[+cc linux-pci for real] On Mon, Nov 18, 2013 at 2:01 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: > [+cc linux-pci] > > 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. > > 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! -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
