linux-kernel - Re: [PATCH 7/7] mm/kasan: define __asan_before_dynamic_init, __asan_after_dynamic

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Message-ID: <CAG_fn=WX4kK+dktmFbUsMqiNd2zumRNTafYbFXd0662Rob4YtA@mail.gmail.com>
Date: Tue, 22 Apr 2025 10:02:55 +0200
From: Alexander Potapenko <glider@...gle.com>
To: Marco Elver <elver@...gle.com>
Cc: quic_jiangenj@...cinc.com, linux-kernel@...r.kernel.org, 
	kasan-dev@...glegroups.com, 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 7/7] mm/kasan: define __asan_before_dynamic_init, __asan_after_dynamic_init

On Tue, Apr 22, 2025 at 8:47 AM Marco Elver <elver@...gle.com> wrote:
>
> On Wed, 16 Apr 2025 at 10:55, Alexander Potapenko <glider@...gle.com> wrote:
> >
> > Calls to __asan_before_dynamic_init() and __asan_after_dynamic_init()
> > are inserted by Clang when building with coverage guards.
> > These functions can be used to detect initialization order fiasco bugs
> > in the userspace, but it is fine for them to be no-ops in the kernel.
> >
> > Signed-off-by: Alexander Potapenko <glider@...gle.com>
>
> This patch should be before the one adding coverage guard
> instrumentation, otherwise KASAN builds will be broken intermittently,
> which would break bisection.

Right, I'm gonna move it in v2. Thanks!