linux-kernel - Re: [PATCH v3 21/36] arm64/mm: Implement map_shadow

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 1 Aug 2023 19:03:31 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Mike Rapoport <rppt@...nel.org>
Cc:     "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
        "corbet@....net" <corbet@....net>,
        "ardb@...nel.org" <ardb@...nel.org>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "Szabolcs.Nagy@....com" <Szabolcs.Nagy@....com>,
        "shuah@...nel.org" <shuah@...nel.org>,
        "maz@...nel.org" <maz@...nel.org>,
        "james.morse@....com" <james.morse@....com>,
        "debug@...osinc.com" <debug@...osinc.com>,
        "aou@...s.berkeley.edu" <aou@...s.berkeley.edu>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "hjl.tools@...il.com" <hjl.tools@...il.com>,
        "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "oleg@...hat.com" <oleg@...hat.com>,
        "arnd@...db.de" <arnd@...db.de>,
        "ebiederm@...ssion.com" <ebiederm@...ssion.com>,
        "will@...nel.org" <will@...nel.org>,
        "suzuki.poulose@....com" <suzuki.poulose@....com>,
        "kvmarm@...ts.linux.dev" <kvmarm@...ts.linux.dev>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "oliver.upton@...ux.dev" <oliver.upton@...ux.dev>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "palmer@...belt.com" <palmer@...belt.com>
Subject: Re: [PATCH v3 21/36] arm64/mm: Implement map_shadow_stack()

On Tue, Aug 01, 2023 at 08:28:14PM +0300, Mike Rapoport wrote:
> On Tue, Aug 01, 2023 at 05:07:00PM +0000, Edgecombe, Rick P wrote:

> > So the question is not what mode should arm support, but should we have
> > the flags match between x86 and ARM?

> What if the flag will be called, say, SHADOW_STACK_DEFAULT_INIT?
> Then each arch can push whatever it likes to and from the userspace
> perspective the shadow stack will have some basic init state, no matter
> what architecture it is.

x86 might have some fun with that and the existing userspace binaries...

Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)