Hi,
*Sorry I forgot to turn HTML off in my previous message. Resending it again.
I have a Bluedio T+3 Bluetooth Headset that contains the HSP/HFP, A2DP and AVRCP profiles.
I am using kernel version 4.1.27 with BlueZ 5.40.
I have paired with the headset using bluetoothctl. After I have paired with the device, I receive kernel oops message in the console. Nonetheless, the system does not crash and I was able to configure it to play audio. Hence, it is a soft kernel panic. There are no issues to the Bluetooth audio streaming.
The steps that I have taken are as follows:
$ pulseaudio -D
$ bluetoothctl
$ scan on ??????????? (search for Bluetooth addresses)
$ pair <BT_HEADSET_MAC>
$ connect <BT_HEADSET_MAC>? (from this point on, the kernel displays kernel oops messages)
Please see the output as follows:
Kernel oops message (notice the segfault):
[ 1611.091465] pulseaudio[1270]: segfault at 694be0 ip 0000000000694be0 sp 00007ffe1b0b0158 error 15
[ 1627.873788] input: 16:01:14:24:15:59 as /devices/virtual/input/input9
[ 1627.892687] ------------[ cut here ]------------
[ 1627.899990] WARNING: CPU: 3 PID: 438 at /home/ilab/development/yocto_build/build/tmp/work-shared/intel-corei7-64-cavs-hda/kernel-source/lib/debugobjects.c:263 debug_print_object+0x89/0xb0()
[ 1627.921000] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: stub_timer+0x0/0x20
[ 1627.934530] Modules linked in: uinput 8021q cmac ecb rfcomm bnep snd_hda_codec_hdmi fuse btusb btbcm btintel bluetooth hid_sensor_gyro_3d hid_sensor_als hid_sensor_accel_3d hid_sensor_press hid_sensor_incl_3d hid_sensor_trigger hid_sensor_iio_common hid_sensor_custom hid_sensor_hub mei_dal intel_spi_platform intel_spi sbi_apl intel_ishtp_hid mwifiex_usb mwifiex_pcie mwifiex cfg80211 i915 iTCO_wdt igb pcspkr iTCO_vendor_support lpc_ich spi_pxa2xx_platform mei_me mei portmux_intel_drcfg i2c_i801 snd_hda_intel snd_hda_codec dca snd_hda_core intel_ish_ipc intel_ishtp thermal tpm_crb tpm_tis tpm intel_pmc_ipc rtc_cmos
[ 1628.002994] CPU: 3 PID: 438 Comm: kworker/u9:11 Tainted: G???? U? W?????? 4.1.27apollolake #2
[ 1628.015045] Hardware name: Intel Corp. Broxton P/NOTEBOOK, BIOS APLIRVPA.X64.0138.B35.1608091058 08/09/2016
[ 1628.028488] Workqueue: hci0 hci_rx_work [bluetooth]
[ 1628.036435]? 0000000000000086 00000000f240fc38 ffff880004bdf828 ffffffff81a738a5
[ 1628.047265]? ffff880004bdf880 ffffffff81f2e1a8 ffff880004bdf868 ffffffff81081e0a
[ 1628.058104]? 0000000000000096 ffff880004bdf928 ffffffff82241280 ffffffff81f2d1cb
[ 1628.068989] Call Trace:
[ 1628.074303]? [<ffffffff81a738a5>] dump_stack+0x4d/0x63
[ 1628.082616]? [<ffffffff81081e0a>] warn_slowpath_common+0x8a/0xc0
[ 1628.091874]? [<ffffffff81081e95>] warn_slowpath_fmt+0x55/0x70
[ 1628.100863]? [<ffffffff810f39ab>] ? init_timer_key+0x6b/0xd0
[ 1628.109753]? [<ffffffff814bf8d9>] debug_print_object+0x89/0xb0
[ 1628.118864]? [<ffffffff810f3850>] ? ftrace_raw_event_tick_stop+0x100/0x100
[ 1628.129118]? [<ffffffff814c0934>] debug_object_assert_init+0x144/0x150
[ 1628.138971]? [<ffffffff810f4003>] del_timer+0x33/0xa0
[ 1628.147195]? [<ffffffff8109bb89>] try_to_grab_pending+0xa9/0x160
[ 1628.156456]? [<ffffffff8109c3e3>] cancel_delayed_work+0x33/0xe0
[ 1628.165573]? [<ffffffffa059b24c>] l2cap_chan_del+0x19c/0x340 [bluetooth]
[ 1628.175541]? [<ffffffffa059b59d>] l2cap_connect_create_rsp+0x1ad/0x290 [bluetooth]
[ 1628.186471]? [<ffffffffa05a4190>] ? l2cap_sig_channel+0x70/0x1390 [bluetooth]
[ 1628.196942]? [<ffffffffa05a474c>] l2cap_sig_channel+0x62c/0x1390 [bluetooth]
[ 1628.207340]? [<ffffffffa056ef78>] ? hci_rx_work+0x148/0x4a0 [bluetooth]
[ 1628.217221]? [<ffffffffa05a5703>] l2cap_recv_frame+0x253/0x370 [bluetooth]
[ 1628.227420]? [<ffffffffa05a646b>] l2cap_recv_acldata+0x33b/0x380 [bluetooth]
[ 1628.237754]? [<ffffffffa056f01e>] hci_rx_work+0x1ee/0x4a0 [bluetooth]
[ 1628.247402]? [<ffffffffa056ef62>] ? hci_rx_work+0x132/0x4a0 [bluetooth]
[ 1628.257264]? [<ffffffff8109c957>] process_one_work+0x217/0x5c0
[ 1628.266265]? [<ffffffff8109c8b9>] ? process_one_work+0x179/0x5c0
[ 1628.275441]? [<ffffffff8109cdc7>] ? worker_thread+0xc7/0x460
[ 1628.284241]? [<ffffffff8109cd4b>] worker_thread+0x4b/0x460
[ 1628.292847]? [<ffffffff8109cd00>] ? process_one_work+0x5c0/0x5c0
[ 1628.301998]? [<ffffffff810a27d9>] kthread+0xf9/0x110
[ 1628.310049]? [<ffffffff810b50b5>] ? local_clock+0x25/0x30
[ 1628.318542]? [<ffffffff810a26e0>] ? kthread_create_on_node+0x250/0x250
[ 1628.328315]? [<ffffffff81a7d0e2>] ret_from_fork+0x42/0x70
[ 1628.336806]? [<ffffffff810a26e0>] ? kthread_create_on_node+0x250/0x250
[ 1628.346605] ---[ end trace 0b6559d32b2a5c31 ]---
[ 1628.354291] ------------[ cut here ]------------
[ 1628.361929] WARNING: CPU: 3 PID: 438 at /home/ilab/development/yocto_build/build/tmp/work-shared/intel-corei7-64-cavs-hda/kernel-source/lib/debugobjects.c:263 debug_print_object+0x89/0xb0()
[ 1628.383395] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: stub_timer+0x0/0x20
[ 1628.397426] Modules linked in: uinput 8021q cmac ecb rfcomm bnep snd_hda_codec_hdmi fuse btusb btbcm btintel bluetooth hid_sensor_gyro_3d hid_sensor_als hid_sensor_accel_3d hid_sensor_press hid_sensor_incl_3d hid_sensor_trigger hid_sensor_iio_common hid_sensor_custom hid_sensor_hub mei_dal intel_spi_platform intel_spi sbi_apl intel_ishtp_hid mwifiex_usb mwifiex_pcie mwifiex cfg80211 i915 iTCO_wdt igb pcspkr iTCO_vendor_support lpc_ich spi_pxa2xx_platform mei_me mei portmux_intel_drcfg i2c_i801 snd_hda_intel snd_hda_codec dca snd_hda_core intel_ish_ipc intel_ishtp thermal tpm_crb tpm_tis tpm intel_pmc_ipc rtc_cmos
[ 1628.467217] CPU: 3 PID: 438 Comm: kworker/u9:11 Tainted: G???? U? W?????? 4.1.27apollolake #2
[ 1628.479683] Hardware name: Intel Corp. Broxton P/NOTEBOOK, BIOS APLIRVPA.X64.0138.B35.1608091058 08/09/2016
[ 1628.493584] Workqueue: hci0 hci_rx_work [bluetooth]
[ 1628.502029]? 0000000000000086 00000000f240fc38 ffff880004bdf828 ffffffff81a738a5
[ 1628.513307]? ffff880004bdf880 ffffffff81f2e1a8 ffff880004bdf868 ffffffff81081e0a
[ 1628.524574]? 0000000000000096 ffff880004bdf928 ffffffff82241280 ffffffff81f2d1cb
[ 1628.535925] Call Trace:
[ 1628.541714]? [<ffffffff81a738a5>] dump_stack+0x4d/0x63
[ 1628.550492]? [<ffffffff81081e0a>] warn_slowpath_common+0x8a/0xc0
[ 1628.560242]? [<ffffffff81081e95>] warn_slowpath_fmt+0x55/0x70
[ 1628.569690]? [<ffffffff810f39ab>] ? init_timer_key+0x6b/0xd0
[ 1628.579041]? [<ffffffff814bf8d9>] debug_print_object+0x89/0xb0
[ 1628.588580]? [<ffffffff810f3850>] ? ftrace_raw_event_tick_stop+0x100/0x100
[ 1628.599315]? [<ffffffff814c0934>] debug_object_assert_init+0x144/0x150
[ 1628.609646]? [<ffffffff810f4003>] del_timer+0x33/0xa0
[ 1628.618358]? [<ffffffff8109bb89>] try_to_grab_pending+0xa9/0x160
[ 1628.628229]? [<ffffffff8109c3e3>] cancel_delayed_work+0x33/0xe0
[ 1628.637970]? [<ffffffffa059b260>] l2cap_chan_del+0x1b0/0x340 [bluetooth]
[ 1628.648624]? [<ffffffffa059b59d>] l2cap_connect_create_rsp+0x1ad/0x290 [bluetooth]
[ 1628.660266]? [<ffffffffa05a4190>] ? l2cap_sig_channel+0x70/0x1390 [bluetooth]
[ 1628.671445]? [<ffffffffa05a474c>] l2cap_sig_channel+0x62c/0x1390 [bluetooth]
[ 1628.682448]? [<ffffffffa056ef78>] ? hci_rx_work+0x148/0x4a0 [bluetooth]
[ 1628.692953]? [<ffffffffa05a5703>] l2cap_recv_frame+0x253/0x370 [bluetooth]
[ 1628.703720]? [<ffffffffa05a646b>] l2cap_recv_acldata+0x33b/0x380 [bluetooth]
[ 1628.714701]? [<ffffffffa056f01e>] hci_rx_work+0x1ee/0x4a0 [bluetooth]
[ 1628.724899]? [<ffffffffa056ef62>] ? hci_rx_work+0x132/0x4a0 [bluetooth]
[ 1628.735263]? [<ffffffff8109c957>] process_one_work+0x217/0x5c0
[ 1628.744690]? [<ffffffff8109c8b9>] ? process_one_work+0x179/0x5c0
[ 1628.754238]? [<ffffffff8109cdc7>] ? worker_thread+0xc7/0x460
[ 1628.763319]? [<ffffffff8109cd4b>] worker_thread+0x4b/0x460
[ 1628.772118]? [<ffffffff8109cd00>] ? process_one_work+0x5c0/0x5c0
[ 1628.781388]? [<ffffffff810a27d9>] kthread+0xf9/0x110
[ 1628.789423]? [<ffffffff810b50b5>] ? local_clock+0x25/0x30
[ 1628.797900]? [<ffffffff810a26e0>] ? kthread_create_on_node+0x250/0x250
[ 1628.807628]? [<ffffffff81a7d0e2>] ret_from_fork+0x42/0x70
[ 1628.816071]? [<ffffffff810a26e0>] ? kthread_create_on_node+0x250/0x250
[ 1628.825822] ---[ end trace 0b6559d32b2a5c32 ]---
Strangely, when I tried to connect to another device i.e. Bluetooth speaker that only has A2DP, the kernel oops message did not appear.
This lead me to some findings which I found in the following link. They encounter crashing/segfault when connecting to a Samsung Gear Circle. This was the closest to my issue. The difference being is that I do not encounter any crashes in the Linux system.
http://thread.gmane.org/gmane.linux.bluez.kernel/60329
May I know how can I narrow down to find the root cause of this issue and also to prevent this from happening?
Thank you.
Best regards,
Joshua