Re: [PATCH v2] loop: block changing lo_offset/lo_sizelimit on mounted device

[Christoph Hellwig]

On Tue, Mar 31, 2026 at 08:24:08AM -0400, Theodore Tso wrote:
> Do we expect people to seriously be running with
> !CONFIG_BLK_DEV_WRITE_MOUNTED? 

Yes, it's the only sane option.

> I view this as a syzkaller noise
> suppression only.  As I mentioned earlier this option will very likely
> break grub.

Yes, the horrible things grub does won't work with this.  But I thought
with EFI-based systems people had mostly stopped using the access
to the root file system misfeature in grub.  And a lot of specialized
distros seem to stop using grub entirely.