linux-kernel - Re: [PATCH 10/11] VFS: use d_alloc_parallel() in lookup_one_qstr

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: <20250813051957.GE222315@ZenIV>
Date: Wed, 13 Aug 2025 06:19:57 +0100
From: Al Viro <viro@...iv.linux.org.uk>
To: NeilBrown <neil@...wn.name>
Cc: Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
	David Howells <dhowells@...hat.com>,
	Marc Dionne <marc.dionne@...istor.com>,
	Xiubo Li <xiubli@...hat.com>, Ilya Dryomov <idryomov@...il.com>,
	Tyler Hicks <code@...icks.com>, Miklos Szeredi <miklos@...redi.hu>,
	Richard Weinberger <richard@....at>,
	Anton Ivanov <anton.ivanov@...bridgegreys.com>,
	Johannes Berg <johannes@...solutions.net>,
	Trond Myklebust <trondmy@...nel.org>,
	Anna Schumaker <anna@...nel.org>,
	Chuck Lever <chuck.lever@...cle.com>,
	Jeff Layton <jlayton@...nel.org>,
	Amir Goldstein <amir73il@...il.com>,
	Steve French <sfrench@...ba.org>,
	Namjae Jeon <linkinjeon@...nel.org>,
	Carlos Maiolino <cem@...nel.org>, linux-fsdevel@...r.kernel.org,
	linux-afs@...ts.infradead.org, netfs@...ts.linux.dev,
	ceph-devel@...r.kernel.org, ecryptfs@...r.kernel.org,
	linux-um@...ts.infradead.org, linux-nfs@...r.kernel.org,
	linux-unionfs@...r.kernel.org, linux-cifs@...r.kernel.org,
	linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/11] VFS: use d_alloc_parallel() in
 lookup_one_qstr_excl().

On Tue, Aug 12, 2025 at 12:25:13PM +1000, NeilBrown wrote:

> + * If it is d_in_lookup() then these conditions can only be checked by the
> + * file system when carrying out the intent (create or rename).

I do not understand.  In which cases would that happen and what would happen
prior to that patch in the same cases?