Hi,
Observed with kvm-arm-for-v4.8-rc3 when enabling memory debugging
options on top of defconfig. defconfig'ed kernel does not have
such issue though.
Below is the console log:
[ 757.644120] Unable to handle kernel paging request at virtual address
ffff800661e00000
[ 757.652046] pgd = ffff20000b1a2000
[ 757.655471] [ffff800661e00000] *pgd=00000047fffe3003,
*pud=00000047fcd8c003, *pmd=00000047fcc7c003, *pte=00e8004661e00712
[ 757.666492] Internal error: Oops: 96000147 [#3] PREEMPT SMP
[ 757.672041] Modules linked in:
[ 757.675100] CPU: 7 PID: 3630 Comm: qemu-system-aar Tainted: G D
4.8.0-rc1 #3
[ 757.683240] Hardware name: AppliedMicro X-Gene Mustang Board/X-Gene
Mustang Board, BIOS 3.06.15 Aug 19 2016
[ 757.692938] task: ffff80069cdd3580 task.stack: ffff8006adb7c000
[ 757.698840] PC is at __flush_dcache_area+0x1c/0x40
[ 757.703613] LR is at kvm_flush_dcache_pmd+0x60/0x70
[ 757.708469] pc : [<ffff20000809dbdc>] lr : [<ffff2000080b4a70>]
pstate: 20000145
[ 757.715830] sp : ffff8006adb7f8b0
[ 757.719130] x29: ffff8006adb7f8b0 x28: ffff200008cd6520
[ 757.724445] x27: ffff80069cce4568 x26: ffff80069cce4480
[ 757.729756] x25: 0000000000000000 x24: 0000000000000000
[ 757.735065] x23: ffff8006ac0f0000 x22: 000000000069fce8
[ 757.740376] x21: ffff80069fce8000 x20: ffff200009635000
[ 757.745690] x19: 0000000004661e00 x18: 0000000000000000
[ 757.751005] x17: 0000000000000000 x16: 000000007f02ac80
[ 757.756316] x15: 0000000000000000 x14: 0000000000000000
[ 757.761625] x13: 0000000000000000 x12: ffffffffffffffff
[ 757.766936] x11: 0000000000000040 x10: 1ffff000d5b6fefe
[ 757.772247] x9 : ffff8006adb7f650 x8 : dfff200000000000
[ 757.777558] x7 : ffff2000081665f8 x6 : 0000000000000000
[ 757.782870] x5 : 0000000000000003 x4 : 0000000000000000
[ 757.788181] x3 : 000000000000003f x2 : 0000000000000040
[ 757.793491] x1 : ffff800662000000 x0 : ffff800661e00000
[ 757.798800]
[ 757.800286] Process qemu-system-aar (pid: 3630, stack limit =
0xffff8006adb7c020)
[ 757.807735] Stack: (0xffff8006adb7f8b0 to 0xffff8006adb80000)
[ 757.813457] f8a0: ffff8006adb7f8e0
ffff2000080b6748
[ 757.821253] f8c0: 0000000000200000 0000000040000000 ffff80069fce8000
0000004661e0077d
[ 757.829049] f8e0: ffff8006adb7f970 ffff2000080b708c ffff80069cce4480
ffff80069cce52e8
[ 757.836846] f900: ffff80069cce4480 ffff80069cce4480 ffff80069cce5170
ffff80069cce5538
[ 757.844643] f920: ffff8006b217a5d8 ffff80069cce5520 ffff80069cce4568
ffff200008cd6520
[ 757.852438] f940: 000000069fce8000 ffff20000826e9f0 ffff200009635b30
000000ffffffffff
[ 757.860234] f960: 0000010000000000 000000003fffffff ffff8006adb7f990
ffff2000080b2280
[ 757.868031] f980: ffff80069cce4898 ffff80069cce5090 ffff8006adb7f9c0
ffff2000080aa330
[ 757.875825] f9a0: ffff8006b205f2b0 ffff8006cc3ea880 0000000000000000
ffff2000080aa318
[ 757.883621] f9c0: ffff8006adb7fa30 ffff2000080aa524 ffff80069cce4480
ffff8006b217a5e8
[ 757.891416] f9e0: ffff8006d5878fc8 ffff8006b217a5e0 ffff8006b217a5d0
ffff8006b217a644
[ 757.899212] fa00: ffff8006b217a5d8 ffff200009653da0 ffff8007faaf11e0
ffff8006bb5a1268
[ 757.907008] fa20: ffff8006b217a5d0 ffff8006910e9300 ffff8006adb7fa50
ffff2000082ad234
[ 757.914802] fa40: ffff8006b217a5c0 ffff2000082ad220 ffff8006adb7fac0
ffff2000082ad46c
[ 757.922599] fa60: ffff8006b217f0c0 ffff8006b217f0c0 ffff80069cdd3c38
ffff80069cdd3580
[ 757.930397] fa80: ffff200009b11ac0 ffff200008ce8fe0 ffff8006c8b7d740
ffff8006adb7fbc0
[ 757.938193] faa0: ffff8006910e9300 ffff80069cdd38f8 ffff8006adb7fad0
000000030810466c
[ 757.945987] fac0: ffff8006adb7fad0 ffff200008104658 ffff8006adb7fb10
ffff2000080dc8ec
[ 757.953782] fae0: ffff80069cdd3580 ffff80069cdd39e8 ffff8006910e93b0
0000000000000001
[ 757.961579] fb00: ffff8006910e9300 00000000000391e7 ffff8006adb7fc00
ffff2000080dd5fc
[ 757.969374] fb20: ffff8006c8b7d740 0000000000000000 ffff8006adb7c000
ffff8006adb7c010
[ 757.977169] fb40: ffff8006c8b7d7ec ffff8006adb7c000 ffff8006adb7c010
ffff8006c6dc7148
[ 757.984966] fb60: ffff80069cdd3580 ffff8006adb7c010 ffff80069cdd3948
ffff80069cdd3ca0
[ 757.992763] fb80: ffff80069cdd3594 ffff8006910e93b0 00000000adb7c010
ffff80069cdd3be0
[ 758.000558] fba0: 0000000041b58ab3 ffff2000092484c8 ffff2000080dc460
ffff8006c6dc7148
[ 758.008355] fbc0: ffff8006adb7fbd0 ffff200008141efc ffff8006adb7fc10
ffff200008142210
[ 758.016153] fbe0: ffff8006c6dc7148 ffff8006adb7c000 ffff8006adb7fc00
ffff2000080dd5ec
[ 758.023950] fc00: ffff8006adb7fc50 ffff2000080ed924 ffff8006adb7c000
ffff8006adb7c000
[ 758.031747] fc20: ffff8006adb7c010 0000000000418004 ffff8006adb7fde0
ffff8006adb7c000
[ 758.039542] fc40: ffff8006adb7c010 ffff8006c6dc7148 ffff8006adb7fce0
ffff20000808a098
[ 758.047336] fc60: ffff8006adb7fec0 1ffff000d5b6ffb4 fffffffffffffdfc
ffff8006adb7fdc0
[ 758.055132] fc80: ffff8006adb7ffc0 0000ffffa287c87c 0000ffffa287c880
0000000000000062
[ 758.062926] fca0: ffff200008cc5000 ffff8006adb7c000 ffff8006b217cf10
ffff8006adb7fe80
[ 758.070720] fcc0: ffff8006adb7fdc0 ffff8006c8b7d7ec ffff8006c6dc6940
ffff8006c8b7d740
[ 758.078516] fce0: ffff8006adb7fea0 ffff20000808aad4 0000000000000009
0000000001359a30
[ 758.086313] fd00: ffffffffffffffff 0000ffffa287c880 0000000080000000
0000000000000015
[ 758.094107] fd20: 0000000000000120 0000000000000062 ffff200008cc5000
ffff8006adb7c000
[ 758.101903] fd40: ffff20000830a4e8 ffff2000082d97fc 0000000000000000
ffff2000084d74b0
[ 758.109699] fd60: ffff8006adb7fd90 ffff2000082aa0cc ffff8006b217cf00
ffff8006d5878fc8
[ 758.117495] fd80: ffff8006adb7fd90 ffff20000830ae18 0000000000000000
ffff2000082aa54c
[ 758.125290] fda0: 0000000041b58ab3 ffff200009244a38 ffff200008089f40
ffff2000081920b4
[ 758.133083] fdc0: 0000000000000000 ffff200008083730 0000000000000000
0000000001359a30
[ 758.140880] fde0: 0000000000000009 0000ffff00000000 0000000000000000
0000000000000015
[ 758.148677] fe00: 0000000000000120 0000000000000062 ffff200008cc5000
ffff8006adb7c000
[ 758.156472] fe20: 0000000041b58ab3 ffff20000924d370 ffff200008191f80
00000000013379f8
[ 758.164267] fe40: 1471ac4018a24538 0000ffffa287d77c 0000000080000000
0000000000000015
[ 758.172062] fe60: 0000000041b58ab3 ffff2000092545e0 ffff2000082ac160
0000000001359a30
[ 758.179857] fe80: 0000000057ce7428 0000000018eab538 0000000080000000
0000000020000145
[ 758.187650] fea0: 0000000000000000 ffff200008083624 0000000000000000
0000000001359a30
[ 758.195445] fec0: 0000000001359a30 0000000000000189 0000000000000000
0000ffff464db5a8
[ 758.203240] fee0: 0000000000000000 00000000ffffffff 0000000000000000
0000000000000000
[ 758.211035] ff00: 0000000000000062 003b9aca00000000 0000000057ce741e
00000000000660f3
[ 758.218829] ff20: 0000000000000018 00000003e8000000 0018b4b8057f6733
000035ff446e3784
[ 758.226623] ff40: 0000000000b11be8 0000ffffa287ca00 0000000000000001
0000ffff464db5a8
[ 758.234418] ff60: 0000000001359a30 0000000000000000 0000ffff464db530
0000000000000002
[ 758.242212] ff80: 0000000000000001 0000ffff464dbe30 0000000000000000
0000000000800000
[ 758.250007] ffa0: 0000ffff464dc520 0000ffff464db4c0 0000ffffa287c854
0000ffff464db4c0
[ 758.257802] ffc0: 0000ffffa287c87c 0000000080000000 0000000001359a30
ffffffffffffffff
[ 758.265596] ffe0: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 758.273388] Call trace:
[ 758.275825] Exception stack(0xffff8006adb7f680 to 0xffff8006adb7f7b0)
[ 758.282238] f680: 0000000004661e00 0001000000000000 ffff8006adb7f8b0
ffff20000809dbdc
[ 758.290033] f6a0: 0000000020000145 0000000000000025 0000000000000000
ffff80069cce4480
[ 758.297828] f6c0: 0000000041b58ab3 ffff200009244678 ffff200008081398
ffff200008145104
[ 758.305623] f6e0: ffff8006adb7f750 ffff2000081661e0 ffff8006adb7f7a0
ffff200008cae5a4
[ 758.313417] f700: ffff20000a7feb10 ffff20000a7feb90 ffff20000a7feb98
ffff20000a7feb80
[ 758.321212] f720: ffff20000a7feb88 ffff20000a7feb70 ffff20000a7feb78
ffff20000a7feb10
[ 758.329006] f740: ffff8006adb7f750 ffff200008141efc ffff8006adb7f790
ffff200008142210
[ 758.336801] f760: ffff20000a7feb10 ffff20000a7feb90 ffff20000a7feb98
ffff20000a7feb80
[ 758.344596] f780: ffff800661e00000 ffff800662000000 0000000000000040
000000000000003f
[ 758.352389] f7a0: 0000000000000000 0000000000000003
[ 758.357249] [<ffff20000809dbdc>] __flush_dcache_area+0x1c/0x40
[ 758.363059] [<ffff2000080b6748>] unmap_stage2_range+0x458/0x5f0
[ 758.368954] [<ffff2000080b708c>] kvm_free_stage2_pgd+0x34/0x60
[ 758.374761] [<ffff2000080b2280>] kvm_arch_destroy_vm+0x20/0x68
[ 758.380570] [<ffff2000080aa330>] kvm_put_kvm+0x210/0x358
[ 758.385860] [<ffff2000080aa524>] kvm_vm_release+0x2c/0x40
[ 758.391239] [<ffff2000082ad234>] __fput+0x114/0x2e8
[ 758.396096] [<ffff2000082ad46c>] ____fput+0xc/0x18
[ 758.400869] [<ffff200008104658>] task_work_run+0x108/0x138
[ 758.406332] [<ffff2000080dc8ec>] do_exit+0x48c/0x10e8
[ 758.411363] [<ffff2000080dd5fc>] do_group_exit+0x6c/0x130
[ 758.416739] [<ffff2000080ed924>] get_signal+0x284/0xa18
[ 758.421943] [<ffff20000808a098>] do_signal+0x158/0x860
[ 758.427060] [<ffff20000808aad4>] do_notify_resume+0x6c/0x88
[ 758.432608] [<ffff200008083624>] work_pending+0x10/0x14
[ 758.437812] Code: 9ac32042 8b010001 d1000443 8a230000 (d50b7e20)
[ 758.444093] ---[ end trace cdfa1c3f20ed57a1 ]---
[ 758.448709] Fixing recursive fault but reboot is needed!
[ 770.500031] xgene-enet 1f610000.ethernet eth3: Link is Up - 10Gbps
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