On Sun, 8 Jul 2007, Michal Piotrowski wrote: > Hi Daniel, > > On 08/07/07, Daniel J Blueman <[EMAIL PROTECTED]> wrote: > > When plugging in a USB 2 mass-storage device which I've been seeing > > problems with, I caught a khubd oops [1]. Kernel is 2.6.22-rc7
> > [ 4771.448000] BUG: unable to handle kernel NULL pointer dereference > > at virtual address 00000000 > > [ 4771.448000] printing eip: > > [ 4771.448000] c0255cc7 > > [ 4771.448000] *pde = 00000000 > > [ 4771.448000] Oops: 0000 [#1] > > [ 4771.448000] SMP > > [ 4771.448000] Modules linked in: usb_storage ide_core libusual > > binfmt_misc nfs lockd sunrpc ipv6 sonypi ppdev acpi_cpufreq > > cpufreq_stats cpufreq_powersave cpufreq_conservative cpufreq_userspace > > cpufreq_ondemand freq_table button ac video dock container sbs battery > > af_packet sbp2 parport_pc lp parport fuse snd_hda_intel snd_pcm_oss > > snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss joydev snd_seq_midi > > snd_rawmidi snd_seq_midi_event tifm_7xx1 pcmcia snd_seq snd_timer > > snd_seq_device sky2 serio_raw tifm_core snd soundcore yenta_socket > > rsrc_nonstatic pcmcia_core psmouse iTCO_wdt iTCO_vendor_support > > snd_page_alloc shpchp pci_hotplug intel_agp agpgart evdev ext3 jbd > > mbcache sg sd_mod sr_mod cdrom ata_generic ata_piix ohci1394 ieee1394 > > libata scsi_mod ehci_hcd uhci_hcd usbcore thermal processor fan > > [ 4771.448000] CPU: 0 > > [ 4771.448000] EIP: 0060:[<c0255cc7>] Not tainted VLI > > [ 4771.448000] EFLAGS: 00010202 (2.6.22-rc7-50 #1) > > [ 4771.448000] EIP is at make_class_name+0x27/0x80 > > [ 4771.448000] eax: 00000000 ebx: ffffffff ecx: ffffffff edx: 0000000b > > [ 4771.448000] esi: f89ffca6 edi: 00000000 ebp: 00000000 esp: f7d05e5c > > [ 4771.448000] ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068 > > [ 4771.448000] Process khubd (pid: 2188, ti=f7d04000 task=c190f480 > > task.ti=f7d04000) > > [ 4771.448000] Stack: dfc9a608 dfc9a494 dfc9a600 dfc9a608 f8a12ac0 > > c0255e59 00000000 f8a12b88 > > [ 4771.448000] dfc9a600 dfc9a494 00000246 00000000 c0255ee8 > > dfc9a400 f89f9b56 dfc9a400 > > [ 4771.448000] efc26800 f89f71fb efc26830 efc26800 f89f17e5 > > efc26af8 f41ce818 f8be1100 > > [ 4771.448000] Call Trace: > > [ 4771.448000] [<c0255e59>] class_device_del+0x99/0x120 > > [ 4771.448000] [<c0255ee8>] class_device_unregister+0x8/0x10 > > [ 4771.448000] [<f89f9b56>] __scsi_remove_device+0x26/0x60 [scsi_mod] > > [ 4771.448000] [<f89f71fb>] scsi_forget_host+0x4b/0x60 [scsi_mod] > > [ 4771.448000] [<f89f17e5>] scsi_remove_host+0x55/0xe0 [scsi_mod] > > [ 4771.448000] [<f8bd2c3e>] storage_disconnect+0xe/0x20 [usb_storage] > > [ 4771.448000] [<f8a4ea24>] usb_unbind_interface+0x44/0x90 [usbcore] > > [ 4771.448000] [<c0255408>] __device_release_driver+0x68/0xa0 > > [ 4771.448000] [<c0255813>] device_release_driver+0x23/0x40 > > [ 4771.448000] [<c0254d1c>] bus_remove_device+0x5c/0x90 > > [ 4771.448000] [<c0253020>] device_del+0x160/0x260 > > [ 4771.448000] [<f8a4bf28>] usb_disable_device+0x78/0xe0 [usbcore] > > [ 4771.448000] [<f8a48285>] usb_disconnect+0x95/0x130 [usbcore] > > [ 4771.448000] [<f8a48910>] hub_thread+0x270/0xc30 [usbcore] > > [ 4771.448000] [<c012a4e6>] do_exit+0x516/0x800 > > [ 4771.448000] [<c0139b00>] autoremove_wake_function+0x0/0x40 > > [ 4771.448000] [<f8a486a0>] hub_thread+0x0/0xc30 [usbcore] > > [ 4771.448000] [<c0139834>] kthread+0x34/0x60 > > [ 4771.448000] [<c0139800>] kthread+0x0/0x60 > > [ 4771.448000] [<c0105397>] kernel_thread_helper+0x7/0x10 > > [ 4771.448000] ======================= > > [ 4771.448000] Code: 00 00 00 00 55 57 56 53 83 ec 04 31 ed 83 cb ff > > 89 c6 89 c7 89 14 24 89 d9 89 e8 f2 ae f7 d1 49 8b 04 24 89 ca 89 d9 > > 8b 38 89 e8 <f2> ae f7 d1 49 8d 44 0a 02 ba d0 00 00 00 e8 06 36 f2 ff > > 31 d2 > > [ 4771.448000] EIP: [<c0255cc7>] make_class_name+0x27/0x80 SS:ESP > > 0068:f7d05e5c Although the bug occurred in the context of the khubd process, you can see from the stack dump that the actual problem appears to lie in the driver-model core. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
