Re: [bug report] A filesystem abnormal mount issue

From: Christoph Hellwig
Date: Thu Jul 17 2025 - 07:04:29 EST


On Thu, Jul 17, 2025 at 11:39:01AM +0200, Christian Brauner wrote:
> As long as you use the new mount api you should pass
> FSCONFIG_CMD_CREATE_EXCL which will refuse to mount if a superblock for
> the device already exists. IOW, it ensure that you cannot silently reuse
> a superblock.
>
> Other than that I think a blkdev_get_no_open(dev, false) after
> lookup_bdev() should sort the issue out. Christoph?

Or just check for GD_DEAD before the mount proceeds?