3531A偶尔出现内核程序崩溃问题

3531A偶尔出现内核程序崩溃问题，不知道有没人遇到过？下面是崩溃时串口输出的内容：

Unable to handle kernel paging request at virtual address b6ef8814
pgd = d607c000
[b6ef8814] *pgd=57195831, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1] SMP ARM
Modules linked in: hdcap(O) sil9022a(O) hi3531a_adec(PO) hi3531a_aenc(PO) hi3531a_ao(PO) hi3531a_ai(PO) hi3531a_aio(PO) alpu(O) hi3531a_ive(PO) hi3531a_vda(PO) hi3531a_jpege(PO) hi3531a_h264e(PO) hi3531a_chnl(PO) hi3531a_venc(PO) hi3531a_rc(PO) hi3531a_hdmi(PO) hifb(PO) hi3531a_vou(PO) hi3531a_vpss(PO) hi3531a_viu(PO) hi3531a_vgs(PO) hi3531a_region(PO) hi3531a_tde(PO) hi3531a_jpegd(O) hi3531a_vfmw(PO) hi3531a_vdec(PO) hi3531a_sys(PO) hi3531a_base(PO) hi_media(O) hiuser(O) mmz(O)
CPU: 0 PID: 1771 Comm: grep Tainted: P           O 3.10.0 #1
task: d7218a80 ti: d606c000 task.ti: d606c000
PC is at kmap_atomic+0x20/0x120
LR is at copy_to_iter_bvec+0x4c/0x12c
pc : []    lr : []    psr: 80000013
sp : d606de00  ip : 00000000  fp : 00000001
r10: 0000075e  r9 : d606de94  r8 : d606ded8
r7 : 00000000  r6 : d6dea000  r5 : d606c000  r4 : b6ef8814
r3 : d606c000  r2 : 00000002  r1 : 0000075e  r0 : b6ef8814
Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 10c53c7d  Table: 5607c04a  DAC: 00000015

PC: 0xc002102c:
102c  e5932004 e2422001 e5832004 e8bd8008 e30e2680 e34c2062 e3023f00 e34c3063
104c  e5921000 e5932000 e7913520 e1a03623 e1a03283 e2430502 e0820000 eb02143f
106c  eaffffeb ee1d2f90 e30a3ce0 e34c305e e7921003 e2411001 e7821003 eaffffe4
108c  e92d4038 e1a0300d e3c35d7f e1a04000 e3c5303f e5932004 e2822001 e5832004
10ac  e5902000 e3023d40 e34c3062 e3a01d0b e1a02f22 e0233291 e593228c e0623003
10cc  e1530001 0a000001 e8bd4038 ea0213ee eb02145e e3500000 0a000000 e8bd8038
10ec  ee1d1f90 e3c5503f e30a3ce0 e34c305e e3032d0c e791e003 e34c2062 e302cf00
110c  e34cc063 e28ee001 e781e003 ee1def90 e5955014 e3031cfc e79e3003 e34c1062

LR: 0xc00a4b34:
4b34  e0607007 e0599007 e0888007 13a03001 03a03000 e3500000 13a00000 02030001
4b54  e3500000 0affffd8 eaffffeb e1a00005 e8bd87f0 e92d4ff0 e24dd00c e592a008
4b74  e1a09002 e151000a 31a0a001 e35a0000 e58da004 0a00003e e592800c e1a06000
4b94  e5927004 e9980810 e5980000 e0674004 e087b00b e15a0004 31a0400a ebfdf135
4bb4  e1a02004 e1a01006 e0866004 e1a05000 e080000b eb06d104 e1a00005 ebfdf10a
4bd4  e59da004 e05a5004 00844007 0a000013 e1a03008 e5934010 e283700c e593000c
4bf4  e1550004 e593a014 e1a08007 31a04005 ebfdf120 e1a01006 e1a02004 e0866004
4c14  e1a0b000 e080000a eb06d0ef e1a0000b ebfdf0f5 e0555004 e1a03007 1affffec

SP: 0xd606dd80:
dd80  c05eb640 d606c020 c0950640 d7218a80 c05eb640 d606c020 d606de44 c043f1c8
dda0  c00210ac 80000013 ffffffff d606ddec d606ded8 c0012ad8 b6ef8814 0000075e
ddc0  00000002 d606c000 b6ef8814 d606c000 d6dea000 00000000 d606ded8 d606de94
dde0  0000075e 00000001 00000000 d606de00 c00a4bb4 c00210ac 80000013 ffffffff
de00  c0632f00 0000075e 0000075e c00a4bb4 00000001 0000075e bf26ea98 d606de94
de20  0000075e d6dea000 00001000 00000001 00000000 00000000 c0447240 c00a4e44
de40  d723c100 c00c547c 60000193 d6497a00 d723c100 0000075e 00001000 00000001
de60  00000000 00000000 c0447240 c00c5b08 d606dfb0 d6497a00 00000000 00000000

R3: 0xd606bf80:
bf80  b6f32404 000000a2 c00130a8 d606a000 00000000 c0047c90 00000000 01c9c380
bfa0  00000000 c0012f00 00000000 b32f6e90 b32f6e90 00000000 b32f7554 b32f7960
bfc0  00000000 b32f6e90 b6f32404 000000a2 b32f7040 00800000 00000000 b32f6eec
bfe0  00000000 b32f6e80 b32f74d0 b6e5200c 80000010 b32f6e90 57ffe821 57ffec21
c000  00000002 00000003 00000000 d7218a80 c0600fc4 00000000 00000015 c0950640
c020  d7218a80 c05eb640 d606c020 d79e3c00 d721a680 d79e3880 d606de44 d606dda0
c040  c043f1b4 00000000 00000000 00000000 00000000 00000000 01010000 00000000
c060  b6f1c490 00000000 00000000 00000000 00000000 00000000 00000000 00000000

R5: 0xd606bf80:
bf80  b6f32404 000000a2 c00130a8 d606a000 00000000 c0047c90 00000000 01c9c380
bfa0  00000000 c0012f00 00000000 b32f6e90 b32f6e90 00000000 b32f7554 b32f7960
bfc0  00000000 b32f6e90 b6f32404 000000a2 b32f7040 00800000 00000000 b32f6eec
bfe0  00000000 b32f6e80 b32f74d0 b6e5200c 80000010 b32f6e90 57ffe821 57ffec21
c000  00000002 00000003 00000000 d7218a80 c0600fc4 00000000 00000015 c0950640
c020  d7218a80 c05eb640 d606c020 d79e3c00 d721a680 d79e3880 d606de44 d606dda0
c040  c043f1b4 00000000 00000000 00000000 00000000 00000000 01010000 00000000
c060  b6f1c490 00000000 00000000 00000000 00000000 00000000 00000000 00000000

R6: 0xd6de9f80:
9f80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fa0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fc0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
a000  20444950 53552020 20205245 54202020 20454d49 4f432020 4e414d4d 20200a44
a020  20312020 746f6f72 20202020 30202020 2031303a 74696e69 2020200a 72203220
a040  20746f6f 20202020 3a302020 5b203030 7268746b 64646165 20200a5d 20332020
a060  746f6f72 20202020 30202020 2030303a 6f736b5b 72697466 302f6471 20200a5d

R8: 0xd606de58:
de58  00001000 00000001 00000000 00000000 c0447240 c00c5b08 d606dfb0 d6497a00
de78  00000000 00000000 d606c000 d6e62780 d723c118 d723c150 c062384f c0076914
de98  00000000 00001000 d606ded8 00000001 0000003e 00000000 00000000 00001000
deb8  d606df80 d6e62780 d7218a80 00000000 00000000 c00bdc78 00000000 00000000
ded8  b6ef8814 00001000 00000001 d6e62780 00000000 00000000 00000000 d7218a80
def8  00000000 00000000 00000000 00000000 00000000 00000000 00001000 00000000
df18  00001000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
df38  00000000 00000000 00000000 d6e62780 b6ef8814 d606df80 b6ef8814 00000000

R9: 0xd606de14:
de14  0000075e bf26ea98 d606de94 0000075e d6dea000 00001000 00000001 00000000
de34  00000000 c0447240 c00a4e44 d723c100 c00c547c 60000193 d6497a00 d723c100
de54  0000075e 00001000 00000001 00000000 00000000 c0447240 c00c5b08 d606dfb0
de74  d6497a00 00000000 00000000 d606c000 d6e62780 d723c118 d723c150 c062384f
de94  c0076914 00000000 00001000 d606ded8 00000001 0000003e 00000000 00000000
deb4  00001000 d606df80 d6e62780 d7218a80 00000000 00000000 c00bdc78 00000000
ded4  00000000 b6ef8814 00001000 00000001 d6e62780 00000000 00000000 00000000
def4  d7218a80 00000000 00000000 00000000 00000000 00000000 00000000 00001000
Process grep (pid: 1771, stack limit = 0xd606c238)
Stack: (0xd606de00 to 0xd606e000)
de00: c0632f00 0000075e 0000075e c00a4bb4 00000001 0000075e bf26ea98 d606de94
de20: 0000075e d6dea000 00001000 00000001 00000000 00000000 c0447240 c00a4e44
de40: d723c100 c00c547c 60000193 d6497a00 d723c100 0000075e 00001000 00000001
de60: 00000000 00000000 c0447240 c00c5b08 d606dfb0 d6497a00 00000000 00000000
de80: d606c000 d6e62780 d723c118 d723c150 c062384f c0076914 00000000 00001000
dea0: d606ded8 00000001 0000003e 00000000 00000000 00001000 d606df80 d6e62780
dec0: d7218a80 00000000 00000000 c00bdc78 00000000 00000000 b6ef8814 00001000
dee0: 00000001 d6e62780 00000000 00000000 00000000 d7218a80 00000000 00000000
df00: 00000000 00000000 00000000 00000000 00001000 00000000 00001000 00000000
df20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
df40: 00000000 d6e62780 b6ef8814 d606df80 b6ef8814 00000000 00001000 c00be2cc
df60: d79e3c40 40000013 00000000 00000000 d6e62780 b6ef8814 00000000 c00be92c
df80: 00000000 00000000 b6efc8e4 b6ef716c 00001000 00000000 00000003 c00130a8
dfa0: d606c000 c0012f00 b6ef716c 00001000 00000000 b6ef8814 00001000 b6e82a54
dfc0: b6ef716c 00001000 00000000 00000003 bebf2b84 00000000 000e3f14 00000000
dfe0: b6ef716c bebf2b38 b6e81f74 b6eaa37c 60000010 00000000 00000000 00000000
[] (kmap_atomic+0x20/0x120) from [] (copy_to_iter_bvec+0x4c/0x12c)
[] (copy_to_iter_bvec+0x4c/0x12c) from [] (copy_page_to_iter+0x1b0/0x2c8)
[] (copy_page_to_iter+0x1b0/0x2c8) from [] (pipe_read+0x108/0x2f4)
[] (pipe_read+0x108/0x2f4) from [] (do_sync_read+0x78/0xa0)
[] (do_sync_read+0x78/0xa0) from [] (vfs_read+0x98/0x144)
[] (vfs_read+0x98/0x144) from [] (SyS_read+0x3c/0x78)
[] (SyS_read+0x3c/0x78) from [] (ret_fast_syscall+0x0/0x30)
Code: e3c5303f e5932004 e2822001 e5832004 (e5902000)
---[ end trace 0519bdf8286e2714 ]---
note: grep[1771] exited with preempt_count 2