linux-kernel - Re: [GIT PULL] hardening fixes for v5.18-rc1

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Message-ID: <CAHk-=wjQ0+9jBy6bm850h1jms1tja8xnon4X5v0LSO4biLhFGg@mail.gmail.com>
Date:   Thu, 31 Mar 2022 11:49:42 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Hellwig <hch@....de>,
        David Hildenbrand <david@...hat.com>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Logan Gunthorpe <logang@...tatee.com>,
        Martin Oliveira <martin.oliveira@...eticom.com>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Minchan Kim <minchan@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Zi Yan <ziy@...dia.com>
Subject: Re: [GIT PULL] hardening fixes for v5.18-rc1

On Thu, Mar 31, 2022 at 11:35 AM Kees Cook <keescook@...omium.org> wrote:
>
> Please pull these hardening fixes for v5.18-rc1. This addresses an
> -Warray-bounds warning found under a few ARM defconfigs, and disables
> long-broken CONFIG_HARDENED_USERCOPY_PAGESPAN.

Can't we just remove that HARDENED_USERCOPY_PAGESPAN thing entirely?

Yes, yes, I know Matthew did that as part of other patches that is too
late to go in any more in this merge window, but just the removal
patch is a no-brainer.

IOW, why not just do the attached?

                    Linus

View attachment "patch.diff" of type "text/x-patch" (4460 bytes)