linux-kernel - Re: [PATCH 3/7] kcov: x86: introduce CONFIG_KCOV_ENABLE

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: <CANpmjNM8W67r2W8FNbcDzjaV1HVE5R77ZFgbUABYusgWBzqpTA@mail.gmail.com>
Date: Thu, 24 Apr 2025 16:03:26 +0200
From: Marco Elver <elver@...gle.com>
To: Alexander Potapenko <glider@...gle.com>
Cc: quic_jiangenj@...cinc.com, linux-kernel@...r.kernel.org, 
	kasan-dev@...glegroups.com, x86@...nel.org, 
	Aleksandr Nogikh <nogikh@...gle.com>, Andrey Konovalov <andreyknvl@...il.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, Dmitry Vyukov <dvyukov@...gle.com>, 
	Ingo Molnar <mingo@...hat.com>, Josh Poimboeuf <jpoimboe@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 3/7] kcov: x86: introduce CONFIG_KCOV_ENABLE_GUARDS

On Thu, 24 Apr 2025 at 15:59, Alexander Potapenko <glider@...gle.com> wrote:
>
> > > --- a/arch/x86/kernel/vmlinux.lds.S
> > > +++ b/arch/x86/kernel/vmlinux.lds.S
> > > @@ -390,6 +390,7 @@ SECTIONS
> > >                 . = ALIGN(PAGE_SIZE);
> > >                 __bss_stop = .;
> > >         }
> > > +       SANCOV_GUARDS_BSS
> >
> > Right now this will be broken on other architectures, right?
>
> Right. I'm going to make it depend on X86_64 for now.

This needs to be done with a 'select HAVE_KCOV_UNIQUE' or such from
arch/x86/Kconfig.