kern/38259: vfs_scrubvnlist panic

[kefren%ngnetworks.ro@localhost]

>Number:         38259
>Category:       kern
>Synopsis:       vfs_scrubvnlist panic
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Mar 18 13:15:00 +0000 2008
>Originator:     Mihai Chelaru
>Release:        NetBSD 4.99.55
>Organization:
        
>Environment:
        
        
System: NetBSD kemobile.girsa.ro 4.99.55 NetBSD 4.99.55 (Kefren) #0: Sat Mar 8 
08:07:14 EET 2008 
kefren%kemobile.girsa.ro@localhost:/usr/src/sys/arch/i386/compile/Kefren i386
Architecture: i386
Machine: i386
>Description:
        playing a bit with puffs mounted FSs, results in panic:

#0  0xc044c8a2 in cpu_reboot (howto=260, bootstr=0x0) at 
../../../../arch/i386/i386/machdep.c:881
#1  0xc03b784a in panic (fmt=0xc0655628 "trap") at 
../../../../kern/subr_prf.c:260
#2  0xc0450d53 in trap (frame=0xcce05890) at 
../../../../arch/i386/i386/trap.c:372
#3  0xc01030c8 in calltrap ()
#4  0xc03eb698 in vfs_trybusy (mp=0xcb79a000, op=RW_READER, 
interlock=0xc072d2c0) at ../../../../kern/vfs_subr.c:338
#5  0xc03f2eff in sys_sync (l=0xcd5e1600, v=0x0, retval=0x0) at 
../../../../kern/vfs_syscalls.c:771
#6  0xc03ebbcd in vfs_shutdown () at ../../../../kern/vfs_subr.c:1810
#7  0xc044c979 in cpu_reboot (howto=256, bootstr=0x0) at 
../../../../arch/i386/i386/machdep.c:867
#8  0xc03b784a in panic (fmt=0xc0655628 "trap") at 
../../../../kern/subr_prf.c:260
#9  0xc0450d53 in trap (frame=0xcce05a24) at 
../../../../arch/i386/i386/trap.c:372
#10 0xc01030c8 in calltrap ()
#11 0xc03eaa08 in vfs_scrubvnlist (mp=0xcb79a000) at 
../../../../kern/vfs_subr.c:1704
#12 0xc03f31c9 in dounmount (mp=0xcb79a000, flags=524288, l=0xcd5e1600) at 
../../../../kern/vfs_syscalls.c:732
#13 0xc0298489 in puffs_msgif_close (this=0xcb8aa000) at 
../../../../fs/puffs/puffs_msgif.c:1065
#14 0xc0281ab1 in putter_fop_close (fp=0xcd197140, l=0xcd5e1600) at 
../../../../dev/putter/putter.c:345
#15 0xc03838cc in closef (fp=0xcd197140, l=0xcd5e1600) at 
../../../../kern/kern_descrip.c:1586
#16 0xc0384055 in fdfree (l=0xcd5e1600) at ../../../../kern/kern_descrip.c:1452
#17 0xc038a161 in exit1 (l=0xcd5e1600, rv=11) at 
../../../../kern/kern_exit.c:279
#18 0xc039b0d0 in sigexit (l=0xcd5e1600, signo=11) at 
../../../../kern/kern_sig.c:1997
#19 0xc039d010 in postsig (signo=11) at ../../../../kern/kern_sig.c:1836
#20 0xc039015a in lwp_userret (l=0xcd5e1600) at ../../../../kern/kern_lwp.c:1321
#21 0xc0450ea8 in trap (frame=0xcce05d48) at ../../../../sys/userret.h:101
#22 0xc01030c8 in calltrap ()
        
>How-To-Repeat:
        mount_psshfs, access it a few minutes
        
>Fix:
        

>Unformatted: