kern/56344: KASSERT LIST_EMPTY(&l->l_pi_lenders) failing

[martin%NetBSD.org@localhost]

>Number:         56344
>Category:       kern
>Synopsis:       KASSERT LIST_EMPTY(&l->l_pi_lenders) failing
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 02 06:05:00 +0000 2021
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.87
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD gethsemane.aprisoft.de 9.99.87 NetBSD 9.99.87 (GETHSEMANE) #122: Sun Aug 1 13:22:34 CEST 2021 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/macppc/compile/GETHSEMANE macppc
Architecture: powerpc
Machine: macppc
>Description:

After a completed (full) ATF test run, I tried to kill a leftover rump_server
process by doing:

 # pkill -9 rump_server

This made the machine crash:

[ 31500.6372679] panic: kernel diagnostic assertion "SLIST_EMPTY(&l->l_pi_lenders)" failed: file "../../../../kern/kern_lwp.c", line 1338 
[ 31500.6672132] cpu1: Begin traceback...
[ 31500.6672132] 0x102a5cc0: at vpanic+0x12c
[ 31500.6872243] 0x102a5cf0: at kern_assert+0x60
[ 31500.6972285] 0x102a5d30: at lwp_free+0x434
[ 31500.6972285] 0x102a5d60: at do_sys_waitid+0x6f8
[ 31500.7172384] 0x102a5e40: at sys___wait450+0x40
[ 31500.7272433] 0x102a5eb0: at syscall+0x350



>How-To-Repeat:
s/a

>Fix:
n/a