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

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Message-ID: <fwxfulgwpt3f6hijwg6vh4ujrfq2lj3wvp4kq4sm2hbptmp6f7@7nybfmvb7ihr>
Date: Mon, 30 Sep 2024 20:17:16 +0200
From: Michal Koutný <mkoutny@...e.com>
To: cve@...nel.org, linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.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

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).

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

Michal

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