Re: mm: NULL ptr deref in remove_migration_pte

2014-06-18 Thread Sasha Levin
On 06/17/2014 11:36 PM, Hugh Dickins wrote: > On Mon, 16 Jun 2014, Sasha Levin wrote: >> On 06/10/2014 12:20 AM, Hugh Dickins wrote: >>> Although there's nothing in the backtrace to implicate it, >>> I think this crash is caused by THP: please try this patch - thanks. >>> >>> [PATCH] mm: let

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-18 Thread Sasha Levin
On 06/17/2014 11:36 PM, Hugh Dickins wrote: On Mon, 16 Jun 2014, Sasha Levin wrote: On 06/10/2014 12:20 AM, Hugh Dickins wrote: Although there's nothing in the backtrace to implicate it, I think this crash is caused by THP: please try this patch - thanks. [PATCH] mm: let mm_find_pmd fix

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-17 Thread Hugh Dickins
On Mon, 16 Jun 2014, Sasha Levin wrote: > On 06/10/2014 12:20 AM, Hugh Dickins wrote: > > Although there's nothing in the backtrace to implicate it, > > I think this crash is caused by THP: please try this patch - thanks. > > > > [PATCH] mm: let mm_find_pmd fix buggy race with THP fault ... > >

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-17 Thread Christoph Lameter
On Mon, 16 Jun 2014, Sasha Levin wrote: > It took some time to hit something here, but I think that the following > is related: This related thing looks like someone did a random memset. The SLUB diagnostic show the object, redzone and padding were overwritten with zeros. > [ 494.710068] >

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-17 Thread Christoph Lameter
On Mon, 16 Jun 2014, Sasha Levin wrote: It took some time to hit something here, but I think that the following is related: This related thing looks like someone did a random memset. The SLUB diagnostic show the object, redzone and padding were overwritten with zeros. [ 494.710068]

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-17 Thread Hugh Dickins
On Mon, 16 Jun 2014, Sasha Levin wrote: On 06/10/2014 12:20 AM, Hugh Dickins wrote: Although there's nothing in the backtrace to implicate it, I think this crash is caused by THP: please try this patch - thanks. [PATCH] mm: let mm_find_pmd fix buggy race with THP fault ... It took

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-16 Thread Sasha Levin
On 06/10/2014 12:20 AM, Hugh Dickins wrote: > On Tue, 27 May 2014, Sasha Levin wrote: >> > On 05/26/2014 04:05 PM, Hugh Dickins wrote: >>> > > On Fri, 23 May 2014, Sasha Levin wrote: >>> > > > >> Ping? > >> > >> On 05/05/2014 11:51 AM, Sasha Levin wrote: > > >>> Did anyone have

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-16 Thread Sasha Levin
On 06/10/2014 12:20 AM, Hugh Dickins wrote: On Tue, 27 May 2014, Sasha Levin wrote: On 05/26/2014 04:05 PM, Hugh Dickins wrote: On Fri, 23 May 2014, Sasha Levin wrote: Ping? On 05/05/2014 11:51 AM, Sasha Levin wrote: Did anyone have a chance to look at it? I still see it in

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-10 Thread Kirill A. Shutemov
On Mon, Jun 09, 2014 at 09:20:33PM -0700, Hugh Dickins wrote: > [PATCH] mm: let mm_find_pmd fix buggy race with THP fault > > Trinity has reported: > BUG: unable to handle kernel NULL pointer dereference at 0018 > IP: __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1)) >

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-10 Thread Kirill A. Shutemov
On Mon, Jun 09, 2014 at 09:20:33PM -0700, Hugh Dickins wrote: [PATCH] mm: let mm_find_pmd fix buggy race with THP fault Trinity has reported: BUG: unable to handle kernel NULL pointer dereference at 0018 IP: __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1)) CPU: 6

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-09 Thread Hugh Dickins
On Tue, 27 May 2014, Sasha Levin wrote: > On 05/26/2014 04:05 PM, Hugh Dickins wrote: > > On Fri, 23 May 2014, Sasha Levin wrote: > > > >> Ping? > >> > >> On 05/05/2014 11:51 AM, Sasha Levin wrote: > >>> Did anyone have a chance to look at it? I still see it in -next. > >>> > >>> > >>> Thanks, >

Re: mm: NULL ptr deref in remove_migration_pte

2014-06-09 Thread Hugh Dickins
On Tue, 27 May 2014, Sasha Levin wrote: On 05/26/2014 04:05 PM, Hugh Dickins wrote: On Fri, 23 May 2014, Sasha Levin wrote: Ping? On 05/05/2014 11:51 AM, Sasha Levin wrote: Did anyone have a chance to look at it? I still see it in -next. Thanks, Sasha On 04/16/2014 10:59

Re: mm: NULL ptr deref in remove_migration_pte

2014-05-27 Thread Sasha Levin
On 05/26/2014 04:05 PM, Hugh Dickins wrote: > On Fri, 23 May 2014, Sasha Levin wrote: > >> Ping? >> >> On 05/05/2014 11:51 AM, Sasha Levin wrote: >>> Did anyone have a chance to look at it? I still see it in -next. >>> >>> >>> Thanks, >>> Sasha >>> >>> On 04/16/2014 10:59 AM, Sasha Levin wrote:

Re: mm: NULL ptr deref in remove_migration_pte

2014-05-27 Thread Sasha Levin
On 05/26/2014 04:05 PM, Hugh Dickins wrote: On Fri, 23 May 2014, Sasha Levin wrote: Ping? On 05/05/2014 11:51 AM, Sasha Levin wrote: Did anyone have a chance to look at it? I still see it in -next. Thanks, Sasha On 04/16/2014 10:59 AM, Sasha Levin wrote: Hi all, While fuzzing with

Re: mm: NULL ptr deref in remove_migration_pte

2014-05-26 Thread Hugh Dickins
On Fri, 23 May 2014, Sasha Levin wrote: > Ping? > > On 05/05/2014 11:51 AM, Sasha Levin wrote: > > Did anyone have a chance to look at it? I still see it in -next. > > > > > > Thanks, > > Sasha > > > > On 04/16/2014 10:59 AM, Sasha Levin wrote: > >> Hi all, > >> > >> While fuzzing with

Re: mm: NULL ptr deref in remove_migration_pte

2014-05-26 Thread Hugh Dickins
On Fri, 23 May 2014, Sasha Levin wrote: Ping? On 05/05/2014 11:51 AM, Sasha Levin wrote: Did anyone have a chance to look at it? I still see it in -next. Thanks, Sasha On 04/16/2014 10:59 AM, Sasha Levin wrote: Hi all, While fuzzing with trinity inside a KVM tools guest

Re: mm: NULL ptr deref in remove_migration_pte

2014-05-23 Thread Sasha Levin
Ping? On 05/05/2014 11:51 AM, Sasha Levin wrote: > Did anyone have a chance to look at it? I still see it in -next. > > > Thanks, > Sasha > > On 04/16/2014 10:59 AM, Sasha Levin wrote: >> Hi all, >> >> While fuzzing with trinity inside a KVM tools guest running latest -next >> kernel I've

Re: mm: NULL ptr deref in remove_migration_pte

2014-05-23 Thread Sasha Levin
Ping? On 05/05/2014 11:51 AM, Sasha Levin wrote: Did anyone have a chance to look at it? I still see it in -next. Thanks, Sasha On 04/16/2014 10:59 AM, Sasha Levin wrote: Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've stumbled on the

Re: mm: NULL ptr deref in remove_migration_pte

2014-05-05 Thread Sasha Levin
Did anyone have a chance to look at it? I still see it in -next. Thanks, Sasha On 04/16/2014 10:59 AM, Sasha Levin wrote: > Hi all, > > While fuzzing with trinity inside a KVM tools guest running latest -next > kernel I've stumbled on the following: > > [ 2552.313602] BUG: unable to handle

Re: mm: NULL ptr deref in remove_migration_pte

2014-05-05 Thread Sasha Levin
Did anyone have a chance to look at it? I still see it in -next. Thanks, Sasha On 04/16/2014 10:59 AM, Sasha Levin wrote: Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've stumbled on the following: [ 2552.313602] BUG: unable to handle kernel

mm: NULL ptr deref in remove_migration_pte

2014-04-16 Thread Sasha Levin
Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've stumbled on the following: [ 2552.313602] BUG: unable to handle kernel NULL pointer dereference at 0018 [ 2552.315878] IP: __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1)) [

mm: NULL ptr deref in remove_migration_pte

2014-04-16 Thread Sasha Levin
Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've stumbled on the following: [ 2552.313602] BUG: unable to handle kernel NULL pointer dereference at 0018 [ 2552.315878] IP: __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1)) [