On 09/20/2010 08:42 AM, Jiri Kosina wrote: > On Mon, 20 Sep 2010, Guillaume Chazarain wrote: > >>> The USB mouse I use with my laptop is causing a BUG when inserted. It works at that >>> point, but if removed and re-inserted, it is ignored. Also, after the 2nd insert, >>> other USB devices (like my thumb drive) are also ignored. >>> >>> [ 37.450777] BUG: unable to handle kernel NULL pointer dereference at (null) >>> [ 37.451148] IP: [<ffffffff817d0991>] hiddev_open+0xc1/0x220 >>> [ 37.452036] PGD 1131a0067 PUD 113036067 PMD 0 >>> [ 37.452924] Oops: 0000 [#1] PREEMPT SMP >>> [ 37.453336] last sysfs file: /sys/devices/platform/toshiba_acpi/backlight/toshiba/max_brightness >>> [ 37.453336] CPU 1 >>> [ 37.453336] Modules linked in: tpm_infineon iwlagn iwlcore tifm_7xx1 tpm_tis toshiba_bluetooth toshiba_acpi tifm_core pcmcia sdhci_pci yenta_socket sdhci [last unloaded: scsi_wait_scan] >>> [ 37.453336] >>> [ 37.453336] Pid: 3117, comm: hald-probe-hidd Not tainted 2.6.36-rc4-00166-g151b6a5 #28 Portable PC/TECRA A9 >>> [ 37.453336] RIP: 0010:[<ffffffff817d0991>] [<ffffffff817d0991>] hiddev_open+0xc1/0x220 > > Could please those of you who are able to reproduce the problem (from a > quick test seems that I am not) use 'addr2line' utility to convert the RIP > value (ffffffff817d0991 in this case) to the line number inside of > hiddev_open(), so that we can see whether it's something behind > usbhid_find_interface() causing NULL pointer dereference, or whether it is > intfdata being NULL and thus going to hid->hiddev faults? I couldn't quickly figure out how to recover the uncompressed kernel from the vmlinuz (lzma) short of recompiling. Here's the relevant section of System.map if that's of any use.... # grep 'ffffffff817d0' /boot/System.map-2.6.36-rc4-00166-g151b6a5 ffffffff817d0190 T usbhid_lookup_quirk ffffffff817d02e0 T usbhid_quirks_exit ffffffff817d0380 T usbhid_quirks_init ffffffff817d05e0 t hiddev_lookup_report ffffffff817d0690 t hiddev_write ffffffff817d06b0 t hiddev_poll ffffffff817d0720 t hiddev_usbd_probe ffffffff817d0730 T hiddev_exit ffffffff817d0750 T hiddev_disconnect ffffffff817d07e0 t hiddev_fasync ffffffff817d0800 t hiddev_release ffffffff817d08d0 t hiddev_open ffffffff817d0af0 t hiddev_ioctl_string ffffffff817d0c70 t hiddev_ioctl_usage If there's a tool to expand vmlinuz => vmlinux, I love to hear about it. If you need me to recompile to get what you need, I can do that. > (sticking two printk()s in there should do the same as well). If you give me a patch with exactly the debug stuff you want, I can compile that instead. Unfortunately, I have some work to do later today that I have to boot this box into Windows for (CADD), so my compiling and testing window is narrow (until tomorrow). Phil -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
