Re: btrfs rare silent data corruption with kernel data leak (updated with some bisection results)

2016-10-08 Thread Zygo Blaxell
On Sat, Oct 08, 2016 at 03:02:00AM -0400, Zygo Blaxell wrote: > On Sat, Oct 08, 2016 at 02:10:08AM -0400, Zygo Blaxell wrote: > [...] > > The "write half" of the bug seems to appear first somewhere between v3.8 > > and v3.9. I have not been able to reproduce it with v3.8.13, v3.7.10, or > > v3.6.1

Re: btrfs rare silent data corruption with kernel data leak (updated with some bisection results)

2016-10-08 Thread Zygo Blaxell
On Sat, Oct 08, 2016 at 02:10:08AM -0400, Zygo Blaxell wrote: [...] > The "write half" of the bug seems to appear first somewhere between v3.8 > and v3.9. I have not been able to reproduce it with v3.8.13, v3.7.10, or > v3.6.11. I can reproduce it in v3.9.11, v3.12.64, and v3.18.13..v4.7.5. Afte

Re: btrfs rare silent data corruption with kernel data leak (updated with some bisection results)

2016-10-07 Thread Zygo Blaxell
(continuing from https://www.spinics.net/lists/linux-btrfs/msg59251.html) I'm still poking at this bug, and found out some more about it. Recall that this bug seems to have two parts which together cause data corruption: The "write half" of the bug writes a questionable extent structure in the fi

Re: btrfs rare silent data corruption with kernel data leak

2016-09-23 Thread Zygo Blaxell
On Thu, Sep 22, 2016 at 04:42:06PM -0400, Chris Mason wrote: > On 09/21/2016 07:14 AM, Paul Jones wrote: > >>-Original Message- > >>From: linux-btrfs-ow...@vger.kernel.org [mailto:linux-btrfs- > >>ow...@vger.kernel.org] On Behalf Of Zygo Blaxell > >>Sent: Wednesday, 21 September 2016 2:56 P

Re: btrfs rare silent data corruption with kernel data leak

2016-09-22 Thread Chris Mason
On 09/21/2016 07:14 AM, Paul Jones wrote: -Original Message- From: linux-btrfs-ow...@vger.kernel.org [mailto:linux-btrfs- ow...@vger.kernel.org] On Behalf Of Zygo Blaxell Sent: Wednesday, 21 September 2016 2:56 PM To: linux-btrfs@vger.kernel.org Subject: btrfs rare silent data corruption

Re: btrfs rare silent data corruption with kernel data leak

2016-09-22 Thread Christoph Anton Mitterer
On Thu, 2016-09-22 at 19:49 +0200, Kai Krakow wrote: > I think mysql data files > have > their own checksumming Last time I've checked it, none of the major DBs or VM-image formats had this... postgresql being the only one supporting something close to fs level csumming (but again not per default).

Re: btrfs rare silent data corruption with kernel data leak

2016-09-22 Thread Kai Krakow
Am Wed, 21 Sep 2016 09:02:09 -0400 schrieb Zygo Blaxell : > On Wed, Sep 21, 2016 at 11:14:35AM +, Paul Jones wrote: > > > -Original Message- > > > From: linux-btrfs-ow...@vger.kernel.org [mailto:linux-btrfs- > > > ow...@vger.kernel.org] On Behalf Of Zygo Blaxell > > > Sent: Wednesday,

Re: btrfs rare silent data corruption with kernel data leak

2016-09-21 Thread Zygo Blaxell
On Wed, Sep 21, 2016 at 11:14:35AM +, Paul Jones wrote: > > -Original Message- > > From: linux-btrfs-ow...@vger.kernel.org [mailto:linux-btrfs- > > ow...@vger.kernel.org] On Behalf Of Zygo Blaxell > > Sent: Wednesday, 21 September 2016 2:56 PM > > To: linux-btrfs@vger.kernel.org > > Sub

RE: btrfs rare silent data corruption with kernel data leak

2016-09-21 Thread Paul Jones
> -Original Message- > From: linux-btrfs-ow...@vger.kernel.org [mailto:linux-btrfs- > ow...@vger.kernel.org] On Behalf Of Zygo Blaxell > Sent: Wednesday, 21 September 2016 2:56 PM > To: linux-btrfs@vger.kernel.org > Subject: btrfs rare silent data corruption with kernel data leak > > Summa