linux-kernel - Re: Boot failure with kernel BUG at mm/usercopy.c on next-20240325

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Date: Mon, 25 Mar 2024 11:34:33 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Borislav Petkov <bp@...en8.de>
Cc: "V, Narasimhan" <Narasimhan.V@....com>, "linux-next@...r.kernel.org"
 <linux-next@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>,
 "Aithal, Srikanth" <Srikanth.Aithal@....com>, Dawei Li
 <dawei.li@...ngroup.cn>, Andy Shevchenko
 <andriy.shevchenko@...ux.intel.com>, Rasmus Villemoes
 <linux@...musvillemoes.dk>, Yury Norov <yury.norov@...il.com>, lkml
 <linux-kernel@...r.kernel.org>
Subject: Re: Boot failure with kernel BUG at mm/usercopy.c on next-20240325

On Mon, 25 Mar 2024 13:50:17 +0100 Borislav Petkov <bp@...en8.de> wrote:

> Adding more people from that
> 
> 328c801335d5 ("cpumask: create dedicated kmem cache for cpumask var")
> 
> in linux-next.
> 
> On Mon, Mar 25, 2024 at 01:40:20PM +0100, V, Narasimhan wrote:
> > [AMD Official Use Only - General]
> > 
> > Hi,
> > There is a boot failure as below.
> > On bisecting, the bad commit is found to be 328c801335d5f7edf2a3c9c331ddf8978f21e2a7.
> > Boots fine if we revert the above bad commit.
> 
> Narasimhan,
> 
> please send your .config and reproduction instructions. I'm guessing
> you're simply booting it, right?
> 
> Leaving in the rest for the newly CCed people.

Thanks, I'll just drop the patch.  It didn't receive a very favorable
review reception anyway.