Re: [Bugme-new] [Bug 11088] New: Warning about NULL pointer dereference when attaching usb hd

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(switched to email.  Please respond via emailed reply-to-all, not via the
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On Tue, 15 Jul 2008 02:15:53 -0700 (PDT) bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=11088
> 
>            Summary: Warning about NULL pointer dereference when attaching
>                     usb hd
>            Product: Drivers
>            Version: 2.5
>      KernelVersion: 2.6.26
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: USB
>         AssignedTo: greg@xxxxxxxxx
>         ReportedBy: hanno@xxxxxxxxxx
> 
> 
> I got this when attaching an external usb hd. Kernel is 2.6.26, I'll attach
> config.
> 
> sd 0:0:0:0: [sda] Attached SCSI disk
> sd 0:0:0:0: Attached scsi generic sg0 type 0
> BUG: unable to handle kernel NULL pointer dereference at 00000004
> IP: [<f98c067b>] :usb_storage:slave_alloc+0x2b/0x60
> *pde = 00000000
> Oops: 0000 [#1]
> Modules linked in: radeon drm usb_storage pcmcia nsc_ircc irda parport_pc
> ehci_hcd uhci_hcd parport usbcore yenta_socket rsrc_nonstatic firewire_ohci
> pcmcia_core 8139cp firewire_core crc_itu_t ipw2200 8139too i2c_i801
> 
> Pid: 1354, comm: usb-stor-scan Not tainted (2.6.26 #1)
> EIP: 0060:[<f98c067b>] EFLAGS: 00010202 CPU: 0
> EIP is at slave_alloc+0x2b/0x60 [usb_storage]
> EAX: 00000000 EBX: f6c6070c ECX: 00000202 EDX: f6cb8c00
> ESI: f0403400 EDI: f6c10c14 EBP: f6c60400 ESP: f6d9bddc
>  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
> Process usb-stor-scan (pid: 1354, ti=f6d9a000 task=f7c534c0 task.ti=f6d9a000)
> Stack: f0403400 f6c10c00 c02f0c73 f60fc938 00000000 00000000 f6c60400 00000000
>        00000000 00000000 c02f1061 c04cca30 c049cb92 f60fc938 c04bebfe f6c643c8
>        f6c643d0 f6c643e0 00000000 00000000 c04befed f6ea0288 00000000 f6c10c00
> Call Trace:
>  [<c02f0c73>] scsi_alloc_sdev+0x143/0x1b0
>  [<c02f1061>] scsi_probe_and_add_lun+0x261/0x9a0
>  [<c02f1c03>] __scsi_scan_target+0x2e3/0x610
>  [<c0124f40>] process_timeout+0x0/0x10
>  [<c0424347>] wait_for_common+0x77/0x110
>  [<c0118ab0>] default_wake_function+0x0/0x10
>  [<c02f1f87>] scsi_scan_channel+0x57/0xa0
>  [<c02f2077>] scsi_scan_host_selected+0xa7/0x120
>  [<c02f215b>] do_scsi_scan_host+0x6b/0x70
>  [<f98c2625>] usb_stor_scan_thread+0x145/0x190 [usb_storage]
>  [<c012e6e0>] autoremove_wake_function+0x0/0x50
>  [<f98c24e0>] usb_stor_scan_thread+0x0/0x190 [usb_storage]
>  [<c012e2d7>] kthread+0x37/0x70
>  [<c012e2a0>] kthread+0x0/0x70
>  [<c0103323>] kernel_thread_helper+0x7/0x14
>  =======================
> Code: 83 ec 08 89 74 24 04 89 c6 89 1c 24 8b 18 c6 40 57 24 81 c3 0c 03 00 00
> 8b 43 20 8b 53 0c c1 e8 0f 83 e0 0f 8b 84 82 8c 01 00 00 <0f> b7 50 04 8b 46 04
> 4a e8 b8 aa 96 c6 80 7b 3c 04 75 0e 8b 46
> EIP: [<f98c067b>] slave_alloc+0x2b/0x60 [usb_storage] SS:ESP 0068:f6d9bddc
> ---[ end trace f3a5e784c4c8fadf ]---

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