lkml.org 
[lkml]   [2015]   [Oct]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2 0/4] x86: sigcontext fixes, again
From
Date
On Wed, 2015-10-28 at 07:37 +0900, Linus Torvalds wrote:
> On Tue, Oct 27, 2015 at 11:05 PM, Stas Sergeev <stsp@list.ru> wrote:
> >
> > I can't easily post an Oops: under X it doesn't even appear -
> > machine freezes immediately, and under non-KMS console it is
> > possible to get one, but difficult to screen-shot (using bare
> > metal, not VM). Also the Oops was seemingly unrelated.
> > And if you run "dosemu -s" under non-KMS console, you'll also
> > reproduce this one:
> > https://bugzilla.kernel.org/show_bug.cgi?id=97321
>
> Hmm. Andrew Morton responded to that initially, but then nothing
> happened, and now it's been another six months. Andrew?
>
> The arch/x86/mm/pat.c error handling does seem to be suspect. This is
> all code several years old, so none of this is new, and I think Suresh
> is gone. Adding a few other people with recent sign-offs to that
> file, in the hope that somebody feels like they own it..

In the case of PFNMAP, the range should always be mapped. So, I wonder why
follow_phys() failed with the !pte_present() check.

Stas, do you have a test program that can reproduce 97321?

-Toshi


\
 
 \ /
  Last update: 2015-10-28 01:21    [W:0.060 / U:1.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site