linux-kernel - Re: CVE-2024-46808: drm/amd/display: Add missing NULL pointer check within dpcd_extend_address

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <khg5rxxfvmdfjze2tpdamrnhsry7jd4eptxfdkht5nnpjacpy3@rhlk7omy3ulc>
Date: Mon, 30 Sep 2024 20:58:41 +0200
From: Michal Koutný <mkoutny@...e.com>
To: cve@...nel.org, linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Tom Chung <chiahsuan.chung@....com>, Hersen Wu <hersenxs.wu@....com>
Subject: Re: CVE-2024-46808: drm/amd/display: Add missing NULL pointer check
 within dpcd_extend_address_range

Hello.

On Fri, Sep 27, 2024 at 02:36:13PM GMT, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> In the Linux kernel, the following vulnerability has been resolved:
> 
> drm/amd/display: Add missing NULL pointer check within dpcd_extend_address_range
> 
> [Why & How]
> ASSERT if return NULL from kcalloc.
> 
> The Linux kernel CVE team has assigned CVE-2024-46808 to this issue.

This is not a good CVE fix since it'd bring the system down for users
with panic_on_warn=1 anyway. (I wasn't able to `make
drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.i` but I assume
the ASSERTs expand to one of the WARN_ONs, feel free to correct me.)

It'd need graceful handling of the kcalloc failure.

Michal

Download attachment "signature.asc" of type "application/pgp-signature" (229 bytes)