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    SubjectUSB OOPS 2.6.25-rc2-git1
    Got this on a serial console today, using 2.6.25-rc2-git1. Machine was 
    not doing anything interesting at the time, but has its / and kernel on
    a usb-storage device (usb pen drive).

    Intel ICH8R chipset (and USB controller), running x86_64 kernel. I'll
    post .config and some additional info when I get home later if it isn't
    obvious what broke.

    > BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
    > IP: [<ffffffff88063d11>] :ehci_hcd:end_unlink_async+0x17/0xfa
    > PGD 7f299067 PUD 7db7c067 PMD 0
    > Oops: 0000 [1] SMP
    > CPU 0
    > Modules linked in: ac battery raid456 async_xor async_memcpy async_tx xor raid1 md_mod xfs loop evdev rtc pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support i2c_core button intel_agp e1000e dm_mirror dm_snapshot dm_mod ata_generic pata_acpi pata_jmicron ahci sata_sil24 libata uhci_hcd thermal processor fan scsi_wait_scan sd_mod usb_storage scsi_mod libusual ehci_hcd ohci_hcd usbcore ext3 jbd mbcache ext2
    > Pid: 0, comm: swapper Not tainted 2.6.25-rc2-git1 #1
    > RIP: 0010:[<ffffffff88063d11>] [<ffffffff88063d11>] :ehci_hcd:end_unlink_async+0x17/0xfa
    > RSP: 0018:ffffffff80501ec8 EFLAGS: 00010092
    > RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8045f390
    > RDX: 0000000000000017 RSI: ffff81007dd03800 RDI: ffff81007dd03a70
    > RBP: ffff81007dd03960 R08: ffffffff8020a166 R09: ffff81007dcf3c10
    > R10: ffffffff804a3f58 R11: 000000007dd70240 R12: 0000000000000000
    > R13: 0000000000000017 R14: ffff81007dd03800 R15: 0000000000000020
    > FS: 0000000000000000(0000) GS:ffffffff80489000(0000) knlGS:0000000000000000
    > CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
    > CR2: 0000000000000080 CR3: 000000007fb98000 CR4: 00000000000006e0
    > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    > Process swapper (pid: 0, threadinfo ffffffff804a2000, task ffffffff8045f390)
    > Stack: 000000000000a028 ffff81007dd03960 0000000000000000 ffffffff88067b06
    > ffffffff80489510 ffff81007dd03800 0000000000000000 0000000000000000
    > 0000000000000017 ffffffff804cd720 0000000000000000 ffffffff880416ba
    > Call Trace:
    > <IRQ> [<ffffffff88067b06>] ? :ehci_hcd:ehci_irq+0x65/0x169
    > [<ffffffff880416ba>] ? :usbcore:usb_hcd_irq+0x23/0x51
    > [<ffffffff80257b2c>] ? handle_IRQ_event+0x25/0x53
    > [<ffffffff8020a166>] ? default_idle+0x0/0x55
    > [<ffffffff80258f4f>] ? handle_fasteoi_irq+0x90/0xc8
    > [<ffffffff8020a166>] ? default_idle+0x0/0x55
    > [<ffffffff8020e340>] ? do_IRQ+0x6c/0xd4
    > [<ffffffff8020a2b2>] ? mwait_idle+0x0/0x42
    > [<ffffffff8020b5b1>] ? ret_from_intr+0x0/0xa
    > <EOI> [<ffffffff8020a2ee>] ? mwait_idle+0x3c/0x42
    > [<ffffffff8020a24d>] ? cpu_idle+0x92/0xb8
    >
    >
    > Code: 1a f6 ff ff 89 c2 41 5b 5b 5b 5d 41 5c 41 5d 41 5e 89 d0 c3 41 54 55 48 89 fd 53 48 8b 5f 28 48 8d bf 10 01 00 00 e8 5f 40 1d f8 <8b> 83 80 00 00 00 c6 83 88 00 00 00 03 48 c7 43 50 00 00 00 00
    > RIP [<ffffffff88063d11>] :ehci_hcd:end_unlink_async+0x17/0xfa
    > RSP <ffffffff80501ec8>
    > CR2: 0000000000000080
    > ---[ end trace 742c4d07c499608e ]---
    > Kernel panic - not syncing: Aiee, killing interrupt handler!


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