linux-kernel - Re: [PATCH v4] x86/fpu: Fix NULL dereference in avx512

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Message-ID: <11c3284d-1257-4010-b2fb-5cc5b7b87fb4@intel.com>
Date: Mon, 11 Aug 2025 13:29:42 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Sohil Mehta <sohil.mehta@...el.com>,
 Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org
Cc: Borislav Petkov <bp@...en8.de>, "H . Peter Anvin" <hpa@...or.com>,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Sean Christopherson <seanjc@...gle.com>,
 Peter Zijlstra <peterz@...radead.org>,
 Vignesh Balasubramanian <vigbalas@....com>,
 Rick Edgecombe <rick.p.edgecombe@...el.com>, Oleg Nesterov
 <oleg@...hat.com>, "Chang S . Bae" <chang.seok.bae@...el.com>,
 Brian Gerst <brgerst@...il.com>, Eric Biggers <ebiggers@...gle.com>,
 Kees Cook <kees@...nel.org>, Chao Gao <chao.gao@...el.com>,
 Christoph Hellwig <hch@...radead.org>, Fushuai Wang <wangfushuai@...du.com>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] x86/fpu: Fix NULL dereference in avx512_status()

On 8/11/25 13:16, Sohil Mehta wrote:
> On 8/11/2025 12:22 PM, Dave Hansen wrote:
>>
>> The changelog also isn't really converging, so I gave it a go to
>> rewrite it. Is this missing anything?
>>
> 
> Thank you! Your changelog covers the essentials and makes it concise.
> The dual nature of x86_task_fpu() was making it hard to write for me.
> 
> A couple of typos:

Thanks for the second set of eyes!

> Co-developed-by: Random Co-Author <random@...uthor.example.org>
> Signed-off-by: Random Co-Author <random@...uthor.example.org>
> Signed-off-by: From Author <from@...hor.example.org>
> Co-developed-by: Submitting Co-Author <sub@...uthor.example.org>
> Signed-off-by: Submitting Co-Author <sub@...uthor.example.org>

Gah, I hate Co-developed-by.

With those fixes, it's in x86/urgent now.