kern/51102: ipintr may double-release mutex?

[martin%NetBSD.org@localhost]

>Number:         51102
>Category:       kern
>Synopsis:       ipintr may double-release mutex?
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 29 10:50:00 +0000 2016
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.29
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD whoever-brings-the-night.aprisoft.de 7.99.29 NetBSD 7.99.29 (WHOEVER) #5: Fri Apr 29 10:19:22 CEST 2016 martin%martins.aprisoft.de@localhost:/ssd/src/sys/arch/sparc64/compile/WHOEVER sparc64
Architecture: sparc64
Machine: sparc64
>Description:

I got a KASSERT failing:

panic: kernel diagnostic assertion "curcpu()->ci_mtx_count == 0" failed: file "../../../../kern/kern_softint.c", line 594 softint_execute: ci_mtx_count (-1) != 0, sh_func 0x12ff2a0 

and sh_func (0x12ff2a0) is ipintr.

Backtrace is:

#2  0x000000000153c63c in vpanic ()
#3  0x000000000162d05c in kern_assert ()
#4  0x00000000015114a8 in softint_dispatch ()
#5  0x0000000001012014 in softint_fastintr ()
#6  0x0000000001510ad8 in softint_schedule ()


>How-To-Repeat:
n/a

>Fix:
n/a