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kern/49410: -current: panic: "KERNEL_LOCKED_P()" failed: file ".../if_loop.c", line 221

>Number:         49410
>Category:       kern
>Synopsis:       -current MROUTING enabled kernel panics in if_loop.c:221 with KERNEL_LOCKED_P assertion
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Nov 22 15:35:00 +0000 2014
>Originator:     Charlie Root
>Release:        NetBSD 7.99.1
System: NetBSD 7.99.1 NetBSD 7.99.1 (GATEWAY) #21: Sat Nov 22 13:49:32 CET 2014 amd64
Architecture: x86_64
Machine: amd64
	A -current kernel with multicast support panics due to locking error.

panic: kernel diagnostic assertion "KERNEL_LOCKED_P()" failed: file "/fs/raid1a/src/NetBSD/cur/src/sys/net/if_loop.c", line 221
cpu1: Begin traceback...
vpanic() at netbsd:vpanic+0x13c
kern_assert() at netbsd:kern_assert+0x4f
looutput() at netbsd:looutput+0x39e
ip_output() at netbsd:ip_output+0x8b0
igmp_sendpkt.isra.1() at netbsd:igmp_sendpkt.isra.1+0x117
igmp_fasttimo() at netbsd:igmp_fasttimo+0xb3
pffasttimo() at netbsd:pffasttimo+0x31
callout_softclock() at netbsd:callout_softclock+0x1d0
softint_dispatch() at netbsd:softint_dispatch+0xd3
	pick -current kernel with MROUTING enabled and run with
	multicast services like mrouted and multiple interfaces
	and watch it panic while trying to reach multi user.
	With MROUTING disabled the kernel will survive the startup
	but that is not the solution.

 	-current of 20141122

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