linux-kernel - Re: [PATCH -next] x86: Prevent KASAN false positive warnings in __show

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Message-ID: <b9396511-810f-4ff6-aead-ceb36dd734b7@huaweicloud.com>
Date: Fri, 29 Aug 2025 10:50:03 +0800
From: Tengda Wu <wutengda@...weicloud.com>
To: Dave Hansen <dave.hansen@...el.com>,
 Andrey Ryabinin <ryabinin.a.a@...il.com>, x86@...nel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
 Alexander Potapenko <glider@...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>,
 linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>,
 Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH -next] x86: Prevent KASAN false positive warnings in
 __show_regs()



On 2025/8/28 22:13, Dave Hansen wrote:
> On 8/28/25 05:06, Tengda Wu wrote:
>> It seems there's no existing on_current_stack function available.
>> Implementing an on_current_stack function would be somewhat
>> challenging for me. 
> 
> Is there some reason that object_is_on_stack() won't work?

Ah, that's what it's called! Yes, object_is_on_stack() should work
perfectly for that. Thanks for the clarification.

-- Tengda