Hi!
I played with rfcomm here -- I'm trying to emulate bluetooth gps using
normal pc -- and got couple of oopses.
[EMAIL PROTECTED]:~$ uname -a
Linux amd 2.6.21 #421 SMP Fri Apr 27 15:06:54 CEST 2007 i686 GNU/Linux
[EMAIL PROTECTED]:~$
Pavel
...
kjournald starting. Commit interval 5 seconds
EXT3 FS on sdc2, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
SCSI device sdb: 3920896 512-byte hdwr sectors (2007 MB)
sdb: Write Protect is off
sdb: Mode Sense: 03 00 00 00
sdb: assuming drive cache: write through
SCSI device sdb: 3920896 512-byte hdwr sectors (2007 MB)
sdb: Write Protect is off
sdb: Mode Sense: 03 00 00 00
sdb: assuming drive cache: write through
sdb: sdb1
PM: Adding info for No Bus:vcs9
PM: Adding info for No Bus:vcsa9
usb 5-1: new full speed USB device using uhci_hcd and address 3
PM: Adding info for usb:5-1
PM: Adding info for No Bus:usbdev5.3_ep00
usb 5-1: configuration #1 chosen from 1 choice
PM: Adding info for usb:5-1:1.0
PM: Adding info for No Bus:hci0
PM: Adding info for No Bus:usbdev5.3_ep81
PM: Adding info for No Bus:usbdev5.3_ep82
PM: Adding info for No Bus:usbdev5.3_ep02
PM: Adding info for usb:5-1:1.1
PM: Adding info for No Bus:usbdev5.3_ep83
PM: Adding info for No Bus:usbdev5.3_ep03
PM: Adding info for usb:5-1:1.2
PM: Adding info for No Bus:usbdev5.3_ep84
PM: Adding info for No Bus:usbdev5.3_ep04
PM: Adding info for usb:5-1:1.3
PM: Adding info for No Bus:usbdev5.3
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl000A840045E3
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl000A840045E3
PM: Adding info for bluetooth:acl000C76AB309B
PM: Removing info for bluetooth:acl0001E34C01FC
hci_acldata_packet: hci0 ACL packet for unknown connection handle 13
hci_acldata_packet: hci0 ACL packet for unknown connection handle 13
hci_acldata_packet: hci0 ACL packet for unknown connection handle 13
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl000C76AB309B
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl000C76AB309B
hci_acldata_packet: hci0 ACL packet for unknown connection handle 12
hci_acldata_packet: hci0 ACL packet for unknown connection handle 12
hci_acldata_packet: hci0 ACL packet for unknown connection handle 12
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl000C76AB309B
PM: Adding info for bluetooth:acl000A840045E3
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl000A840045E3
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl0001E34C01FC
PM: Removing info for bluetooth:acl0001E34C01FC
PM: Adding info for bluetooth:acl000C76AB309B
PM: Adding info for No Bus:rfcomm0
PM: Removing info for No Bus:rfcomm0
PM: Removing info for bluetooth:acl000C76AB309B
PM: Adding info for bluetooth:acl000C76AB309B
PM: Adding info for No Bus:rfcomm0
PM: Removing info for No Bus:rfcomm0
PM: Removing info for bluetooth:acl000C76AB309B
PM: Adding info for bluetooth:acl000C76AB309B
PM: Adding info for No Bus:rfcomm0
PM: Removing info for No Bus:rfcomm0
PM: Removing info for bluetooth:acl000C76AB309B
PM: Adding info for bluetooth:acl000C76AB309B
PM: Adding info for No Bus:rfcomm0
PM: Removing info for No Bus:rfcomm0
PM: Removing info for bluetooth:acl000C76AB309B
PM: Adding info for bluetooth:acl000C76AB309B
PM: Adding info for No Bus:rfcomm0
PM: Removing info for bluetooth:acl000C76AB309B
PM: Adding info for bluetooth:acl000C76AB309B
kobject_add failed for rfcomm0 with -EEXIST, don't try to register things with
the same name in the same directory.
[<c02547c1>] kobject_shadow_add+0x171/0x1d0
[<c032c697>] device_add+0xc7/0x6e0
[<c02543af>] kobject_get+0xf/0x20
[<c0254b1f>] kobject_init+0x2f/0x50
[<c032cd49>] device_create+0x89/0xc0
[<c02db26b>] tty_register_device+0x5b/0xf0
[<c0614c3f>] rfcomm_dev_ioctl+0x43f/0x5e0
[<c0612dc9>] rfcomm_sock_ioctl+0x29/0x50
[<c0556f2f>] sock_ioctl+0xaf/0x1d0
[<c0556e80>] sock_ioctl+0x0/0x1d0
[<c017d4eb>] do_ioctl+0x2b/0xa0
[<c017d5bc>] vfs_ioctl+0x5c/0x2e0
[<c017d87d>] sys_ioctl+0x3d/0x70
[<c0104050>] syscall_call+0x7/0xb
[<c0630000>] ieee80211_translate_scan+0x2f0/0xa90
=======================
BUG: unable to handle kernel NULL pointer dereference at virtual address
0000007f
printing eip:
c02552d6
*pde = 00000000
BUG: soft lockup detected on CPU#1!
[<c0150029>] softlockup_tick+0xa9/0xd0
[<c0131f73>] update_process_times+0x33/0x80
[<c01431a2>] tick_periodic+0x22/0x70
[<c0143207>] tick_handle_periodic+0x17/0x80
[<c011b95f>] smp_apic_timer_interrupt+0x4f/0x90
[<c0104aa8>] apic_timer_interrupt+0x28/0x30
[<c0258bc4>] delay_tsc+0x14/0x20
[<c0258c06>] __delay+0x6/0x10
[<c0120ebb>] do_page_fault+0x35b/0x600
[<c0120b60>] do_page_fault+0x0/0x600
[<c063840c>] error_code+0x7c/0x84
[<c02552d6>] kref_get+0x6/0x50
[<c06380c8>] _read_lock_bh+0x8/0x20
[<c0608762>] hci_get_route+0x112/0x120
[<c02543af>] kobject_get+0xf/0x20
[<c032b94e>] get_device+0xe/0x20
[<c032be5f>] device_move+0x1f/0x110
[<c061462f>] rfcomm_tty_open+0x20f/0x240
[<c0124eb0>] default_wake_function+0x0/0x10
[<c02df02b>] tty_open+0x14b/0x2c0
[<c01748ed>] chrdev_open+0xad/0x1a0
[<c0174840>] chrdev_open+0x0/0x1a0
[<c0171438>] __dentry_open+0xb8/0x1d0
[<c0171605>] nameidata_to_filp+0x35/0x40
[<c017165b>] do_filp_open+0x4b/0x60
[<c016d91e>] cache_alloc_debugcheck_after+0x3e/0x150
[<c0170ff2>] get_unused_fd+0x52/0xc0
[<c01716ba>] do_sys_open+0x4a/0xe0
[<c017178c>] sys_open+0x1c/0x20
[<c0104050>] syscall_call+0x7/0xb
=======================
BUG: soft lockup detected on CPU#0!
[<c0150029>] softlockup_tick+0xa9/0xd0
[<c0131f73>] update_process_times+0x33/0x80
[<c01431a2>] tick_periodic+0x22/0x70
[<c0143207>] tick_handle_periodic+0x17/0x80
[<c01437ea>] tick_do_broadcast+0x6a/0x80
[<c014381c>] tick_do_periodic_broadcast+0x1c/0x30
[<c014384b>] tick_handle_periodic_broadcast+0x1b/0x60
[<c01077cc>] timer_interrupt+0x2c/0x40
[<c0150255>] handle_IRQ_event+0x25/0x60
[<c0151fd7>] handle_edge_irq+0xe7/0x130
[<c0106adb>] do_IRQ+0x3b/0x80
[<c01049eb>] common_interrupt+0x23/0x28
[<c063834e>] lock_kernel+0x1e/0x30
[<c02dd08b>] tty_write+0x11b/0x1f0
[<c02dfd90>] write_chan+0x0/0x320
[<c0171c0c>] do_loop_readv_writev+0x6c/0x80
[<c0172830>] do_readv_writev+0x170/0x180
[<c02dcf70>] tty_write+0x0/0x1f0
[<c01327c4>] do_gettimeofday+0x44/0x120
[<c017287c>] vfs_writev+0x3c/0x60
[<c01728e1>] sys_writev+0x41/0x70
[<c0104050>] syscall_call+0x7/0xb
=======================
Oops: 0000 [#1]
SMP
Modules linked in:
CPU: 1
EIP: 0060:[<c02552d6>] Not tainted VLI
EFLAGS: 00010286 (2.6.21 #421)
EIP is at kref_get+0x6/0x50
eax: 0000007f ebx: 0000007f ecx: f7b779c4 edx: 00000000
esi: f7ae8598 edi: e16abd58 ebp: ffffffea esp: dfd8fe3c
ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
Process rfcomm (pid: 3595, ti=dfd8e000 task=cc00b5b0 task.ti=dfd8e000)
Stack: c06380c8 e16abd24 c0608762 f7b779c4 00000067 c02543af e16abd24 c032b94e
c032be5f 00000000 e16abd24 f7ae851e e16abd58 f7ae8508 c061462f 00000001
f7b77ad8 e16abd52 e16abd4c 00000000 f7b77ad8 f7b779c4 00000000 cc00b5b0
Call Trace:
[<c06380c8>] _read_lock_bh+0x8/0x20
[<c0608762>] hci_get_route+0x112/0x120
[<c02543af>] kobject_get+0xf/0x20
[<c032b94e>] get_device+0xe/0x20
[<c032be5f>] device_move+0x1f/0x110
[<c061462f>] rfcomm_tty_open+0x20f/0x240
[<c0124eb0>] default_wake_function+0x0/0x10
[<c02df02b>] tty_open+0x14b/0x2c0
[<c01748ed>] chrdev_open+0xad/0x1a0
[<c0174840>] chrdev_open+0x0/0x1a0
[<c0171438>] __dentry_open+0xb8/0x1d0
[<c0171605>] nameidata_to_filp+0x35/0x40
[<c017165b>] do_filp_open+0x4b/0x60
[<c016d91e>] cache_alloc_debugcheck_after+0x3e/0x150
[<c0170ff2>] get_unused_fd+0x52/0xc0
[<c01716ba>] do_sys_open+0x4a/0xe0
[<c017178c>] sys_open+0x1c/0x20
[<c0104050>] syscall_call+0x7/0xb
=======================
Code: af 52 25 c0 e8 fc 5d 30 00 e9 23 fe ff ff 0f 0b eb fe 8d 76 00 31 c9 e9
19 fb ff ff 90 90 90 90 90 90 90 90 90 53 89 c3 83 ec 10 <8b> 00 85 c0 74 08 f0
ff 03 83 c4 10 5b c3 b9 04 77 64 c0 ba 20
EIP: [<c02552d6>] kref_get+0x6/0x50 SS:ESP 0068:dfd8fe3c
BUG: unable to handle kernel paging request at virtual address 0008eb24
printing eip:
c02552d6
*pde = 2922d067
BUG: soft lockup detected on CPU#0!
[<c0150029>] softlockup_tick+0xa9/0xd0
[<c0131f73>] update_process_times+0x33/0x80
[<c01431a2>] tick_periodic+0x22/0x70
[<c0143207>] tick_handle_periodic+0x17/0x80
[<c01437ea>] tick_do_broadcast+0x6a/0x80
[<c014381c>] tick_do_periodic_broadcast+0x1c/0x30
[<c014384b>] tick_handle_periodic_broadcast+0x1b/0x60
[<c01077cc>] timer_interrupt+0x2c/0x40
[<c0150255>] handle_IRQ_event+0x25/0x60
[<c0151fd7>] handle_edge_irq+0xe7/0x130
[<c0106adb>] do_IRQ+0x3b/0x80
[<c01049eb>] common_interrupt+0x23/0x28
[<c063834e>] lock_kernel+0x1e/0x30
[<c02dd276>] tty_read+0x76/0xd0
[<c01723f1>] vfs_read+0xa1/0x130
[<c02dd200>] tty_read+0x0/0xd0
[<c0172d41>] sys_read+0x41/0x70
[<c0104050>] syscall_call+0x7/0xb
=======================
BUG: soft lockup detected on CPU#1!
[<c0150029>] softlockup_tick+0xa9/0xd0
[<c0131f73>] update_process_times+0x33/0x80
[<c01431a2>] tick_periodic+0x22/0x70
[<c0143207>] tick_handle_periodic+0x17/0x80
[<c011b95f>] smp_apic_timer_interrupt+0x4f/0x90
[<c0104aa8>] apic_timer_interrupt+0x28/0x30
[<c019007b>] sys_vmsplice+0x26b/0x2d0
[<c0258bc4>] delay_tsc+0x14/0x20
[<c0258c06>] __delay+0x6/0x10
[<c0120ebb>] do_page_fault+0x35b/0x600
[<c0120b60>] do_page_fault+0x0/0x600
[<c063840c>] error_code+0x7c/0x84
[<c016007b>] unmap_mapping_range+0x14b/0x280
[<c02552d6>] kref_get+0x6/0x50
[<c016d029>] poison_obj+0x29/0x60
[<c0104a18>] reschedule_interrupt+0x28/0x30
[<c02543af>] kobject_get+0xf/0x20
[<c02549f0>] kobject_move+0x30/0x130
[<c01c00d8>] update_backups+0x98/0x270
[<c032be91>] device_move+0x51/0x110
[<c0614772>] rfcomm_tty_close+0x52/0x90
[<c02de3b9>] release_dev+0x149/0x670
[<c01031db>] __switch_to+0x14b/0x190
[<c06360e4>] schedule+0x2e4/0x900
[<c016d029>] poison_obj+0x29/0x60
[<c02de8ef>] tty_release+0xf/0x20
[<c01732c1>] __fput+0x91/0x160
[<c0170747>] filp_close+0x47/0x90
[<c0125886>] __cond_resched+0x16/0x30
[<c012aef6>] put_files_struct+0x66/0xb0
[<c012bead>] do_exit+0x11d/0x7b0
[<c012c566>] do_group_exit+0x26/0x70
[<c0135ed2>] get_signal_to_deliver+0x282/0x3e0
[<c0103c3c>] do_notify_resume+0x3dc/0x6c4
[<c02db084>] tty_ldisc_deref+0x44/0x70
[<c02dd2a8>] tty_read+0xa8/0xd0
[<c02e11e0>] read_chan+0x0/0x600
[<c01723f1>] vfs_read+0xa1/0x130
[<c02dd200>] tty_read+0x0/0xd0
[<c0172d41>] sys_read+0x41/0x70
[<c01040de>] work_notifysig+0x13/0x19
=======================
*pte = 00000000
Oops: 0000 [#2]
SMP
Modules linked in:
CPU: 1
EIP: 0060:[<c02552d6>] Not tainted VLI
EFLAGS: 00010282 (2.6.21 #421)
EIP is at kref_get+0x6/0x50
eax: 0008eb24 ebx: 0008eb24 ecx: 0008eaf0 edx: 0008eb0c
esi: 00000067 edi: ffffffea ebp: 0008eb0c esp: c96dbd34
ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068
Process cat (pid: 3589, ti=c96da000 task=c224b570 task.ti=c96da000)
Stack: 0005ba4c c016d029 6b000017 c0104a18 0008eb0c c02543af 0008eb0c c02549f0
e406c2a0 ffffffea ffffffef f788007b 0000007b c01c00d8 ffffffef 00000000
e406c2a0 0008eb0c c032be91 00000067 e16abd24 f762d344 e406c2a0 cac2711c
Call Trace:
[<c016d029>] poison_obj+0x29/0x60
[<c0104a18>] reschedule_interrupt+0x28/0x30
[<c02543af>] kobject_get+0xf/0x20
[<c02549f0>] kobject_move+0x30/0x130
[<c01c00d8>] update_backups+0x98/0x270
[<c032be91>] device_move+0x51/0x110
[<c0614772>] rfcomm_tty_close+0x52/0x90
[<c02de3b9>] release_dev+0x149/0x670
[<c01031db>] __switch_to+0x14b/0x190
[<c06360e4>] schedule+0x2e4/0x900
[<c016d029>] poison_obj+0x29/0x60
[<c02de8ef>] tty_release+0xf/0x20
[<c01732c1>] __fput+0x91/0x160
[<c0170747>] filp_close+0x47/0x90
[<c0125886>] __cond_resched+0x16/0x30
[<c012aef6>] put_files_struct+0x66/0xb0
[<c012bead>] do_exit+0x11d/0x7b0
[<c012c566>] do_group_exit+0x26/0x70
[<c0135ed2>] get_signal_to_deliver+0x282/0x3e0
[<c0103c3c>] do_notify_resume+0x3dc/0x6c4
[<c02db084>] tty_ldisc_deref+0x44/0x70
[<c02dd2a8>] tty_read+0xa8/0xd0
[<c02e11e0>] read_chan+0x0/0x600
[<c01723f1>] vfs_read+0xa1/0x130
[<c02dd200>] tty_read+0x0/0xd0
[<c0172d41>] sys_read+0x41/0x70
[<c01040de>] work_notifysig+0x13/0x19
=======================
Code: af 52 25 c0 e8 fc 5d 30 00 e9 23 fe ff ff 0f 0b eb fe 8d 76 00 31 c9 e9
19 fb ff ff 90 90 90 90 90 90 90 90 90 53 89 c3 83 ec 10 <8b> 00 85 c0 74 08 f0
ff 03 83 c4 10 5b c3 b9 04 77 64 c0 ba 20
EIP: [<c02552d6>] kref_get+0x6/0x50 SS:ESP 0068:c96dbd34
Fixing recursive fault but reboot is needed!
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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