kern/60123: KASSERT when openeing a fss(4) device

["martin%NetBSD.org@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60123
>Category:       kern
>Synopsis:       KASSERT when openeing a fss(4) device
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Mar 24 10:55:00 +0000 2026
>Originator:     Martin Husemann
>Release:        NetBSD 11.99.5
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD gethsemane.aprisoft.de 11.99.5 NetBSD 11.99.5 (GETHSEMANE) #456: Tue Mar 24 10:07:39 CET 2026 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/macppc/compile/GETHSEMANE macppc
Architecture: powerpc
Machine: macppc
>Description:

Early during a run of the ATF tests the kernel KASSERTs:

[ 2231.5664015] panic: kernel diagnostic assertion "KERNEL_LOCKED_P()" failed: f
ile "../../../../kern/subr_autoconf.c", line 2102
[ 2231.5864123] cpu1: Begin traceback...
[ 2231.5964165] 0x0e7acb60: at vpanic+0x154
[ 2231.6064211] 0x0e7acb90: at kern_assert+0x60
[ 2231.6164260] 0x0e7acbd0: at config_attach_pseudo+0x84
[ 2231.6264307] 0x0e7acbe0: at fss_open+0xec
[ 2231.6364359] 0x0e7acc00: at bdev_open+0x138
[ 2231.6464415] 0x0e7acc40: at spec_open+0x37c
[ 2231.6564459] 0x0e7accc0: at VOP_OPEN+0x4c
[ 2231.6664509] 0x0e7acce0: at vn_open+0x248
[ 2231.6764617] 0x0e7ace00: at do_open+0xac
[ 2231.6764617] 0x0e7ace50: at do_sys_openat+0x9c
[ 2231.6864641] 0x0e7ace90: at sys_open+0x2c
[ 2231.7064842] 0x0e7aceb0: at syscall+0x110




>How-To-Repeat:

run atf tests.

>Fix:
n/a