Re: [PATCH net] ptp: ocp: prevent watchdog rearming during detach

[Runyu Xiao]

Thanks for the review.

After checking the timer implementation, I agree that the original bug
premise was incorrect. The watchdog is only armed during clock
initialization and rearmed by its own callback. timer_delete_sync() waits
for the callback to finish and removes a timer rearmed by that callback
before returning.

There is no independent rearm path during ptp_ocp_detach(), so the claimed
use-after-free is not reachable.

I will withdraw this patch and will not send a v2. The Fixes and Cc: stable
tags are therefore not appropriate.

Regards,

Runyu