linux-kernel - Re: [PATCH] mm: convert partially_mapped set/clear operations to be atomic

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] [day] [month] [year] [list]

Message-ID: <Z1smclZ7axm4128K@google.com>
Date: Thu, 12 Dec 2024 18:07:46 +0000
From: Roman Gushchin <roman.gushchin@...ux.dev>
To: Usama Arif <usamaarif642@...il.com>
Cc: david@...hat.com, akpm@...ux-foundation.org, linux-mm@...ck.org,
	hannes@...xchg.org, riel@...riel.com, shakeel.butt@...ux.dev,
	yuzhao@...gle.com, npache@...hat.com, baohua@...nel.org,
	ryan.roberts@....com, rppt@...nel.org, willy@...radead.org,
	cerasuolodomenico@...il.com, ryncsn@...il.com, corbet@....net,
	linux-kernel@...r.kernel.org, kernel-team@...a.com
Subject: Re: [PATCH] mm: convert partially_mapped set/clear operations to be
 atomic

On Thu, Dec 12, 2024 at 01:54:47PM +0000, Usama Arif wrote:
> Other page flags in the 2nd page, like PG_hwpoison and
> PG_anon_exclusive can get modified concurrently. Hence,
> partially_mapped flags need to be changed atomically.
> 
> Fixes: 8422acdc97ed ("mm: introduce a pageflag for partially mapped folios")
> Reported-by: David Hildenbrand <david@...hat.com>
> Signed-off-by: Usama Arif <usamaarif642@...il.com>

Acked-by: Roman Gushchin <roman.gushchin@...ux.dev>

Thanks!