linux-kernel - Re: Meet compiled kernel binaray abnormal issue while enabling generic kasan in kernel 6.12 with some default KBUILD

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Message-ID: <CANiq72=v6jkOasLiem7RXe-WUSg9PkNqrZneeMOTi1pzwXuHYg@mail.gmail.com>
Date: Tue, 15 Jul 2025 19:50:36 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: 刘海燕 (Haiyan Liu) <haiyan.liu@...soc.com>
Cc: Miguel Ojeda <ojeda@...nel.org>, 周平 (Ping Zhou/9032) <Ping.Zhou1@...soc.com>, 
	代子为 (Ziwei Dai) <Ziwei.Dai@...soc.com>, 
	杨丽娜 (Lina Yang) <lina.yang@...soc.com>, 
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"rust-for-linux@...r.kernel.org" <rust-for-linux@...r.kernel.org>, 
	王双 (Shuang Wang) <shuang.wang@...soc.com>, 
	Andrey Ryabinin <ryabinin.a.a@...il.com>, Alexander Potapenko <glider@...gle.com>, 
	Andrey Konovalov <andreyknvl@...il.com>, Dmitry Vyukov <dvyukov@...gle.com>, 
	Vincenzo Frascino <vincenzo.frascino@....com>, 
	"kasan-dev@...glegroups.com" <kasan-dev@...glegroups.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Arve Hjønnevåg <arve@...roid.com>, 
	Todd Kjos <tkjos@...roid.com>, Martijn Coenen <maco@...roid.com>, 
	Joel Fernandes <joelagnelf@...dia.com>, Christian Brauner <christian@...uner.io>, 
	Carlos Llamas <cmllamas@...gle.com>, Suren Baghdasaryan <surenb@...gle.com>, 
	Jamie Cunliffe <Jamie.Cunliffe@....com>, Catalin Marinas <catalin.marinas@....com>
Subject: Re: Meet compiled kernel binaray abnormal issue while enabling
 generic kasan in kernel 6.12 with some default KBUILD_RUSTFLAGS on

On Tue, Jul 15, 2025 at 11:41 AM 刘海燕 (Haiyan Liu) <haiyan.liu@...soc.com> wrote:
>
> The commit changes the fragment and diff is:

An Android engineer should know how to handle that, but if you are
reporting upstream, it is best to try to reproduce the issue with the
upstream kernels (e.g. arm64 is not in 6.6.y) and provide the full
kernel config used.

> Only two rust-related global variables in fmr.rs and layout.rs have this issue. Their asan.module_ctor complied binaries are wrong.

I am not sure what you mean by `fmr.rs`. As for `layout.rs`, that is
in the `kernel` crate in 6.12.y -- isn't there a single
`asan.module_ctor` per TU? Which object file are you referring to? I
get the pair for my `rust/kernel.o`.

Cheers,
Miguel