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    SubjectOOPS: USB and/or devicefs
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    I'm not sure what caused this exactly -- I unplugged a USB hub and then
    did a ls in the hub's directory in the devicefs. The ls died (in D
    state), and I found this in my logs.

    ksymoops 2.4.4 on i586 2.5.31. Options used
    -V (default)
    -k /proc/ksyms (default)
    -l /proc/modules (default)
    -o /lib/modules/2.5.31/ (default)
    -m /boot/System.map-2.5.31 (default)

    Warning: You did not tell me where to find symbol information. I will
    assume that the log matches the kernel and modules that are running
    right now and I'll use the default options above for symbol resolution.
    If the current kernel and/or modules do not match the log, you can get
    more accurate output by telling me the kernel version and where to find
    map, modules, ksyms etc. ksymoops -h explains the options.

    Aug 25 02:44:59 entropy kernel: Unable to handle kernel NULL pointer dereference at virtual address 0000005c
    Aug 25 02:44:59 entropy kernel: c015b40f
    Aug 25 02:44:59 entropy kernel: *pde = 00000000
    Aug 25 02:44:59 entropy kernel: Oops: 0002
    Aug 25 02:44:59 entropy kernel: CPU: 0
    Aug 25 02:44:59 entropy kernel: EIP: 0060:[<c015b40f>] Not tainted
    Using defaults from ksymoops -t elf32-i386 -a i386
    Aug 25 02:44:59 entropy kernel: EFLAGS: 00010206
    Aug 25 02:44:59 entropy kernel: eax: c49537d4 ebx: 0000005c ecx: 0000005c edx: 00000000
    Aug 25 02:44:59 entropy kernel: esi: c39c2688 edi: 00000000 ebp: c056dd48 esp: c4841ef4
    Aug 25 02:44:59 entropy kernel: ds: 0068 es: 0068 ss: 0068
    Aug 25 02:44:59 entropy kernel: Stack: c39c2688 c056de28 c056dd20 c015bbff c49537d4 c39c2688 c33eb0d0 c33eb210
    Aug 25 02:44:59 entropy kernel: ffffffff c33eb000 c016d910 c33eb168 c33eb0d0 c33eb0d0 c33eb000 c581616a
    Aug 25 02:44:59 entropy kernel: c33eb0d0 c33eb000 000000d8 00000100 c3b27400 00000002 00000001 c5817edf
    Aug 25 02:44:59 entropy kernel: Call Trace: [<c015bbff>] [<c016d910>] [<c581616a>] [<c5817edf>] [<c58181df>]
    Aug 25 02:44:59 entropy kernel: [<c58233ee>] [<c5818360>] [<c581838b>] [<c5818360>] [<c0110820>] [<c01055a5>]
    Aug 25 02:44:59 entropy kernel: Code: ff 4f 5c 0f 88 39 08 00 00 8b 46 08 66 ff 48 24 56 e8 fb ab

    >>EIP; c015b40f <driverfs_unlink+f/40> <=====
    Trace; c015bbff <driverfs_remove_dir+4f/a1>
    Trace; c016d910 <put_device+80/b0>
    Trace; c581616a <[usbcore]usb_disconnect+ea/110>
    Trace; c5817edf <[usbcore]usb_hub_port_connect_change+4f/250>
    Trace; c58181df <[usbcore]usb_hub_events+ff/280>
    Trace; c58233ee <[usbcore].rodata.end+3673/8125>
    Trace; c5818360 <[usbcore]usb_hub_thread+0/e0>
    Trace; c581838b <[usbcore]usb_hub_thread+2b/e0>
    Trace; c5818360 <[usbcore]usb_hub_thread+0/e0>
    Trace; c0110820 <default_wake_function+0/40>
    Trace; c01055a5 <kernel_thread_helper+5/10>
    Code; c015b40f <driverfs_unlink+f/40>
    00000000 <_EIP>:
    Code; c015b40f <driverfs_unlink+f/40> <=====
    0: ff 4f 5c decl 0x5c(%edi) <=====
    Code; c015b412 <driverfs_unlink+12/40>
    3: 0f 88 39 08 00 00 js 842 <_EIP+0x842> c015bc51 <.text.lock.inode+0/bf>
    Code; c015b418 <driverfs_unlink+18/40>
    9: 8b 46 08 mov 0x8(%esi),%eax
    Code; c015b41b <driverfs_unlink+1b/40>
    c: 66 ff 48 24 decw 0x24(%eax)
    Code; c015b41f <driverfs_unlink+1f/40>
    10: 56 push %esi
    Code; c015b420 <driverfs_unlink+20/40>
    11: e8 fb ab 00 00 call ac11 <_EIP+0xac11> c0166020 <sys_shmctl+170/880>


    1 warning issued. Results may not be reliable.

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