linux-cve-announce - CVE-2024-56752: drm/nouveau/gr/gf100: Fix missing unlock in gf100_gr_chan

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Message-ID: <2024122927-CVE-2024-56752-09d2@gregkh>
Date: Sun, 29 Dec 2024 12:29:45 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56752: drm/nouveau/gr/gf100: Fix missing unlock in gf100_gr_chan_new()

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

drm/nouveau/gr/gf100: Fix missing unlock in gf100_gr_chan_new()

When the call to gf100_grctx_generate() fails, unlock gr->fecs.mutex
before returning the error.

Fixes smatch warning:

drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c:480 gf100_gr_chan_new() warn: inconsistent returns '&gr->fecs.mutex'.

The Linux kernel CVE team has assigned CVE-2024-56752 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.2 with commit ca081fff6ecc63c86a99918230cc9b947bebae8a and fixed in 6.6.64 with commit 237f2dbfa00576bb1aa8dc2dce403c64e53270e6
	Issue introduced in 6.2 with commit ca081fff6ecc63c86a99918230cc9b947bebae8a and fixed in 6.11.11 with commit 22b4a623c0f230540f02f4358744cce62ae12dbf
	Issue introduced in 6.2 with commit ca081fff6ecc63c86a99918230cc9b947bebae8a and fixed in 6.12.2 with commit 24b1df744ef444f9846f52de4985790a5fd1c0de
	Issue introduced in 6.2 with commit ca081fff6ecc63c86a99918230cc9b947bebae8a and fixed in 6.13-rc1 with commit a2f599046c671d6b46d93aed95b37241ce4504cf

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2024-56752
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/237f2dbfa00576bb1aa8dc2dce403c64e53270e6
	https://git.kernel.org/stable/c/22b4a623c0f230540f02f4358744cce62ae12dbf
	https://git.kernel.org/stable/c/24b1df744ef444f9846f52de4985790a5fd1c0de
	https://git.kernel.org/stable/c/a2f599046c671d6b46d93aed95b37241ce4504cf