On Tuesday, November 19, 2013 6:03 AM, Bjorn Helgaas wrote:
> On Mon, Nov 18, 2013 at 2:01 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote:
>> On Mon, Nov 18, 2013 at 6:53 AM, Bjørn Erik Nilsen <ben@xxxxxxxxxxxxxx> wrote:
>>> I just hit an kernel oops related to PCI (in dw_msi_teardown_irq()/clear_irq()
>>> (pcie-designware))
>>>
>>> Linux version 3.12.0-next-20131105 (bnilsen@bnilsen) (gcc version 4.7.2 (GCC) )
>>>
>>> Problem seem to be dereferencing a null pointer returned from
>>> irq_desc_get_msi_desc(desc) (see attached backtrace).
>>
>> Included oops inline for ease of viewing/searching. Jingooo, I assume
>> you'll investigate this. Let me know if otherwise.
(+cc Marek Vasut, Pratyush Anand, Kishon Vijay Abraham I,
Mohit KUMAR DCG, Ajay KHANDELWAL, Tim Harvey)
Sorry, I will not investigate this.
Bjørn Erik Nilsen,
Would you let us know the ARM platform and LAN card?
If you let us know them, one of these pcie-designware related
people would reproduce and look at the issue.
Best regards,
Jingoo Han
>>
>> Unable to handle kernel NULL pointer dereference at virtual address 00000020
>> pgd = 80004000
>> [00000020] *pgd=00000000
>> Internal error: Oops: 17 [#1] SMP ARM
>> Modules linked in: sxdma(O)
>> CPU: 1 PID: 569 Comm: i2cipc.B3 Tainted: G O 3.12.0-next-20131105 #8
>> task: 9efcb600 ti: 9ec8c000 task.ti: 9ec8c000
>> PC is at dw_msi_teardown_irq+0x40/0x118
>> LR is at trace_hardirqs_on_caller+0xf4/0x1c0
>> pc : [<802c405c>] lr : [<80078370>] psr: 20000013
>> sp : 9ec8dca8 ip : 9ec8dbe0 fp : 9ec8dccc
>> r10: 9fa58800 r9 : 00000000 r8 : 00000001
>> r7 : 9f9fecc0 r6 : 00000188 r5 : 9ecdb580 r4 : 00000000
>> r3 : 9efcb600 r2 : 00000000 r1 : 00000001 r0 : 00000012
>> Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
>> Control: 10c5387d Table: 2ed1804a DAC: 00000015
>> Process i2cipc.B3 (pid: 569, stack limit = 0x9ec8c240)
>> Stack: (0x9ec8dca8 to 0x9ec8e000)
>> dca0: 8005d1a4 802844c8 00000188 9ecdb580 00000004 9fa58c74
>> dcc0: 9ec8dce4 9ec8dcd0 802c1844 802c4028 00000000 00000002 9ec8dd0c 9ec8dce8
>> dce0: 802c1a08 802c1814 00000000 00000004 9fa58c60 00000004 9fa58c74 00000001
>> dd00: 9ec8dd1c 9ec8dd10 802c1a34 802c19ac 9ec8dd44 9ec8dd20 802c1ad0 802c1a30
>> dd20: 9fa58800 8084a410 00047c8c 0000016c 0000016c 00000008 9ec8dd5c 9ec8dd48
>> dd40: 802c2570 802c1a44 00000000 9d580000 9ec8dd74 9ec8dd60 7f0057d4 802c2534
>> dd60: 00000000 9d580000 9ec8dd9c 9ec8dd78 7f000a38 7f00579c 7f0007b8 9f3fa200
>> dd80: 9f5a2bd0 9f0c9cd0 9f383d50 9f383d50 9ec8dddc 9ec8dda0 800d4d40 7f0007c4
>> dda0: 00000000 00000000 800cf478 9f3fa208 9f05b9c0 9efcb8f8 80891d40 9e3aab00
>> ddc0: 9efcb600 9ec8c000 9ec8c000 9d450254 9ec8ddec 9ec8dde0 800d4f18 800d4cb4
>> dde0: 9ec8de0c 9ec8ddf0 8003d7cc 800d4f14 9efcb908 00000001 9efcb600 9d450200
>> de00: 9ec8de44 9ec8de10 80025464 8003d72c 9ec8de3c 00000001 80078370 8007814c
>> de20: 9e0b2604 9ec8decc 9ec8c000 9e0b2604 9ec8de4c 9e0b2604 9ec8de64 9ec8de48
>> de40: 80025b9c 800251cc 9ec8c000 9ec8decc 9ec8c000 9e0b2604 9ec8deb4 9ec8de68
>> de60: 80031490 80025b64 80073404 80073330 9ec8de94 9ec8de80 805faf2c 9ec8deb8
>> de80: 418004fc 9d46e680 9ec8debc 9ec8dfb0 9ec8c000 fffffdfc 9ec8deb8 76d533d0
>> dea0: 9ec8c000 76d533d4 9ec8df7c 9ec8deb8 8001153c 80031278 80078370 8007814c
>> dec0: 40000013 9f072728 8083ffc0 00000009 00000000 00000000 00000000 00000000
>> dee0: 9ec8df04 9ec8def0 805faf1c 80078448 9f072400 81215fc0 9ec8df2c 9ec8df08
>> df00: 8004c6dc 805faef0 00000000 9f072400 00000000 6deff4c8 000003e2 00000000
>> df20: 9ec8df8c 9ec8c000 80011ab8 9efcb600 00000001 9ec8dfb0 9ec8c000 00000000
>> df40: 9ec8df6c 9ec8df50 80078370 8007814c 9ec8c000 9ec8c000 9ec8c000 9ec8c000
>> df60: 8000ea64 9ec8dfb0 9ec8c000 00000000 9ec8dfac 9ec8df80 80011ad4 800112fc
>> df80: 00000000 00000001 8000e8ac 00000000 0341cc18 00000001 000000a8 8000ea64
>> dfa0: 00000000 9ec8dfb0 8000e8f8 80011a58 74ffeaa0 00000002 ffffffff 012f7314
>> dfc0: 00000000 0341cc18 00000001 000000a8 74ffeb98 0341cd80 0341bcf0 74ffece4
>> dfe0: 00000000 74ffea70 76d533c4 76d533d0 80000010 74ffeaa0 00000000 00000000
>> Backtrace:
>> [<802c401c>] (dw_msi_teardown_irq+0x0/0x118) from [<802c1844>]
>> (arch_teardown_msi_irq+0x3c/0x40)
>> r7:9fa58c74 r6:00000004 r5:9ecdb580 r4:00000188
>> [<802c1808>] (arch_teardown_msi_irq+0x0/0x40) from [<802c1a08>]
>> (default_teardown_msi_irqs+0x68/0x84)
>> r4:00000002 r3:00000000
>> [<802c19a0>] (default_teardown_msi_irqs+0x0/0x84) from [<802c1a34>]
>> (arch_teardown_msi_irqs+0x10/0x14)
>> r8:00000001 r7:9fa58c74 r6:00000004 r5:9fa58c60 r4:00000004
>> r3:00000000
>> [<802c1a24>] (arch_teardown_msi_irqs+0x0/0x14) from [<802c1ad0>]
>> (free_msi_irqs+0x98/0x144)
>> [<802c1a38>] (free_msi_irqs+0x0/0x144) from [<802c2570>]
>> (pci_disable_msi+0x48/0x60)
>> [<802c2528>] (pci_disable_msi+0x0/0x60) from [<7f0057d4>]
>> (sxdma_irq_free+0x44/0x48 [sxdma])
>> r4:9d580000 r3:00000000
>> [<7f005790>] (sxdma_irq_free+0x0/0x48 [sxdma]) from [<7f000a38>]
>> (sxdma_dev_release+0x280/0x2b0 [sxdma])
>> r4:9d580000 r3:00000000
>> [<7f0007b8>] (sxdma_dev_release+0x0/0x2b0 [sxdma]) from [<800d4d40>]
>> (__fput+0x98/0x214)
>> r8:9f383d50 r7:9f383d50 r6:9f0c9cd0 r5:9f5a2bd0 r4:9f3fa200
>> r3:7f0007b8
>> [<800d4ca8>] (__fput+0x0/0x214) from [<800d4f18>] (____fput+0x10/0x14)
>> [<800d4f08>] (____fput+0x0/0x14) from [<8003d7cc>] (task_work_run+0xac/0xe0)
>> [<8003d720>] (task_work_run+0x0/0xe0) from [<80025464>] (do_exit+0x2a4/0x8c8)
>> r7:9d450200 r6:9efcb600 r5:00000001 r4:9efcb908
>> [<800251c0>] (do_exit+0x0/0x8c8) from [<80025b9c>] (do_group_exit+0x44/0xb8)
>> r7:9e0b2604
>> [<80025b58>] (do_group_exit+0x0/0xb8) from [<80031490>]
>> (get_signal_to_deliver+0x224/0x5b4)
>> r7:9e0b2604 r6:9ec8c000 r5:9ec8decc r4:9ec8c000
>> [<8003126c>] (get_signal_to_deliver+0x0/0x5b4) from [<8001153c>]
>> (do_signal+0x24c/0x41c)
>> [<800112f0>] (do_signal+0x0/0x41c) from [<80011ad4>] (do_work_pending+0x88/0xc8)
>> [<80011a4c>] (do_work_pending+0x0/0xc8) from [<8000e8f8>]
>> (work_pending+0xc/0x20)
>> r8:8000ea64 r7:000000a8 r6:00000001 r5:0341cc18 r4:00000000
>> Code: 0a000032 e5944024 e3540000 0a00002c (e5943020)
>> ---[ end trace bb8d943ca1a10994 ]---
>> Fixing recursive fault but reboot is needed!
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