Return-path: Received: from mail-wm0-f49.google.com ([74.125.82.49]:35432 "EHLO mail-wm0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966080AbcCOXmO (ORCPT ); Tue, 15 Mar 2016 19:42:14 -0400 Received: by mail-wm0-f49.google.com with SMTP id l68so169339324wml.0 for ; Tue, 15 Mar 2016 16:42:12 -0700 (PDT) To: Jes Sorensen , linux-wireless From: Xose Vazquez Perez Subject: rtl8xxxu 4.4.5(from f23): I get a panic adding a new device to the driver Message-ID: <56E89DD2.7000000@gmail.com> (sfid-20160316_004227_848113_9B68FCD4) Date: Wed, 16 Mar 2016 00:42:10 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: Hi, If I do: # echo "0bda 8176" > /sys/bus/usb/drivers/rtl8xxxu/new_id I get: ---dmesg--- usbcore: registered new interface driver rtl8xxxu BUG: unable to handle kernel NULL pointer dereference at (null) IP: [] rtl8xxxu_probe+0x810/0x22a0 [rtl8xxxu] PGD 0 Oops: 0000 [#1] SMP Modules linked in: rtl8xxxu ccm snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_pcm_oss snd_mixer_oss arc4 intel_rapl iosf_mbi x86_pkg_temp_thermal coretemp kvm_intel kvm ath9k ath9k_common ath9k_hw irqbypass ath crct10dif_pclmul i915 crc32_pclmul crc32c_intel iTCO_wdt iTCO_vendor_support mac80211 snd_hda_codec_realtek cfg80211 snd_hda_codec_generic snd_usb_audio i2c_i801 snd_hda_intel snd_hda_codec snd_hda_core snd_usbmidi_lib snd_rawmidi snd_hwdep snd_seq ses video i2c_algo_bit snd_seq_device drm_kms_helper enclosure lpc_ich drm snd_pcm rfkill snd_timer mei_me snd mei soundcore shpchp tpm_tis tpm binfmt_misc hid_logitech_hidpp hid_logitech_dj serio_raw r8169 mii fjes uas usb_storage [last unloaded: rtlwifi] CPU: 0 PID: 1233 Comm: bash Not tainted 4.4.5-300.fc23.x86_64 #1 Hardware name: Hewlett-Packard p6-2004es/2ABF, BIOS 7.16 03/23/2012 task: ffff88022d340000 ti: ffff8800b5c10000 task.ti: ffff8800b5c10000 RIP: 0010:[] [] rtl8xxxu_probe+0x810/0x22a0 [rtl8xxxu] RSP: 0018:ffff8800b5c13bc0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 000000000000006a RCX: 0000000000005a32 RDX: 0000000000005a31 RSI: 0000000000000000 RDI: ffff8802346bb4c0 RBP: ffff8800b5c13c70 R08: 000000000001a1e0 R09: ffffffff81586bbb R10: ffffea0002d65380 R11: 0000000000000000 R12: 00000000000000bf R13: 00000000000000ff R14: ffff8802346bb4c0 R15: 00000000000000be FS: 00007fe567227700(0000) GS:ffff88023f400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000b5d9a000 CR4: 00000000000406f0 Stack: ffff88022d340000 ffff8800b5c13be8 ffffffff812abf5a 00000000ffffffea 0000000000000000 ffff8800b5c13c18 0000000084b2960b ffff880232cfa090 ffff8802346ba700 ffff880233631400 ffff8802346bb53e 0000006300000246 Call Trace: [] ? kernfs_activate+0x7a/0xe0 [] usb_probe_interface+0x1bd/0x300 [] driver_probe_device+0x222/0x490 [] __driver_attach+0x84/0x90 [] ? driver_probe_device+0x490/0x490 [] bus_for_each_dev+0x6c/0xc0 [] driver_attach+0x1e/0x20 [] usb_store_new_id+0xeb/0x1c0 [] new_id_store+0x22/0x30 [] drv_attr_store+0x25/0x30 [] sysfs_kf_write+0x37/0x40 [] kernfs_fop_write+0x11d/0x170 [] __vfs_write+0x37/0x110 [] ? __fd_install+0x33/0xe0 [] ? percpu_down_read+0x12/0x50 [] vfs_write+0xa9/0x1a0 [] SyS_write+0x55/0xc0 [] entry_SYSCALL_64_fastpath+0x12/0x71 Code: 44 89 f0 4d 89 fe 41 89 c7 66 41 81 ff ff 01 0f 86 6f ff ff ff 31 d2 be cf 00 00 00 4c 89 f7 e8 07 a5 ff ff 49 8b 46 10 4c 89 f7 10 85 c0 41 89 c0 0f 85 89 03 00 00 49 8b 46 08 48 c7 c1 5b RIP [] rtl8xxxu_probe+0x810/0x22a0 [rtl8xxxu] RSP CR2: 0000000000000000 ---[ end trace 0675ed7e0a2d84ed ]--- --rtl8192cu dmesg-- rtl8192cu: Chip version 0x10 rtl8192cu: MAC address: 00:e0:4c:07:dd:45 rtl8192cu: Board Type 0 rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1 rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin ieee80211 phy1: Selected rate control algorithm 'rtl_rc' usbcore: registered new interface driver rtl8192cu --end-- --lsusb-v-- Bus 002 Device 004: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0bda Realtek Semiconductor Corp. idProduct 0x8176 RTL8188CUS 802.11n WLAN Adapter bcdDevice 2.00 iManufacturer 1 Realtek iProduct 2 802.11n WLAN Adapter iSerial 3 00e04c000001 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 46 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 4 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x84 EP 4 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0000 (Bus Powered) --end-- Thanks.