fib6_walk_continue: Unable to handle kernel paging request at virtual address 12005456 #101
Description
I've seen this panic with 6d93f62 a number of times under qemu's palmetto-bmc machine. Unsure at this stage whether it's the kernel or something qemu is doing wrong and I admit my qemu build is a bit of a mashup, but here's the panic output:
Unable to handle kernel paging request at virtual address 12005456
pgd = c0004000
[12005456] *pgd=00000000
Internal error: Oops: 5 [#1] ARM
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 4.7.1-00053-g6d93f625315a-dirty #579
Hardware name: ASpeed SoC
task: c040c700 ti: c0408000 task.ti: c0408000
PC is at fib6_walk_continue+0x74/0x168
LR is at fib6_clean_node+0xb8/0x160
pc : [<c02991d0>] lr : [<c029af0c>] psr: 80000113
sp : c0409d90 ip : 00000001 fp : c8c0f280
r10: c029ae54 r9 : c02992dc r8 : 00000000
r7 : c0409e34 r6 : 00000633 r5 : 00000002 r4 : c0409dc8
r3 : 12005452 r2 : 00000000 r1 : c8e31b60 r0 : 00000000
Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 00093177 Table: 48da0000 DAC: 00000051
Process swapper (pid: 0, stack limit = 0xc0408190)
Stack: (0xc0409d90 to 0xc040a000)
9d80: c0409dc8 c0422908 c0422d28 c02998b8
9da0: 00000000 c040a028 c0422908 c0299c40 00000000 00000000 c0299b9c 60000193
9dc0: c040ca88 c8c0f28c c0422cd4 c0422cd4 c8c0f2a8 12005452 c8fafaa0 00000000
9de0: c040ca00 00000000 00000004 c029ae54 c0426e50 c0422908 c02992dc 00000000
9e00: c0409e34 dc8ba501 c029785c c0422908 00000bb8 c040a028 c0422ca0 c0422d38
9e20: c0414200 c0422908 00000200 c029b040 00000001 00000bb8 00000000 dc8ba501
9e40: 00000000 c0409e74 ffffe000 c040a028 00000100 00000001 c029b0a8 c004e9c8
9e60: 00000001 00000000 c004e954 60000193 c040ca88 c09b11b4 c0577c10 00000000
9e80: c039fceb dc8ba501 c04139c0 c0414200 c0413dfc c0422ca0 c04139c0 c029b0a8
9ea0: c0422908 c004f150 c040a028 00000000 00000000 dc8ba501 00000000 c0408000
9ec0: 40000001 00200000 00000002 c042d8e0 0000000a c042d904 00000100 c0019b90
9ee0: c040c700 df407100 df40715c ffff9f29 00000002 c0414200 c042d900 00000001
9f00: c041ad24 00000000 c041ad24 00000000 df402200 00000001 dfffce80 c03f9a48
9f20: 00000000 c0019f18 00000000 c0045b10 df405020 00000001 c0409f60 00000000
9f40: 00000020 c00094a8 c000ad14 60000013 ffffffff c0409f94 c040a020 c000de30
9f60: 00000000 00093177 00092177 60000013 c0408000 00000001 ffffffff c040a028
9f80: c040a020 dfffce80 c03f9a48 00000000 600000d3 c0409fb0 c000ad08 c000ad14
9fa0: 60000013 ffffffff 00000053 c005e3e0 c0408000 c003ae58 c042d20c c03dbc4c
9fc0: ffffffff ffffffff 00000000 c03db6a8 c03f9a48 00000000 c042d334 c040a03c
9fe0: c03f9a44 c040dd24 40004000 41069265 403f7c2c 40008048 00000000 00000000
[<c02991d0>] (fib6_walk_continue) from [<c02998b8>] (fib6_walk+0x4c/0x68)
[<c02998b8>] (fib6_walk) from [<c0299c40>] (__fib6_clean_all+0xa4/0xfc)
[<c0299c40>] (__fib6_clean_all) from [<c029b040>] (fib6_run_gc+0x80/0xe8)
[<c029b040>] (fib6_run_gc) from [<c004e9c8>] (call_timer_fn+0x74/0x118)
[<c004e9c8>] (call_timer_fn) from [<c004f150>] (run_timer_softirq+0x1ac/0x1fc)
[<c004f150>] (run_timer_softirq) from [<c0019b90>] (__do_softirq+0xc0/0x1f0)
[<c0019b90>] (__do_softirq) from [<c0019f18>] (irq_exit+0x84/0xe8)
[<c0019f18>] (irq_exit) from [<c0045b10>] (__handle_domain_irq+0x84/0xa0)
[<c0045b10>] (__handle_domain_irq) from [<c00094a8>] (avic_handle_irq+0x68/0x70)
[<c00094a8>] (avic_handle_irq) from [<c000de30>] (__irq_svc+0x50/0x64)
Exception stack(0xc0409f60 to 0xc0409fa8)
9f60: 00000000 00093177 00092177 60000013 c0408000 00000001 ffffffff c040a028
9f80: c040a020 dfffce80 c03f9a48 00000000 600000d3 c0409fb0 c000ad08 c000ad14
9fa0: 60000013 ffffffff
[<c000de30>] (__irq_svc) from [<c000ad14>] (arch_cpu_idle+0x2c/0x34)
[<c000ad14>] (arch_cpu_idle) from [<c003ae58>] (cpu_startup_entry+0x7c/0xd8)
[<c003ae58>] (cpu_startup_entry) from [<c03dbc4c>] (start_kernel+0x354/0x3e0)
Code: c02991d0 c02991e4 c0299208 c0299260 (e5932004)
---[ end trace 50fcc4bab94a343d ]---
Kernel panic - not syncing: Fatal exception in interrupt
---[ end Kernel panic - not syncing: Fatal exception in interrupt