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Message-ID: <538232C5.7000306@hartkopp.net>
Date: Sun, 25 May 2014 20:13:25 +0200
From: Oliver Hartkopp <socketcan@...tkopp.net>
To: Linux Netdev List <netdev@...r.kernel.org>
Subject: latest net-next: iwlwifi: reproducible SOFTIRQ-unsafe lock order
detected
Hi all,
with the latest net-next (3.15-rc6) I get a reproducible lock order splash.
When using the latest 3.15-rc6 from Linus' it is fine.
The '-dirty' from the version print is a small change in an unrelated CAN
driver (which was not even plugged-in / loaded that time).
Any ideas? Patches are welcome :-)
Regards,
Oliver
---
[ 15.918348]
[ 15.918354] ======================================================
[ 15.918356] [ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ]
[ 15.918359] 3.15.0-rc6-nn-02649-g54e5c4d-dirty #3 Not tainted
[ 15.918360] ------------------------------------------------------
[ 15.918363] wpa_supplicant/1690 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire:
[ 15.918365] (&(&priv->sta_lock)->rlock){+.....}, at: [<f8cec76d>] iwlagn_tx_skb+0x3ed/0xb40 [iwldvm]
[ 15.918380]
[ 15.918380] and this task is already holding:
[ 15.918382] (_xmit_ETHER#2){+.-...}, at: [<c14103b2>] sch_direct_xmit+0x72/0x2d0
[ 15.918390] which would create a new lock dependency:
[ 15.918391] (_xmit_ETHER#2){+.-...} -> (&(&priv->sta_lock)->rlock){+.....}
[ 15.918397]
[ 15.918397] but this new dependency connects a SOFTIRQ-irq-safe lock:
[ 15.918398] (_xmit_ETHER#2){+.-...}
[ 15.918398] ... which became SOFTIRQ-irq-safe at:
[ 15.918402] [<c107fb58>] __lock_acquire+0x268/0x1890
[ 15.918407] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.918409] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.918414] [<c14103b2>] sch_direct_xmit+0x72/0x2d0
[ 15.918416] [<c13f524f>] __dev_queue_xmit+0x1df/0x610
[ 15.918421] [<c13f568a>] dev_queue_xmit+0xa/0x10
[ 15.918424] [<c13fed15>] neigh_resolve_output+0x175/0x2a0
[ 15.918428] [<c1488cd4>] ip6_finish_output2+0x164/0x870
[ 15.918431] [<c148c9ba>] ip6_finish_output+0x7a/0x1b0
[ 15.918434] [<c148cb30>] ip6_output+0x40/0x230
[ 15.918436] [<c14abbf1>] mld_sendpack+0x2b1/0x630
[ 15.918441] [<c14ad181>] mld_ifc_timer_expire+0x191/0x2c0
[ 15.918444] [<c1045b40>] call_timer_fn+0x70/0x160
[ 15.918449] [<c1045e52>] run_timer_softirq+0x172/0x240
[ 15.918452] [<c103ff53>] __do_softirq+0xf3/0x2a0
[ 15.918455] [<c10043cd>] do_softirq_own_stack+0x1d/0x30
[ 15.918460] [<c1040375>] irq_exit+0xa5/0xb0
[ 15.918463] [<c10299d5>] smp_apic_timer_interrupt+0x35/0x50
[ 15.918469] [<c14dc5a2>] apic_timer_interrupt+0x32/0x38
[ 15.918472]
[ 15.918472] to a SOFTIRQ-irq-unsafe lock:
[ 15.918474] (&(&txq->lock)->rlock){+.+...}
[ 15.918474] ... which became SOFTIRQ-irq-unsafe at:
[ 15.918477] ... [<c107fba3>] __lock_acquire+0x2b3/0x1890
[ 15.918480] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.918482] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.918485] [<f8abe7e2>] iwl_pcie_txq_check_wrptrs+0x52/0x90 [iwlwifi]
[ 15.918497] [<f8abc27c>] iwl_pcie_irq_handler+0xbbc/0x15c0 [iwlwifi]
[ 15.918503] [<c108b7d3>] irq_thread_fn+0x13/0x30
[ 15.918508] [<c108bc6e>] irq_thread+0xee/0x120
[ 15.918510] [<c1059746>] kthread+0x96/0xb0
[ 15.918515] [<c14dcb41>] ret_from_kernel_thread+0x21/0x30
[ 15.918518]
[ 15.918518] other info that might help us debug this:
[ 15.918518]
[ 15.918520] Chain exists of:
[ 15.918520] _xmit_ETHER#2 --> &(&priv->sta_lock)->rlock --> &(&txq->lock)->rlock
[ 15.918520]
[ 15.918525] Possible interrupt unsafe locking scenario:
[ 15.918525]
[ 15.918527] CPU0 CPU1
[ 15.918529] ---- ----
[ 15.918529] lock(&(&txq->lock)->rlock);
[ 15.918532] local_irq_disable();
[ 15.918533] lock(_xmit_ETHER#2);
[ 15.918535] lock(&(&priv->sta_lock)->rlock);
[ 15.918537] <Interrupt>
[ 15.918538] lock(_xmit_ETHER#2);
[ 15.918540]
[ 15.918540] *** DEADLOCK ***
[ 15.918540]
[ 15.918543] 3 locks held by wpa_supplicant/1690:
[ 15.918544] #0: (rcu_read_lock_bh){......}, at: [<c13f5070>] __dev_queue_xmit+0x0/0x610
[ 15.918550] #1: (_xmit_ETHER#2){+.-...}, at: [<c14103b2>] sch_direct_xmit+0x72/0x2d0
[ 15.918554] #2: (rcu_read_lock){......}, at: [<f8e43209>] ieee80211_subif_start_xmit+0x29/0xbc0 [mac80211]
[ 15.918581]
[ 15.918581] the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
[ 15.918597] -> (_xmit_ETHER#2){+.-...} ops: 7 {
[ 15.918602] HARDIRQ-ON-W at:
[ 15.918604] [<c107fe3f>] __lock_acquire+0x54f/0x1890
[ 15.918607] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.918609] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.918612] [<c1410bc8>] dev_deactivate_many+0xa8/0x200
[ 15.918615] [<c1410d3f>] dev_deactivate+0x1f/0x30
[ 15.918617] [<c1405627>] linkwatch_do_dev+0x27/0x50
[ 15.918620] [<c1405919>] __linkwatch_run_queue+0x109/0x130
[ 15.918623] [<c140595b>] linkwatch_event+0x1b/0x30
[ 15.918626] [<c1053847>] process_one_work+0x187/0x490
[ 15.918629] [<c1054429>] worker_thread+0xf9/0x330
[ 15.918632] [<c1059746>] kthread+0x96/0xb0
[ 15.918635] [<c14dcb41>] ret_from_kernel_thread+0x21/0x30
[ 15.918638] IN-SOFTIRQ-W at:
[ 15.918639] [<c107fb58>] __lock_acquire+0x268/0x1890
[ 15.918642] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.918644] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.918647] [<c14103b2>] sch_direct_xmit+0x72/0x2d0
[ 15.918649] [<c13f524f>] __dev_queue_xmit+0x1df/0x610
[ 15.918653] [<c13f568a>] dev_queue_xmit+0xa/0x10
[ 15.918656] [<c13fed15>] neigh_resolve_output+0x175/0x2a0
[ 15.918659] [<c1488cd4>] ip6_finish_output2+0x164/0x870
[ 15.918661] [<c148c9ba>] ip6_finish_output+0x7a/0x1b0
[ 15.918663] [<c148cb30>] ip6_output+0x40/0x230
[ 15.918665] [<c14abbf1>] mld_sendpack+0x2b1/0x630
[ 15.918668] [<c14ad181>] mld_ifc_timer_expire+0x191/0x2c0
[ 15.918671] [<c1045b40>] call_timer_fn+0x70/0x160
[ 15.918674] [<c1045e52>] run_timer_softirq+0x172/0x240
[ 15.918677] [<c103ff53>] __do_softirq+0xf3/0x2a0
[ 15.918680] [<c10043cd>] do_softirq_own_stack+0x1d/0x30
[ 15.918683] [<c1040375>] irq_exit+0xa5/0xb0
[ 15.918685] [<c10299d5>] smp_apic_timer_interrupt+0x35/0x50
[ 15.918688] [<c14dc5a2>] apic_timer_interrupt+0x32/0x38
[ 15.918691] INITIAL USE at:
[ 15.918693] [<c107fbf7>] __lock_acquire+0x307/0x1890
[ 15.918695] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.918698] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.918701] [<c1410bc8>] dev_deactivate_many+0xa8/0x200
[ 15.918703] [<c1410d3f>] dev_deactivate+0x1f/0x30
[ 15.918706] [<c1405627>] linkwatch_do_dev+0x27/0x50
[ 15.918709] [<c1405919>] __linkwatch_run_queue+0x109/0x130
[ 15.918712] [<c140595b>] linkwatch_event+0x1b/0x30
[ 15.918715] [<c1053847>] process_one_work+0x187/0x490
[ 15.918717] [<c1054429>] worker_thread+0xf9/0x330
[ 15.918720] [<c1059746>] kthread+0x96/0xb0
[ 15.918723] [<c14dcb41>] ret_from_kernel_thread+0x21/0x30
[ 15.918725] }
[ 15.918727] ... key at: [<c1d36188>] netdev_xmit_lock_key+0x8/0x1c8
[ 15.918733] ... acquired at:
[ 15.918734] [<c107e52e>] check_irq_usage+0x4e/0xc0
[ 15.918736] [<c1080656>] __lock_acquire+0xd66/0x1890
[ 15.918738] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.918740] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.918742] [<f8cec76d>] iwlagn_tx_skb+0x3ed/0xb40 [iwldvm]
[ 15.918749] [<f8ce9f36>] iwlagn_mac_tx+0x16/0x30 [iwldvm]
[ 15.918756] [<f8e4086e>] __ieee80211_tx+0x21e/0x310 [mac80211]
[ 15.918770] [<f8e424ff>] ieee80211_tx+0x9f/0xd0 [mac80211]
[ 15.918784] [<f8e42e40>] ieee80211_xmit+0x90/0xf0 [mac80211]
[ 15.918798] [<f8e4379f>] ieee80211_subif_start_xmit+0x5bf/0xbc0 [mac80211]
[ 15.918813] [<c13f4db4>] dev_hard_start_xmit+0x2c4/0x580
[ 15.918817] [<c14103d2>] sch_direct_xmit+0x92/0x2d0
[ 15.918819] [<c13f524f>] __dev_queue_xmit+0x1df/0x610
[ 15.918822] [<c13f568a>] dev_queue_xmit+0xa/0x10
[ 15.918824] [<c14cb1bb>] packet_sendmsg+0xa4b/0xcf0
[ 15.918828] [<c13dd409>] sock_sendmsg+0x69/0x90
[ 15.918831] [<c13dda0f>] SYSC_sendto+0xdf/0x110
[ 15.918834] [<c13de8e4>] SYSC_socketcall+0x3b4/0x990
[ 15.918837] [<c13def7e>] SyS_socketcall+0xe/0x10
[ 15.918839] [<c14dcbd0>] sysenter_do_call+0x12/0x36
[ 15.918842]
[ 15.918844]
[ 15.918844] the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock:
[ 15.918858] -> (&(&txq->lock)->rlock){+.+...} ops: 180 {
[ 15.918862] HARDIRQ-ON-W at:
[ 15.918864] [<c107fe3f>] __lock_acquire+0x54f/0x1890
[ 15.918866] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.918868] [<c14db6a0>] _raw_spin_lock_bh+0x40/0x50
[ 15.918871] [<f8abdf2b>] iwl_pcie_enqueue_hcmd+0xfb/0x960 [iwlwifi]
[ 15.918877] [<f8ac03c9>] iwl_trans_pcie_send_hcmd+0xd9/0x5f0 [iwlwifi]
[ 15.918884] [<f8cef9c2>] iwl_dvm_send_cmd+0x72/0x210 [iwldvm]
[ 15.918892] [<f8cefe4a>] iwl_dvm_send_cmd_pdu+0x3a/0x50 [iwldvm]
[ 15.918898] [<f8cebde1>] iwl_load_ucode_wait_alive+0x201/0x3b0 [iwldvm]
[ 15.918903] [<f8cec004>] iwl_run_init_ucode+0x74/0x120 [iwldvm]
[ 15.918909] [<f8ce9d90>] iwlagn_mac_start+0xc0/0x250 [iwldvm]
[ 15.918914] [<f8e30a8f>] ieee80211_do_open+0x2af/0xdd0 [mac80211]
[ 15.918928] [<f8e315fd>] ieee80211_open+0x4d/0x50 [mac80211]
[ 15.918942] [<c13f5d93>] __dev_open+0x83/0xf0
[ 15.918946] [<c13f6035>] __dev_change_flags+0x85/0x160
[ 15.918948] [<c13f6133>] dev_change_flags+0x23/0x60
[ 15.918951] [<c140229d>] do_setlink+0x2cd/0x710
[ 15.918954] [<c140493a>] rtnl_newlink+0x50a/0x6f0
[ 15.918956] [<c14013ff>] rtnetlink_rcv_msg+0x7f/0x1f0
[ 15.918959] [<c141bbd6>] netlink_rcv_skb+0x96/0xb0
[ 15.918963] [<c140136e>] rtnetlink_rcv+0x1e/0x30
[ 15.918966] [<c141b2e8>] netlink_unicast+0xd8/0x190
[ 15.918968] [<c141b5da>] netlink_sendmsg+0x23a/0x6a0
[ 15.918971] [<c13dd409>] sock_sendmsg+0x69/0x90
[ 15.918973] [<c13dd74a>] ___sys_sendmsg.part.18+0x25a/0x270
[ 15.918976] [<c13de13f>] __sys_sendmsg+0x3f/0x70
[ 15.918978] [<c13de69e>] SYSC_socketcall+0x16e/0x990
[ 15.918981] [<c13def7e>] SyS_socketcall+0xe/0x10
[ 15.918983] [<c14dcbd0>] sysenter_do_call+0x12/0x36
[ 15.918985] SOFTIRQ-ON-W at:
[ 15.918987] [<c107fba3>] __lock_acquire+0x2b3/0x1890
[ 15.918990] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.918992] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.918995] [<f8abe7e2>] iwl_pcie_txq_check_wrptrs+0x52/0x90 [iwlwifi]
[ 15.919002] [<f8abc27c>] iwl_pcie_irq_handler+0xbbc/0x15c0 [iwlwifi]
[ 15.919008] [<c108b7d3>] irq_thread_fn+0x13/0x30
[ 15.919011] [<c108bc6e>] irq_thread+0xee/0x120
[ 15.919013] [<c1059746>] kthread+0x96/0xb0
[ 15.919015] [<c14dcb41>] ret_from_kernel_thread+0x21/0x30
[ 15.919018] INITIAL USE at:
[ 15.919019] [<c107fbf7>] __lock_acquire+0x307/0x1890
[ 15.919021] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.919023] [<c14db6a0>] _raw_spin_lock_bh+0x40/0x50
[ 15.919026] [<f8abdf2b>] iwl_pcie_enqueue_hcmd+0xfb/0x960 [iwlwifi]
[ 15.919033] [<f8ac03c9>] iwl_trans_pcie_send_hcmd+0xd9/0x5f0 [iwlwifi]
[ 15.919039] [<f8cef9c2>] iwl_dvm_send_cmd+0x72/0x210 [iwldvm]
[ 15.919046] [<f8cefe4a>] iwl_dvm_send_cmd_pdu+0x3a/0x50 [iwldvm]
[ 15.919053] [<f8cebde1>] iwl_load_ucode_wait_alive+0x201/0x3b0 [iwldvm]
[ 15.919059] [<f8cec004>] iwl_run_init_ucode+0x74/0x120 [iwldvm]
[ 15.919064] [<f8ce9d90>] iwlagn_mac_start+0xc0/0x250 [iwldvm]
[ 15.919070] [<f8e30a8f>] ieee80211_do_open+0x2af/0xdd0 [mac80211]
[ 15.919083] [<f8e315fd>] ieee80211_open+0x4d/0x50 [mac80211]
[ 15.919096] [<c13f5d93>] __dev_open+0x83/0xf0
[ 15.919099] [<c13f6035>] __dev_change_flags+0x85/0x160
[ 15.919102] [<c13f6133>] dev_change_flags+0x23/0x60
[ 15.919105] [<c140229d>] do_setlink+0x2cd/0x710
[ 15.919108] [<c140493a>] rtnl_newlink+0x50a/0x6f0
[ 15.919111] [<c14013ff>] rtnetlink_rcv_msg+0x7f/0x1f0
[ 15.919113] [<c141bbd6>] netlink_rcv_skb+0x96/0xb0
[ 15.919116] [<c140136e>] rtnetlink_rcv+0x1e/0x30
[ 15.919119] [<c141b2e8>] netlink_unicast+0xd8/0x190
[ 15.919121] [<c141b5da>] netlink_sendmsg+0x23a/0x6a0
[ 15.919124] [<c13dd409>] sock_sendmsg+0x69/0x90
[ 15.919127] [<c13dd74a>] ___sys_sendmsg.part.18+0x25a/0x270
[ 15.919129] [<c13de13f>] __sys_sendmsg+0x3f/0x70
[ 15.919132] [<c13de69e>] SYSC_socketcall+0x16e/0x990
[ 15.919134] [<c13def7e>] SyS_socketcall+0xe/0x10
[ 15.919136] [<c14dcbd0>] sysenter_do_call+0x12/0x36
[ 15.919139] }
[ 15.919140] ... key at: [<f8ad1ac8>] __key.46551+0x0/0xffff7538 [iwlwifi]
[ 15.919148] ... acquired at:
[ 15.919149] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.919152] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.919155] [<f8ac0938>] iwl_trans_pcie_tx+0x58/0x6c0 [iwlwifi]
[ 15.919162] [<f8cec8d4>] iwlagn_tx_skb+0x554/0xb40 [iwldvm]
[ 15.919168] [<f8ce9f36>] iwlagn_mac_tx+0x16/0x30 [iwldvm]
[ 15.919173] [<f8e4086e>] __ieee80211_tx+0x21e/0x310 [mac80211]
[ 15.919187] [<f8e424ff>] ieee80211_tx+0x9f/0xd0 [mac80211]
[ 15.919200] [<f8e42e40>] ieee80211_xmit+0x90/0xf0 [mac80211]
[ 15.919210] [<f8e44051>] __ieee80211_tx_skb_tid_band+0x61/0x80 [mac80211]
[ 15.919224] [<f8e47eb6>] ieee80211_send_auth+0x166/0x210 [mac80211]
[ 15.919240] [<f8e5a268>] ieee80211_probe_auth+0x248/0x480 [mac80211]
[ 15.919260] [<f8e5f143>] ieee80211_mgd_auth+0x233/0x2a0 [mac80211]
[ 15.919277] [<f8e346b1>] ieee80211_auth+0x11/0x20 [mac80211]
[ 15.919291] [<f8b53bc7>] cfg80211_mlme_auth+0xe7/0x1f0 [cfg80211]
[ 15.919316] [<f8b4041b>] nl80211_authenticate+0x25b/0x2c0 [cfg80211]
[ 15.919330] [<c141d6a9>] genl_rcv_msg+0x219/0x3b0
[ 15.919333] [<c141bbd6>] netlink_rcv_skb+0x96/0xb0
[ 15.919335] [<c141c05c>] genl_rcv+0x1c/0x30
[ 15.919338] [<c141b2e8>] netlink_unicast+0xd8/0x190
[ 15.919340] [<c141b5da>] netlink_sendmsg+0x23a/0x6a0
[ 15.919343] [<c13dd409>] sock_sendmsg+0x69/0x90
[ 15.919345] [<c13dd74a>] ___sys_sendmsg.part.18+0x25a/0x270
[ 15.919347] [<c13de13f>] __sys_sendmsg+0x3f/0x70
[ 15.919349] [<c13de69e>] SYSC_socketcall+0x16e/0x990
[ 15.919352] [<c13def7e>] SyS_socketcall+0xe/0x10
[ 15.919354] [<c14dcbd0>] sysenter_do_call+0x12/0x36
[ 15.919357]
[ 15.919359] -> (&(&priv->sta_lock)->rlock){+.....} ops: 83 {
[ 15.919363] HARDIRQ-ON-W at:
[ 15.919365] [<c107fe3f>] __lock_acquire+0x54f/0x1890
[ 15.919368] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.919370] [<c14db6a0>] _raw_spin_lock_bh+0x40/0x50
[ 15.919373] [<f8cf5a0a>] iwlagn_alloc_bcast_station+0x1a/0xf0 [iwldvm]
[ 15.919381] [<f8ce9d6b>] iwlagn_mac_start+0x9b/0x250 [iwldvm]
[ 15.919386] [<f8e30a8f>] ieee80211_do_open+0x2af/0xdd0 [mac80211]
[ 15.919397] [<f8e315fd>] ieee80211_open+0x4d/0x50 [mac80211]
[ 15.919410] [<c13f5d93>] __dev_open+0x83/0xf0
[ 15.919412] [<c13f6035>] __dev_change_flags+0x85/0x160
[ 15.919415] [<c13f6133>] dev_change_flags+0x23/0x60
[ 15.919418] [<c140229d>] do_setlink+0x2cd/0x710
[ 15.919421] [<c140493a>] rtnl_newlink+0x50a/0x6f0
[ 15.919423] [<c14013ff>] rtnetlink_rcv_msg+0x7f/0x1f0
[ 15.919425] [<c141bbd6>] netlink_rcv_skb+0x96/0xb0
[ 15.919428] [<c140136e>] rtnetlink_rcv+0x1e/0x30
[ 15.919431] [<c141b2e8>] netlink_unicast+0xd8/0x190
[ 15.919433] [<c141b5da>] netlink_sendmsg+0x23a/0x6a0
[ 15.919436] [<c13dd409>] sock_sendmsg+0x69/0x90
[ 15.919438] [<c13dd74a>] ___sys_sendmsg.part.18+0x25a/0x270
[ 15.919440] [<c13de13f>] __sys_sendmsg+0x3f/0x70
[ 15.919442] [<c13de69e>] SYSC_socketcall+0x16e/0x990
[ 15.919445] [<c13def7e>] SyS_socketcall+0xe/0x10
[ 15.919447] [<c14dcbd0>] sysenter_do_call+0x12/0x36
[ 15.919450] INITIAL USE at:
[ 15.919452] [<c107fbf7>] __lock_acquire+0x307/0x1890
[ 15.919454] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.919456] [<c14db6a0>] _raw_spin_lock_bh+0x40/0x50
[ 15.919459] [<f8cf5a0a>] iwlagn_alloc_bcast_station+0x1a/0xf0 [iwldvm]
[ 15.919466] [<f8ce9d6b>] iwlagn_mac_start+0x9b/0x250 [iwldvm]
[ 15.919471] [<f8e30a8f>] ieee80211_do_open+0x2af/0xdd0 [mac80211]
[ 15.919484] [<f8e315fd>] ieee80211_open+0x4d/0x50 [mac80211]
[ 15.919495] [<c13f5d93>] __dev_open+0x83/0xf0
[ 15.919498] [<c13f6035>] __dev_change_flags+0x85/0x160
[ 15.919501] [<c13f6133>] dev_change_flags+0x23/0x60
[ 15.919504] [<c140229d>] do_setlink+0x2cd/0x710
[ 15.919506] [<c140493a>] rtnl_newlink+0x50a/0x6f0
[ 15.919509] [<c14013ff>] rtnetlink_rcv_msg+0x7f/0x1f0
[ 15.919511] [<c141bbd6>] netlink_rcv_skb+0x96/0xb0
[ 15.919514] [<c140136e>] rtnetlink_rcv+0x1e/0x30
[ 15.919516] [<c141b2e8>] netlink_unicast+0xd8/0x190
[ 15.919519] [<c141b5da>] netlink_sendmsg+0x23a/0x6a0
[ 15.919522] [<c13dd409>] sock_sendmsg+0x69/0x90
[ 15.919524] [<c13dd74a>] ___sys_sendmsg.part.18+0x25a/0x270
[ 15.919526] [<c13de13f>] __sys_sendmsg+0x3f/0x70
[ 15.919528] [<c13de69e>] SYSC_socketcall+0x16e/0x990
[ 15.919531] [<c13def7e>] SyS_socketcall+0xe/0x10
[ 15.919533] [<c14dcbd0>] sysenter_do_call+0x12/0x36
[ 15.919536] }
[ 15.919537] ... key at: [<f8d07324>] __key.46877+0x0/0xffff6cdc [iwldvm]
[ 15.919543] ... acquired at:
[ 15.919544] [<c107e52e>] check_irq_usage+0x4e/0xc0
[ 15.919546] [<c1080656>] __lock_acquire+0xd66/0x1890
[ 15.919548] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.919551] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.919553] [<f8cec76d>] iwlagn_tx_skb+0x3ed/0xb40 [iwldvm]
[ 15.919559] [<f8ce9f36>] iwlagn_mac_tx+0x16/0x30 [iwldvm]
[ 15.919564] [<f8e4086e>] __ieee80211_tx+0x21e/0x310 [mac80211]
[ 15.919579] [<f8e424ff>] ieee80211_tx+0x9f/0xd0 [mac80211]
[ 15.919592] [<f8e42e40>] ieee80211_xmit+0x90/0xf0 [mac80211]
[ 15.919605] [<f8e4379f>] ieee80211_subif_start_xmit+0x5bf/0xbc0 [mac80211]
[ 15.919619] [<c13f4db4>] dev_hard_start_xmit+0x2c4/0x580
[ 15.919622] [<c14103d2>] sch_direct_xmit+0x92/0x2d0
[ 15.919624] [<c13f524f>] __dev_queue_xmit+0x1df/0x610
[ 15.919627] [<c13f568a>] dev_queue_xmit+0xa/0x10
[ 15.919630] [<c14cb1bb>] packet_sendmsg+0xa4b/0xcf0
[ 15.919632] [<c13dd409>] sock_sendmsg+0x69/0x90
[ 15.919634] [<c13dda0f>] SYSC_sendto+0xdf/0x110
[ 15.919636] [<c13de8e4>] SYSC_socketcall+0x3b4/0x990
[ 15.919639] [<c13def7e>] SyS_socketcall+0xe/0x10
[ 15.919641] [<c14dcbd0>] sysenter_do_call+0x12/0x36
[ 15.919643]
[ 15.919645]
[ 15.919645] stack backtrace:
[ 15.919649] CPU: 1 PID: 1690 Comm: wpa_supplicant Not tainted 3.15.0-rc6-nn-02649-g54e5c4d-dirty #3
[ 15.919651] Hardware name: Dell Inc. Latitude E6510/XXXXXX, BIOS A06 11/20/2010
[ 15.919652] 00000000 00000000 ed82383c c14d4a0f c1a7fee0 ed8238cc c107e4d4 c1652abb
[ 15.919658] c1652dfc 0000069a 00000000 00000000 00000000 00000002 00000001 00000000
[ 15.919663] ed823878 c1c74f50 ed823878 c1c74f50 c107c6f0 00000009 c1a7fee0 00000014
[ 15.919669] Call Trace:
[ 15.919673] [<c14d4a0f>] dump_stack+0x48/0x60
[ 15.919676] [<c107e4d4>] check_usage+0x3f4/0x400
[ 15.919681] [<c107c6f0>] ? noop_count+0x10/0x10
[ 15.919684] [<c107ccf3>] ? find_usage_backwards+0x33/0x70
[ 15.919688] [<c107cb6c>] ? __bfs+0xec/0x1d0
[ 15.919691] [<c107e52e>] check_irq_usage+0x4e/0xc0
[ 15.919694] [<c1080656>] __lock_acquire+0xd66/0x1890
[ 15.919697] [<c107e9cd>] ? mark_held_locks+0x5d/0x80
[ 15.919702] [<c112b185>] ? kmem_cache_alloc+0x1a5/0x3f0
[ 15.919705] [<c108120a>] lock_acquire+0x8a/0x110
[ 15.919713] [<f8cec76d>] ? iwlagn_tx_skb+0x3ed/0xb40 [iwldvm]
[ 15.919716] [<c14db64a>] _raw_spin_lock+0x3a/0x50
[ 15.919723] [<f8cec76d>] ? iwlagn_tx_skb+0x3ed/0xb40 [iwldvm]
[ 15.919729] [<f8cec76d>] iwlagn_tx_skb+0x3ed/0xb40 [iwldvm]
[ 15.919732] [<c107e9cd>] ? mark_held_locks+0x5d/0x80
[ 15.919738] [<f8ce9f36>] iwlagn_mac_tx+0x16/0x30 [iwldvm]
[ 15.919752] [<f8e4086e>] __ieee80211_tx+0x21e/0x310 [mac80211]
[ 15.919767] [<f8e424ff>] ieee80211_tx+0x9f/0xd0 [mac80211]
[ 15.919782] [<f8e42e40>] ieee80211_xmit+0x90/0xf0 [mac80211]
[ 15.919797] [<f8e4379f>] ieee80211_subif_start_xmit+0x5bf/0xbc0 [mac80211]
[ 15.919813] [<f8e43209>] ? ieee80211_subif_start_xmit+0x29/0xbc0 [mac80211]
[ 15.919819] [<c13f4db4>] dev_hard_start_xmit+0x2c4/0x580
[ 15.919822] [<c14db651>] ? _raw_spin_lock+0x41/0x50
[ 15.919825] [<c14103d2>] sch_direct_xmit+0x92/0x2d0
[ 15.919829] [<c14db651>] ? _raw_spin_lock+0x41/0x50
[ 15.919832] [<c13f524f>] __dev_queue_xmit+0x1df/0x610
[ 15.919835] [<c13f5070>] ? dev_hard_start_xmit+0x580/0x580
[ 15.919848] [<f8e2efed>] ? ieee80211_netdev_select_queue+0xd/0x10 [mac80211]
[ 15.919851] [<c13f568a>] dev_queue_xmit+0xa/0x10
[ 15.919854] [<c14cb1bb>] packet_sendmsg+0xa4b/0xcf0
[ 15.919857] [<c107fd23>] ? __lock_acquire+0x433/0x1890
[ 15.919860] [<c1080000>] ? __lock_acquire+0x710/0x1890
[ 15.919862] [<c13dd409>] sock_sendmsg+0x69/0x90
[ 15.919868] [<c1232344>] ? _copy_from_user+0x44/0x50
[ 15.919870] [<c13dd790>] ? move_addr_to_kernel+0x30/0x50
[ 15.919872] [<c13dda0f>] SYSC_sendto+0xdf/0x110
[ 15.919878] [<c110d189>] ? might_fault+0x49/0xa0
[ 15.919881] [<c110d189>] ? might_fault+0x49/0xa0
[ 15.919883] [<c110d1cf>] ? might_fault+0x8f/0xa0
[ 15.919886] [<c1232344>] ? _copy_from_user+0x44/0x50
[ 15.919889] [<c13de8e4>] SYSC_socketcall+0x3b4/0x990
[ 15.919891] [<c107ebfb>] ? trace_hardirqs_on+0xb/0x10
[ 15.919897] [<c10f28ba>] ? free_hot_cold_page_list+0x3a/0xa0
[ 15.919900] [<c10f73cf>] ? release_pages+0x6f/0x1c0
[ 15.919905] [<c111f792>] ? free_pages_and_swap_cache+0x92/0xb0
[ 15.919908] [<c110ccd3>] ? tlb_flush_mmu_free+0x23/0x40
[ 15.919910] [<c107e9cd>] ? mark_held_locks+0x5d/0x80
[ 15.919914] [<c112aa45>] ? kmem_cache_free+0xd5/0x100
[ 15.919916] [<c107ebfb>] ? trace_hardirqs_on+0xb/0x10
[ 15.919919] [<c1113d8a>] ? remove_vma+0x4a/0x50
[ 15.919922] [<c1115d46>] ? do_munmap+0x236/0x300
[ 15.919924] [<c14dcc03>] ? sysenter_exit+0xf/0x4c
[ 15.919927] [<c13def7e>] SyS_socketcall+0xe/0x10
[ 15.919929] [<c14dcbd0>] sysenter_do_call+0x12/0x36
--
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