About Linux oops

<1> unable to handle kernel Null Pointer Dereference at virtual address 00000000
PGD = c064c000
[00000000] * PGD = e0010031, * PTE = 00000000, * PPTE = 00000000
Internal error: Oops: 817 [#4]
Modules linked in: rt73 hiwdt protocol NFS lockd SunRPC mmc_block himci mmc_core protocol used hiusb serial numbers hifb FB serial numbers too many serial numbers exceed hi3511_group serial numbers exceed hi3511_base TDE protocol stkmediactl serial numbers exceed hi3511_base gpioi2c hiether mmz
CPU: 0
PC is at _ queue_work + 0x48/0x68
LR is at 0xc03254f0
PC: [<c004a05c>] LR: [<c03254f0>] tainted: P
SP: c046fb10 IP: c042c848 FP: c046fb28
R10: c0323038 R9: c02cdef8 R8: c046fb3c
R7: 60000013 R6: 00000000 R5: c042c840 R4: 00000100
R3: 00000000 R2: 00000001 r1: 00000003 R0: c042c850
Flags: nzcv irqs off fiqs on mode svc_32 segment user
Control: 5317f table: e064c000 DAC: 00000015
Process Init (PID: 1, stack Limit = 0xc046e194)
STACK: (0xc046fb10 to 0xc0470000)
Fb00: c004a0d4 c046e000 00000000 c046fb38
Fb20: c046fb2c c004a0ec c004a024 c046fb70 c046fb3c c0042cf0 c004a0e4 bf1077a0
Fb40: bf1077a0 00000000 00000011 c0322dd0 00000001 c0324884 0000000a c046e000
Fb60: c0322da0 c046fb9c c046fb74 c003ebf0 c0042bfc c046e000 fe140000 00000010
Fb80: c02cdc8c c046fbe0 c046fdb0 c031ce24 c046fbac c046fba0 c003eda0 c003eb90
Fba0: c046fbdc c046fbb0 c0022e10 c003ed6c c003ebf0 c003efe8 ffffffff fe140000
Fbc0: 00000010 0000000b c046e000 c00000d60 c046fc34 c046fbe0 c00219c4 c0022cf4
Fbe0: 00009141 00000000 0000015f 60000013 00000544 c031e484 c031e488 0000000b
Fc00: c046e000 c046fdb0 c0da-d60 c046fc34 c046fc28 c046fc28 c0039804 c0158b8c
Fc20: 20000013 ffffffff c046fc68 c046fc48 c003c278 c00000014 c028abb8 c046e000
Fc40: c046e000 00000001 c046e000 c0da-d60 c046fc7c 60000093 c046fc6c c046fc7c
Fc60: c046fc6c c00270e4 c003bbe8 bf000000 c046fc9c c046fc80 c00297c4 c0026ee8
Fc80: 00000001 00030001 c046fdb0 c0091364 c046fcc0 c046fca0 c00298e0 c0029768
Fca0: e594c000 c0280244 c046e000 c046fdb0 e594c000 c046fd04 c046fcc4 c002b320
Fcc0: c002988c c046fdb0 c046fcd4 c0062614 c00621d8 00000000 00000001 c02ce00c
Fce0: 00000001 c02ce01c e160041e c046fdb0 a0000013 00000007 c046fdac c046fd08
Fd00: c0029c40 c002b0c8 c05df0fc c046e000 c046fd40 c046fd20 c00924d4 c00920ec
FD20: a0000013 c58cc4d0 c046fd88 c05df0fc c046e000 c05df08c 00000002 20000013
Fd40: c02d05d0 00000000 00000002 201700d0 00000002 c02d0954 c046fda0 c046fd68
Fd60: c005c510 c005c0d8 c005ef34 00000000 c044e8a0 000000d0 00000000 c02d05d0
Fd80: 00000000 00000002 000000d0 ffffffff c046fde4 05b6719b c0583d50 c046fe68
Fda0: c046fe24 c046fdb0 c0021980 c0029c14 1273fff c0412860 10931fe 00000000
Fdc0: e160041e c046ff3c 05b6719b c0583d50 c046fe68 c0447005 00000007 c046fe24
Fde0: c046fe28 c046fdf8 c0085aa4 c0091364 a0000013 ffffffff 00000000 00000007
Fe00: c046ff3c c046fe60 c046fe68 c04340c0 fffffeff 00000000 c046fe54 c046fe28
Fe20: c0085aa4 c0091304 c4f2d978 00000007 c044700c c046fe68 c046ff3c c046e000
Fe40: fffffeff 00000000 c046fe9c c046fe58 c0086784 c0085a8c c0060344 00000401
Fe60: c04340c0 c0583d50 05b6719b 00000007 c0447005 c046ff3c c046fea0 00000000
Fe80: c0447000 00000000 fffffeff 00000000 c046fefc c046fea0 c0086e10 c0085df4
Fea0: c0580ee8 c0434180 c0038524 00000000 00000000 00000401 00000001 00000000
Fec0: 00100100 00200200 ffffffea 00000000 00000238 00000072 c0021ee4 c046e000
Fee0: c046ff3c c046e000 00000000 c0447000 c046ff1c c046ff00 c0086fdc c0086d74
Ff00: c0447000 c046ff3c c0447000 c046ff3c c046ff38 c046ff20 c00873b4 c0086f24
Ff20: c046e000 00000000 00000006 c046ffa4 c046ff3c c0075c00 c0087388 c0583d50
Ff40: c04340c0 c00000024 00000000 00000000 00000401 00000001 00000000
Ff60: 00200200 ffffffea 00000000 00000238 00000072 c0021ee4 c046e000 000bd1c0
Ff80: 00000000 000bd2f0 00000021 c0021ee4 c046e000 0009d09c 00000000 c046ffa8
Ffa0: c0021d60 c0075b98 000bd1c0 c0029c14 000bd2c4 00000006 00000001 00000002
Ffc0: 000bd1c0 00000000 000bd2f0 00000002 00000001 00000000 0009d09c 00008358
Ffe0: 000bd680 beb69dcc 00022a54 0007af28 60000010 000bd2c4 00000000 00000000
Backtrace:
[<C004a014>] (_ queue_work + 0x0/0x68) from [<c004a0ec>] (delayed_work_timer_fn + 0x18/0 x1c)
R7 = 00000000 R6 = c046e000 R5 = c004a0d4
[<C004a0d4>] (delayed_work_timer_fn + 0x0/0x1c) from [<c0042cf0>] (run_timer_softirq + 0x104/0 x1f4)
[<C0042bec>] (run_timer_softirq + 0x0/0x1f4) from [<c003ebf0>] (_ do_softirq + 0x70/0 xf0)
[<C003eb80>] (_ do_softirq + 0x0/0xf0) from [<c003eda0>] (irq_exit + 0x44/0 x4c)
[<C003ed5c>] (irq_exit + 0x0/0x4c) from [<c0022e10>] (asm_do_irq + 0x12c/0x140)
[<C0022ce4>] (asm_do_irq + 0x0/0x140) from [<c00219c4>] (_ irq_svc + 0x24/0x80)
[<C0039700>] (panic + 0x0/0x128) from [<c003c278>] (do_exit + 0x6a0/0 xbdc)
R3 = 00000001 r2 = c046e000 R1 = c046e000 R0 = c028abb8
[<C003bbd8>] (do_exit + 0x0/0 xbdc) from [<c00270e4>] (die + 0x20c/0x2a0)
[<C0026ed8>] (die + 0x0/0x2a0) from [<c00297c4>] (_ do_kernel_fault + 0x6c/0x7c)
[<C0029758>] (_ do_kernel_fault + 0x0/0x7c) from [<c00298e0>] (do_bad_area + 0x64/0x68)
R7 = c0091364 R6 = c046fdb0 R5 = 00030001 r4 = 00000001
[<C002987c>] (do_bad_area + 0x0/0x68) from [<c002b320>] (do_alignment + 0x268/0 x5c8)
R6 = e594c000 R5 = c046fdb0 r4 = c046e000
[<C002b0b8>] (do_alignment + 0x0/0x5c8) from [<c0029c40>] (do_dataabort + 0x3c/0xa4)
[<C0029c04>] (do_dataabort + 0x0/0xa4) from [<c0021980>] (_ dabt_svc + 0x40/0x60)
R8 = c046fe68 R7 = c0583d50 R6 = 05b6719b R5 = c046fde4
R4 = ffffffff
[<C00912f4>] (_ d_lookup + 0x0/0x140) from [<c0085aa4>] (do_lookup + 0x28/0 x1bc)
[<C0085a7c>] (do_lookup + 0x0/0x1bc) from [<c0086784>] (_ link_path_walk + 0x9a0/0xf80)
[<C0085de4>] (_ link_path_walk + 0x0/0xf80) from [<c0086e10>] (link_path_walk + 0xac/0x1b0)
[<C0086d64>] (link_path_walk + 0x0/0x1b0) from [<c0086fdc>] (path_lookup + 0xc8/0x1d0)
R7 = c0447000 R6 = 00000000 R5 = c046e000 r4 = c046ff3c
[<C0086f14>] (path_lookup + 0x0/0x1d0) from [<c00873b4>] (_ user_walk + 0x3c/0x5c)
R7 = c046ff3c R6 = c0447000 R5 = c046ff3c r4 = c0447000
[<C0087378>] (_ user_walk + 0x0/0x5c) from [<c0075c00>] (sys_access + 0x78/0x114)
R6 = 00000006 R5 = 00000000 r4 = c046e000
[<C0075b88>] (sys_access + 0x0/0x114) from [<c0021d60>] (ret_fast_syscall + 0x0/0x2c)
Code: e583c004 e3a01003 e3a03000 e58ce004 (e586e000)
<0> kernel panic-not syncing: aiee, killing interrupt handler!

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