[issue825] Kernel crash at mountd startup

[Hasso Tepper <sinknull@xxxxxxxxxxxxxxxxxxxxxxx>]

New submission from Hasso Tepper <hasso@estpak.ee>:

Starting mountd via rc script crashes kernel 100%.

Fatal trap 12: page fault while in kernel mode
mp_lock = 00000000; cpuid = 0; lapic.id = 00000000
fault virtual address   = 0x4030013
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc0335bac
stack pointer           = 0x10:0xe9bc49c0
frame pointer           = 0x10:0xe9bc49e8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 748 (mountd)
current thread          = pri 6
 <- SMP: XXX
kernel: type 12 trap, code=0

CPU0 stopping CPUs: 0x00000002
 stopped
Stopped at      vfs_export+0x63:        calll   *0x14(%ebx)
db> trace
vfs_export(c41f79e0,c41cf420,e9bc4b04,e9bc4b00, e9bc4ab4) at vfs_export+0x63
ffs_mount(c41f79e0,2809104c,bfbff56c,e9acffe8,c4184468) at ffs_mount+0x665
sys_mount(e9bc4cf0,e9bc4d00,10,0,6) at sys_mount+0x6b5
syscall2(e9bc4d40) at syscall2+0x27c
Xint0x80_syscall() at Xint0x80_syscall+0x35

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messages: 3750
nosy: hasso
priority: urgent
status: unread
title: Kernel crash at mountd startup

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DragonFly issue tracker <bugs@lists.dragonflybsd.org>
<http://bugs.dragonflybsd.org/issue825>
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