From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-cve-announce@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: CVE-2022-49488: drm/msm/mdp5: Return error code in mdp5_mixer_release when deadlock is detected
Date: Wed, 26 Feb 2025 03:12:42 +0100 [thread overview]
Message-ID: <2025022605-CVE-2022-49488-5f36@gregkh> (raw)
Description
===========
In the Linux kernel, the following vulnerability has been resolved:
drm/msm/mdp5: Return error code in mdp5_mixer_release when deadlock is detected
There is a possibility for mdp5_get_global_state to return
-EDEADLK when acquiring the modeset lock, but currently global_state in
mdp5_mixer_release doesn't check for if an error is returned.
To avoid a NULL dereference error, let's have mdp5_mixer_release
check if an error is returned and propagate that error.
Patchwork: https://patchwork.freedesktop.org/patch/485181/
The Linux kernel CVE team has assigned CVE-2022-49488 to this issue.
Affected and fixed versions
===========================
Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 4.19.247 with commit 1a5d1474026ea4f1a6f931075ca2adb884af39cf
Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.4.198 with commit 22d8424913b1348c6324916745fadaeea5273f0e
Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.10.121 with commit 883f1d52a57bf51e1d7a80c432345e2c6222477e
Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.15.46 with commit 09bdeedc1fc53e64b8282e1de67752c69e43bdba
Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.17.14 with commit 47e393061049aff6818d1b9fdca7351411a23fc2
Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.18.3 with commit 46e5ce63924a96af452c4fc5ee0bb3b241e1b9f4
Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.19 with commit ca75f6f7c6f89365e40f10f641b15981b1f07c31
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-2022-49488
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/msm/disp/mdp5/mdp5_crtc.c
drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.c
drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.h
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/1a5d1474026ea4f1a6f931075ca2adb884af39cf
https://git.kernel.org/stable/c/22d8424913b1348c6324916745fadaeea5273f0e
https://git.kernel.org/stable/c/883f1d52a57bf51e1d7a80c432345e2c6222477e
https://git.kernel.org/stable/c/09bdeedc1fc53e64b8282e1de67752c69e43bdba
https://git.kernel.org/stable/c/47e393061049aff6818d1b9fdca7351411a23fc2
https://git.kernel.org/stable/c/46e5ce63924a96af452c4fc5ee0bb3b241e1b9f4
https://git.kernel.org/stable/c/ca75f6f7c6f89365e40f10f641b15981b1f07c31
reply other threads:[~2025-02-26 2:14 UTC|newest]
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