linux-kernel - Re: [PATCH v2] fuse: virtio_fs: fix page fault for DAX page address

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAJfpegswS_KRpOxsCYCR9-z3uCGKrJz_=-c1__CHimHC7Y=M2Q@mail.gmail.com>
Date: Thu, 4 Sep 2025 14:10:45 +0200
From: Miklos Szeredi <miklos@...redi.hu>
To: Christian Brauner <brauner@...nel.org>
Cc: linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, 
	Alistair Popple <apopple@...dia.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	Haiyue Wang <haiyuewa@....com>, David Hildenbrand <david@...hat.com>, Vivek Goyal <vgoyal@...hat.com>, 
	Stefan Hajnoczi <stefanha@...hat.com>, Eugenio Pérez <eperezma@...hat.com>, 
	Jason Gunthorpe <jgg@...pe.ca>, 
	"open list:VIRTIO FILE SYSTEM" <virtualization@...ts.linux.dev>, open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] fuse: virtio_fs: fix page fault for DAX page address

On Thu, 4 Sept 2025 at 14:04, Haiyue Wang <haiyuewa@....com> wrote:
>
> The commit ced17ee32a99 ("Revert "virtio: reject shm region if length is zero"")
> exposes the following DAX page fault bug (this fix the failure that getting shm
> region alway returns false because of zero length):
>
> The commit 21aa65bf82a7 ("mm: remove callers of pfn_t functionality") handles
> the DAX physical page address incorrectly: the removed macro 'phys_to_pfn_t()'
> should be replaced with 'PHYS_PFN()'.

Reviewed-by: Miklos Szeredi <mszeredi@...hat.com>

Christian, can you please pick this up?

Thanks,
Miklos