linux-kernel - Re: [PATCH 3/3] m68k: leave stack mangling to asm wrapper of sigreturn()

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Message-ID: <YUNtUXUVK5sRL5vw@zeniv-ca.linux.org.uk>
Date:   Thu, 16 Sep 2021 16:14:09 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Michael Schmitz <schmitzmic@...il.com>
Cc:     linux-m68k@...ts.linux-m68k.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] m68k: leave stack mangling to asm wrapper of
 sigreturn()

On Thu, Sep 16, 2021 at 05:02:22PM +1200, Michael Schmitz wrote:

> The only question that remains is whether the third patch can also go to
> -stable. Most of my testing was with all three patches applied, I can drop
> the third one and retest if you're worries the third one is not appropriate
> for -stable.

	Up to m68k folks, really.  The current mainline mangle_kernel_stack()
is, er, not nice and the entire area is delicate enough as it is (witness the
bugs dealt with in the rest of the series), but strictly speaking the third
patch is not fixing any functional bugs.