Re: [PATCH 1/2] Fix a crash when block device is read and block size is changed at the same time

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Subject: Re: [PATCH 1/2] Fix a crash when block device is read and block size is changed at the same time
From: Jeff Moyer <jmoyer@xxxxxxxxxx>
Date: Fri, 16 Nov 2012 17:02:37 -0500
Cc: Jens Axboe <axboe@xxxxxxxxx>, Andrea Arcangeli <aarcange@xxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Eric Dumazet <eric.dumazet@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxx, Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>, kosaki.motohiro@xxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, lwoodman@xxxxxxxxxx, "Alasdair G. Kergon" <agk@xxxxxxxxxx>
In-reply-to: <Pine.LNX.4.64.1209251847340.21075@file.rdu.redhat.com> (Mikulas Patocka's message of "Tue, 25 Sep 2012 18:49:19 -0400 (EDT)")
References: <Pine.LNX.4.64.1206272226050.22857@file.rdu.redhat.com> <Pine.LNX.4.64.1207181512530.10923@file.rdu.redhat.com> <x49k3xzq3jc.fsf@segfault.boston.devel.redhat.com> <Pine.LNX.4.64.1207281236230.30415@file.rdu.redhat.com> <Pine.LNX.4.64.1207281240270.30415@file.rdu.redhat.com> <1343508252.2626.13184.camel@edumazet-glaptop> <Pine.LNX.4.64.1207290107460.29910@file.rdu.redhat.com> <1343556630.2626.13257.camel@edumazet-glaptop> <1343586962.2626.13266.camel@edumazet-glaptop> <Pine.LNX.4.64.1208011601280.21832@file.rdu.redhat.com> <Pine.LNX.4.64.1208311433480.2212@file.rdu.redhat.com> <Pine.LNX.4.64.1208311518340.16960@file.rdu.redhat.com> <x49liguyg6r.fsf@segfault.boston.devel.redhat.com> <x49wqzswdn3.fsf@segfault.boston.devel.redhat.com> <Pine.LNX.4.64.1209181257410.11735@file.rdu.redhat.com> <x49ehlzrt01.fsf@segfault.boston.devel.redhat.com> <x49sja6ouv4.fsf@segfault.boston.devel.redhat.com> <5061F0E6.5000403@kernel.dk> <5061F3D2.6050502@kernel.dk> <Pine.LNX.4.64.1209251847340.21075@file.rdu.redhat.com>
Reply-to: device-mapper development <dm-devel@xxxxxxxxxx>
User-agent: Gnus/5.110011 (No Gnus v0.11) Emacs/23.1 (gnu/linux)

Mikulas Patocka <mpatocka@xxxxxxxxxx> writes:

> blockdev: fix a crash when block size is changed and I/O is issued simultaneously
>
> The kernel may crash when block size is changed and I/O is issued
> simultaneously.

Mikulas, do you plan to submit a variant of this for stable as well?

Cheers,
Jeff

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References:
- Crash when IO is being submitted and block size is changed
  - From: Mikulas Patocka
- Re: Crash when IO is being submitted and block size is changed
  - From: Mikulas Patocka
- Re: Crash when IO is being submitted and block size is changed
  - From: Jeff Moyer
- [PATCH 1/3] Fix Crash when IO is being submitted and block size is changed
  - From: Mikulas Patocka
- [PATCH 2/3] Introduce percpu rw semaphores
  - From: Mikulas Patocka
- Re: [PATCH 2/3] Introduce percpu rw semaphores
  - From: Eric Dumazet
- Re: [PATCH 2/3] Introduce percpu rw semaphores
  - From: Mikulas Patocka
- Re: [PATCH 2/3] Introduce percpu rw semaphores
  - From: Eric Dumazet
- Re: [PATCH 2/3] Introduce percpu rw semaphores
  - From: Eric Dumazet
- [PATCH 4/3] Introduce percpu rw semaphores
  - From: Mikulas Patocka
- [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Mikulas Patocka
- Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Mikulas Patocka
- Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Jeff Moyer
- Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Jeff Moyer
- Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Mikulas Patocka
- Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Jeff Moyer
- Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Jeff Moyer
- Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Jens Axboe
- Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time
  - From: Jens Axboe
- [PATCH 1/2] Fix a crash when block device is read and block size is changed at the same time
  - From: Mikulas Patocka

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