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Date: Tue, 21 Sep 2021 12:01:12 -0700 From: Kees Cook <keescook@...omium.org> To: Stephen Kitt <steve@....org> Cc: Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>, David Rientjes <rientjes@...gle.com>, Joonsoo Kim <iamjoonsoo.kim@....com>, Andrew Morton <akpm@...ux-foundation.org>, Vlastimil Babka <vbabka@...e.cz>, James Morris <jmorris@...ei.org>, "Serge E . Hallyn" <serge@...lyn.com>, linux-mm@...ck.org, linux-security-module@...r.kernel.org, linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org Subject: Re: [PATCH] mm: Remove HARDENED_USERCOPY_FALLBACK On Tue, Sep 21, 2021 at 08:11:49AM +0200, Stephen Kitt wrote: > This has served its purpose and is no longer used. All usercopy > violations appear to have been handled by now, any remaining > instances (or new bugs) will cause copies to be rejected. > > This isn't a direct revert of commit 2d891fbc3bb6 ("usercopy: Allow > strict enforcement of whitelists"); since usercopy_fallback is > effectively 0, the fallback handling is removed too. > > This also removes the usercopy_fallback module parameter on > slab_common. > > Link: https://github.com/KSPP/linux/issues/153 > Signed-off-by: Stephen Kitt <steve@....org> > Suggested-by: Kees Cook <keescook@...omium.org> Thanks for doing this! Acked-by: Kees Cook <keescook@...omium.org> -- Kees Cook
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