Chrome OS Version: 8120.0.0
Chrome OS Platform: oak-rev5

Steps To Reproduce:
(1) echo function_graph > /sys/kernel/debug/tracing/current_tracer
(2)
(3)

Expected Result:
No system reboot.

Actual Result:
System reboot.

How frequently does this problem reproduce? (Always, sometimes, hard to
reproduce?)

Always (if no functions specified in /sys/kernel/debug/tracing/set_graph_function)

What is the impact to the user, and is there a workaround? If so, what is
it?

Remember to select some functions to trace, first.


Please provide any additional information below. Attach a screen shot or
log if possible.


[  270.978447] Unable to handle kernel NULL pointer dereference at virtual address 00000060
[  270.978605] pgd = ffffffc001e8e000
[  270.978731] [00000060] *pgd=00000000b7507003, *pud=00000000b7507003, *pmd=00000000b7508003, *pte=0060000010221707
[  270.979264] Internal error: Oops: 96000005 [#1] PREEMPT SMP
[  270.979288] Modules linked in: rfcomm i2c_dev uinput mwifiex_sdio mwifiex btmrvl_sdio btmrvl bluetooth zram fuse cfg80211 nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables r8152 mii uvcvideo videobuf2_vmalloc joydev snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device ppp_async ppp_generic slhc tun
[  270.979781] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.18.0 #378
[  270.979803] Hardware name: Mediatek Oak rev5 board (DT)
[  270.979825] task: ffffffc001060c60 ti: ffffffc001054000 task.ti: ffffffc001054000
[  270.979856] PC is at cpuidle_enter+0x20/0x40
[  270.979880] LR is at cpuidle_enter+0x20/0x40
[  270.979901] pc : [<ffffffc0006f0d94>] lr : [<ffffffc0006f0d94>] pstate: 600001c5
[  270.979922] sp : ffffffc001057f30
[  270.979942] x29: 0000000000000040 x28: 0000000000000002 
[  270.979991] x27: ffffffc001071698 x26: ffffffc0008a167c 
[  270.980040] x25: ffffffc001057f80 x24: 0000000000000001 
[  270.980090] x23: ffffffc078125c00 [  270.980099] Unable to handle kernel NULL pointer dereference at virtual address 00000060
[  270.980107] pgd = ffffffc001e8e000
[  270.980113] [00000060] *pgd=00000000b7507003, *pud=00000000b7507003, *pmd=00000000b7508003, *pte=0060000010221707

[  270.980177] x22: cb88537fdc8cb000 
[  270.980221] x21: ffffffc001054000 x20: ffffffc000212300 
[  270.980271] x19: ffffffc001057f10 x18: 0000000000000000 
[  270.980319] x17: 0000000000000000 x16: 0000000000000000 
[  270.980368] x15: 0000000000000000 x14: 0000000000000000 
[  270.980417] x13: 0000000000000000 x12: 0000000034d5d91d 
[  270.980466] x11: 0000000000000000 x10: 0000000000000000 
[  270.980515] x9 : ffffffc000204000 x8 : 00000032b5193519 
[  270.980564] x7 : 0000000041e8e000 x6 : ffffffc001077df0 
[  270.980613] x5 : 00000000000006f8 x4 : 000000007ee12000 
[  270.980662] x3 : ffffffffffffffa1 x2 : cb88537fdc8cb000 
[  270.980710] x1 : cb88537fdc8cb000 x0 : ffffffffffffffa1 
[  270.980761] 
[  270.980761] PC: 0xffffffc0006f0d14:
[  270.980782] 0d14  17ffffdf 2a1403e0 f94023f9 a94153f3 a9425bf5 a94363f7 a8c57bfd d65f03c0
[  270.980937] 0d34  a9bd7bfd 910003fd f9000bf3 aa0003f3 aa1e03e0 f90017a1 97ec8551 9000bb60
[  270.981092] 0d54  f94017a1 f9444400 f9401c02 aa1303e0 d63f0040 f9400bf3 a8c37bfd d65f03c0
[  270.981246] 0d74  a9bd7bfd 910003fd f9000bf3 aa0003f3 aa1e03e0 f90013a1 f90017a2 97ec8540
[  270.981400] 0d94  f94013a1 f94017a2 aa0103e0 aa1303e1 97ffff68 f9400bf3 a8c37bfd d65f03c0
[  270.981555] 0db4  a9bd7bfd 910003fd f9000bf3 aa0003f3 aa1e03e0 f90017a1 97ec8531 9000bb60
[  270.981709] 0dd4  f9444400 f9402002 b4000082 f94017a1 aa1303e0 d63f0040 f9400bf3 a8c37bfd
[  270.981863] 0df4  d65f03c0 a9bf7bfd 910003fd aa1e03e0 97ec8523 9000bb60 9121e001 b9487800
[  270.982019] 
[  270.982019] LR: 0xffffffc0006f0d14:
[  270.982040] 0d14  17ffffdf 2a1403e0 f94023f9 a94153f3 a9425bf5 a94363f7 a8c57bfd d65f03c0
[  270.982195] 0d34  a9bd7bfd 910003fd f9000bf3 aa0003f3 aa1e03e0 f90017a1 97ec8551 9000bb60
[  270.982349] 0d54  f94017a1 f9444400 f9401c02 aa1303e0 d63f0040 f9400bf3 a8c37bfd d65f03c0
[  270.982503] 0d74  a9bd7bfd 910003fd f9000bf3 aa0003f3 aa1e03e0 f90013a1 f90017a2 97ec8540
[  270.982657] 0d94  f94013a1 f94017a2 aa0103e0 aa1303e1 97ffff68 f9400bf3 a8c37bfd d65f03c0
[  270.982812] 0db4  a9bd7bfd 910003fd f9000bf3 aa0003f3 aa1e03e0 f90017a1 97ec8531 9000bb60
[  270.982966] 0dd4  f9444400 f9402002 b4000082 f94017a1 aa1303e0 d63f0040 f9400bf3 a8c37bfd
[  270.983120] 0df4  d65f03c0 a9bf7bfd 910003fd aa1e03e0 97ec8523 9000bb60 9121e001 b9487800
[  270.983276] 
[  270.983276] SP: 0xffffffc001057eb0:
[  270.983298] 7eb0  00212300 ffffffc0 01054000 ffffffc0 dc8cb000 cb88537f 78125c00 ffffffc0
[  270.983452] 7ed0  00000001 00000000 01057f80 ffffffc0 008a167c ffffffc0 01071698 ffffffc0
[  270.983607] 7ef0  00000002 00000000 00000040 00000000 006f0d94 ffffffc0 01057f30 ffffffc0
[  270.983761] 7f10  006f0d94 ffffffc0 600001c5 00000000 01071698 ffffffc0 00000002 00000000
[  270.983915] 7f30  01100000 ffffffc0 01000858 ffffffc0 01100000 ffffffc0 7fe98080 ffffffc0
[  270.984069] 7f50  41e8c000 00000000 41e8e000 00000000 00081230 ffffffc0 008a6128 ffffffc0
[  270.984224] 7f70  01057f80 ffffffc0 00000001 00000000 01057fa0 ffffffc0 00e00a20 ffffffc0
[  270.984378] 7f90  01e06000 ffffffc0 00000000 00000000 00000000 00000000 40200780 00000000
[  270.984535] 
[  270.984535] X6: 0xffffffc001077d70:
[  270.984557] 7d70  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.984711] 7d90  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.984865] 7db0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.985019] 7dd0  00000000 00000000 002d66fc ffffffc0 002d66fc ffffffc0 002c25d4 ffffffc0
[  270.985173] 7df0  01077df0 ffffffc0 01077df0 ffffffc0 002122c0 ffffffc0 01077870 ffffffc0
[  270.985327] 7e10  00000001 00000000 00100010 dead4ead ffffffff 00000000 ffffffff ffffffff
[  270.985481] 7e30  00000000 00000000 00000000 00000000 00000000 00000000 00c2c0a8 ffffffc0
[  270.985635] 7e50  01077e50 ffffffc0 01077e50 ffffffc0 00000000 00000000 00000000 00000000
[  270.985791] 
[  270.985791] X9: 0xffffffc000203f80:
[  270.985813] 3f80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.985967] 3fa0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.986121] 3fc0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.986275] 3fe0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.986429] 4000  14000279 d503201f d503201f d503201f d503201f d503201f d503201f d503201f
[  270.986584] 4020  d503201f d503201f d503201f d503201f d503201f d503201f d503201f d503201f
[  270.986738] 4040  d503201f d503201f d503201f d503201f d503201f d503201f d503201f d503201f
[  270.986893] 4060  d503201f d503201f d503201f d503201f d503201f d503201f d503201f d503201f
[  270.987050] 
[  270.987050] X19: 0xffffffc001057e90:
[  270.987072] 7e90  00000000 00000000 00000000 00000000 00000000 00000000 01057f10 ffffffc0
[  270.987226] 7eb0  00212300 ffffffc0 01054000 ffffffc0 dc8cb000 cb88537f 78125c00 ffffffc0
[  270.987381] 7ed0  00000001 00000000 01057f80 ffffffc0 008a167c ffffffc0 01071698 ffffffc0
[  270.987535] 7ef0  00000002 00000000 00000040 00000000 006f0d94 ffffffc0 01057f30 ffffffc0
[  270.987689] 7f10  006f0d94 ffffffc0 600001c5 00000000 01071698 ffffffc0 00000002 00000000
[  270.987844] 7f30  01100000 ffffffc0 01000858 ffffffc0 01100000 ffffffc0 7fe98080 ffffffc0
[  270.987998] 7f50  41e8c000 00000000 41e8e000 00000000 00081230 ffffffc0 008a6128 ffffffc0
[  270.988152] 7f70  01057f80 ffffffc0 00000001 00000000 01057fa0 ffffffc0 00e00a20 ffffffc0
[  270.988308] 
[  270.988308] X20: 0xffffffc000212280:
[  270.988329] 2280  d65f03c0 d503201f d503201f d503201f a9bf7bfd 910003fd d10013c0 f94003a1
[  270.988484] 22a0  f9400421 d1001021 9402c0cb 94000009 a8c17bfd d65f03c0 d503201f d503201f
[  270.988638] 22c0  d65f03c0 d503201f d503201f d503201f f94003a0 91002000 f94007a1 d1001021
[  270.988792] 22e0  f94003a2 f9400042 97ffff8a a8c17bfd d65f03c0 d503201f d503201f d503201f
[  270.988947] 2300  f81f0fe0 aa1d03e0 94031088 aa0003fe f84107e0 d65f03c0 d503201f d503201f
[  270.989101] 2320  a9bd7bfd 910003fd a90153f3 f90013f5 2a0003f5 aa1e03e0 aa0103f4 aa0203f3
[  270.989255] 2340  97ffffd4 71000ebf 540001e8 d0003f60 912ac000 38754800 10000061 8b208820
[  270.989409] 2360  d61f0000 aa1303e0 1400000c cb140260 1400000a 9274ce73 9274ce80 cb000260
[  270.989565] 
[  270.989565] X21: 0xffffffc001053f80:
[  270.989587] 3f80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.989741] 3fa0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.989895] 3fc0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.990049] 3fe0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.990202] 4000  00000000 00000000 ffffffff ffffffff 01060c60 ffffffc0 01068158 ffffffc0
[  270.990357] 4020  00233b98 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000
[  270.990511] 4040  00000000 00000000 00000000 00000000 00000003 00000000 00000119 00000000
[  270.990665] 4060  01064000 ffffffc0 00000183 00000000 00210000 ffffffc0 57ac6e9d 00000000
[  270.990821] 
[  270.990821] X23: 0xffffffc078125b80:
[  270.990843] 5b80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.990997] 5ba0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.991151] 5bc0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.991305] 5be0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.991459] 5c00  00000003 00000000 000005ab 00000002 00000000 00000000 00013763 00000000
[  270.991613] 5c20  04c1aac3 00000000 00000000 00000000 000114dc 00000000 0950b3a7 00000000
[  270.991767] 5c40  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.991921] 5c60  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  270.992077] 
[  270.992077] X25: 0xffffffc001057f00:
[  270.992098] 7f00  006f0d94 ffffffc0 01057f30 ffffffc0 006f0d94 ffffffc0 600001c5 00000000
[  270.992252] 7f20  01071698 ffffffc0 00000002 00000000 01100000 ffffffc0 01000858 ffffffc0
[  270.992406] 7f40  01100000 ffffffc0 7fe98080 ffffffc0 41e8c000 00000000 41e8e000 00000000
[  270.992560] 7f60  00081230 ffffffc0 008a6128 ffffffc0 01057f80 ffffffc0 00000001 00000000
[  270.992715] 7f80  01057fa0 ffffffc0 00e00a20 ffffffc0 01e06000 ffffffc0 00000000 00000000
[  270.992869] 7fa0  00000000 00000000 40200780 00000000 40080000 00000000 00000e12 00000000
[  270.993022] 7fc0  5ff00000 00000000 410fd032 00000000 41063018 00000000 40000000 00000000
[  270.993176] 7fe0  01000858 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000
[  270.993332] 
[  270.993332] X26: 0xffffffc0008a15fc:
[  270.993353] 15fc  97e78617 52800001 90000006 2a0103e4 52800043 d2800005 9116c0c6 2a0103e2
[  270.993508] 161c  aa1303e0 97e73b9f d0003e41 2a1403e0 91246021 97e68082 90004301 90000002
[  270.993662] 163c  9116c042 f9033020 52800021 aa1303e0 97e73ca8 97e786b6 f0003ae0 91000000
[  270.993816] 165c  97e710b7 910003e0 9272c400 f9400800 97e6c20f 940012a4 52800020 97e71134
[  270.993970] 167c  a94153f3 a8c27bfd d65f03c0 a9be7bfd 910003fd a90153f3 aa1e03e0 f00042f3
[  270.994125] 169c  91000274 97e5c2fc 94157ce9 97e6985b 97e5e249 97e5e5e0 52800020 b9004e80
[  270.994279] 16bc  97ea8bfe f9400a80 b4000100 97e57c66 2a0003e2 34000440 90001be0 f9400a81
[  270.994433] 16dc  91078800 94000861 91000273 f9400660 b4000100 97e57c5c 2a0003e2 34000300
[  270.994589] 
[  270.994589] X27: 0xffffffc001071618:
[  270.994611] 1618  01071610 ffffffc0 00000000 00000000 00000000 00000000 010715d0 ffffffc0
[  270.994765] 1638  00000000 00000000 00000000 00000000 00000000 00000000 00c28334 ffffffc0
[  270.994919] 1658  01073328 ffffffc0 010acb50 ffffffc0 00000000 00000000 00282c80 ffffffc0
[  270.995073] 1678  00000000 00000000 00282ed4 ffffffc0 010771e0 ffffffc0 00000000 00000000
[  270.995228] 1698  01ddc4d8 ffffffc0 0131d6e0 ffffffc0 00000000 00000000 00c284b5 ffffffc0
[  270.995382] 16b8  0000003c 00000000 01ddc4c0 ffffffc0 0132fad0 ffffffc0 00000000 00000000
[  270.995536] 16d8  00c28483 ffffffc0 01ddc4c8 ffffffc0 01369ca0 ffffffc0 00000000 00000000
[  270.995691] 16f8  00c28490 ffffffc0 01ddc4d0 ffffffc0 01353530 ffffffc0 00000000 00000000
[  270.995846] 
[  270.995867] Process swapper/0 (pid: 0, stack limit = 0xffffffc001054078)
[  270.995889] Stack: (0xffffffc001057f30 to 0xffffffc001058000)
[  270.995912] 7f20:                                     01100000 ffffffc0 01000858 ffffffc0
[  270.995936] 7f40: 01100000 ffffffc0 7fe98080 ffffffc0 41e8c000 00000000 41e8e000 00000000
[  270.995960] 7f60: 00081230 ffffffc0 008a6128 ffffffc0 01057f80 ffffffc0 00000001 00000000
[  270.995984] 7f80: 01057fa0 ffffffc0 00e00a20 ffffffc0 01e06000 ffffffc0 00000000 00000000
[  270.996007] 7fa0: 00000000 00000000 40200780 00000000 40080000 00000000 00000e12 00000000
[  270.996031] 7fc0: 5ff00000 00000000 410fd032 00000000 41063018 00000000 40000000 00000000
[  270.996055] 7fe0: 01000858 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000
[  270.996076] Call trace:
[  270.996099] Code: aa1e03e0 f90013a1 f90017a2 97ec8540 (f94013a1) 
[  270.996130] Internal error: Oops: 96000005 [#2] PREEMPT SMP
[  270.996156] Modules linked in: rfcomm i2c_dev uinput mwifiex_sdio mwifiex btmrvl_sdio btmrvl bluetooth zram fuse cfg80211 nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables r8152 mii uvcvideo videobuf2_vmalloc[  270.996461] ---[ end trace 4e3c75c73843e036 ]---
 ffffffc0 01077870 ffffffc0
[  271.005959] 7e10  00000001 00000000
[  271.005995] Kernel panic - not syncing: Fatal exception
[  271.006019] CPU3: stopping
[  271.006044] CPU: 3 PID: 12063 Comm: chrome Tainted: G      D        3.18.0 #378
[  271.006060] Hardware name: Mediatek Oak rev5 board (DT)
[  271.006078] Call trace:
[  271.006115] [<ffffffc000209ed8>] dump_backtrace+0x0/0x140
[  271.006142] [<ffffffc00020a034>] show_stack+0x1c/0x28
[  271.006170] [<ffffffc0008a4640>] dump_stack+0x80/0xc4
[  271.006194] [<ffffffc00021371c>] handle_IPI+0x18c/0x2d4
[  271.006217] [<ffffffc0002004f4>] gic_handle_irq+0x70/0x88
[  271.006235] Exception stack(0xffffffc054e87970 to 0xffffffc054e87a90)
[  271.006255] 7960:                                     000200da 00000000 01d25f58 ffffffbe
[  271.006276] 7980: 54e87ab0 ffffffc0 002fb098 ffffffc0 01d25f58 ffffffbe dc8cb000 cb88537f
[  271.006299] 79a0: dc8cb000 cb88537f 01d25f90 ffffffbe 00000001 00000000 00c2fd0f ffffffc0
[  271.006320] 79c0: 00c2fd20 ffffffc0 00c2fd31 ffffffc0 0030da24 ffffffc0 5ef088bd 00000000
[  271.006341] 79e0: f7977024 00000000 ff999cc0 00000000 3288cf9b 00000000 ff999cb8 00000000
[  271.006364]  00100010
[  271.006366] 7a00: 3b6738f4 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.006387] 7a20: 00000000 00000000 000200da 00000000 01d25f58 ffffffbe 00000002 00000000
[  271.006407] 7a40: 00000000 00000000 01e067e0 ffffffc0 00000000 00000000 00000002 00000000
[  271.006428] 7a60: 00000000 00000000 00000000 00000000 00000ca0 00000000 54e87ad0 ffffffc0
[  271.006447] 7a80: 002fab14 ffffffc0 54e87ab0 ffffffc0
[  271.006471] [<ffffffc000204da8>] el1_irq+0x68/0xe0
[  271.006497] [<ffffffc00031f66c>] handle_mm_fault+0x54c/0x90c
[  271.006520] [<ffffffc000219ca4>] do_page_fault+0x144/0x350
[  271.006542] [<ffffffc0002002a4>] do_mem_abort+0x5c/0xd4
[  271.006559] Exception stack(0xffffffc054e87e10 to 0xffffffc054e87f30)
[  271.006577] 7e00:                                     00400800 00000000 00000000 00000000
[  271.006599] 7e20: ffffffff ffffffff 3522e32c 00000000 800e0010 00000000 002122ec ffffffc0
[  271.006621] 7e40: 00400800 00000000 54e87ed0 ffffffc0 ffffffff ffffffff 002122ac ffffffc0
[  271.006642] 7e60: 00000000 00000000 00208dac ffffffc0 ffffffff ffffffff 00208dac ffffffc0
[  271.006663] 7e80: 00000000 00000000 dc8cb000 cb88537f 54e87ea0 ffffffc0 00208db0 ffffffc0
[  271.006686]  dead4ead
[  271.006688] 7ea0: 00000000 00000000 002054dc ffffffc0 00400800 00000000 00000000 00000000
[  271.006708] 7ec0: ffffffff ffffffff dc8cb000 cb88537f 35f0818d 00000000 5adac2e9 00000000
[  271.006729] 7ee0: f7977878 00000000 3285bfe9 00000000 3b6738e0 00000000 000000c9 00000000
[  271.006750] 7f00: 3856ab29 00000000 5adb0c71 00000000 4cb183ec 00000000 5ef088bd 00000000
[  271.006767] 7f20: f7977024 00000000 ff999cc0 00000000
[  271.006788] CPU2: stopping
[  271.006812] CPU: 2 PID: 621 Comm: rs:main Q:Reg Tainted: G      D        3.18.0 #378
[  271.006827] Hardware name: Mediatek Oak rev5 board (DT)
[  271.006845] Call trace:
[  271.006877] [<ffffffc000209ed8>] dump_backtrace+0x0/0x140
[  271.006903] [<ffffffc00020a034>] show_stack+0x1c/0x28
[  271.006931] [<ffffffc0008a4640>] dump_stack+0x80/0xc4
[  271.006956] [<ffffffc00021371c>] handle_IPI+0x18c/0x2d4
[  271.006979] [<ffffffc0002004f4>] gic_handle_irq+0x70/0x88
[  271.006996] Exception stack(0xffffffc073313720 to 0xffffffc073313840)
[  271.007023]  ffffffff
[  271.007025] 3720: 00000000 00000000 00000080 00000000 73313860 ffffffc0 002282d8 ffffffc0
[  271.007048] 3740: 002282d4 ffffffc0 00000000 00000000 00000000 00000000 73313860 ffffffc0
[  271.007069] 3760: 00000001 00000000 00227ee4 ffffffc0 01077df0 ffffffc0 00000000 00000000
[  271.007092]  00000000
[  271.007094] 3780: 00227ee4 ffffffc0 0000000f 00000000 00308400 00000000 09d5a61a 00000000
[  271.007116] 37a0: 00000004 00000000 00a02ec8 ffffffc0 00000000 00000000 00000000 00000000
[  271.007136] 37c0: 00340c28 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000
[  271.007158] 37e0: 00000080 00000000 00000002 00000000 00000282 00000000 73310000 ffffffc0
[  271.007179] 3800: 01e8a000 ffffffc0 7331e680 ffffffc0 0000000a 00000000 0105a000 ffffffc0
[  271.007201] 3820: 00c35004 ffffffc0 73313860 ffffffc0 002282d4 ffffffc0 73313860 ffffffc0
[  271.007228]  ffffffff
[  271.007230] [<ffffffc000204da8>] el1_irq+0x68/0xe0
[  271.007254] [<ffffffc0002288fc>] irq_exit+0x78/0xd8
[  271.007278] [<ffffffc000213754>] handle_IPI+0x1c4/0x2d4
[  271.007300] [<ffffffc0002004f4>] gic_handle_irq+0x70/0x88
[  271.007317] Exception stack(0xffffffc073313990 to 0xffffffc073313ab0)
[  271.007338] 3980:                                     00000800 00000000 01077c68 ffffffc0
[  271.007359] 39a0: 73313ad0 ffffffc0 002c26a8 ffffffc0 00000001 00000000 dc8cb000 cb88537f
[  271.007380] 39c0: dc8cb000 cb88537f 7331e680 ffffffc0 002122c0 ffffffc0 00273480 ffffffc0
[  271.007402] 39e0: 01077df0 ffffffc0 00000000 00000000 00273480 ffffffc0 55461020 ffffffc0
[  271.007423] 3a00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.007444] 3a20: 00000000 00000000 00000000 00000000 00340c28 ffffffc0 00000000 00000000
[  271.007467]  ffffffff
[  271.007469] 3a40: 00000000 00000000 00000800 00000000 01077c68 ffffffc0 01077870 ffffffc0
[  271.007490] 3a60: 003591e8 ffffffc0 0034f7fc ffffffc0 fefefeff fefefefe 73313d50 ffffffc0
[  271.007511] 3a80: 73310000 ffffffc0 73313d30 ffffffc0 00c35004 ffffffc0 73313ad0 ffffffc0
[  271.007529] 3aa0: 002c2670 ffffffc0 73313ad0 ffffffc0
[  271.007552] [<ffffffc000204da8>] el1_irq+0x68/0xe0
[  271.007575] [<ffffffc0002122a8>] ftrace_call+0x0/0x4
[  271.007600] [<ffffffc0003591e8>] dput+0x18/0x1b0
[  271.007626] [<ffffffc00034f7fc>] link_path_walk+0x7b4/0x824
[  271.007651] [<ffffffc00034f8e8>] path_lookupat+0x7c/0x744
[  271.007676] [<ffffffc0003503c0>] filename_lookup.isra.22+0x38/0x84
[  271.007699] [<ffffffc0003527f8>] user_path_at_empty+0x7c/0xc4
[  271.007720] [<ffffffc000352878>] user_path_at+0x38/0x48
[  271.007746] [<ffffffc000340af0>] SyS_faccessat+0xf0/0x228
[  271.007769] [<ffffffc000340c50>] SyS_access+0x28/0x38
[  271.007789] 
[  271.007808] 7e30  00000000 00000000 00000000 00000000 00000000 00000000 00c2c0a8 ffffffc0
[  271.007963] 7e50  01077e50 ffffffc0 01077e50 ffffffc0 00000000 00000000 00000000 00000000
[  271.008119] 
[  271.008119] X9: 0xffffffc000203f80:
[  271.008141] 3f80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.008296] 3fa0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.008450] 3fc0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.008605] 3fe0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.008759] 4000  14000279 d503201f d503201f d503201f d503201f d503201f d503201f d503201f
[  271.008914] 4020  d503201f d503201f d503201f d503201f d503201f d503201f d503201f d503201f
[  271.009069] 4040  d503201f d503201f d503201f d503201f d503201f d503201f d503201f d503201f
[  271.009224] 4060  d503201f d503201f d503201f d503201f d503201f d503201f d503201f d503201f
[  271.009382] 
[  271.009382] X19: 0xffffffc077663ee0:
[  271.009404] 3ee0  00000000 00000000 00000000 00000000 00000000 00000000 77663f60 ffffffc0
[  271.009559] 3f00  00212300 ffffffc0 77660000 ffffffc0 dc8cb000 cb88537f 78125e00 ffffffc0
[  271.009714] 3f20  00000001 00000000 77663fd0 ffffffc0 002131a4 ffffffc0 00000001 00000000
[  271.009869] 3f40  00000e12 00000000 00000040 00000000 006f0d94 ffffffc0 77663f80 ffffffc0
[  271.010023] 3f60  006f0d94 ffffffc0 600001c5 00000000 00000001 00000000 00000e12 00000000
[  271.010178] 3f80  01100620 ffffffc0 410fd032 00000000 41063018 00000000 40000000 00000000
[  271.010333] 3fa0  41e8c000 00000000 41e8e000 00000000 00200770 ffffffc0 00000e12 00000000
[  271.010488] 3fc0  77663fd0 ffffffc0 00000001 00000000 00000000 00000000 40200760 00000000
[  271.010644] 
[  271.010644] X20: 0xffffffc000212280:
[  271.010665] 2280  d65f03c0 d503201f d503201f d503201f a9bf7bfd 910003fd d10013c0 f94003a1
[  271.010820] 22a0  f9400421 d1001021 9402c0cb 94000009 a8c17bfd d65f03c0 d503201f d503201f
[  271.010975] 22c0  d65f03c0 d503201f d503201f d503201f f94003a0 91002000 f94007a1 d1001021
[  271.011130] 22e0  f94003a2 f9400042 97ffff8a a8c17bfd d65f03c0 d503201f d503201f d503201f
[  271.011284] 2300  f81f0fe0 aa1d03e0 94031088 aa0003fe f84107e0 d65f03c0 d503201f d503201f
[  271.011439] 2320  a9bd7bfd 910003fd a90153f3 f90013f5 2a0003f5 aa1e03e0 aa0103f4 aa0203f3
[  271.011594] 2340  97ffffd4 71000ebf 540001e8 d0003f60 912ac000 38754800 10000061 8b208820
[  271.011748] 2360  d61f0000 aa1303e0 1400000c cb140260 1400000a 9274ce73 9274ce80 cb000260
[  271.011905] 
[  271.011905] X21: 0xffffffc07765ff80:
[  271.011926] ff80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.012081] ffa0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.012236] ffc0  00000000 00000000 00000000 00000000 00000000 00000000 00000005 00000000
[  271.012390] ffe0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.012545] 0000  00000002 00000000 ffffffff ffffffff 7764e680 ffffffc0 01068158 ffffffc0
[  271.012699] 0020  00233b98 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000
[  271.012854] 0040  00000000 00000000 00000000 00000000 00000003 00000001 00000119 00000000
[  271.013008] 0060  01064000 ffffffc0 00000183 00000000 00210000 ffffffc0 57ac6e9d 00000000
[  271.013165] 
[  271.013165] X23: 0xffffffc078125d80:
[  271.013187] 5d80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.013341] 5da0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.013496] 5dc0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.013650] 5de0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.013805] 5e00  00000003 00000001 00000f89 00000002 00000000 00000000 0000a454 00000000
[  271.013959] 5e20  0099615b 00000000 00000000 00000000 00007492 00000000 0de205ce 00000000
[  271.014114] 5e40  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.014269] 5e60  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.014425] 
[  271.014425] X25: 0xffffffc077663f50:
[  271.014446] 3f50  006f0d94 ffffffc0 77663f80 ffffffc0 006f0d94 ffffffc0 600001c5 00000000
[  271.014601] 3f70  00000001 00000000 00000e12 00000000 01100620 ffffffc0 410fd032 00000000
[  271.014756] 3f90  41063018 00000000 40000000 00000000 41e8c000 00000000 41e8e000 00000000
[  271.014910] 3fb0  00200770 ffffffc0 00000e12 00000000 77663fd0 ffffffc0 00000001 00000000
[  271.015065] 3fd0  00000000 00000000 40200760 00000000 00000000 00000000 00000000 00000000
[  271.015220] 3ff0  00000000 00000000 00000000 00000000 00000000 00000000 ffffffff ffffffff
[  271.015375] 4010  77668000 ffffffc0 01068158 ffffffc0 00233b98 ffffffc0 00000000 00000000
[  271.015529] 4030  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.015686] 
[  271.015686] X26: 0xffffffc000213124:
[  271.015707] 3124  d5033fdf d5033a9f d508831f d5033b9f d5033fdf b9405040 11000400 b9005040
[  271.015863] 3144  94016071 b0007760 91054000 f8735800 f9401000 b4000040 d63f0000 97ffeb6e
[  271.016018] 3164  2a1303e0 9400462a 2a1303e0 940002f4 2a1303e0 52800021 94004665 d0007280
[  271.016173] 3184  91092000 940149ec d50348ff 94016bc4 d50342ff d50344ff 52800020 94014a6a
[  271.016328] 31a4  f9400bf3 a8c27bfd d65f03c0 a9be7bfd 910003fd f9000bf3 aa1e03e0 97fffc34
[  271.016482] 31c4  910003e0 9272c400 b9405413 b0007760 91054000 f8735801 12800bc0 b4000201
[  271.016637] 31e4  f9401822 b40001c2 f9401421 b5000121 2a1303e0 52800001 94004645 97ffc997
[  271.016792] 3204  2a1303e0 940044f7 52800000 14000004 2a1303e0 d63f0020 34fffec0 f9400bf3
[  271.016948] 
[  271.016969] Process swapper/1 (pid: 0, stack limit = 0xffffffc077660078)
[  271.016991] Stack: (0xffffffc077663f80 to 0xffffffc077664000)
[  271.017015] 3f80: 01100620 ffffffc0 410fd032 00000000 41063018 00000000 40000000 00000000
[  271.017038] 3fa0: 41e8c000 00000000 41e8e000 00000000 00200770 ffffffc0 00000e12 00000000
[  271.017062] 3fc0: 77663fd0 ffffffc0 00000001 00000000 00000000 00000000 40200760 00000000
[  271.017085] 3fe0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  271.017106] Call trace:
[  271.017129] Code: aa1e03e0 f90013a1 f90017a2 97ec8540 (f94013a1) 
[  271.017198] CPU1: stopping
[  271.017222] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G      D        3.18.0 #378
[  271.017243] Hardware name: Mediatek Oak rev5 board (DT)
[  271.017264] Call trace:
[  271.017291] [<ffffffc000209ed8>] dump_backtrace+0x0/0x140
[  271.017316] [<ffffffc00020a034>] show_stack+0x1c/0x28
[  271.017342] [<ffffffc0008a4640>] dump_stack+0x80/0xc4
[  271.017367] [<ffffffc00021371c>] handle_IPI+0x18c/0x2d4
[  271.017392] [<ffffffc0002004f4>] gic_handle_irq+0x70/0x88
[  271.017414] Exception stack(0xffffffc0776639d0 to 0xffffffc077663af0)
[  271.017436] 39c0:                                     01065000 ffffffc0 01065000 ffffffc0
[  271.017460] 39e0: 77663b10 ffffffc0 008ab2cc ffffffc0 008ab2c8 ffffffc0 00000000 00000000
[  271.017484] 3a00: 00000000 00000000 77663b10 ffffffc0 00000002 00000000 00273480 ffffffc0
[  271.017508] 3a20: 01077df0 ffffffc0 00279864 ffffffc0 00426690 ffffffc0 7f7f7f7f 7f7f7f7f
[  271.017532] 3a40: 6032302f ff1f2830 7f7f7f7f 7f7f7f7f 01010101 01010101 00000038 00000000
[  271.017556] 3a60: fffffffc 0fffffff 00000000 00000000 00000000 00000000 00000000 00000000
[  271.017580] 3a80: 00000000 00000000 01065000 ffffffc0 01065000 ffffffc0 00c1e54f ffffffc0
[  271.017604] 3aa0: 7764e680 ffffffc0 00000001 00000000 00c200b3 ffffffc0 00000000 00000000
[  271.017627] 3ac0: 96000005 00000000 00000001 00000000 00000e12 00000000 77663b10 ffffffc0
[  271.017650] 3ae0: 008ab2c8 ffffffc0 77663b10 ffffffc0
[  271.017674] [<ffffffc000204da8>] el1_irq+0x68/0xe0
[  271.017698] [<ffffffc00020a18c>] die+0x14c/0x1b4
[  271.017723] [<ffffffc0008a2bf8>] __do_kernel_fault.part.5+0x78/0x8c
[  271.017748] [<ffffffc000219e50>] do_page_fault+0x2f0/0x350
[  271.017772] [<ffffffc000219f0c>] do_translation_fault+0x5c/0xdc
[  271.017796] [<ffffffc0002002a4>] do_mem_abort+0x5c/0xd4
[  271.017817] Exception stack(0xffffffc077663da0 to 0xffffffc077663ec0)
[  271.017841] 3da0: 77663f60 ffffffc0 00212300 ffffffc0 77663f80 ffffffc0 006f0d94 ffffffc0
[  271.017865] 3dc0: 600001c5 00000000 002d6948 ffffffc0 77663e80 ffffffc0 000001c0 00000000
[  271.017889] 3de0: 7759e600 ffffffc0 010f5fb0 ffffffc0 15bd36a3 0000003f 0026b318 ffffffc0
[  271.017913] 3e00: 77663e30 ffffffc0 002d6ac0 ffffffc0 77663e20 ffffffc0 0026b318 ffffffc0
[  271.017936] 3e20: 77663e30 ffffffc0 002d6adc ffffffc0 77663e60 ffffffc0 002d660c ffffffc0
[  271.017960] 3e40: 00216b50 ffffffc0 01100000 ffffffc0 77663e80 ffffffc0 dc8cb000 cb88537f
[  271.017984] 3e60: ffffffa1 ffffffff dc8cb000 cb88537f dc8cb000 cb88537f ffffffa1 ffffffff
[  271.018008] 3e80: 00000001 00000000 00215724 ffffffc0 01077df0 ffffffc0 41e8e000 00000000
[  271.018032] 3ea0: b5193519 00000032 00204000 ffffffc0 00000000 00000000 00000000 00000000