linux-kernel - Re: [PATCH] ext4: fix WARNING in ext4_expand_extra_isize

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Message-ID: <Y4j142NC7u0O8VHt@sol.localdomain>
Date:   Thu, 1 Dec 2022 10:43:47 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     Jan Kara <jack@...e.cz>
Cc:     "yebin (H)" <yebin10@...wei.com>, Ye Bin <yebin@...weicloud.com>,
        tytso@....edu, adilger.kernel@...ger.ca,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzbot+4d99a966fd74bdeeec36@...kaller.appspotmail.com
Subject: Re: [PATCH] ext4: fix WARNING in ext4_expand_extra_isize_ea

On Thu, Dec 01, 2022 at 03:21:43PM +0100, Jan Kara wrote:
> You're right that VFS actually limits xattr size to 64k. So the chances
> that someone actually has filesystem with larger xattrs are slim. But I
> know that Lustre guys run with their modified kernels and they were the
> ones implementing ea_inode feature so maybe they'd bumped the VFS limit as
> well in their kernels.

Upstream has 64K, so that's all that matters in the context of upstream.  If
someone changed it downstream, that's their problem.

- Eric