kern/54979: radixtree might misbehave if ENOMEM

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>Number:         54979
>Category:       kern
>Synopsis:       radixtree might misbehave if ENOMEM
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 17 22:25:00 +0000 2020
>Originator:     Andrew Doran
>Release:        NetBSD-current
>Organization:
	The NetBSD Project
>Environment:
NetBSD
Architecture: x86_64
Machine: amd64
>Description:
	maxv@ indicates on tech-kern that radixtree might screw up
	on ENOMEM, which would tally with failures exposed by syzbot.
>How-To-Repeat:
	Code inspection, intuition, syzbot.
>Fix:
	Yes please - start by inspecting the failure path.