linux-cve-announce - CVE-2022-50319: coresight: trbe: remove cpuhp instance node before remove cpuhp state

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Message-ID: <2025091553-CVE-2022-50319-6747@gregkh>
Date: Mon, 15 Sep 2025 16:48:56 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50319: coresight: trbe: remove cpuhp instance node before remove cpuhp state

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

coresight: trbe: remove cpuhp instance node before remove cpuhp state

cpuhp_state_add_instance() and cpuhp_state_remove_instance() should
be used in pairs. Or there will lead to the warn on
cpuhp_remove_multi_state() since the cpuhp_step list is not empty.

The following is the error log with 'rmmod coresight-trbe':
Error: Removing state 215 which has instances left.
Call trace:
  __cpuhp_remove_state_cpuslocked+0x144/0x160
  __cpuhp_remove_state+0xac/0x100
  arm_trbe_device_remove+0x2c/0x60 [coresight_trbe]
  platform_remove+0x34/0x70
  device_remove+0x54/0x90
  device_release_driver_internal+0x1e4/0x250
  driver_detach+0x5c/0xb0
  bus_remove_driver+0x64/0xc0
  driver_unregister+0x3c/0x70
  platform_driver_unregister+0x20/0x30
  arm_trbe_exit+0x1c/0x658 [coresight_trbe]
  __arm64_sys_delete_module+0x1ac/0x24c
  invoke_syscall+0x50/0x120
  el0_svc_common.constprop.0+0x58/0x1a0
  do_el0_svc+0x38/0xd0
  el0_svc+0x2c/0xc0
  el0t_64_sync_handler+0x1ac/0x1b0
  el0t_64_sync+0x19c/0x1a0
 ---[ end trace 0000000000000000 ]---

The Linux kernel CVE team has assigned CVE-2022-50319 to this issue.


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

	Issue introduced in 5.13 with commit 3fbf7f011f2426dac8c982f1d2ef469a7959a524 and fixed in 5.15.86 with commit 18b9202188a4e59923834c60b5c82ea1da7d1811
	Issue introduced in 5.13 with commit 3fbf7f011f2426dac8c982f1d2ef469a7959a524 and fixed in 6.0.16 with commit 2ea334960afcd49385840c7afd59fc5f8d3ce682
	Issue introduced in 5.13 with commit 3fbf7f011f2426dac8c982f1d2ef469a7959a524 and fixed in 6.1.2 with commit 3c18888bc0b51835c74123b1e04d5df11543724c
	Issue introduced in 5.13 with commit 3fbf7f011f2426dac8c982f1d2ef469a7959a524 and fixed in 6.2 with commit 20ee8c223f792947378196307d8e707c9cdc2d61

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-2022-50319
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/hwtracing/coresight/coresight-trbe.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/18b9202188a4e59923834c60b5c82ea1da7d1811
	https://git.kernel.org/stable/c/2ea334960afcd49385840c7afd59fc5f8d3ce682
	https://git.kernel.org/stable/c/3c18888bc0b51835c74123b1e04d5df11543724c
	https://git.kernel.org/stable/c/20ee8c223f792947378196307d8e707c9cdc2d61