linux-kernel - Re: [PATCH] kasan: add support for kasan.fault=panic_on

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: <CAG_fn=UDZFa3D4JwkEMFoy-d6n-sNB5ARh+3b4ymgtzZCUe8uA@mail.gmail.com>
Date:   Wed, 14 Jun 2023 12:06:38 +0200
From:   Alexander Potapenko <glider@...gle.com>
To:     Marco Elver <elver@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Taras Madan <tarasmadan@...gle.com>,
        Aleksandr Nogikh <nogikh@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Jonathan Corbet <corbet@....net>, kasan-dev@...glegroups.com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH] kasan: add support for kasan.fault=panic_on_write

On Wed, Jun 14, 2023 at 11:52 AM Marco Elver <elver@...gle.com> wrote:
>
> KASAN's boot time kernel parameter 'kasan.fault=' currently supports
> 'report' and 'panic', which results in either only reporting bugs or
> also panicking on reports.
>
> However, some users may wish to have more control over when KASAN
> reports result in a kernel panic: in particular, KASAN reported invalid
> _writes_ are of special interest, because they have greater potential to
> corrupt random kernel memory or be more easily exploited.
>
> To panic on invalid writes only, introduce 'kasan.fault=panic_on_write',
> which allows users to choose to continue running on invalid reads, but
> panic only on invalid writes.
>
> Signed-off-by: Marco Elver <elver@...gle.com>
Reviewed-by: Alexander Potapenko <glider@...gle.com>

Thanks!