linux-kernel - Re: [PATCH 0/2] Fatal signal handing within uaccess faults

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]

Message-ID: <CALCETrX_T5=9Y77Z7VrM+YcpoFiJkhUGFNTOh2KbuG+7cey-bw@mail.gmail.com>
Date:   Tue, 11 Jul 2017 08:04:50 -0700
From:   Andy Lutomirski <luto@...capital.net>
To:     Mark Rutland <mark.rutland@....com>
Cc:     linux-arm-kerne@...ts.infradead.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        James Morse <james.morse@....com>,
        Laura Abbott <labbott@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        stable <stable@...r.kernel.org>, steve.capper@....com,
        Will Deacon <will.deacon@....com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 0/2] Fatal signal handing within uaccess faults

On Tue, Jul 11, 2017 at 7:16 AM, Mark Rutland <mark.rutland@....com> wrote:
> Hi,
>
> Arch maintainer tl;dr: most arch fault code doesn't handle fatal signals
> correctly, allowing unprivileged users to create an unkillable task which can
> lock up the system. Please check whether your arch is affected.

I haven't tested for real, but brief inspection of the code suggests
that x86 is okay.

--Andy