CVE-2022-49229

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ptp: unregister virtual clocks when unregistering physical clock.<br /> <br /> When unregistering a physical clock which has some virtual clocks,<br /> unregister the virtual clocks with it.<br /> <br /> This fixes the following oops, which can be triggered by unloading<br /> a driver providing a PTP clock when it has enabled virtual clocks:<br /> <br /> BUG: unable to handle page fault for address: ffffffffc04fc4d8<br /> Oops: 0000 [#1] PREEMPT SMP NOPTI<br /> RIP: 0010:ptp_vclock_read+0x31/0xb0<br /> Call Trace:<br /> timecounter_read+0xf/0x50<br /> ptp_vclock_refresh+0x2c/0x50<br /> ? ptp_clock_release+0x40/0x40<br /> ptp_aux_kworker+0x17/0x30<br /> kthread_worker_fn+0x9b/0x240<br /> ? kthread_should_park+0x30/0x30<br /> kthread+0xe2/0x110<br /> ? kthread_complete_and_exit+0x20/0x20<br /> ret_from_fork+0x22/0x30