.next is NULL, and it's the "next->prev = entry"
> > instruction that faults when inserting into that list.
> >
> > How/why would s_freeing_list be NULL? I have no idea. But it looks
> > like a failed mount, so presumably it was never initialized.
>
> Hmm. super->s_freeing_list is initialized pretty late in
> logfs_read_sb(), and any error path _before_ that point will result in
> a "goto err1" in logfs_get_sb_device() which will do various iputs
> etc. All without that list initialized. That would seem to be the
> cause of this, possibly triggered by Al's changes to ->mount from
> read_super.

Then it ought to be reproducible with much ealier kernels. Say, 2.6.37 or
so... That part of ->mount() series went in during last Autumn...


\
 
 \ /
  Last update: 2011-04-30 04:59    [W:0.070 / U:0.716 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site