linux-kernel - Re: [PATCH] ocfs2: Fix circular locking dependency in ocfs2_del_inode_from

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Message-ID: <aWhxfLwUvHDswsIY@casper.infradead.org>
Date: Thu, 15 Jan 2026 04:47:56 +0000
From: Matthew Wilcox <willy@...radead.org>
To: Prithvi <activprithvi@...il.com>
Cc: joseph.qi@...ux.alibaba.com, mark@...heh.com, jlbec@...lplan.org,
	heming.zhao@...e.com, ocfs2-devel@...ts.linux.dev,
	linux-kernel@...r.kernel.org, linux-kernel-mentees@...ts.linux.dev,
	skhan@...uxfoundation.org, david.hunter.linux@...il.com,
	khalid@...nel.org
Subject: Re: [PATCH] ocfs2: Fix circular locking dependency in
 ocfs2_del_inode_from_orphan()

On Thu, Jan 15, 2026 at 08:48:09AM +0530, Prithvi wrote:
> On Fri, Jan 09, 2026 at 12:07:00AM +0530, Prithvi wrote:
> > IIUC that would be the case when ocfs2_dio_end_io_write() operates on normal
> > files. However, according to the report of the bug, ocfs2_dio_end_io_write()
> > is holding &ocfs2_quota_ip_alloc_sem_key so I think due to random fuzzing by 
> > syzkaller, the function is curently operating on a quota file.

So the right fix is probably to disallow DIO to a quota file, wouldn't
you say?