linux-kernel - Re: [PATCH] arm64: make STACKPROTECTOR_PER

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: <20210309151046.GZ6564@kitsune.suse.cz>
Date:   Tue, 9 Mar 2021 16:10:46 +0100
From:   Michal Suchánek <msuchanek@...e.de>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: make STACKPROTECTOR_PER_TASK configurable.

On Tue, Mar 09, 2021 at 11:53:21PM +0900, Masahiro Yamada wrote:
> On Tue, Mar 9, 2021 at 10:35 PM Michal Suchánek <msuchanek@...e.de> wrote:
> >
> > On Tue, Mar 09, 2021 at 10:22:36PM +0900, Masahiro Yamada wrote:
> > > On Tue, Mar 9, 2021 at 9:35 PM Michal Suchanek <msuchanek@...e.de> wrote:
> > > >
> > > > When using dummy-tools STACKPROTECTOR_PER_TASK is unconditionally
> > > > selected. This defeats the purpose of the all-enabled tool.
> > > >
> > > > Description copied from arm
> > > >
> > > > Cc: Masahiro Yamada <masahiroy@...nel.org>
> > > > Signed-off-by: Michal Suchanek <msuchanek@...e.de>
> > >
> > >
> > > Could you explain what problem
> > > this patch is trying to solve?
> >
> > The option cannot be disabled when compiler has the required capability.
> 
> 
> Yes.
> Currently, this symbol claims "def_bool y",
> so there is no way to disable it.
> 
> But, it comes from the nature of Kconfig in general.
> 
> dummy-tools is completely unrelated here.

dummy-tools makes all configuration options available in order to be
able to author configuration files on system different from the one
where the kernel is built. This prevents authoring a configuration file
with this option disabled.

Thanks

Michal