아래와 같이 NAND flash가 마운트 된 디렉토리로 들어가서 쓰기를 시도하면 에
러가 발생합니다. 다른 EZ-X5는 그렇지 않은데... 이번것은 이상한 증상을 보
이는군요. 뭐가 잘못된걸까요?

[root@ez-x5 /app]$ pwd
/app
[root@ez-x5 /app]$ touch a
Unable to handle kernel NULL pointer dereference at virtual address
00000000
mm = c00111a0 pgd = c0ba4000
*pgd = a0bc4801, *pmd = a0bc4801, *pte = 00000000, *ppte = 00000000
Internal error: Oops: 0
CPU: 0
pc : [] lr : [] Not tainted
sp : c0bab6ec ip : 00000000 fp : c0167bd0
r10: 00000010 r9 : 00000000 r8 : c0167fcf
r7 : 00000000 r6 : c015520c r5 : 60000013 r4 : c0167bd0
r3 : c0bab744 r2 : 00000000 r1 : c0167fd0 r0 : c0167bcf
Flags: nzCv IRQs off FIQs on Mode SVC_32 Segment user
Control: 397F Table: A0BA4000 DAC: 00000015
Process touch (pid: 109, stack limit = 0xc0baa368)
Stack: (0xc0bab6ec to 0xc0bac000)
b6e0: c0bab734 00000013 c0bab734 c001af74
00000400
b700: 00000000 c0167bd0 60000013 c015520c 00000000 00000000 00000000
00000010
b720: 000020a0 c0026018 00000000 c0397260 c039730c 00000010 00000000
c00c5348
b740: 00000000 c01428d8 000020a0 00000000 00000000 00014010 00000000
00000200
b760: c0bab7cc c0babca0 00000000 00000000 c00c7238 c0bab79c c0bab7cc
00014000
b780: 00000000 c0397560 c009516c c0bab79c c0bab7cc 00000000 00000200
00000010
b7a0: 000000a0 00000001 c0be0000 00000005 c0159c80 0000001f c00901ac
00000000
b7c0: c02d8020 c0be0000 c0090604 ffffffff ffff00ff ffffffff ffffffff
c0be0000
b7e0: c02d8020 00000005 00000000 c00920f8 c02d8020 c0be0000 000000bf
00000005
b800: 00000001 c0092f64 ffffffff ffffff00 ffffffff ffffffff 000000bf
c0be0000
b820: 00000000 c0be0000 c0baba6c 00000020 c0090548 00000000 00000400
40000000
b840: 00000000 00000000 00000000 00000080 00000000 00000000 00000000
00000000
b860: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
b880: 00000000 00000000 00000040 00000000 10020000 00000000 00000000
00000000
b8a0: 00000000 00000000 00000000 00000000 00400000 00000000 00000000
00000000
b8c0: 00000000 00000000 00400000 00000000 00000000 00000000 00000000
00000000
b8e0: 00000000 00002000 00000000 00000000 00000000 00000000 00000100
00000000
b900: 00000000 00000000 00000000 00000000 00000020 00000000 00000000
00000020
b920: 00004000 00000000 00000400 00000000 00000000 00400000 00000000
00000000
b940: 00000000 00000000 00000000 00000000 00000004 00000000 00000000
00000000
b960: 00000000 00020000 00000000 00000000 00000000 00000000 00000000
00000000
b980: 00000000 00000000 00000000 00000000 00000080 40000000 00000000
00000000
b9a0: 00000000 c016e8ac 00000000 00000000 00000400 c0048140 c0bb1a80
c0bb1ae0
b9c0: c004826c c0198f48 00000400 c03a6120 00000400 c0198f48 00000100
0000023c
b9e0: c03a6120 00000400 c03a6120 c004a430 00000100 00000400 00000100
00000400
ba00: 0000023e c0047d0c c0baba64 00000001 c0baba64 c0047ff8 c0bb1a20
c0baba64
ba20: c006b750 000001d0 c0bb1ea0 0000b190 c0241e5c 00000400 00000000
00000400
ba40: 000000a1 00000000 c0baba98 c0babca0 c0baba6c c0be0000 00000000
ffffffff
ba60: c0be0000 c0babca0 c0092a60 ffd00000 0104ffff 5cffffff ffffffc1
c0baba98
ba80: 00000000 c0a8412c c0a84064 c0983a9c c00932b0 c03a6120 ffd00000
c15c0104
baa0: c004a430 00000100 00000400 00000100 00000400 00001357 c0047d0c
c0babb0c
bac0: 00000001 c0babb0c 20000013 c0156564 00000101 00000000 000001d2
c0156330
bae0: ffffffff c0156560 c0babbb8 c00402c8 c0010c00 c0ba5000 c0010c00
c022d87c
bb00: a09e80bf c0010c00 c01ad3f4 c0035490 c016c0c0 00000000 20000013
c0156564
bb20: 00000101 00000000 000001d2 c0156330 ffffffff c0156560 c0babc08
c00402c8
bb40: c0010de0 c0ba4000 c0010de0 c01b1e60 a09db0bf c0010de0 c01ad1b8
c0035490
bb60: c0baa000 00000000 c0ba4000 c00111a0 ffffffff 00063000 c0010de0
20000013
bb80: c0156564 00000101 00000000 000001d2 c0156330 ffffffff c0156560
c0babc6c
bba0: c00402c8 c0010f00 c0ba5000 c0010f00 c022d87c a0ad10bf c0010f00
c01afc00
bbc0: c0035490 c00202a8 00000000 20000013 c0156564 00000101 00000000
000001d2
bbe0: c0156330 ffffffff c0156560 c0babcbc c00402c8 c0010d80 c0ba4000
c0010d80
bc00: c01b1e60 a09870bf c0010d80 c01ac348 c0035490 c0baa000 00000000
c0ba4000
bc20: c00111a0 ffffffff 00063000 c0010d80 ffffffff c00111a0 c0babcbc
c00355d8
bc40: c0bc4d8c 20000013 c0010d80 c0baa000 000633c8 000633c8 ffffffff
c002013c
bc60: c00111bc c0baa000 c00111a0 000633c8 00000000 000633c8 c00202a8
c0babd9c
bc80: 00000007 c0babcf0 c01337dc 000633c8 c0babcbc 20000013 c0babfb0
00000002
bca0: 00000001 00000001 0061ffff 00000000 00000000 00000000 00000000
00000000
bcc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
bce0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
bd00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
bd20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
bd40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
bd60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
bd80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
bda0: 00000000 00000000 ffff0000 000081a4 00000000 00000000 0000001c
0000001c
bdc0: 0000001c 00000000 ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff
bde0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff
be00: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff
be20: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff
be40: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff
be60: ffffffff ffffffff ffffffff 00000000 ffffffff ffffffff ffffffff
ffffffff
be80: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff
bea0: c0a8412c c0a84064 00000001 00000000 c0983a9c ffffffff 000081a4
00000000
bec0: c00919fc 00000000 00000000 000081a4 c0983a40 00000000 c0be0000
c0aa69c0
bee0: c0babf78 c0091a8c 00000000 00000000 00000000 00000000 00000000
c0a84064
bf00: c0159c80 c008f274 00000000 c0be0000 000081a4 fffffff3 c0aa6a38
c0aa69c0
bf20: c0983a40 00000006 000001b6 c0050fd4 c0983a40 00000043 c0babf70
c0bbdaa0
bf40: 00000000 c005156c c0983a40 00000042 000001b6 00000042 c03b9000
c001a784
bf60: c0baa000 4013b8bc 00000000 c0044eec c0bbdaa0 c027f3a0 c03b9000
00000001
bf80: 000042f2 00000010 00000000 00000003 c0045274 bffffc68 00000001
00000001
bfa0: 00000005 c001a5e0 bffffc68 c001a55c bffffd3b 00000042 000001b6
00000061
bfc0: bffffc68 00000001 00000001 00000002 00000002 0004313c 4013b8bc
000634e0
bfe0: 400e0740 bffffc10 000393bc 400e0744 60000010 bffffd3b ffffffff
ffffffef
Backtrace: frame pointer underflow
Backtrace aborted due to bad frame pointer
Code: 326b0000 358d0010 e1a0c002 e58d2014 (e5dc2000)
Segmentation fault
[root@ez-x5 /app]$
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