linux-kernel - Re: CVE-2024-46805: drm/amdgpu: fix the waring dereferencing hive

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Message-ID: <2024093010-itunes-helper-82ef@gregkh>
Date: Mon, 30 Sep 2024 20:27:36 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Michal Koutný <mkoutny@...e.com>
Cc: cve@...nel.org, linux-kernel@...r.kernel.org,
	Jesse Zhang <Jesse.Zhang@....com>, Tim Huang <Tim.Huang@....com>,
	Alex Deucher <alexander.deucher@....com>
Subject: Re: CVE-2024-46805: drm/amdgpu: fix the waring dereferencing hive

On Mon, Sep 30, 2024 at 08:17:16PM +0200, Michal Koutný wrote:
> Hello.
> 
> On Fri, Sep 27, 2024 at 02:36:10PM GMT, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> > In the Linux kernel, the following vulnerability has been resolved:
> > 
> > drm/amdgpu: fix the waring dereferencing hive
> > 
> > Check the amdgpu_hive_info *hive that maybe is NULL.
> 
> This "fix" introduces (or transforms) a CVE for panic_on_warn=1 users
> (if the NULL is reachable by unprivileged users).

That it does.

> The NULL ptr dereference thus needs a better fix (I checked in
> v6.12-rc1).

Please submit one for inclusion :)

thanks,

greg k-h