[ +CC: media list ] On Wed, May 31, 2017 at 08:25:42PM +0200, Sebastian wrote: > Hi list, > > as kindly suggested by gregkh > (https://bugzilla.kernel.org/show_bug.cgi?id=195943), I am now sending > the mail to this mailing list. > I have set up the latest Ubuntu 17.04 server within a qemu/kvm virtual > machine and experienced the following bug in the mce_usb driver: What is the lsusb -v output for your device? And have you successfully used this device with this driver before? > [ 2873.734554] usb usb1-port1: unable to enumerate USB device > [ 2906.929123] BUG: unable to handle kernel NULL pointer dereference > at 0000000000000003 > [ 2906.931178] IP: mce_request_packet+0x66/0x210 [mceusb] > [ 2906.932512] PGD 0 > [ 2906.932514] > [ 2906.933561] Oops: 0000 [#1] SMP > [ 2906.934382] Modules linked in: kaweth zd1211rw ir_rc6_decoder > ir_lirc_codec lirc_dev rc_rc6_mce mceusb rc_core ftdi_sio usbserial > usb_storage usbhid hid at > 76c50x_usb mac80211 cfg80211 ppdev joydev input_leds i2c_piix4 > parport_pc parport pvpanic mac_hid serio_raw ib_iser rdma_cm iw_cm > ib_cm ib_core configfs iscsi > _tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables > autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq > async_xor async_tx xor > raid6_pq libcrc32c raid1 raid0 multipath linear cirrus ttm > drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse > drm e1000 floppy pata_acpi > [ 2906.950961] CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted > 4.10.0-19-generic #21-Ubuntu Can you reproduce this with a more recent mainline kernel (e.g. 4.11.3)? This looks like something which could happen if the device is lacking an OUT endpoint, and a sanity check to catch that recently went in (and was backported to the non-EOL stable trees). Thanks, Johan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
