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Change History

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

iavf: fix PTP use-after-free during reset

Commit 7c01dbfc8a1c5f ("iavf: periodically cache PHC time") introduced a
worker to cache PHC time, but failed to stop it during reset or disable.

This creates a race condition where `iavf_reset_task()` or
`iavf_disable_vf()` free adapter resources (AQ) while the worker is still
running. If the worker triggers `iavf_queue_ptp_cmd()` during teardown, it
accesses freed memory/locks, leading to a crash.

Fix this by calling `iavf_ptp_release()` before tearing down the adapter.
This ensures `ptp_clock_unregister()` synchronously cancels the worker and
cleans up the chardev before the backing resources are destroyed.

https://git.kernel.org/stable/c/1b034f2429ce6b45ce74dc266175d277acafc5c4

https://git.kernel.org/stable/c/90cc8b2add29b57288025b51c70bc647e7cccb12

https://git.kernel.org/stable/c/efc54fb13d79117a825fef17364315a58682c7ec