system crash while accessing smbfs: mutex_spin_enter

[Jukka Salmi <j+nbsd%2008.salmi.ch@localhost>]

Hello,

a 4.99.69 i386 system just crashed while trying to access a smb file
system. That smbfs was mounted through a vpn tunnel, and the vpn client
program (vpnc) has exited (for some reason I don't know) at the time
I tried to access the smbfs.

Partial dmesg output:

uvm_fault(0xc050c480, 0, 1) -> 0xe
fatal page fault in supervisor mode
trap type 6 code 0 eip c010cd0b cs 8 eflags 10282 cr2 1 ilevel 6
kernel: supervisor trap page fault, code=0
Stopped in pid 0.41 (system) at netbsd:mutex_spin_enter+0xb:    movb    
0x1(%edx),%ch
db{0}> No such command
db{0}> db{0}> 
mutex_spin_enter(cce0ff84,c1fa9f00,ccb1ccdc,cce0ff3c,c2219e14,c2219e00,ccb1ccec,c0157703,c2219e14,0)
 at netbsd:mutex_spin_enter+0xb
smb_iod_rqprocessed(c2219e14,0,ccb1ccec,c0157755,c2219e30,0,ccb1cd2c,c0157c93,c2219e30,0)
 at netbsd:smb_iod_rqprocessed+0x40
smb_iod_invrq(c2219e30,0,c0466166,0,0,0,c02cc7fc,cc9ce1a0,c2219e28,804bb18) at 
netbsd:smb_iod_invrq+0x33
smb_iod_thread(c2219e00,0,c01002cd,0,c01002cd,0,0,0,0,0) at 
netbsd:smb_iod_thread+0xe3
db{0}> syncing disks... 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 giving up

dumping to dev 0,1 offset 3146535
dump


Any hints?

Jukka

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