linux-kernel - Re: [PATCH v15 2/4] syscall user dispatch: untag selector addresses before access

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Message-ID: <20230405160227.GA13943@redhat.com>
Date:   Wed, 5 Apr 2023 18:02:28 +0200
From:   Oleg Nesterov <oleg@...hat.com>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Gregory Price <gourry.memverge@...il.com>,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-arch@...r.kernel.org, avagin@...il.com, peterz@...radead.org,
        luto@...nel.org, krisman@...labora.com, tglx@...utronix.de,
        corbet@....net, shuah@...nel.org, arnd@...db.de,
        Gregory Price <gregory.price@...verge.com>
Subject: Re: [PATCH v15 2/4] syscall user dispatch: untag selector addresses
 before access_ok

On 04/05, Catalin Marinas wrote:
>
> > Yes, from the security perspective, but there are ABI implications.

Thanks a lot for your explanations.

To be honest, I am still a bit confused... Will try to grep the relevant code.
But as for this patch, now I believe it is correct.

So, FWIW,

Acked-by: Oleg Nesterov <oleg@...hat.com>