Johannes Berg írta:
> On Sun, 2009-06-21 at 21:49 +0200, Gabor Juhos wrote:
>
>> Please wait with these 3 patches, I got this while the interface is in Master mode:
>>
>> =========================================================
>> [ INFO: possible irq lock inversion dependency detected ]
>> 2.6.30 #37
>> ---------------------------------------------------------
>> swapper/0 just changed the state of lock:
>> (&local->sta_lock){..-...}, at: [<c0252f3c>] ieee80211_beacon_get+0x148/0x518 [mac80211]
>> but this lock took another, SOFTIRQ-unsafe lock in the past:
>> (todo_lock){+.+...}
>
> I don't think this is related to your patches, I think I got the same
> error with hwsim.
You are right, the error is reproducible with hwsim as well:
cat << EOF > /var/run/hostapd-wlan2.conf
ctrl_interface=/var/run/hostapd-wlan2
driver=nl80211
interface=wlan2
hw_mode=g
channel=5
bridge=br-lan
ssid=HWSIM2
debug=0
wpa=2
wpa_pairwise=CCMP
wpa_passphrase=hwsim2pass
EOF
hostapd -B /var/run/hostapd-wlan2.conf
cat << EOF > /var/run/wpa_supplicant-wlan1.conf
ctrl_interface=/var/run/wpa_supplicant-wlan1
network={
scan_ssid=1
ssid="HWSIM2"
key_mgmt=WPA-PSK
proto=RSN
psk="hwsim2pass"
}
EOF
wpa_supplicant -B -D wext -i wlan1 -c /var/run/wpa_supplicant-wlan1.conf
sleep 10
killall wpa_supplicant
cat << EOF > /var/run/hostapd-wlan1.conf
ctrl_interface=/var/run/hostapd-wlan1
driver=nl80211
interface=wlan1
hw_mode=g
channel=5
ssid=HWSIM1
debug=0
wpa=0
EOF
hostapd -B /var/run/hostapd-wlan1.conf
Result:
=========================================================
[ INFO: possible irq lock inversion dependency detected ]
2.6.30 #49
---------------------------------------------------------
hotplug-call/1273 just changed the state of lock:
(&local->sta_lock){..-...}, at: [<c0252f3c>] ieee80211_beacon_get+0x148/0x518
[mac80211]
but this lock took another, SOFTIRQ-unsafe lock in the past:
(todo_lock){+.+...}
and interrupts could create inverse lock ordering between them.
other info that might help us debug this:
4 locks held by hotplug-call/1273:
#0: (&mm->mmap_sem){++++++}, at: [<80073194>] do_page_fault+0x8c/0x2f0
#1: (&data->beacon_timer){+.-...}, at: [<8009495c>] run_timer_softirq+0xf0/0x204
#2: (rcu_read_lock){.+.+..}, at: [<c025595c>]
ieee80211_iterate_active_interfaces_atomic+0x0/0xf4 [mac8
0211]
#3: (rcu_read_lock){.+.+..}, at: [<c0252df4>] ieee80211_beacon_get+0x0/0x518
[mac80211]
the first lock's dependencies:
-> (&local->sta_lock){..-...} ops: 0 {
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<c0252f3c>] ieee80211_beacon_get+0x148/0x518 [mac80211]
[<c0615190>] cleanup_module+0x1034/0x1358 [mac80211_hwsim]
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<c0239fbc>] sta_info_flush+0x60/0x148 [mac80211]
[<c0246528>] ieee80211_if_add+0x458/0x4f4 [mac80211]
}
... key at: [<c0271250>] __this_module+0x1a0/0xffff27fc [mac80211]
-> (&local->key_lock){......} ops: 0 {
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<c0253bd8>] ieee80211_free_keys+0x58/0xe0 [mac80211]
[<c0246388>] ieee80211_if_add+0x2b8/0x4f4 [mac80211]
}
... key at: [<c0271220>] __this_module+0x170/0xffff27fc [mac80211]
-> (todo_lock){+.+...} ops: 0 {
HARDIRQ-ON-W at:
[<800b3cfc>] __lock_acquire+0x630/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<c0253a68>] ieee80211_set_default_key+0x4b8/0x4f0
[mac80211]
SOFTIRQ-ON-W at:
[<800b3d20>] __lock_acquire+0x654/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<c0253a68>] ieee80211_set_default_key+0x4b8/0x4f0
[mac80211]
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<c0253a68>] ieee80211_set_default_key+0x4b8/0x4f0
[mac80211]
}
... key at: [<c0270f00>] mac80211_config_ops+0xf0/0xffff2a9c [mac80211]
-> (&cwq->lock){..-...} ops: 0 {
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<8009d210>] __queue_work+0x20/0x54
[<800949e0>] run_timer_softirq+0x174/0x204
[<8008f0fc>] __do_softirq+0x7c/0x128
[<8008f1f4>] do_softirq+0x4c/0xa0
[<8006082c>] ret_from_irq+0x0/0x4
[<800b4dd4>] lock_acquire+0x70/0x84
[<800d9f7c>] might_fault+0x74/0xa0
[<800f04a8>] cp_new_stat+0x168/0x1a4
[<800f08b0>] sys_newfstat+0x34/0x48
[<80062778>] stack_done+0x20/0x3c
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<8009d210>] __queue_work+0x20/0x54
[<8009d2b0>] queue_work_on+0x50/0x6c
[<8009c38c>] call_usermodehelper_exec+0x104/0x144
[<801861fc>] kobject_uevent_env+0x370/0x3dc
[<80185538>] kset_register+0x44/0x5c
[<801ba354>] bus_register+0xb0/0x260
[<8032e288>] platform_bus_init+0x38/0x64
[<8032e504>] driver_init+0x30/0x44
[<8031e5f8>] kernel_init+0x80/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a9b320>] __key.20477+0x0/0x8
-> (&q->lock){..-.-.} ops: 0 {
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800829e0>] __wake_up+0x30/0x74
[<8008f710>] tasklet_action+0x84/0xf0
[<8008f0fc>] __do_softirq+0x7c/0x128
[<8008f1f4>] do_softirq+0x4c/0xa0
[<8006082c>] ret_from_irq+0x0/0x4
[<8006aff4>] _spin_unlock_irqrestore+0x74/0x8c
[<801b16cc>] uart_write+0xf0/0x120
[<801aa19c>] n_tty_write+0x290/0x3fc
[<801a76a4>] tty_write+0x1b0/0x26c
[<800ecd2c>] sys_write+0x54/0x98
[<80062778>] stack_done+0x20/0x3c
IN-RECLAIM_FS-W at:
[<800b3d64>] __lock_acquire+0x698/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800a1584>] prepare_to_wait+0x34/0x80
[<800d03d4>] kswapd+0xc0/0x4bc
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006ae7c>] _spin_lock_irq+0x48/0x60
[<80067944>] wait_for_common+0x3c/0x188
[<800a10f8>] kthread_create+0x80/0xe8
[<80339b7c>] cpu_callback+0x68/0xd0
[<80324cbc>] spawn_ksoftirqd+0x1c/0x4c
[<8006b0fc>] do_one_initcall+0x64/0x1c8
[<8031e5c4>] kernel_init+0x4c/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a9b6a0>] __key.15349+0x0/0x10
-> (&rq->lock){-.-.-.} ops: 0 {
IN-HARDIRQ-W at:
[<800b3c7c>] __lock_acquire+0x5b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80086f6c>] scheduler_tick+0x24/0xc4
[<8009523c>] update_process_times+0x58/0x70
[<800ae16c>] tick_handle_periodic+0x20/0x140
[<80071530>] c0_compare_interrupt+0x54/0x64
[<800be2d0>] handle_IRQ_event+0x38/0x12c
[<800bff9c>] handle_percpu_irq+0x48/0xa0
[<8006b914>] plat_irq_dispatch+0x90/0x2a4
[<8006082c>] ret_from_irq+0x0/0x4
[<8008a940>] vprintk+0x434/0x460
[<8008a990>] printk+0x24/0x30
[<80326004>] lockdep_info+0x34/0xac
[<8031e8e4>] start_kernel+0x260/0x388
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80084670>] task_rq_lock+0x2c/0x40
[<8008492c>] try_to_wake_up+0x40/0x15c
[<8008f178>] __do_softirq+0xf8/0x128
[<8008f1f4>] do_softirq+0x4c/0xa0
[<8006082c>] ret_from_irq+0x0/0x4
[<800b4dd4>] lock_acquire+0x70/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80092a2c>] __sysctl_head_next+0x28/0xe4
[<800a8a7c>] sysctl_check_lookup+0x128/0x164
[<800a8cf0>] sysctl_check_table+0x1c4/0x6f0
[<800a9190>] sysctl_check_table+0x664/0x6f0
[<800a9190>] sysctl_check_table+0x664/0x6f0
[<8009273c>] __register_sysctl_paths+0x114/0x2f8
[<80331c00>] inet_init+0x6c/0x26c
[<8006b0fc>] do_one_initcall+0x64/0x1c8
[<8031e614>] kernel_init+0x9c/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
IN-RECLAIM_FS-W at:
[<800b3d64>] __lock_acquire+0x698/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006ae7c>] _spin_lock_irq+0x48/0x60
[<80067b80>] __schedule+0x68/0x3c0
[<80067ee8>] schedule+0x10/0x28
[<800d03f4>] kswapd+0xe0/0x4bc
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<803399d4>] init_idle+0x2c/0xc4
[<80324708>] sched_init+0x254/0x290
[<8031e78c>] start_kernel+0x108/0x388
}
... key at: [<80a956cc>] __key.35967+0x0/0x8
-> (&rt_b->rt_runtime_lock){-.....} ops: 0 {
IN-HARDIRQ-W at:
[<800b3c7c>] __lock_acquire+0x5b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80085350>] __enqueue_rt_entity+0x104/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<8008496c>] try_to_wake_up+0x80/0x15c
[<800bda80>] softlockup_tick+0xe4/0x1a8
[<80095210>] update_process_times+0x2c/0x70
[<800aebc0>] tick_sched_timer+0x308/0x35c
[<800a4724>] __run_hrtimer+0x6c/0xc8
[<800a5654>] hrtimer_interrupt+0x224/0x2d0
[<80071530>] c0_compare_interrupt+0x54/0x64
[<800be2d0>] handle_IRQ_event+0x38/0x12c
[<800bff9c>] handle_percpu_irq+0x48/0xa0
[<8006b914>] plat_irq_dispatch+0x90/0x2a4
[<8006082c>] ret_from_irq+0x0/0x4
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80085350>] __enqueue_rt_entity+0x104/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<80084f10>] __sched_setscheduler+0x2b4/0x390
[<800bdb64>] watchdog+0x20/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a956d4>] __key.32178+0x0/0x8
-> (&cpu_base->lock){-.-...} ops: 0 {
IN-HARDIRQ-W at:
[<800b3c7c>] __lock_acquire+0x5b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<800a4894>] hrtimer_run_queues+0x114/0x1b0
[<800950f8>] run_local_timers+0x10/0x24
[<80095210>] update_process_times+0x2c/0x70
[<800ae16c>] tick_handle_periodic+0x20/0x140
[<80071530>] c0_compare_interrupt+0x54/0x64
[<800be2d0>] handle_IRQ_event+0x38/0x12c
[<800bff9c>] handle_percpu_irq+0x48/0xa0
[<8006b914>] plat_irq_dispatch+0x90/0x2a4
[<8006082c>] ret_from_irq+0x0/0x4
[<8008a940>] vprintk+0x434/0x460
[<8008a990>] printk+0x24/0x30
[<801ddfd0>] sock_register+0x94/0xac
[<8033071c>] netlink_proto_init+0x134/0x180
[<8006b0fc>] do_one_initcall+0x64/0x1c8
[<8031e614>] kernel_init+0x9c/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800a4eb4>]
__hrtimer_start_range_ns+0x44/0x298
[<800a5158>] hrtimer_start_range_ns+0x24/0x30
[<800ae874>]
tick_setup_sched_timer+0x224/0x268
[<800a5c24>] hrtimer_run_pending+0xdc/0x15c
[<80094894>] run_timer_softirq+0x28/0x204
[<8008f0fc>] __do_softirq+0x7c/0x128
[<8008f1f4>] do_softirq+0x4c/0xa0
[<8006082c>] ret_from_irq+0x0/0x4
[<800b4dd4>] lock_acquire+0x70/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80092a2c>] __sysctl_head_next+0x28/0xe4
[<800a8a7c>] sysctl_check_lookup+0x128/0x164
[<800a8cf0>] sysctl_check_table+0x1c4/0x6f0
[<800a9190>] sysctl_check_table+0x664/0x6f0
[<800a9190>] sysctl_check_table+0x664/0x6f0
[<8009273c>]
__register_sysctl_paths+0x114/0x2f8
[<80331c00>] inet_init+0x6c/0x26c
[<8006b0fc>] do_one_initcall+0x64/0x1c8
[<8031e614>] kernel_init+0x9c/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800a4eb4>]
__hrtimer_start_range_ns+0x44/0x298
[<800853f8>] __enqueue_rt_entity+0x1ac/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<80084f10>] __sched_setscheduler+0x2b4/0x390
[<800bdb64>] watchdog+0x20/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a9b6e0>] __key.16951+0x0/0x8
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800a4eb4>] __hrtimer_start_range_ns+0x44/0x298
[<800853f8>] __enqueue_rt_entity+0x1ac/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<80084f10>] __sched_setscheduler+0x2b4/0x390
[<800bdb64>] watchdog+0x20/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80085350>] __enqueue_rt_entity+0x104/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<80084f10>] __sched_setscheduler+0x2b4/0x390
[<800bdb64>] watchdog+0x20/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
-> (&rt_rq->rt_runtime_lock){......} ops: 0 {
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80082488>] update_curr_rt+0x124/0x234
[<800866d8>] dequeue_task_rt+0x1c/0x4c
[<800810e8>] dequeue_task+0x9c/0xb8
[<800811b0>] deactivate_task+0x48/0x64
[<80067c24>] __schedule+0x10c/0x3c0
[<80067ee8>] schedule+0x10/0x28
[<800bdb8c>] watchdog+0x48/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a956dc>] __key.35951+0x0/0xc
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80082488>] update_curr_rt+0x124/0x234
[<800866d8>] dequeue_task_rt+0x1c/0x4c
[<800810e8>] dequeue_task+0x9c/0xb8
[<800811b0>] deactivate_task+0x48/0x64
[<80067c24>] __schedule+0x10c/0x3c0
[<80067ee8>] schedule+0x10/0x28
[<800bdb8c>] watchdog+0x48/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80084670>] task_rq_lock+0x2c/0x40
[<8008492c>] try_to_wake_up+0x40/0x15c
[<80081380>] __wake_up_common+0x54/0xc0
[<800828ec>] complete+0x4c/0x6c
[<800a119c>] kthread+0x3c/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800829e0>] __wake_up+0x30/0x74
[<8009d224>] __queue_work+0x34/0x54
[<8009d2b0>] queue_work_on+0x50/0x6c
[<8009c38c>] call_usermodehelper_exec+0x104/0x144
[<801861fc>] kobject_uevent_env+0x370/0x3dc
[<80185538>] kset_register+0x44/0x5c
[<801ba354>] bus_register+0xb0/0x260
[<8032e288>] platform_bus_init+0x38/0x64
[<8032e504>] driver_init+0x30/0x44
[<8031e5f8>] kernel_init+0x80/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<8009d210>] __queue_work+0x20/0x54
[<8009d2b0>] queue_work_on+0x50/0x6c
[<c0253288>] ieee80211_beacon_get+0x494/0x518 [mac80211]
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<c0253218>] ieee80211_beacon_get+0x424/0x518 [mac80211]
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<c0253b18>] ieee80211_key_free+0x78/0xe0 [mac80211]
[<c0239824>] ieee80211_alloc_hw+0x1240/0x13ec [mac80211]
-> (&sta->flaglock){..-...} ops: 0 {
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<c024cb48>] ieee80211_rx_irqsafe+0x10cc/0x3568 [mac80211]
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<c0243d04>] ieee80211_beacon_loss_work+0x4d0/0xcc8
[mac80211]
}
... key at: [<c0271260>] __this_module+0x1b0/0xffff27fc [mac80211]
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<c023988c>] ieee80211_alloc_hw+0x12a8/0x13ec [mac80211]
the second lock's dependencies:
-> (todo_lock){+.+...} ops: 0 {
HARDIRQ-ON-W at:
[<800b3cfc>] __lock_acquire+0x630/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<c0253a68>] ieee80211_set_default_key+0x4b8/0x4f0
[mac80211]
SOFTIRQ-ON-W at:
[<800b3d20>] __lock_acquire+0x654/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<c0253a68>] ieee80211_set_default_key+0x4b8/0x4f0
[mac80211]
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<c0253a68>] ieee80211_set_default_key+0x4b8/0x4f0 [mac80211]
}
... key at: [<c0270f00>] mac80211_config_ops+0xf0/0xffff2a9c [mac80211]
-> (&cwq->lock){..-...} ops: 0 {
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<8009d210>] __queue_work+0x20/0x54
[<800949e0>] run_timer_softirq+0x174/0x204
[<8008f0fc>] __do_softirq+0x7c/0x128
[<8008f1f4>] do_softirq+0x4c/0xa0
[<8006082c>] ret_from_irq+0x0/0x4
[<800b4dd4>] lock_acquire+0x70/0x84
[<800d9f7c>] might_fault+0x74/0xa0
[<800f04a8>] cp_new_stat+0x168/0x1a4
[<800f08b0>] sys_newfstat+0x34/0x48
[<80062778>] stack_done+0x20/0x3c
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<8009d210>] __queue_work+0x20/0x54
[<8009d2b0>] queue_work_on+0x50/0x6c
[<8009c38c>] call_usermodehelper_exec+0x104/0x144
[<801861fc>] kobject_uevent_env+0x370/0x3dc
[<80185538>] kset_register+0x44/0x5c
[<801ba354>] bus_register+0xb0/0x260
[<8032e288>] platform_bus_init+0x38/0x64
[<8032e504>] driver_init+0x30/0x44
[<8031e5f8>] kernel_init+0x80/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a9b320>] __key.20477+0x0/0x8
-> (&q->lock){..-.-.} ops: 0 {
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800829e0>] __wake_up+0x30/0x74
[<8008f710>] tasklet_action+0x84/0xf0
[<8008f0fc>] __do_softirq+0x7c/0x128
[<8008f1f4>] do_softirq+0x4c/0xa0
[<8006082c>] ret_from_irq+0x0/0x4
[<8006aff4>] _spin_unlock_irqrestore+0x74/0x8c
[<801b16cc>] uart_write+0xf0/0x120
[<801aa19c>] n_tty_write+0x290/0x3fc
[<801a76a4>] tty_write+0x1b0/0x26c
[<800ecd2c>] sys_write+0x54/0x98
[<80062778>] stack_done+0x20/0x3c
IN-RECLAIM_FS-W at:
[<800b3d64>] __lock_acquire+0x698/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800a1584>] prepare_to_wait+0x34/0x80
[<800d03d4>] kswapd+0xc0/0x4bc
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006ae7c>] _spin_lock_irq+0x48/0x60
[<80067944>] wait_for_common+0x3c/0x188
[<800a10f8>] kthread_create+0x80/0xe8
[<80339b7c>] cpu_callback+0x68/0xd0
[<80324cbc>] spawn_ksoftirqd+0x1c/0x4c
[<8006b0fc>] do_one_initcall+0x64/0x1c8
[<8031e5c4>] kernel_init+0x4c/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a9b6a0>] __key.15349+0x0/0x10
-> (&rq->lock){-.-.-.} ops: 0 {
IN-HARDIRQ-W at:
[<800b3c7c>] __lock_acquire+0x5b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80086f6c>] scheduler_tick+0x24/0xc4
[<8009523c>] update_process_times+0x58/0x70
[<800ae16c>] tick_handle_periodic+0x20/0x140
[<80071530>] c0_compare_interrupt+0x54/0x64
[<800be2d0>] handle_IRQ_event+0x38/0x12c
[<800bff9c>] handle_percpu_irq+0x48/0xa0
[<8006b914>] plat_irq_dispatch+0x90/0x2a4
[<8006082c>] ret_from_irq+0x0/0x4
[<8008a940>] vprintk+0x434/0x460
[<8008a990>] printk+0x24/0x30
[<80326004>] lockdep_info+0x34/0xac
[<8031e8e4>] start_kernel+0x260/0x388
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80084670>] task_rq_lock+0x2c/0x40
[<8008492c>] try_to_wake_up+0x40/0x15c
[<8008f178>] __do_softirq+0xf8/0x128
[<8008f1f4>] do_softirq+0x4c/0xa0
[<8006082c>] ret_from_irq+0x0/0x4
[<800b4dd4>] lock_acquire+0x70/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80092a2c>] __sysctl_head_next+0x28/0xe4
[<800a8a7c>] sysctl_check_lookup+0x128/0x164
[<800a8cf0>] sysctl_check_table+0x1c4/0x6f0
[<800a9190>] sysctl_check_table+0x664/0x6f0
[<800a9190>] sysctl_check_table+0x664/0x6f0
[<8009273c>] __register_sysctl_paths+0x114/0x2f8
[<80331c00>] inet_init+0x6c/0x26c
[<8006b0fc>] do_one_initcall+0x64/0x1c8
[<8031e614>] kernel_init+0x9c/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
IN-RECLAIM_FS-W at:
[<800b3d64>] __lock_acquire+0x698/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006ae7c>] _spin_lock_irq+0x48/0x60
[<80067b80>] __schedule+0x68/0x3c0
[<80067ee8>] schedule+0x10/0x28
[<800d03f4>] kswapd+0xe0/0x4bc
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<803399d4>] init_idle+0x2c/0xc4
[<80324708>] sched_init+0x254/0x290
[<8031e78c>] start_kernel+0x108/0x388
}
... key at: [<80a956cc>] __key.35967+0x0/0x8
-> (&rt_b->rt_runtime_lock){-.....} ops: 0 {
IN-HARDIRQ-W at:
[<800b3c7c>] __lock_acquire+0x5b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80085350>] __enqueue_rt_entity+0x104/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<8008496c>] try_to_wake_up+0x80/0x15c
[<800bda80>] softlockup_tick+0xe4/0x1a8
[<80095210>] update_process_times+0x2c/0x70
[<800aebc0>] tick_sched_timer+0x308/0x35c
[<800a4724>] __run_hrtimer+0x6c/0xc8
[<800a5654>] hrtimer_interrupt+0x224/0x2d0
[<80071530>] c0_compare_interrupt+0x54/0x64
[<800be2d0>] handle_IRQ_event+0x38/0x12c
[<800bff9c>] handle_percpu_irq+0x48/0xa0
[<8006b914>] plat_irq_dispatch+0x90/0x2a4
[<8006082c>] ret_from_irq+0x0/0x4
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80085350>] __enqueue_rt_entity+0x104/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<80084f10>] __sched_setscheduler+0x2b4/0x390
[<800bdb64>] watchdog+0x20/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a956d4>] __key.32178+0x0/0x8
-> (&cpu_base->lock){-.-...} ops: 0 {
IN-HARDIRQ-W at:
[<800b3c7c>] __lock_acquire+0x5b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<800a4894>] hrtimer_run_queues+0x114/0x1b0
[<800950f8>] run_local_timers+0x10/0x24
[<80095210>] update_process_times+0x2c/0x70
[<800ae16c>] tick_handle_periodic+0x20/0x140
[<80071530>] c0_compare_interrupt+0x54/0x64
[<800be2d0>] handle_IRQ_event+0x38/0x12c
[<800bff9c>] handle_percpu_irq+0x48/0xa0
[<8006b914>] plat_irq_dispatch+0x90/0x2a4
[<8006082c>] ret_from_irq+0x0/0x4
[<8008a940>] vprintk+0x434/0x460
[<8008a990>] printk+0x24/0x30
[<801ddfd0>] sock_register+0x94/0xac
[<8033071c>] netlink_proto_init+0x134/0x180
[<8006b0fc>] do_one_initcall+0x64/0x1c8
[<8031e614>] kernel_init+0x9c/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
IN-SOFTIRQ-W at:
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800a4eb4>] __hrtimer_start_range_ns+0x44/0x298
[<800a5158>] hrtimer_start_range_ns+0x24/0x30
[<800ae874>] tick_setup_sched_timer+0x224/0x268
[<800a5c24>] hrtimer_run_pending+0xdc/0x15c
[<80094894>] run_timer_softirq+0x28/0x204
[<8008f0fc>] __do_softirq+0x7c/0x128
[<8008f1f4>] do_softirq+0x4c/0xa0
[<8006082c>] ret_from_irq+0x0/0x4
[<800b4dd4>] lock_acquire+0x70/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80092a2c>] __sysctl_head_next+0x28/0xe4
[<800a8a7c>] sysctl_check_lookup+0x128/0x164
[<800a8cf0>] sysctl_check_table+0x1c4/0x6f0
[<800a9190>] sysctl_check_table+0x664/0x6f0
[<800a9190>] sysctl_check_table+0x664/0x6f0
[<8009273c>] __register_sysctl_paths+0x114/0x2f8
[<80331c00>] inet_init+0x6c/0x26c
[<8006b0fc>] do_one_initcall+0x64/0x1c8
[<8031e614>] kernel_init+0x9c/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800a4eb4>] __hrtimer_start_range_ns+0x44/0x298
[<800853f8>] __enqueue_rt_entity+0x1ac/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<80084f10>] __sched_setscheduler+0x2b4/0x390
[<800bdb64>] watchdog+0x20/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a9b6e0>] __key.16951+0x0/0x8
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800a4eb4>] __hrtimer_start_range_ns+0x44/0x298
[<800853f8>] __enqueue_rt_entity+0x1ac/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<80084f10>] __sched_setscheduler+0x2b4/0x390
[<800bdb64>] watchdog+0x20/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80085350>] __enqueue_rt_entity+0x104/0x1e4
[<80086690>] enqueue_task_rt+0x44/0x70
[<80081034>] enqueue_task+0x34/0x4c
[<8008114c>] activate_task+0x48/0x64
[<80084f10>] __sched_setscheduler+0x2b4/0x390
[<800bdb64>] watchdog+0x20/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
-> (&rt_rq->rt_runtime_lock){......} ops: 0 {
INITIAL USE at:
[<800b3d7c>] __lock_acquire+0x6b0/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80082488>] update_curr_rt+0x124/0x234
[<800866d8>] dequeue_task_rt+0x1c/0x4c
[<800810e8>] dequeue_task+0x9c/0xb8
[<800811b0>] deactivate_task+0x48/0x64
[<80067c24>] __schedule+0x10c/0x3c0
[<80067ee8>] schedule+0x10/0x28
[<800bdb8c>] watchdog+0x48/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
}
... key at: [<80a956dc>] __key.35951+0x0/0xc
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80082488>] update_curr_rt+0x124/0x234
[<800866d8>] dequeue_task_rt+0x1c/0x4c
[<800810e8>] dequeue_task+0x9c/0xb8
[<800811b0>] deactivate_task+0x48/0x64
[<80067c24>] __schedule+0x10c/0x3c0
[<80067ee8>] schedule+0x10/0x28
[<800bdb8c>] watchdog+0x48/0x88
[<800a11c0>] kthread+0x60/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006a974>] _spin_lock+0x34/0x48
[<80084670>] task_rq_lock+0x2c/0x40
[<8008492c>] try_to_wake_up+0x40/0x15c
[<80081380>] __wake_up_common+0x54/0xc0
[<800828ec>] complete+0x4c/0x6c
[<800a119c>] kthread+0x3c/0xa4
[<8006cee4>] kernel_thread_helper+0x10/0x18
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<800829e0>] __wake_up+0x30/0x74
[<8009d224>] __queue_work+0x34/0x54
[<8009d2b0>] queue_work_on+0x50/0x6c
[<8009c38c>] call_usermodehelper_exec+0x104/0x144
[<801861fc>] kobject_uevent_env+0x370/0x3dc
[<80185538>] kset_register+0x44/0x5c
[<801ba354>] bus_register+0xb0/0x260
[<8032e288>] platform_bus_init+0x38/0x64
[<8032e504>] driver_init+0x30/0x44
[<8031e5f8>] kernel_init+0x80/0x10c
[<8006cee4>] kernel_thread_helper+0x10/0x18
... acquired at:
[<800b3310>] validate_chain+0xb44/0xf00
[<800b3ee4>] __lock_acquire+0x818/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<8009d210>] __queue_work+0x20/0x54
[<8009d2b0>] queue_work_on+0x50/0x6c
[<c0253288>] ieee80211_beacon_get+0x494/0x518 [mac80211]
stack backtrace:
Call Trace:
[<800706e4>] dump_stack+0x8/0x34
[<800b065c>] print_irq_inversion_bug+0x1a0/0x1c4
[<800b4918>] check_usage_forwards+0xd0/0xf0
[<800b0c74>] mark_lock+0x408/0x6f0
[<800b3ca0>] __lock_acquire+0x5d4/0x8b0
[<800b4dc0>] lock_acquire+0x5c/0x84
[<8006aa30>] _spin_lock_irqsave+0x50/0x74
[<c0252f3c>] ieee80211_beacon_get+0x148/0x518 [mac80211]
[<c0615190>] cleanup_module+0x1034/0x1358 [mac80211_hwsim]
> I'll look into it, but it might take a bit longer.
Thanks!
-Gabor
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