linux-kernel - Re: [PATCH 12/18] kernel: add ksys

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: <20180515095645.zrkwsvhifecghkk4@lakrids.cambridge.arm.com>
Date:   Tue, 15 May 2018 10:56:46 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        catalin.marinas@....com, dave.martin@....com, james.morse@....com,
        linux@...inikbrodowski.net, linux-fsdevel@...r.kernel.org,
        marc.zyngier@....com, viro@...iv.linux.org.uk, will.deacon@....com
Subject: Re: [PATCH 12/18] kernel: add ksys_personality()

On Mon, May 14, 2018 at 05:07:56AM -0700, Christoph Hellwig wrote:
> On Mon, May 14, 2018 at 10:46:34AM +0100, Mark Rutland wrote:
> > Using this helper allows us to avoid the in-kernel call to the
> > sys_personality() syscall. The ksys_ prefix denotes that this function
> > is meant as a drop-in replacement for the syscall. In particular, it
> > uses the same calling convention as sys_personality().
> > 
> > This is necessary to enable conversion of arm64's syscall handling to
> > use pt_regs wrappers.
> 
> Plese just opencode the trivial sys_personality logic instead.

Sure, I'll make that a static inline in <linux/syscalls.h> as with
ksys_close() and friends.

Thanks,
Mark.