Hi!
Today I was trying wireless-testing in IBSS mode.
And found this bug, I have iwl39.. built-in card and rt73usb one.
Same bug with both.
what to do:
# iwconfig wlan2 mode ad-hoc essid have-fun
# ifconfig wlan2 up
kernel log is attached. w/o mutex debug option enabled kernel hangs.
vitja.
Apr 6 13:15:43 vitja-laptop kernel: [ 184.635294] phy0: HW CONFIG: freq=2412
Apr 6 13:15:46 vitja-laptop kernel: [ 187.214766] phy0: HW CONFIG: freq=2412
Apr 6 13:15:46 vitja-laptop kernel: [ 187.214781] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:15:46 vitja-laptop kernel: [ 187.214917] sta_find_ibss:
selected 80:04:17:7a:00:81 current 00:00:00:00:00:00
Apr 6 13:15:46 vitja-laptop kernel: [ 187.214922] did not try to join ibss
Apr 6 13:15:48 vitja-laptop kernel: [ 189.212911] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:15:48 vitja-laptop kernel: [ 189.212926] sta_find_ibss:
selected 82:02:00:00:00:00 current 00:00:00:00:00:00
Apr 6 13:15:48 vitja-laptop kernel: [ 189.212931] did not try to join ibss
Apr 6 13:15:50 vitja-laptop kernel: [ 191.214194] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:15:50 vitja-laptop kernel: [ 191.214209] sta_find_ibss:
selected 82:02:00:00:00:00 current 00:00:00:00:00:00
Apr 6 13:15:50 vitja-laptop kernel: [ 191.214214] did not try to join ibss
Apr 6 13:15:50 vitja-laptop kernel: [ 191.214218] wlan0_rename:
Trigger new scan to find an IBSS to join
Apr 6 13:15:53 vitja-laptop kernel: [ 192.312380] phy0: HW CONFIG: freq=2412
Apr 6 13:15:53 vitja-laptop kernel: [ 192.312395] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:15:53 vitja-laptop kernel: [ 192.312430] sta_find_ibss:
selected 80:04:17:7a:00:81 current 00:00:00:00:00:00
Apr 6 13:15:53 vitja-laptop kernel: [ 192.312435] did not try to join ibss
Apr 6 13:15:55 vitja-laptop kernel: [ 194.314701] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:15:55 vitja-laptop kernel: [ 194.314716] sta_find_ibss:
selected 82:02:00:00:00:00 current 00:00:00:00:00:00
Apr 6 13:15:55 vitja-laptop kernel: [ 194.314720] did not try to join ibss
Apr 6 13:15:55 vitja-laptop kernel: [ 194.314724] wlan0_rename:
Trigger new scan to find an IBSS to join
Apr 6 13:15:57 vitja-laptop kernel: [ 196.838333] phy0: HW CONFIG: freq=2412
Apr 6 13:15:57 vitja-laptop kernel: [ 196.838346] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:15:57 vitja-laptop kernel: [ 196.838377] sta_find_ibss:
selected 80:04:17:7a:00:81 current 00:00:00:00:00:00
Apr 6 13:15:57 vitja-laptop kernel: [ 196.838382] did not try to join ibss
Apr 6 13:15:59 vitja-laptop kernel: [ 198.838993] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:15:59 vitja-laptop kernel: [ 198.839006] sta_find_ibss:
selected 82:02:00:00:00:00 current 00:00:00:00:00:00
Apr 6 13:15:59 vitja-laptop kernel: [ 198.839011] did not try to join ibss
Apr 6 13:15:59 vitja-laptop kernel: [ 198.839014] wlan0_rename:
Trigger new scan to find an IBSS to join
Apr 6 13:16:02 vitja-laptop kernel: [ 202.856521] phy0: HW CONFIG: freq=2412
Apr 6 13:16:02 vitja-laptop kernel: [ 202.856535] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:16:02 vitja-laptop kernel: [ 202.856575] sta_find_ibss:
selected 80:04:17:7a:00:81 current 00:00:00:00:00:00
Apr 6 13:16:02 vitja-laptop kernel: [ 202.856580] did not try to join ibss
Apr 6 13:16:02 vitja-laptop kernel: [ 202.856898] wlan0_rename:
Creating new IBSS network, BSSID 02:25:b0:b1:66:66
Apr 6 13:16:02 vitja-laptop kernel: [ 202.859134] phy0: HW CONFIG: freq=2412
Apr 6 13:16:02 vitja-laptop kernel: [ 202.859348] wlan0_rename:
Configured IBSS beacon template
Apr 6 13:16:32 vitja-laptop kernel: [ 232.882977]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.882980]
=======================================================
Apr 6 13:16:32 vitja-laptop kernel: [ 232.883132] [ INFO: possible
circular locking dependency detected ]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.883212] 2.6.25-rc8-wl #1
Apr 6 13:16:32 vitja-laptop kernel: [ 232.883283]
-------------------------------------------------------
Apr 6 13:16:32 vitja-laptop kernel: [ 232.883363] iwl3945/2393 is
trying to acquire lock:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.883439]
(rtnl_mutex){--..}, at: [_end+124024549/2125697968]
ieee80211_sta_expire+0x105/0x160 [mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.883779]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.883780] but task is
already holding lock:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.883920]
(&ifsta->work){--..}, at: [run_workqueue+246/544]
run_workqueue+0xf6/0x220
Apr 6 13:16:32 vitja-laptop kernel: [ 232.884233]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.884235] which lock already
depends on the new lock.
Apr 6 13:16:32 vitja-laptop kernel: [ 232.884237]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.884443]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.884445] the existing
dependency chain (in reverse order) is:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.884589]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.884590] -> #2 (&ifsta->work){--..}:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.884890]
[__lock_acquire+3875/4128] __lock_acquire+0xf23/0x1020
Apr 6 13:16:32 vitja-laptop kernel: [ 232.885399]
[run_workqueue+246/544] run_workqueue+0xf6/0x220
Apr 6 13:16:32 vitja-laptop kernel: [ 232.885906]
[_end+124048800/2125697968] ieee80211_sta_work+0x0/0x680 [mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886448]
[lock_acquire+87/128] lock_acquire+0x57/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[run_workqueue+246/544] run_workqueue+0xf6/0x220
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_spin_unlock_irq+36/48] _spin_unlock_irq+0x24/0x30
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[run_workqueue+314/544] run_workqueue+0x13a/0x220
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[trace_hardirqs_on+208/336] trace_hardirqs_on+0xd0/0x150
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+191/288] worker_thread+0xbf/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[autoremove_wake_function+0/48] autoremove_wake_function+0x0/0x30
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[kthread+75/128] kthread+0x4b/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[child_rip+10/18] child_rip+0xa/0x12
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[restore_args+0/48] restore_args+0x0/0x30
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[kthreadd+262/400] kthreadd+0x106/0x190
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[kthread+0/128] kthread+0x0/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[child_rip+0/18] child_rip+0x0/0x12
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[<ffffffffffffffff>] 0xffffffffffffffff
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] -> #1 ((name)){--..}:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[__lock_acquire+3875/4128] __lock_acquire+0xf23/0x1020
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[lock_acquire+87/128] lock_acquire+0x57/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[flush_workqueue+0/144] flush_workqueue+0x0/0x90
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[flush_workqueue+68/144] flush_workqueue+0x44/0x90
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+123993930/2125697968] ieee80211_stop+0x23a/0x450 [mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[dev_deactivate+180/256] dev_deactivate+0xb4/0x100
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[dev_close+83/112] dev_close+0x53/0x70
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[dev_change_flags+146/432] dev_change_flags+0x92/0x1b0
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[devinet_ioctl+1454/1888] devinet_ioctl+0x5ae/0x760
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[sock_ioctl+207/608] sock_ioctl+0xcf/0x260
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[vfs_ioctl+47/160] vfs_ioctl+0x2f/0xa0
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[do_vfs_ioctl+116/704] do_vfs_ioctl+0x74/0x2c0
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[trace_hardirqs_on+208/336] trace_hardirqs_on+0xd0/0x150
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[sys_ioctl+145/176] sys_ioctl+0x91/0xb0
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[system_call_after_swapgs+123/128] system_call_after_swapgs+0x7b/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[<ffffffffffffffff>] 0xffffffffffffffff
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] -> #0 (rtnl_mutex){--..}:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[print_stack_trace+113/160] print_stack_trace+0x71/0xa0
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[__lock_acquire+3394/4128] __lock_acquire+0xd42/0x1020
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124024549/2125697968] ieee80211_sta_expire+0x105/0x160
[mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[lock_acquire+87/128] lock_acquire+0x57/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124024549/2125697968] ieee80211_sta_expire+0x105/0x160
[mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[mutex_lock_nested+159/640] mutex_lock_nested+0x9f/0x280
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124024549/2125697968] ieee80211_sta_expire+0x105/0x160
[mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124048800/2125697968] ieee80211_sta_work+0x0/0x680 [mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124049560/2125697968] ieee80211_sta_work+0x2f8/0x680 [mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124048800/2125697968] ieee80211_sta_work+0x0/0x680 [mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124048800/2125697968] ieee80211_sta_work+0x0/0x680 [mac80211]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[run_workqueue+320/544] run_workqueue+0x140/0x220
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+191/288] worker_thread+0xbf/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[autoremove_wake_function+0/48] autoremove_wake_function+0x0/0x30
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[kthread+75/128] kthread+0x4b/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[child_rip+10/18] child_rip+0xa/0x12
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[restore_args+0/48] restore_args+0x0/0x30
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[kthreadd+262/400] kthreadd+0x106/0x190
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[kthread+0/128] kthread+0x0/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[child_rip+0/18] child_rip+0x0/0x12
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[<ffffffffffffffff>] 0xffffffffffffffff
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] other info that
might help us debug this:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] 2 locks held by
iwl3945/2393:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] #0:
((name)){--..}, at: [run_workqueue+246/544] run_workqueue+0xf6/0x220
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] #1:
(&ifsta->work){--..}, at: [run_workqueue+246/544]
run_workqueue+0xf6/0x220
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] stack backtrace:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] Pid: 2393, comm:
iwl3945 Not tainted 2.6.25-rc8-wl #1
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] Call Trace:
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[print_circular_bug_tail+131/144] print_circular_bug_tail+0x83/0x90
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[print_stack_trace+113/160] print_stack_trace+0x71/0xa0
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[__lock_acquire+3394/4128] __lock_acquire+0xd42/0x1020
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124024549/2125697968] :mac80211:ieee80211_sta_expire+0x105/0x160
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[lock_acquire+87/128] lock_acquire+0x57/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124024549/2125697968] :mac80211:ieee80211_sta_expire+0x105/0x160
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[mutex_lock_nested+159/640] mutex_lock_nested+0x9f/0x280
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124024549/2125697968] :mac80211:ieee80211_sta_expire+0x105/0x160
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124048800/2125697968] :mac80211:ieee80211_sta_work+0x0/0x680
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124049560/2125697968] :mac80211:ieee80211_sta_work+0x2f8/0x680
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124048800/2125697968] :mac80211:ieee80211_sta_work+0x0/0x680
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[_end+124048800/2125697968] :mac80211:ieee80211_sta_work+0x0/0x680
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[run_workqueue+320/544] run_workqueue+0x140/0x220
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+191/288] worker_thread+0xbf/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[autoremove_wake_function+0/48] autoremove_wake_function+0x0/0x30
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[worker_thread+0/288] worker_thread+0x0/0x120
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] [kthread+75/128]
kthread+0x4b/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] [child_rip+10/18]
child_rip+0xa/0x12
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[restore_args+0/48] restore_args+0x0/0x30
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
[kthreadd+262/400] kthreadd+0x106/0x190
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] [kthread+0/128]
kthread+0x0/0x80
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903] [child_rip+0/18]
child_rip+0x0/0x12
Apr 6 13:16:32 vitja-laptop kernel: [ 232.886903]
Apr 6 13:16:32 vitja-laptop kernel: [ 232.890948] wlan0_rename: No
active IBSS STAs - trying to scan for other IBSS networks with same
SSID (merge)
Apr 6 13:16:36 vitja-laptop kernel: [ 235.512235] phy0: HW CONFIG: freq=2412
Apr 6 13:16:36 vitja-laptop kernel: [ 235.512320] wlan0_rename:
sta_find_ibss (active_ibss=0)
Apr 6 13:16:36 vitja-laptop kernel: [ 235.512403]
bssid=02:25:b0:b1:66:66 found
Apr 6 13:16:36 vitja-laptop kernel: [ 235.512499] sta_find_ibss:
selected 02:25:b0:b1:66:66 current 02:25:b0:b1:66:66
Apr 6 13:16:36 vitja-laptop kernel: [ 235.512592] did not try to join ibss
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