[issue825] Kernel crash at mountd startup

[Matthew Dillon]

:New submission from Hasso Tepper <hasso at estpak.ee>:
:
:Starting mountd via rc script crashes kernel 100%.
:
:Fatal trap 12: page fault while in kernel mode
:mp_lock =3D 00000000; cpuid =3D 0; lapic.id =3D 00000000
:fault virtual address   =3D 0x4030013
:fault code              =3D supervisor read, page not present
:instruction pointer     =3D 0x8:0xc0335bac
:stack pointer           =3D 0x10:0xe9bc49c0
:frame pointer           =3D 0x10:0xe9bc49e8
:code segment            =3D base 0x0, limit 0xfffff, type 0x1b
:                        =3D DPL 0, pres 1, def32 1, gran 1
:processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
:current process         =3D 748 (mountd)
:current thread          =3D pri 6
: <- SMP: XXX
:kernel: type 12 trap, code=3D0
:
: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

    Can you get a kernel core out of it?  Also, what types of filesystems
    are you trying to export?  What's your /etc/fstab and /etc/exports
    look like ?

						-Matt