kern/56653: crash in ipv6 reassembly

[christos%netbsd.org@localhost]

>Number:         56653
>Category:       kern
>Synopsis:       kernel crash in ipv6 fragment reassembly
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 22 17:00:01 +0000 2022
>Originator:     christos%netbsd.org@localhost
>Release:        NetBSD 9.99.91
>Organization:
	Maximal Entropy Inc,
>Environment:
System: NetBSD blinky.astron.com 9.99.91 NetBSD 9.99.91 (GENERIC) #79: Tue Oct 12 09:25:58 EDT 2021 christos%quasar.astron.com@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
	Kernel crashes in fragment re-assembly.
>How-To-Repeat:
	Configure a LOCKDEBUG kernel as a router, route IPv6 traffic,
	observe crash.
	#0  0xffffffff80226155 in cpu_reboot ()
	#1  0xffffffff80d10b07 in kern_reboot ()
	#2  0xffffffff80d56082 in vpanic ()
	#3  0xffffffff80d56147 in panic ()
	#4  0xffffffff80d4a4c8 in lockdebug_abort1 ()
	#5  0xffffffff80cfb688 in _kernel_lock ()
	#6  0xffffffff80a53c44 in frag6_fasttimo ()
	#7  0xffffffff80d8705a in pffasttimo ()
	#8  0xffffffff80d2f40e in callout_softclock ()
	#9  0xffffffff80d1f5fb in softint_dispatch ()
	#10 0xffffffff80220e3f in Xsoftintr ()
>Fix:
	Please!