linux-cve-announce - CVE-2022-49489: drm/msm/disp/dpu1: set vbif hw config to NULL to avoid use after memory free during pm runtime resume

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Message-ID: <2025022605-CVE-2022-49489-4131@gregkh>
Date: Wed, 26 Feb 2025 03:12:43 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49489: drm/msm/disp/dpu1: set vbif hw config to NULL to avoid use after memory free during pm runtime resume

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

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

drm/msm/disp/dpu1: set vbif hw config to NULL to avoid use after memory free during pm runtime resume

BUG: Unable to handle kernel paging request at virtual address 006b6b6b6b6b6be3

Call trace:
  dpu_vbif_init_memtypes+0x40/0xb8
  dpu_runtime_resume+0xcc/0x1c0
  pm_generic_runtime_resume+0x30/0x44
  __genpd_runtime_resume+0x68/0x7c
  genpd_runtime_resume+0x134/0x258
  __rpm_callback+0x98/0x138
  rpm_callback+0x30/0x88
  rpm_resume+0x36c/0x49c
  __pm_runtime_resume+0x80/0xb0
  dpu_core_irq_uninstall+0x30/0xb0
  dpu_irq_uninstall+0x18/0x24
  msm_drm_uninit+0xd8/0x16c

Patchwork: https://patchwork.freedesktop.org/patch/483255/
[DB: fixed Fixes tag]

The Linux kernel CVE team has assigned CVE-2022-49489 to this issue.


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

	Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 4.19.247 with commit aa4cb188988dc6f1b3f4917d4dbc452150a5d871
	Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 5.4.198 with commit ef10d0c68e8608848cd58fca2589685718426607
	Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 5.10.121 with commit 134760263f6441741db0b2970e7face6b34b6d1c
	Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 5.15.46 with commit ef4bdaac7cb5416f236613ed9337ff0ea8ee329b
	Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 5.17.14 with commit 97ac682b6f7d36be5d934f86c9911066540a68f1
	Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 5.18.3 with commit 5b0adf5cbf3b74721e4e4c4e0cadc91b8df8bcc2
	Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 5.19 with commit fa5186b279ecf44b14fb435540d2065be91cb1ed

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-2022-49489
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/dpu1/dpu_kms.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/aa4cb188988dc6f1b3f4917d4dbc452150a5d871
	https://git.kernel.org/stable/c/ef10d0c68e8608848cd58fca2589685718426607
	https://git.kernel.org/stable/c/134760263f6441741db0b2970e7face6b34b6d1c
	https://git.kernel.org/stable/c/ef4bdaac7cb5416f236613ed9337ff0ea8ee329b
	https://git.kernel.org/stable/c/97ac682b6f7d36be5d934f86c9911066540a68f1
	https://git.kernel.org/stable/c/5b0adf5cbf3b74721e4e4c4e0cadc91b8df8bcc2
	https://git.kernel.org/stable/c/fa5186b279ecf44b14fb435540d2065be91cb1ed