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 ]---

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-50319
• https://git.kernel.org/stable/c/18b9202188a4e59923834c60b5c82ea1da7d1811
• https://git.kernel.org/stable/c/20ee8c223f792947378196307d8e707c9cdc2d61
• https://git.kernel.org/stable/c/2ea334960afcd49385840c7afd59fc5f8d3ce682
• https://git.kernel.org/stable/c/3c18888bc0b51835c74123b1e04d5df11543724c