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Date: Tue, 04 Oct 2016 11:18:37 +1100 From: Michael Ellerman <mpe@...erman.id.au> To: Andrew Morton <akpm@...ux-foundation.org>, Kees Cook <keescook@...omium.org>, Denys Vlasenko <dvlasenk@...hat.com> Cc: "linuxppc-dev\@lists.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>, Jason Gunthorpe <jgunthorpe@...idianresearch.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>, Oleg Nesterov <oleg@...hat.com>, Florian Weimer <fweimer@...hat.com>, Linux-MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v6] powerpc: Do not make the entire heap executable Kees Cook <keescook@...omium.org> writes: > On Mon, Oct 3, 2016 at 9:13 AM, Denys Vlasenko <dvlasenk@...hat.com> wrote: >> On 32-bit powerpc the ELF PLT sections of binaries (built with --bss-plt, >> or with a toolchain which defaults to it) look like this: ... >> >> Signed-off-by: Jason Gunthorpe <jgunthorpe@...idianresearch.com> >> Signed-off-by: Denys Vlasenko <dvlasenk@...hat.com> >> Acked-by: Kees Cook <keescook@...omium.org> >> Acked-by: Michael Ellerman <mpe@...erman.id.au> >> CC: Benjamin Herrenschmidt <benh@...nel.crashing.org> >> CC: Paul Mackerras <paulus@...ba.org> >> CC: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com> >> CC: Kees Cook <keescook@...omium.org> >> CC: Oleg Nesterov <oleg@...hat.com> >> CC: Michael Ellerman <mpe@...erman.id.au> >> CC: Florian Weimer <fweimer@...hat.com> >> CC: linux-mm@...ck.org >> CC: linuxppc-dev@...ts.ozlabs.org >> CC: linux-kernel@...r.kernel.org >> --- >> Changes since v5: >> * made do_brk_flags() error out if any bits other than VM_EXEC are set. >> (Kees Cook: "With this, I'd be happy to Ack.") >> See https://patchwork.ozlabs.org/patch/661595/ > > Excellent, thanks for the v6! Should this go via the ppc tree or the -mm tree? -mm would be best, given the diffstat I think it's less likely to conflict if it goes via -mm. cheers
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