Riskcovery

CVE-2022-49229

ptp: unregister virtual clocks when unregistering physical clock.

State
Published
Severity
Not scored
Published
Feb 26, 2025
Updated
May 11, 2026
Reserved
Feb 26, 2025

Read the record on cve.org

Description

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

ptp: unregister virtual clocks when unregistering physical clock.

When unregistering a physical clock which has some virtual clocks, unregister the virtual clocks with it.

This fixes the following oops, which can be triggered by unloading a driver providing a PTP clock when it has enabled virtual clocks:

BUG: unable to handle page fault for address: ffffffffc04fc4d8 Oops: 0000 [#1] PREEMPT SMP NOPTI RIP: 0010:ptp_vclock_read+0x31/0xb0 Call Trace: timecounter_read+0xf/0x50 ptp_vclock_refresh+0x2c/0x50 ? ptp_clock_release+0x40/0x40 ptp_aux_kworker+0x17/0x30 kthread_worker_fn+0x9b/0x240 ? kthread_should_park+0x30/0x30 kthread+0xe2/0x110 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 73f37068d540eba5f93ba3a0019bf479d35ebd76 to before b2dea2a696d09163da4cd33cb598ce1f73e86597Affected
  • 73f37068d540eba5f93ba3a0019bf479d35ebd76 to before 9c796a57cbb5daf124a665689f0b2bc9262e0cedAffected
  • 73f37068d540eba5f93ba3a0019bf479d35ebd76 to before c49eafe6249f844c26f9866886cc6719d81762dfAffected
  • 73f37068d540eba5f93ba3a0019bf479d35ebd76 to before bfcbb76b0f595ea9ede9f7a218086fef85242f10Affected
LinuxLinux
  • 5.14Affected
  • before 5.14Not affected
  • 5.15.33 through 5.15.*Not affected
  • 5.16.19 through 5.16.*Not affected
  • 5.17.2 through 5.17.*Not affected
  • 5.18 and laterNot affected

References

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