kern/60351: l2tp(4): panic: kernel diagnostic assertion "!simplehook_has_hooks(ifp->if_linkstate_hooks)" failed: file "/home/riastradh/netbsd/11/src/sys/net/if.c", line 1544

["campbell+netbsd%mumble.net@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60351
>Category:       kern
>Synopsis:       l2tp(4): panic: kernel diagnostic assertion "!simplehook_has_hooks(ifp->if_linkstate_hooks)" failed: file "/home/riastradh/netbsd/11/src/sys/net/if.c", line 1544
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jun 23 04:05:00 +0000 2026
>Originator:     Taylor R Campbell
>Release:        11
>Organization:
The NetL2TP Crashination, Inc.
>Environment:
>Description:

[ 670764.019095] panic: kernel diagnostic assertion "!simplehook_has_hooks(ifp->if_linkstate_hooks)" failed: file "/home/riastradh/netbsd/11/src/sys/net/if.c", line 1544
[ 670764.019095] cpu0: Begin traceback...
[ 670764.020095] vpanic() at netbsd:vpanic+0x171
[ 670764.021095] kern_assert() at netbsd:kern_assert+0x4b
[ 670764.022095] if_detach() at netbsd:if_detach+0x799
[ 670764.024095] l2tp_clone_destroy() at netbsd:l2tp_clone_destroy+0xe5
[ 670764.025095] doifioctl() at netbsd:doifioctl+0xb90
[ 670764.026095] sys_ioctl() at netbsd:sys_ioctl+0x4ca
[ 670764.028095] syscall() at netbsd:syscall+0x9d
[ 670764.028095] --- syscall (number 54) ---
[ 670764.029095] netbsd:syscall+0x9d:
[ 670764.029095] cpu0: End traceback...

>How-To-Repeat:

	ifconfig bridge1 create up
	ifconfig l2tp1 create up
	brconfig bridge1 add l2tp1
	ifconfig l2tp1 destroy

>Fix:

	Yes, please!