linux-kernel - Re: CVE-2024-26650: platform/x86: p2sb: Allow p2sb

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Date: Thu, 23 May 2024 15:51:38 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: zhengzucheng <zhengzucheng@...wei.com>
Cc: Michal Hocko <mhocko@...e.com>, linux-cve-announce@...r.kernel.org,
	Lee Jones <lee@...nel.org>, Jun.Ma2@....com, cve@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: CVE-2024-26650: platform/x86: p2sb: Allow p2sb_bar() calls
 during PCI device probe

On Thu, May 23, 2024 at 04:50:18PM +0800, zhengzucheng wrote:
> 
> 在 2024/5/22 3:31, Michal Hocko 写道:
> > This patch has been reverted in upstream by 03c6284df179 ("Revert
> > "drm/amd/amdgpu: Fix potential ioremap() memory leaks in
> > amdgpu_device_init()"") and based on the changelog the CVE should be
> > rejected.
> 
> hi Michal Hocko
> 
> This reverted patch was previously used to resolve CVE-2024-35928 ?
> 
> so CVE-2024-35928 should be rejected?
> 
> 
> commit 03c6284df179de3a4a6e0684764b1c71d2a405e2
> Author: Ma Jun <Jun.Ma2@....com>
> Date:   Tue Mar 19 15:24:03 2024 +0800
> 
>     Revert "drm/amd/amdgpu: Fix potential ioremap() memory leaks in
> amdgpu_device_init()"
> 
>     This patch causes the following iounmap erorr and calltrace
>     iounmap: bad address 00000000d0b3631f
> 
>     The original patch was unjustified because amdgpu_device_fini_sw() will
>     always cleanup the rmmio mapping.
> 
>     This reverts commit eb4f139888f636614dab3bcce97ff61cefc4b3a7.
> 
>     Signed-off-by: Ma Jun <Jun.Ma2@....com>
>     Suggested-by: Christian König <christian.koenig@....com>
>     Reviewed-by: Christian König <christian.koenig@....com>
>     Signed-off-by: Alex Deucher <alexander.deucher@....com>

Yes, this should be rejected, I'll go do that now, thanks for pointing
out the revert, we missed that.

greg k-h