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Date: Fri, 19 Nov 2021 08:42:08 -0800 From: Kees Cook <keescook@...omium.org> To: Christophe Leroy <christophe.leroy@...roup.eu> Cc: Michael Ellerman <mpe@...erman.id.au>, kernel test robot <lkp@...el.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, Sudeep Holla <sudeep.holla@....com>, Peter Zijlstra <peterz@...radead.org>, Nicholas Piggin <npiggin@...il.com>, "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>, "linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org> Subject: Re: [PATCH] powerpc/signal32: Use struct_group() to zero spe regs On Fri, Nov 19, 2021 at 05:35:00PM +0100, Christophe Leroy wrote: > Neither do I. I was just scared by what I saw while reviewing your patch. A > cleanup is probably required but it can be another patch. Heh, understood! For my end, my objective with the fortify work is to either split cross-member memcpy() calls (which is usually undesirable) or add a struct group so it can be seen as a "single member" memcpy again (and usually results in 0 differences in binary output). :) -- Kees Cook
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