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    SubjectRe: [BUG] Early Kernel Panic with 2.6.15-rc5
    Ashutosh Naik <ashutosh.naik@gmail.com> wrote:
    >
    > Distribution:
    > Fedora Core 2, 2.6.15-rc5 kernel
    >
    > Hardware Environment:
    > Acer Travelmate 240 ,Intel Celeron 2.6 Ghz, lspci with 2.6.14 attached
    >
    > Description
    > I am getting an early kernel panic when I compiled the Kernel
    > 2.6.15-rc5 on my Acer Laptop. The dump is as follows. It is
    > reproducible every time on bootup.
    >
    > Uncompressing Linux... Ok, booting the kernel.
    > Unable to handle kernel NULL pointer dereference at virtual address 00000000
    > printing eip:
    > *pde = 00000000
    > Oops: 0002 [#1]
    > PREEMPT
    > Modules linked in :
    > CPU: 0
    > EIP: 0060:[<c020e494>] Not tainted VLI
    > EFLAGS: 00010292 (2.6.15-rc5)
    > EIP is at kobject_add+0x94/0xd0
    > eax: c0455d80 ebx: c0455b4c ecx: 00000000 edx: c0455b68
    > esi: ffffffea edi: c0455d88 ebp: 00000000 esp: c6e8bf4c
    > ds: 007b es: 007b ss: 0068
    > Process swapper (pid = 1 threadinfo = c6e8a00 task = c6e88a50)
    > Stack : c0455b4c ffffffea c0455d20 c020e4f2 00000000 c0455b38 c0455b4c c0455b38
    > c0455b4c c0294b12 c0455b4c c040e7c2 c03cdd36 c0455b38 00000000 00000000
    > 00000000 c0295542 00000000 c021fa65 c011d377 c0411638 00000000 c04ed0dc
    > Call Trace:
    > [<c020e4f2>] kobject_register+0x22/0x70
    > [<c0294b12>] bus_add_driver+0x52/0xc0
    > [<c0295542>] driver_register+0x32/0x40
    > [<c0214a65>] pcie_start_thread+0x15/0x60
    > [<c011d377>] printk+0x17/0x20
    > [<c04ed0dc>] pcied_init+0x1c/0xa0
    > [<c04ed055>] pci_proc_init+0x65/0x70
    > [<c04da83b>] do_init_calls+0x2b/0xc0
    > [<c01002a0>] init+0x0/0x160
    > [<c01002a0>] init+0x0/0x160
    > [<c01002d7>] init+0x37/0x160
    > [<c01013c9>] kernel_thread_helper+0x5/0xc
    > Code: 74 df 89 f8 e8 ce 02 00 00 eb d6 b8 01 00 00 00 e8 42 af f0 ff 85 ff 74 36
    > 8b 43 28 8d 53 1c 83 c0 08 89 43 1c 8b 48 04 89 50 04 <89> 11 89 4a 04 b8 01 00
    > 00 00 e8 5d af f0 ff b8 00 e0 ff ff 21
    > <0>Kernel panic - not syncing: Attempted to kill init!
    >

    Looks like this:

    list_add_tail(&kobj->entry,&kobj->kset->list);

    went oops over null pointers in kobj->kset->list.

    At a wild guess, I'd say that pcie_port_bus_register() hasn't run yet.
    -
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