linux-kernel - RE: [PATCH v15 01/26] Documentation/x86: Add CET description

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:   Mon, 30 Nov 2020 10:26:41 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     yu-cheng.yu@...el.com
Cc:     Dave.Martin@....com, arnd@...db.de, bp@...en8.de,
        bsingharora@...il.com, corbet@....net, dave.hansen@...ux.intel.com,
        esyr@...hat.com, fweimer@...hat.com, gorcunov@...il.com,
        hjl.tools@...il.com, hpa@...or.com, jannh@...gle.com,
        keescook@...omium.org, linux-api@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org, luto@...nel.org,
        mike.kravetz@...cle.com, mingo@...hat.com, nadav.amit@...il.com,
        oleg@...hat.com, pavel@....cz, pengfei.xu@...el.com,
        peterz@...radead.org, ravi.v.shankar@...el.com,
        rdunlap@...radead.org, tglx@...utronix.de,
        vedvyas.shanbhogue@...el.com, weijiang.yang@...el.com,
        x86@...nel.org, maskray@...gle.com, llozano@...gle.com,
        clang-built-linux@...glegroups.com, erich.keane@...el.com
Subject: RE: [PATCH v15 01/26] Documentation/x86: Add CET description

(In response to https://lore.kernel.org/lkml/20201110162211.9207-2-yu-cheng.yu@intel.com/)

> These need to be enabled to build a CET-enabled kernel, and Binutils v2.31
> and GCC v8.1 or later are required to build a CET kernel.

What about LLVM? Surely CrOS might be of interest to ship this on (we ship the
equivalent for aarch64 on Android).

> An application's CET capability is marked in its ELF header and can be
> verified from the following command output, in the NT_GNU_PROPERTY_TYPE_0
> field:
>
>     readelf -n <application> | grep SHSTK
>         properties: x86 feature: IBT, SHSTK

Same for llvm-readelf.