linux-kernel - Re: [PATCH] x86/mm: fix overflow in __cpa

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Message-ID: <cbd56835c1b8dc2609019193d896d3f0ec7346ad.camel@surriel.com>
Date: Tue, 07 Oct 2025 13:23:08 -0400
From: Rik van Riel <riel@...riel.com>
To: Dave Hansen <dave.hansen@...el.com>, syzbot
	 <syzbot+afec6555eef563c66c97@...kaller.appspotmail.com>
Cc: bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com,
 kas@...nel.org, 	kevin.brodsky@....com, linux-kernel@...r.kernel.org,
 luto@...nel.org, 	mingo@...hat.com, peterz@...radead.org, rppt@...nel.org, 
	syzkaller-bugs@...glegroups.com, tglx@...utronix.de, wei.liu@...nel.org, 
	x86@...nel.org, yu-cheng.yu@...el.com
Subject: Re: [PATCH] x86/mm: fix overflow in __cpa_addr

On Mon, 2025-10-06 at 15:22 -0700, Dave Hansen wrote:
> On 10/5/25 20:48, Rik van Riel wrote:
> > Signed-off-by: Rik van Riel <riel@...riel.com>
> > Cc: stable@...nel.org
> > Reported-by: syzbot+afec6555eef563c66c97@...kaller.appspotmail.com
> > Fixes: 86e6815b316e ("x86/mm: Change cpa_flush() to call
> > flush_kernel_range() directly")
> 
> Hi Folks,
> 
> Thanks for the quick fix here!
> 
> But this doesn't need to go to stable, right? I think it just went to
> Linus during the merge window last week so it never made it to a
> release, so won't need a stable backport.
> 
Oh good point.

I had totally lost track of when the problem
was merged upstream in the first place.

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