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From
SubjectRe: 2.5.67-mm2
Date
Joshua Kwan wrote:

[snip]
>
> Unable to handle kernel NULL pointer dereference at virtual address
> 00000040
> printing eip:
> c0223cf4
> *pde = 00000000
> Oops: 0002 [#1]
> CPU: 0
> EIP: 0060:[<c0223cf4>] Not tainted VLI
> EFLAGS: 00010282
> EIP is at devclass_add_driver+0x34/0x8a
> eax: 00000040 ebx: fffffff8 ecx: fffffff0 edx: ffff0001
> esi: 00000040 edi: 00000000 ebp: c03af298 esp: c1297f50
> ds: 0007b es: 007b ss: 0068
> Process swapper: (pid: 1, threadinfo=c1296000 task=c1294080)
> Stack: c03af500 c03af2b4 c03ae7c4 00000000 c03ae780 c0223620 c03af298
> c03af280
> 00000001 00000000 00000000 c0223a72 c03af298 c0223a72 c03af048
> fffffffc 00000034 c026d15d c03af298 c01afc02 c03af048 c0402ebe
> c03af020 0000003c
> Call Trace:
> [<c0223620>] bus_add_driver+0x82/0xd2
> [<c0223a72>] driver_register+0x38/0x3c
> [<c0223a72>] driver_register+0x38/0x3c
> [<c026d15d>] usb_register+0x73/0xae
> [<c01afc02>] pci_register_driver+0x47/0x57
> [<c0402ebe>] uhci_hcd_init+0xd9/0x137
> [<c0402f2b>] hid_init+0xf/0x21
> [<c03ec6e0>] do_initcalls+0x28/0x94
> [<c0129ce8>] init_workqueues+0xf/0x27
> [<c0105099>] init+0x36/0x195
> [<c0105063>] init+0x0/0x195
> [<c0106ffd>] kernel_thread_helper+0x5/0xb
>
> Code: 24 0c 89 6c 24 10 89 74 24 08 8b 6c 24 18 31 ff 8b 45 08 89 04
24 e8
> f7 02 00 00 85 c0 89 c3 74 4a 8d 70 48 ba 01 00 ff ff 98 f0 <0f> c1 10
85
> d2 0f 85 f 03 00 00 89 2c 24 e8 c0 fe ff ff 85 c0
> <0>Kernel panic: Attempted to kill init!
>
> This doesn't happen with 2.5.67{-bk4}. I looked at the USB changes for
> 2.5.67-mm2 and they are just about the same as in -bk4. I didn't look
> at every line, though.

I get the same thing on an mm2 boot. Are you certain it isn't a -bk4
bug? kobject, bus_add_driver and friends have all been touched by greg
in bk, and I can't see anything immediately obvious in the new -mm
patches (-mm1 works fine).

I'll try with just the linus drop now.

Cheers,
Alistair.

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