ktrace: do not enqueue request if the process' ktrioparams are freed
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Authored by kib on Tue, Jan 20, 7:38 PM.

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rG6bb3f208617b: ktrace: do not enqueue request if the process' ktrioparams are freed

Summary

The p_ktrioparms are freed on termination of tracing.  Any ktr requests
added to the queue after that would hang there and leak on the struct
proc recycling, or trigger an assert in the process destructor for debug
builds.

Reported and tested by: pho