Re: [PATCH] block: add lock for safe nrpages access in invalidate_bdev()

[Matthew Wilcox]

On Mon, Mar 10, 2025 at 09:54:00AM -0700, Yuan Tan wrote:
> Syzbot reported a data-race in __filemap_add_folio / invalidate_bdev[1]
> due to concurrent access to mapping->nrpages.
> Adds a lock around the access to nrpages.

Did you even read my analysis?  This is a grossly inappropriate fix.
NAK.