linux-kernel - Re: [syzbot] [iomap?] [xfs?] WARNING in iomap_write

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Message-ID: <Zs2m1cXz2o8o1IC-@infradead.org>
Date: Tue, 27 Aug 2024 03:13:41 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Julian Sun <sunjunchao2870@...il.com>
Cc: syzbot <syzbot+296b1c84b9cbf306e5a0@...kaller.appspotmail.com>,
	brauner@...nel.org, chandan.babu@...cle.com, djwong@...nel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-xfs@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [iomap?] [xfs?] WARNING in iomap_write_begin

On Tue, Aug 27, 2024 at 04:54:41PM +0800, Julian Sun wrote:
> On Tue, 2024-08-13 at 01:14 -0700, syzbot wrote:
> Hi,
> 
> Is this still a valid problem, or is it a known issue? If it is still
> valid, I'd like to dig it into, but do you have any ideas or
> suggestions before I proceed? Thanks.

I tried to reproduce it locally but haven't hit it.  Once reproduced
the next debug check would be which of the need zeroing conditions
triggers.