Use After Free (UAF) at the release of ptp_clock

Solution Verified - Updated -

Issue

  • Use after free in cdev_put() when a PTP device is removed while its chardev is open
  • Use After Free (UAF) at the release of ptp_clock
  • BUG: unable to handle kernel paging request in plist_add()

Environment

  • Red Hat Enterprise Linux (RHEL) 7
  • Red Hat Enterprise Linux (RHEL) 8

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