Re: [BUG] Oops booting linux-2.4.18-pre7-ac3

[Andrew Morton <akpm@zip.com.au>]

Spider wrote:
> 
> This is pretty much the same as "oops booting 2.4.18-pre7-ac3" by "Todd M. Roy" <troy@holstein.com> but I post it as well.
> 
> I'm not subscribed, so if you wish more information (.config, other info on hardware/software installed) please cc' me.
> 
> //Spider
> 
> PCI: PCI BIOS revision 2.10 entry at 0xf1150, last bus=1
> PCI: Using configuration type 1
> PCI: Probing PCI hardware
> PCI: Using IRQ router VIA [1106/0686] at 00:04.0
> PCI: Disabling Via external APIC routing
> PnPBIOS: Found PnP BIOS installation structure at 0xc00fc2b0.
> PnPBIOS: PnP BIOS version 1.0, entry 0xf0000:0xc2e0, dseg 0xf0000.
> PnPBIOS: 12 nodes reported by PnP BIOS; 12 recorded by driver.
> PnPBIOS: PNP0c02: ioport range 0xe400-0xe47f has been reserved.
> PnPBIOS: PNP0c02: ioport range 0xe800-0xe83f could not be reserved.
> Linux NET4.0 for Linux 2.4
> Based upon Swansea University Computer Society NET3.039
> Initializing RT netlink socket
> Unable to handle kernel NULL pointer dereference at virtual address 0000002c

Yes, sorry - I didn't test against Alan's pnpbios driver.

The problem is this, in init/main.c:

#ifdef CONFIG_PNPBIOS
    pnpbios_init();
#endif
    ....
    start_context_thread();
    do_initcalls();

pnpbios_init() launches a kernel thread which calls the kernel/user.c
code before the user.c's initcall has had a chance to initialise things.

I've asked Alan to back out the rather unimportant set_user-in-reparent_to_init
fix while we contemplate this.

I suggest you disable the pnpbios driver in kernel config in -ac3.


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