linux-kernel - Re: [PATCH V5] loop: Add sanity check for read/write

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Message-ID:
 <BL1PR11MB5979C08BC3D25571F3E7DEA8869FA@BL1PR11MB5979.namprd11.prod.outlook.com>
Date: Tue, 20 May 2025 06:49:47 +0000
From: "Xu, Lizhi" <Lizhi.Xu@...driver.com>
To: Christian Hesse <mail@...rm.de>
CC: "axboe@...nel.dk" <axboe@...nel.dk>,
        "christian@...sel.eu"
	<christian@...sel.eu>,
        "hch@...radead.org" <hch@...radead.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "ming.lei@...hat.com" <ming.lei@...hat.com>,
        "syzbot+6af973a3b8dfd2faefdc@...kaller.appspotmail.com"
	<syzbot+6af973a3b8dfd2faefdc@...kaller.appspotmail.com>,
        "syzkaller-bugs@...glegroups.com" <syzkaller-bugs@...glegroups.com>
Subject: Re: [PATCH V5] loop: Add sanity check for read/write_iter

It was designed that way. But for now, if such files from a filesystem
that does not support read_iter are mounted to the loop device without
performing read operations, it may be safe.

It would be best if Christoph Hellwig could give some comments.

BR,
Lizhi