linux-kernel - Re: [PATCH 0/2] Some boundary error bugfix related to XFS fsmap.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240902190828.GA6224@frogsfrogsfrogs>
Date: Mon, 2 Sep 2024 12:08:28 -0700
From: "Darrick J. Wong" <djwong@...nel.org>
To: Zizhi Wo <wozizhi@...wei.com>
Cc: chandan.babu@...cle.com, dchinner@...hat.com, osandov@...com,
	john.g.garry@...cle.com, linux-xfs@...r.kernel.org,
	linux-kernel@...r.kernel.org, yangerkun@...wei.com
Subject: Re: [PATCH 0/2] Some boundary error bugfix related to XFS fsmap.

On Thu, Aug 29, 2024 at 07:24:55PM +0800, Zizhi Wo wrote:
> friendly ping

Sorry, I'm not going to get to this until late September.

--D

> 在 2024/8/26 11:10, Zizhi Wo 写道:
> > Prior to this, I had already sent out a patchset related to xfs fsmap
> > bugfix, which mainly introduced "info->end_daddr" to fix omitted extents[1]
> > and Darrick had already sent out a patchbomb for merging into stable[2],
> > which included my previous patches.
> > 
> > However, I recently discovered two new fsmap problems...What follows is a
> > brief description of them:
> > 
> > Patch 1: In this scenario, fsmap lost one block count. The root cause is
> > that during the calculation of highkey, the calculation of start_block is
> > missing an increment by one, which leads to the last query missing one
> > This problem is resolved by adding a sentinel node.
> > 
> > Patch 2: In this scenario, the fsmap query for realtime deivce may display
> > extra intervals. This is due to an extra increase in "end_rtb". The issue
> > is resolved by adjusting the relevant calculations. And this patch depends
> > on the previous patch that introduced "info->end_daddr".
> > 
> > [1] https://lore.kernel.org/all/20240819005320.304211-1-wozizhi@huawei.com/
> > [2] https://lore.kernel.org/all/172437083728.56860.10056307551249098606.stgit@frogsfrogsfrogs/
> > 
> > Zizhi Wo (2):
> >    xfs: Fix missing block calculations in xfs datadev fsmap
> >    xfs: Fix incorrect parameter calculation in rt fsmap
> > 
> >   fs/xfs/libxfs/xfs_rtbitmap.c |  4 +---
> >   fs/xfs/xfs_fsmap.c           | 39 +++++++++++++++++++++++++++++++-----
> >   2 files changed, 35 insertions(+), 8 deletions(-)
> > 
>