kern/41145: tmpfs panic kernel diagnostic assertion "de->td_node == node" failed

[Bernd Ernesti <pr200910%veego.de@localhost>]

>Number:         41145
>Category:       kern
>Synopsis:       tmpfs panic kernel diagnostic assertion "de->td_node == node" 
>failed
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 05 13:10:01 +0000 2009
>Originator:     Bernd Ernesti
>Release:        NetBSD 5.99.10 05-Apr-2009 08:00 UTC
>Organization:
        
>Environment:
System: NetBSD 5.99.10
Architecture: i386
Machine: i386
>Description:
        I got the a panic while building libc with '-j 4'.
        /tmp is a tmpfs.
        wapbl is not in use (even not compiled into the kernel)

        The following panic may contain typos since it was hand written:

panic: kernel diagnostic assertion "de->td_node == node" failed: file 
"/src/sys/fs/tmpfs/tmpfs_vnops.c", line 659
fatal breakpoint trap in supervisor mode
trap type 1 code 0 eip c01fad54 cs 8 eflags 246 cr2 b7615000 ilevel 0
Stopped in pid 11242.1 (make) at netbsd:breakpoint+0x4: popl %ebp

breakpoint(0,0,14,d0f3dbd8,d0422eb0,d0358348,d0f3dbfc,c06b8cee,c09054f8,c086a9d3)
 at netsbd:breakpoint+0x4
panic(c09054f8,c086a9d3,c08dea14,c08deb0c,293,0,ffffffff,d036f004,d0358348,d3f8f5cc)
 at netbsd:panic+0x1b9
__kernassert(c086a0d3,c08deb0c,293,c08dea14,d0f3dcb8,0,c014,d03563a8,d0f3dcb8,d0358f50)
 at netbsd:__kernassert+0x2e
tmpfs_remove(d0f3dc58,bfbfda48,7c,0,f,c0861840,d03563a8,d3f8f5cc,d0f3dcb8,d3f8f5cc)
 at netbsd:tmpffs_remove+0x36a
VOP_REMOVE(d03563a8,d3f8f5cc,d0f3dcb8,6,0,25419a72,49d8487,bfbfdb2c,0,0) at 
netbsd:VOP_REMOVE+0x6d
do_sys_unlink(bfbfdb2c,0,d0f3dd28,d0eb5d3c,d0aec430,d0aec430,d0eb5d3c,bfbfdb2c,bfbfda48,49d8a487)
 at netbsd:do_sys_unlink+0xad
syscall)d0f3dd48,b3,ab,1f,1f,bfbfdb3c,7,bfbfdac8,bfbfdb2c,0) at 
netbsd:syscall+0xc0

>How-To-Repeat:
        make -j 4 dependall in src/libc with a tmpfs /tmp
>Fix: