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RE: [bluetooth-dev] Bt stack hangs up when client disconnects



Could you run the oops through ksymoops, and see if you
can get anything useful out of it?

//Peter

> -----Original Message-----
> From: Juha.Nikkanen@xxxxxxx.fi">mailto:Juha.Nikkanen@xxxxxxx.fi]
> Sent: Wednesday, May 23, 2001 11:30
> To: bluetooth-dev@xxxxxxx.com
> Subject: [bluetooth-dev] Bt stack hangs up when client disconnects
> 
> 
> Hi!
> 
> I have some problems when I operate Axis OpenBt
> stack with Linux 2.2.19. Module bt.o compiles ok
> and loads ok. But for some circumstances module
> hangs up in a way that it does not function anymore.
> This can happen when client device moves out of
> radio coverage or client cycles power off.
> I'd like to know if somebody has had similar
> problems?
> 
>   Nikke
>   juha.nikkanen@xxxxxxx.fi
> 
> Following is a shortened log:
> ....
> May 22 15:18:16 foobar kernel: PPP Deflate Compression module 
> registered 
> May 22 15:18:16 foobar pppd[3025]: Cannot determine ethernet 
> address for
> proxy ARP
> May 22 15:18:16 foobar pppd[3025]: local  IP address xxx.xxx.xxx.xxx
> May 22 15:18:16 foobar pppd[3025]: remote IP address yyy.yyy.yyy.yyy
> //
> // Until this point, the connection has been
> // successfull. But then the client device
> // suddenly cycles power off and connection dies.
> // This has been happened also when client moves
> // out of radio coverage.
> //
> May 22 15:21:34 foobar pppd[3025]: Modem hangup
> May 22 15:21:34 foobar pppd[3025]: Connection terminated.
> May 22 15:21:34 foobar pppd[3025]: Connect time 3.4 minutes.
> May 22 15:21:34 foobar pppd[3025]: Sent 912 bytes, received 510 bytes.
> May 22 15:21:34 foobar kernel: BT SYS: process_event, 
> DISCONNECTION_COMPLETE
> Connection Timeout 
> May 22 15:21:34 foobar kernel: BT SYS: lp_disconnect_ind : 
> Connection handle
> 1 disconnected 
> May 22 15:21:34 foobar kernel: BT SYS: closing l2cap con (64,65) 
> May 22 15:21:34 foobar kernel: BT SYS: Baseband is down, 
> reset this RFCOMM
> session 
> May 22 15:21:34 foobar kernel: BT (driver) 
> bt_unregister_rfcomm : line 0 
> May 22 15:21:34 foobar kernel: BT (driver) Upper tty still open... 
> May 22 15:21:34 foobar kernel: BT (driver) bt_hangupline : 
> hanging up line 0
> 
> May 22 15:21:34 foobar kernel: BT (driver) bt_disconnect_ind 
> : RFCOMM dlci :
> 0 
> May 22 15:21:34 foobar kernel: BT SYS: l2cap channel (64,65) [RFCOMM]
> disconnected 
> May 22 15:21:34 foobar kernel: BT (driver) bt_flush_buffer, ignored 
> May 22 15:21:34 foobar kernel: BT (driver) bt_hangup on line 
> 0 (nothing
> done) pid 0 (swapper) 
> May 22 15:21:34 foobar kernel: BT (driver) bt_close on line 0 
> May 22 15:21:34 foobar kernel: BT (driver) Unregistering tty 
> on line 0 
> May 22 15:21:34 foobar kernel: BT (driver) bt_unregister_tty 
> invalid pid 
> May 22 15:21:34 foobar kernel:  
> May 22 15:21:34 foobar kernel: HW module contains... 
> May 22 15:21:34 foobar kernel: 10 ACL buffers at 800 bytes 
> May 22 15:21:34 foobar kernel: 0 SCO buffers at 0 bytes 
> May 22 15:21:34 foobar kernel:  
> May 22 15:21:34 foobar pppd[3025]: Exit.
> May 22 15:21:34 foobar btd: ppp child died, now restart!   
> May 22 15:21:34 foobar btd: Opening dev /dev/ttyBT0 
> May 22 15:21:34 foobar btd: Killing SDP server 
> May 22 15:21:34 foobar btd: Shutting down bluetooth stack 
> May 22 15:21:34 foobar btd: close_device
> May 22 15:21:34 foobar btd: close_device
> May 22 15:21:34 foobar kernel: BT (driver) bt_open on line 0 
> May 22 15:21:34 foobar kernel: BT (driver) Registering tty on line 0 
> May 22 15:21:34 foobar kernel: BT SYS: warning 
> :bt_register_tty : line busy
> ! 
> May 22 15:21:34 foobar kernel: BT (driver) bt_close on line 0 
> May 22 15:21:34 foobar kernel: BT (driver) Unregistering tty 
> on line 0 
> May 22 15:21:34 foobar kernel: BT (driver) bt_unregister_tty 
> invalid pid 
> May 22 15:21:34 foobar kernel: BT SYS: Shutting down bluetooth stack 
> May 22 15:21:34 foobar kernel: BT SYS: Shutting down RFCOMM 
> May 22 15:21:34 foobar kernel: BT SYS: Shutting down SDP 
> May 22 15:21:34 foobar kernel: BT SYS: Shutting down TCS 
> May 22 15:21:34 foobar kernel: BT SYS: Shutting down L2CAP 
> May 22 15:21:34 foobar kernel: BT SYS: Shutting down BTMEM 
> May 22 15:21:34 foobar kernel: BT (driver) bt_close on line 7 
> May 22 15:21:34 foobar kernel: BT (driver) Unregistering tty 
> on line 7 
> May 22 15:21:34 foobar kernel: BT (ldisc) bt_tty_ioctl cmd 0x540b 
> May 22 15:21:34 foobar kernel: BT (ldisc) bt_tty_ioctl: 
> forwarding ioctl
> 0x540b to n_tty line disc 
> May 22 15:21:34 foobar kernel: BT (ldisc) Hanging up line 0 
> //
> // Next, something fatal happens and after that
> // point bt module becomes unusable & unloadable
> // (it may not unload with command 'rmmod',
> // unloads only by rebooting).
> //
> May 22 15:21:34 foobar kernel: Unable to handle kernel NULL pointer
> dereference at virtual address 00000000 
> May 22 15:21:34 foobar kernel: current->tss.cr3 = 06027000, 
> %%cr3 = 06027000
> 
> May 22 15:21:34 foobar kernel: *pde = 00000000 
> May 22 15:21:34 foobar kernel: Oops: 0002 
> May 22 15:21:34 foobar kernel: CPU:    0 
> May 22 15:21:34 foobar kernel: EIP:    0010:[<4001b948>] 
> May 22 15:21:34 foobar kernel: EFLAGS: 00010282 
> May 22 15:21:34 foobar kernel: eax: 00000000   ebx: 00000000  
>  ecx: 4001b948
> edx: c5d4f974 
> May 22 15:21:34 foobar kernel: esi: c0297220   edi: c2ccc100  
>  ebp: 00000000
> esp: c4281ef0 
> May 22 15:21:34 foobar kernel: ds: 0018   es: 0018   ss: 0018 
> May 22 15:21:34 foobar kernel: Process btd (pid: 2784, process nr: 98,
> stackpage=c4281000) 
> May 22 15:21:34 foobar kernel: Stack: c4046f70 c7d32310 
> c2f69090 bffff9b4
> c2ccc000 c4046f70 c2ccc970 c2ccc968  
> May 22 15:21:34 foobar kernel:        c2ccc000 00000000 
> 00000000 00000001
> 00000000 0000540b c4046f70 00000000  
> May 22 15:21:34 foobar kernel:        c2f69090 bffff9b4 
> c7d32380 c7d32310
> c7d32380 c7d32310 c4046f70 0000540b  
> May 22 15:21:34 foobar kernel: Call Trace: [tty_release+9/16] 
> [__fput+31/72]
> [fput+23/68] [filp_close+79/88] [sys_close+91/104] [system_call+52/56]
> [_stext+43/285]  
> May 22 15:21:34 foobar kernel: Code: 00 00 00 00 00 00 00 00 
> 00 00 00 00 00
> 00 00 00 00 00 00 00  
> May 22 15:30:00 foobar kernel: PPP: ppp line discipline successfully
> unregistered 
> May 22 15:30:01 foobar kernel: hdc: ATAPI 40X CD-ROM drive, 
> 120kB Cache 
> May 22 15:37:38 foobar btd: Shutting down bluetooth stack 
> May 22 15:37:49 foobar btd: Initiating signal handler 
> May 22 15:37:49 foobar btd: Starting SDP server [sdp_server] 
> May 22 15:37:49 foobar btd: sdp_server not found
> May 22 15:37:49 foobar btd: Opening dev /dev/ttyS0 
> May 22 15:37:49 foobar btd: Killing SDP server 
> May 22 15:37:49 foobar btd: Shutting down bluetooth stack 
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