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Date: Fri, 24 Mar 2023 13:34:14 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Cc: <linux-fsdevel@vger.kernel.org>, <nvdimm@lists.linux.dev>,
 <dan.j.williams@intel.com>, <willy@infradead.org>, <jack@suse.cz>
Subject: Re: [PATCH] fsdax: dedupe should compare the min of two iters'
 length
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On Fri, 24 Mar 2023 12:19:46 +0800 Shiyang Ruan <ruansy.fnst@fujitsu.com> wrote:

> > Again, how does the bug impact real-world kernel users?
> 
> The dedupe command will fail with -EIO if the range is larger than one 
> page size and not aligned to the page size.  Also report warning in dmesg:
> 
> [ 4338.498374] ------------[ cut here ]------------
> [ 4338.498689] WARNING: CPU: 3 PID: 1415645 at fs/iomap/iter.c:16 

OK, thanks.  I added the above to the changelog and added cc:stable.