From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Jan Kara <jack@suse.cz>
Cc: linux-ext4@vger.kernel.org, Andreas Dilger <adilger@dilger.ca>
Subject: Re: [PATCH v2] ext4: Detect already used quota file early
Date: Thu, 15 Oct 2020 10:56:16 -0400 [thread overview]
Message-ID: <20201015145616.GE181507@mit.edu> (raw)
In-Reply-To: <20201015110330.28716-1-jack@suse.cz>
On Thu, Oct 15, 2020 at 01:03:30PM +0200, Jan Kara wrote:
> When we try to use file already used as a quota file again (for the same
> or different quota type), strange things can happen. At the very least
> lockdep annotations may be wrong but also inode flags may be wrongly set
> / reset. When the file is used for two quota types at once we can even
> corrupt the file and likely crash the kernel. Catch all these cases by
> checking whether passed file is already used as quota file and bail
> early in that case.
>
> This fixes occasional generic/219 failure due to lockdep complaint.
>
> Reviewed-by: Andreas Dilger <adilger@dilger.ca>
> Reported-by: Ritesh Harjani <riteshh@linux.ibm.com>
> Signed-off-by: Jan Kara <jack@suse.cz>
Replied to the wrong patch previously. Thanks, applied.
- Ted
prev parent reply other threads:[~2020-10-15 14:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-15 11:03 [PATCH v2] ext4: Detect already used quota file early Jan Kara
2020-10-15 14:56 ` Theodore Y. Ts'o [this message]
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