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3.4-rc5: Oops in run_timer_softirq()

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Hi,
  I have enabled my wifi in the Dell Vostro 3550 laptop by the hardware button combination
Fn+F2 and disabled it back again after few seconds. The following crash happened, and is
quite reproducible. Is that to be fixed by the patch in 
"Re: Suspicious RCU usage in mac80211" thread from this email list?

[  385.231175] BUG: unable to handle kernel NULL pointer dereference at           (null)
[  385.231226] IP: [<          (null)>]           (null)
[  385.231245] PGD 0 
[  385.231257] Oops: 0010 [#1] SMP 
[  385.231273] CPU 3 
[  385.231283] Modules linked in: iwlwifi i2c_i801 usb_storage
[  385.231308] 
[  385.231317] Pid: 0, comm: swapper/3 Not tainted 3.4.0-rc5-default #5 Dell Inc. Vostro 3550/0JGC48
[  385.231350] RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
[  385.231383] RSP: 0018:ffff88041fb83e78  EFLAGS: 00010286
[  385.231402] RAX: ffff88041fb83eb0 RBX: 0000000000000100 RCX: 0000000000000838
[  385.231426] RDX: ffff88041fb83eb0 RSI: dead000000200200 RDI: 0000000000000000
[  385.231449] RBP: ffff88041fb83ef0 R08: ffff88041fb83eb8 R09: 0000000000000001
[  385.231480] R10: 0000000000000400 R11: ffffffff816074a5 R12: ffff88040f3b8000
[  385.231503] R13: ffff88040f3c1fd8 R14: ffff88041fb83eb0 R15: 0000000000000000
[  385.231526] FS:  0000000000000000(0000) GS:ffff88041fb80000(0000) knlGS:0000000000000000
[  385.231552] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  385.231570] CR2: 0000000000000000 CR3: 0000000001913000 CR4: 00000000000407e0
[  385.231592] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  385.231614] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  385.231638] Process swapper/3 (pid: 0, threadinfo ffff88040f3c0000, task ffff88040f3bd350)
[  385.231663] Stack:
[  385.231673]  ffffffff81083f91 ffff88040f3c1fd8 ffff88040f3b9c20 ffff88040f3b9820
[  385.231702]  ffff88040f3b9420 ffff88040f3b9020 0000000000000000 ffff88041fb83eb0
[  385.231730]  ffff88041fb83eb0 ffffffff81043e21 ffffffff8190c088 ffff88040f3c1fd8
[  385.231759] Call Trace:
[  385.231770]  <IRQ> 
[  385.231784]  [<ffffffff81083f91>] ? run_timer_softirq+0x191/0x223
[  385.231806]  [<ffffffff81043e21>] ? lapic_next_event+0x10/0x14
[  385.231827]  [<ffffffff8107fbcc>] __do_softirq+0x83/0x10d
[  385.231846]  [<ffffffff810ae18f>] ? tick_program_event+0x1f/0x21
[  385.231869]  [<ffffffff815e2a8c>] call_softirq+0x1c/0x30
[  385.231889]  [<ffffffff8102e042>] do_softirq+0x33/0x69
[  385.231907]  [<ffffffff8107fe05>] irq_exit+0x3f/0x9a
[  385.231926]  [<ffffffff8104417c>] smp_apic_timer_interrupt+0x77/0x85
[  385.231948]  [<ffffffff815e2307>] apic_timer_interrupt+0x67/0x70
[  385.231967]  <EOI> 
[  385.231979]  [<ffffffff8109a149>] ? wake_up_process+0x10/0x12
[  385.231999]  [<ffffffff810aebce>] ? tick_nohz_idle_exit+0x135/0x13c
[  385.232020]  [<ffffffff81033fcd>] cpu_idle+0x78/0x7f
[  385.232039]  [<ffffffff815daf6b>] start_secondary+0x18f/0x193
[  385.232057] Code:  Bad RIP value.
[  385.232075] RIP  [<          (null)>]           (null)
[  385.232093]  RSP <ffff88041fb83e78>
[  385.232107] CR2: 0000000000000000
[  385.232309] [drm] Changing LVDS panel from (-hsync, -vsync) to (+hsync, -vsync)
[  385.593328] ---[ end trace e3eed09b44fc9be3 ]---



09:00.0 Network controller: Intel Corporation Centrino Wireless-N 1030 (rev 34)
        Subsystem: Intel Corporation Centrino Wireless-N 1030 BGN
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 53
        Region 0: Memory at f7e00000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [c8] Power Management version 3
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
                Address: 00000000fee003f8  Data: 0000
        Capabilities: [e0] Express (v1) Endpoint, MSI 00
                DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 unlimited
                        ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
                        RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset-
                        MaxPayload 128 bytes, MaxReadReq 128 bytes
                DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr+ TransPend-
                LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 <32us
                        ClockPM+ Surprise- LLActRep- BwNot-
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
        Capabilities: [100 v1] Advanced Error Reporting
                UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
                UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
                UESvrt: DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
                CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
                CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
                AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn-
        Capabilities: [140 v1] Device Serial Number 4c-80-93-ff-ff-15-e6-c7
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi
00: 86 80 8a 00 06 00 10 00 34 00 80 02 10 00 00 00
10: 04 00 e0 f7 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 25 53
30: 00 00 00 00 c8 00 00 00 00 00 00 00 0a 01 00 00
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 01 d0 23 c8 00 00 00 0d
d0: 05 e0 81 00 f8 03 e0 fe 00 00 00 00 00 00 00 00
e0: 10 00 01 00 c0 8e 00 10 00 08 19 00 11 ec 06 00
f0: 40 00 11 10 00 00 00 00 00 00 00 00 00 00 00 00


Thanks,
Martin
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