On Mon, Sep 20, 2010 at 5:10 PM, Jiri Kosina <jkosina@xxxxxxx> wrote: > > Thanks Matt and Phill for confirming the line that triggers the oops. As I > am not able to reproduce it myself, it's a bit tricky to track down what > went wrong. > > Could you please apply the patch below? It's printing the hid <-> hiddev > <-> usb_interface connections at various stages of probing and open. > Hopefully it'll reveal a little bit what goes wrong and where. > > Thanks. > [snip] > -- > Jiri Kosina > SUSE Labs, Novell Inc. > Hi Jiri, sure, you're welcome, this kernel-version (2.6.36) is one of the best releases so far in performance, stability and features so I want to use it for some time without any adverse effects or serious regressions connected to it ;) here's the information after having connected the transmitter (the previous mentioned debug-kernel with your patch added and re-compiled): [ 110.002297] hub 1-1:1.0: state 7 ports 6 chg 0000 evt 0008 [ 110.002624] hub 1-1:1.0: port 3, status 0101, change 0001, 12 Mb/s [ 110.106254] hub 1-1:1.0: debounce: port 3: total 100ms stable 100ms status 0x101 [ 110.117240] hub 1-1:1.0: port 3 not reset yet, waiting 10ms [ 110.178988] usb 1-1.3: new low speed USB device using ehci_hcd and address 5 [ 110.190934] hub 1-1:1.0: port 3 not reset yet, waiting 10ms [ 110.268859] usb 1-1.3: skipped 1 descriptor after interface [ 110.268866] usb 1-1.3: skipped 1 descriptor after interface [ 110.269288] usb 1-1.3: default language 0x0409 [ 110.271199] usb 1-1.3: udev 5, busnum 1, minor = 4 [ 110.271203] usb 1-1.3: New USB device found, idVendor=046d, idProduct=c521 [ 110.271207] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 110.271211] usb 1-1.3: Product: USB Receiver [ 110.271214] usb 1-1.3: Manufacturer: Logitech [ 110.271338] usb 1-1.3: usb_probe_device [ 110.271343] usb 1-1.3: configuration #1 chosen from 1 choice [ 110.273070] usb 1-1.3: adding 1-1.3:1.0 (config #1, interface 0) [ 110.273136] usbhid 1-1.3:1.0: usb_probe_interface [ 110.273139] usbhid 1-1.3:1.0: usb_probe_interface - got id [ 110.273148] HID debug: usbhid_probe() -- set intfdata(ffff8801bae85000, ffff8801bb0c0000) [ 110.277028] HID debug: hid_connect() -- hid: ffff8801bb0c0000 [ 110.277117] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input4 [ 110.277188] usb 1-1.3: link qh8-0e01/ffff8801bb1ce440 start 4 [1/2 us] [ 110.277274] generic-usb 0003:046D:C521.0004: input,hidraw2: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:00:1a.0-1.3/input0 [ 110.277308] usb 1-1.3: adding 1-1.3:1.1 (config #1, interface 1) [ 110.277359] usbhid 1-1.3:1.1: usb_probe_interface [ 110.277362] usbhid 1-1.3:1.1: usb_probe_interface - got id [ 110.277369] HID debug: usbhid_probe() -- set intfdata(ffff8801bae85800, ffff8801bfefc000) [ 110.283896] HID debug: hid_connect() -- hid: ffff8801bfefc000 [ 110.284022] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.1/input/input5 [ 110.284053] usb 1-1.3: link qh8-0e01/ffff8801bb1ce6c0 start 5 [1/2 us] [ 110.284106] HID debug: hiddev_connect() -- hid: ffff8801bfefc000, hiddev: ffff8801bca645c0, intf: ffff8801bae85800 [ 110.284110] drivers/usb/core/file.c: looking for a minor, starting at 0 [ 110.284164] HID debug: hid_connect() -- after hiddev_connect(), hid: ffff8801bfefc000, hiddev: ffff8801bca645c0 [ 110.284261] generic-usb 0003:046D:C521.0005: input,hiddev0,hidraw3: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:1a.0-1.3/input1 [ 110.284332] drivers/usb/core/inode.c: creating file '005' [ 110.308876] HID debug: hiddev_open(): hid: ffff8801bafb4000, hiddev: (null), intf: ffff8801bca99800 [ 110.308881] BUG: unable to handle kernel NULL pointer dereference at (null) [ 110.308883] IP: [<ffffffff815a0873>] hiddev_open+0xe3/0x1e0 [ 110.308887] PGD 0 [ 110.308888] Oops: 0000 [#1] PREEMPT SMP [ 110.308890] last sysfs file: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input4/capabilities/sw [ 110.308892] CPU 7 [ 110.308892] Modules linked in: it87 hwmon_vid hwmon e1000e firewire_ohci shpchp firewire_core i2c_i801 wmi tg3 libphy e1000 scsi_wait_scan sl811_hcd ohci_hcd ssb usb_storage ehci_hcd [ 110.308899] [ 110.308900] Pid: 5670, comm: hald-probe-hidd Not tainted 2.6.36-rc4_hiddev+ #2 FMP55/ipower G3710 [ 110.308902] RIP: 0010:[<ffffffff815a0873>] [<ffffffff815a0873>] hiddev_open+0xe3/0x1e0 [ 110.308904] RSP: 0018:ffff8801bb59fc98 EFLAGS: 00010296 [ 110.308905] RAX: 0000000000000000 RBX: 00000000ffffffed RCX: 000000000000006a [ 110.308906] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 110.308907] RBP: ffff8801bc8afcc0 R08: 0000000000000000 R09: 0000000000000000 [ 110.308908] R10: 000000000000000a R11: 0000000000000001 R12: ffff8801bbca0000 [ 110.308909] R13: ffff8801bafb4000 R14: 0000000000000000 R15: ffff8801bca99800 [ 110.308911] FS: 00007fb95dead700(0000) GS:ffff8800021c0000(0000) knlGS:0000000000000000 [ 110.308912] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 110.308913] CR2: 0000000000000000 CR3: 00000001bb361000 CR4: 00000000000006e0 [ 110.308914] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 110.308915] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 110.308916] Process hald-probe-hidd (pid: 5670, threadinfo ffff8801bb59e000, task ffff8801bb041810) [ 110.308917] Stack: [ 110.308918] 0000000000000001 ffff8801bc8afcc0 ffffffff818e2b00 ffff8801bb161608 [ 110.308920] <0> ffffffff818f24e0 00000000ffffffed 0000000000000000 ffffffff814dc885 [ 110.308922] <0> ffff8801bb161608 ffff8801bc8afcc0 ffff8801bf4d92c0 0000000000000000 [ 110.308924] Call Trace: [ 110.308928] [<ffffffff814dc885>] ? usb_open+0xf5/0x1d0 [ 110.308930] [<ffffffff810d9350>] ? chrdev_open+0x0/0x210 [ 110.308932] [<ffffffff810d9495>] ? chrdev_open+0x145/0x210 [ 110.308935] [<ffffffff810d3b40>] ? __dentry_open.clone.16+0x100/0x320 [ 110.308937] [<ffffffff810e2390>] ? do_last.clone.45+0x3f0/0x690 [ 110.308939] [<ffffffff810e2823>] ? do_filp_open+0x1f3/0x5f0 [ 110.308942] [<ffffffff8160f66c>] ? move_addr_to_user+0x4c/0x60 [ 110.308943] [<ffffffff81610142>] ? sys_getsockname+0xe2/0x100 [ 110.308946] [<ffffffff81042b89>] ? get_parent_ip+0x9/0x20 [ 110.308949] [<ffffffff8174b7e3>] ? _raw_spin_unlock+0x13/0x40 [ 110.308951] [<ffffffff810eda94>] ? alloc_fd+0xe4/0x140 [ 110.308953] [<ffffffff810d4ca6>] ? do_sys_open+0x66/0x130 [ 110.308955] [<ffffffff810026ab>] ? system_call_fastpath+0x16/0x1b [ 110.308956] Code: 24 18 c0 00 00 31 c0 4c 89 a5 c0 00 00 00 4c 89 f9 4c 89 f2 4c 89 ee 48 c7 c7 20 de a2 81 e8 99 78 1a 00 49 8b 84 24 18 c0 00 00 <83> 38 00 0f 84 b7 00 00 00 8b 50 04 8d 4a 01 85 d2 89 48 04 75 [ 110.308969] RIP [<ffffffff815a0873>] hiddev_open+0xe3/0x1e0 [ 110.308971] RSP <ffff8801bb59fc98> [ 110.308971] CR2: 0000000000000000 [ 110.308973] ---[ end trace a4574c242f54f8b3 ]--- Thanks ! 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