NULL pointer dereference when trying to mount nfs-root using 2.4.19-pre8

["John Bäckstrand" <sandos@home.se>]

[-- Attachment #1: Type: text/plain, Size: 952 bytes --]

I have been playing around with nfs-root the last
couple of days, using 2.2.x kernels on the bootfloppy.
I only have 16mb ram in the diskless box, so I had to
compile a kernel with NBD to use for swap. I didnt get
this to work with 2.2 kernels, so I tried building
2.4.19-pre8. (Which I btw had to patch in nfsroot.c to
get compiled, I know this is known though)

I am _not_ using bootp/rarp/dhcp, but rather an ip on
the commandline to the kernel using lilo. I tried
configuring the kernel both with rarp support and
without.

Anyway, right after printing the line "NET4: Unix
domain sockets ..." it Oopses, saying "cant handle NULL
pointer dereference at " and "process swapper (pid 1,
stackpage=c000b000)

Then I also get "Kernel panic: Trying to kill init"

My 3c509 is up, the kernel prints "short UDP packet
recevied" every now and then if I let the box be up, I
can even ping the box after this Oops.

Any ideas about this?

---
John Bäckstrand

[-- Attachment #2: .config --]
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# Loadable module support
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# General setup
#
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# CONFIG_KCORE_AOUT is not set
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#
# Memory Technology Devices (MTD)
#
# CONFIG_MTD is not set

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# Parallel port support
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#
# Plug and Play configuration
#
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# Block devices
#
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# Multi-device support (RAID and LVM)
#
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# Networking options
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#
# Appletalk devices
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#
# QoS and/or fair queueing
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# CONFIG_NET_SCHED is not set

#
# Network testing
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#
# Telephony Support
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#
# ATA/IDE/MFM/RLL support
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#
# SCSI support
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#
# Fusion MPT device support
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#
# I2O device support
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#
# Network device support
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#
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# CONFIG_NET_SB1000 is not set

#
# Ethernet (10 or 100Mbit)
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# CONFIG_SUNQE is not set
# CONFIG_SUNGEM is not set
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# CONFIG_ELPLUS is not set
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# CONFIG_AT1700 is not set
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#
# Ethernet (1000 Mbit)
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#
# Wireless LAN (non-hamradio)
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# Token Ring devices
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#
# Wan interfaces
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# CONFIG_WAN is not set

#
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# I2C support
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# Mice
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# Watchdog Cards
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#
# Ftape, the floppy tape device driver
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# Multimedia devices
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# CONFIG_SOUND_EMU10K1 is not set
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# CONFIG_SOUND_ES1370 is not set
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# CONFIG_SOUND_MAESTRO3 is not set
# CONFIG_SOUND_ICH is not set
# CONFIG_SOUND_RME96XX is not set
# CONFIG_SOUND_SONICVIBES is not set
# CONFIG_SOUND_TRIDENT is not set
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# CONFIG_MIDI_VIA82CXXX is not set
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# CONFIG_SOUND_SSCAPE is not set
# CONFIG_SOUND_GUS is not set
# CONFIG_SOUND_VMIDI is not set
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# CONFIG_SOUND_MSS is not set
# CONFIG_SOUND_MPU401 is not set
# CONFIG_SOUND_NM256 is not set
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# CONFIG_SOUND_PAS is not set
# CONFIG_PAS_JOYSTICK is not set
# CONFIG_SOUND_PSS is not set
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# CONFIG_SOUND_MAUI is not set
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# CONFIG_SOUND_YMFPCI_LEGACY is not set
# CONFIG_SOUND_UART6850 is not set
# CONFIG_SOUND_AEDSP16 is not set
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#
# USB support
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#
# Bluetooth support
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# CONFIG_BLUEZ is not set

#
# Kernel hacking
#
# CONFIG_DEBUG_KERNEL is not set