kern/53942: new ksem code fires KASSERT

[martin%NetBSD.org@localhost]

>Number:         53942
>Category:       kern
>Synopsis:       new ksem code fires KASSERT
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 04 11:30:01 +0000 2019
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.34
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD thirdstage.duskware.de 8.99.34 NetBSD 8.99.34 (MODULAR) #151: Mon Feb 4 09:03:05 CET 2019 martin%thirdstage.duskware.de@localhost:/usr/src/sys/arch/sparc64/compile/MODULAR sparc64
Architecture: sparc64
Machine: sparc64
>Description:

My kernel crashed:

[ 6396.2497750] panic: kernel diagnostic assertion "ks->ks_pshared_proc == NULL"
 failed: file "../../../../kern/uipc_sem.c", line 502

backtrace is:

ksem_free+0x140
ksem_release+0x54
ksem_close_fop+0x48
closef+0x70
exit1+0xf8
sigexit+0xa4


and it happened while running the ATF tests for nfs:


fs/nfs/t_mountd (610/766): 1 test cases
    mountdhup: 

Have not yet tried to reproduce it (but I guess it will be reproducable).

>How-To-Repeat:
see above

>Fix:
n/a