linux-kernel - Re: [PATCH v4 0/2] Syscall User Redirection

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Message-ID: <202007161324.E75E01B@keescook>
Date:   Thu, 16 Jul 2020 13:25:43 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Christian Brauner <christian.brauner@...ntu.com>
Cc:     Gabriel Krisman Bertazi <krisman@...labora.com>,
        Andy Lutomirski <luto@...nel.org>,
        Matthew Wilcox <willy@...radead.org>, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        gofmanp@...il.com, linux-api@...r.kernel.org, x86@...nel.org,
        linux-kselftest@...r.kernel.org, shuah@...nel.org, jannh@...gle.com
Subject: Re: [PATCH v4 0/2] Syscall User Redirection

On Thu, Jul 16, 2020 at 10:22:34PM +0200, Christian Brauner wrote:
> On Thu, Jul 16, 2020 at 01:04:38PM -0700, Kees Cook wrote:
> > On Thu, Jul 16, 2020 at 03:31:39PM -0400, Gabriel Krisman Bertazi wrote:
> > > This is v4 of Syscall User Redirection.  The implementation itself is
> > > not modified from v3, it only applies the latest round of reviews to the
> > > selftests.
> > > 
> > > __NR_syscalls is not really exported in header files other than
> > > asm-generic for every architecture, so it felt safer to optionally
> > > expose it with a fallback to a high value.
> > > 
> > > Also, I didn't expose tests for PR_GET as that is not currently
> > > implemented.  If possible, I'd have it supported by a future patchset,
> > > since it is not immediately necessary to support this feature.
> > 
> > Thanks! That all looks good to me.
> 
> Don't have any problem with this but did this ever get exposure on
> linux-api? This is the first time I see this pop up.

I thought I'd added it to CC in the past, but that might have been other
recent unrelated threads. Does this need a full repost there too, you
think?

-- 
Kees Cook