linux-kernel - Re: add file system helpers that take kernel pointers for the init code v4

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: <20200729195117.GE951209@ZenIV.linux.org.uk>
Date:   Wed, 29 Jul 2020 20:51:17 +0100
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Christoph Hellwig <hch@....de>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-api@...r.kernel.org
Subject: Re: add file system helpers that take kernel pointers for the init
 code v4

On Tue, Jul 28, 2020 at 06:33:53PM +0200, Christoph Hellwig wrote:
> Hi Al and Linus,
> 
> currently a lot of the file system calls in the early in code (and the
> devtmpfs kthread) rely on the implicit set_fs(KERNEL_DS) during boot.
> This is one of the few last remaining places we need to deal with to kill
> off set_fs entirely, so this series adds new helpers that take kernel
> pointers.  These helpers are in init/ and marked __init and thus will
> be discarded after bootup.  A few also need to be duplicated in devtmpfs,
> though unfortunately.
>
> The series sits on top of my previous
> 
>   "decruft the early init / initrd / initramfs code v2"

Could you fold the fixes in the parent branch to avoid the bisect hazards?
As it is, you have e.g. "initd: pass a non-f_pos offset to kernel_read/kernel_write"
that ought to go into "initrd: switch initrd loading to struct file based APIs"...