linux-kernel - Query : Regarding csdb barrier with llvm compiler

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>] [day] [month] [year] [list]

Date:   Tue, 31 Mar 2020 14:55:08 +0530
From:   Gaurav Kohli <gkohli@...eaurora.org>
To:     Robin Murphy <robin.murphy@....com>,
        Will Deacon <will.deacon@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Cc:     linux-arm-msm@...r.kernel.org, jannh@...gle.com
Subject:  Query : Regarding csdb barrier with llvm compiler

<Resending again, saw some failure messages on previous mail>

Hi ,

Right now we are using array_index_nospec api in linux kernel and using 
in the place where we think speculative out of bound access may happen.

This thing is applicable with GCC tool chain, as for GCC we have to use 
builtin api to place csdb in the required places.

Recently llvm toolchain comes with hardening option which will place 
csdb in the required places, Do we have any plan to use this thing in 
linux kernel.

Regards
Gaurav

-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center,
Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.