From: Jose Fernandez <jose.fernandez@linux.dev>
To: "David Hildenbrand (Arm)" <david@kernel.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
Jan Kara <jack@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Krystian Kaniewski <krystianmkaniewski@gmail.com>
Subject: Re: [PATCH] mm/filemap: stop fault-around when the walk steps back
Date: Sat, 31 Oct 2026 04:33:06 +0000 [thread overview]
Message-ID: <20261031-jf-mm-filemap-reply-r2-7d4c1e9ab350@linux.dev> (raw)
In-Reply-To: <0a1ad7d2-ff0e-4248-8f03-2a64a9134aae@kernel.org>
On Thu, Oct 29, 2026 David Hildenbrand (Arm) wrote:
> Only read or also write? I assume only read.
Both. KASAN only reports the read, but once vmf->pte has stepped
outside the page table the loop will also call set_pte_range() on
that slot if it reads as pte_none(), so a stray write is possible
too. I'll call that out in the v2 changelog.
> Sounds like we want a Fixes: tag and Cc: stable? :)
Yes, v2 will carry both.
- Jose
prev parent reply other threads:[~2026-10-31 4:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-29 15:50 [PATCH] mm/filemap: stop fault-around when the walk steps back Jose Fernandez (Anthropic)
2026-10-29 19:26 ` David Hildenbrand (Arm)
2026-10-31 4:33 ` Jose Fernandez [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20261031-jf-mm-filemap-reply-r2-7d4c1e9ab350@linux.dev \
--to=jose.fernandez@linux.dev \
--cc=akpm@linux-foundation.org \
--cc=david@kernel.org \
--cc=jack@suse.cz \
--cc=krystianmkaniewski@gmail.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.