[Bluez-devel] oops when playing audio

[ilmari@ilmari.org (Dagfinn Ilmari Mannsåker)]

Hi,

I was just playing around with hstest and my new Bluetooth headset (a
Jabra BT250, to be precise) when I got this oops after a few minutes'
playback:

usb 1-1: new full speed USB device using address 3
usb 1-1: USB disconnect, address 3
__tx_submit: hci0 tx submit failed urb cff5a614 type 3 err -19
__tx_submit: hci0 tx submit failed urb cff5a614 type 3 err -19
usb 1-1: new full speed USB device using address 4
Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c021d454
*pde = 00000000
Oops: 0000 [#1]
PREEMPT 
Modules linked in: sco hci_usb af_packet prism54 firmware_class nfs lockd sunrpc rfcomm l2cap bluetooth md5 ipv6 smsc_ircc2 ds iptable_nat ipt_state ip_conntrack iptable_mangle iptable_filter ip_tables e100 mii snd_maestro3 snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_timer snd soundcore uhci_hcd usbcore yenta_socket pcmcia_core intel_agp agpgart ircomm_tty ircomm irda ide_cd cdrom mousedev joydev evdev psmouse apm i8k unix
CPU:    0
EIP:    0060:[<c021d454>]    Not tainted VLI
EFLAGS: 00210287   (2.6.7-rc3-mm1) 
EIP is at skb_release_data+0x34/0xa0
eax: cffc7cd8   ebx: 00000000   ecx: cffc7cd8   edx: 00000000
esi: c1d26560   edi: cbc9af38   ebp: cc9c57c0   esp: cbc9ae64
ds: 007b   es: 007b   ss: 0068
Process hstest (pid: 1437, threadinfo=cbc9a000 task=cf80f830)
Stack: c1d26560 00000030 c021d4c8 00000000 c021d56c c1d26560 c1d26560 00000030 
       c1d26560 c1d26560 d09d252e 00000030 00000000 00000000 d09fe660 cbc9aed8 
       00000800 c0219f40 00000800 00000000 bfffee30 00000000 00000000 00000000 
Call Trace:
 [<c021d4c8>] kfree_skbmem+0x8/0x20
 [<c021d56c>] __kfree_skb+0x8c/0x120
 [<d09d252e>] bt_sock_recvmsg+0x7e/0xb0 [bluetooth]
 [<c0219f40>] sock_aio_read+0xb0/0xd0
 [<c014e7ed>] do_sync_read+0x6d/0xb0
 [<c016007d>] sys_select+0x24d/0x4b0
 [<c014e917>] vfs_read+0xe7/0x110
 [<c014eb38>] sys_read+0x38/0x60
 [<c0103ef9>] sysenter_past_esp+0x52/0x71

Code: 0f 8b 80 a8 00 00 00 ff 08 0f 94 c2 84 d2 74 7a 8b 8e a8 00 00 00 8b 51 04 89 c8 85 d2 74 38 31 db 39 d3 73 32 89 f6 8b 54 d8 10 <8b> 02 f6 c4 08 75 17 8b 42 04 40 74 48 83 42 04 ff 0f 98 c0 84 
 <3>hci_scodata_packet: hci0 SCO packet for unknown connection handle 43
hci_scodata_packet: hci0 SCO packet for unknown connection handle 43

hsplay segfaulted, but I was able to start playing again afterwards.
Also, the kernel disconnects and reconnects the device spontaneously
every once in a while while playing (both before and after the oops),
like this:

Jun 13 06:13:22 galadriel kernel: usb 1-1: new full speed USB device using address 5
Jun 13 06:15:19 galadriel kernel: usb 1-1: USB disconnect, address 5
Jun 13 06:15:20 galadriel kernel: usb 1-1: new full speed USB device using address 6
Jun 13 06:15:57 galadriel kernel: usb 1-1: USB disconnect, address 6
Jun 13 06:15:57 galadriel kernel: usb 1-1: new full speed USB device using address 7

I'm running 2.6.7-rc3-mm1 on a Dell Inspiron 4000 (P-III 800Mhz) and
using an MSI USB Bluetooth dongle. The relevant .config snippet is:


CONFIG_BT=m
CONFIG_BT_L2CAP=m
CONFIG_BT_SCO=m
CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y
CONFIG_BT_BNEP=m
CONFIG_BT_BNEP_MC_FILTER=y
CONFIG_BT_BNEP_PROTO_FILTER=y
#
# Bluetooth device drivers
#
CONFIG_BT_HCIUSB=m
CONFIG_BT_HCIUSB_SCO=y
# CONFIG_BT_HCIUART is not set
CONFIG_BT_HCIBCM203X=m
CONFIG_BT_HCIBFUSB=m
# CONFIG_BT_HCIDTL1 is not set
# CONFIG_BT_HCIBT3C is not set
# CONFIG_BT_HCIBLUECARD is not set
# CONFIG_BT_HCIBTUART is not set
# CONFIG_BT_HCIVHCI is not set

-- 
ilmari



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