Do anyone have a problem that FortiGate 60C always hang?  The unit can be reachable by pinging to the wan1 interface, but the console, web gui, telnet had no response.  All VPN tunnel and internet access traffic also had no response too.
 
 Once I tried to keep the console turned on and just before the unit was hanged, I have seen the following error:
 
 
 
 Unable to handle kernel paging request at virtual address 6e6f698d
 mm = c0200bc0 pgd = c0004000
 *pgd = 00000000, *pmd = 00000000
 Internal error: Oops: 0
 CPU: 0
 pc : [<c003eea8>]    lr : [<c012c5ec>]    Not tainted
 sp : c01ffd88  ip : 00000000  fp : c4bd6000
 r10: dc9b62e0  r9 : c4c91794  r8 : 0000f2c6
 r7 : 00000001  r6 : 00000000  r5 : 00000000  r4 : c4c916e0
 r3 : ce2908c0  r2 : ce2908c0  r1 : 00000000  r0 : 6e6f6974
 Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  Segment kernel
 Control: 3177  Table: 0000C000  DAC: 0000001D
 Process swapper (pid: 0, stack limit = 0xc01fe370)
 Stack: (0xc01ffd88 to 0xc0200000)
 fd80:                   c4c916e0 00000000 c012c770 c4c916e0 c0132128 ce29008c
 fda0: c01ffe50 c4c916e0 dbe44070 00000000 c0132154 c0139dc8 c0139dc8 c01ffddc
 fdc0: c026a5b0 00000001 dbda2c00 c01ffde0 00000000 c013a090 c01418b8 c026a5b0
 fde0: cfa28980 cfa28980 dbda2c00 cfa28980 dbda2c00 c01ffe40 c0141b80 00204000
 fe00: 00000000 00000002 00000000 00000000 00000001 00000000 00000000 000003e9
 fe20: c01ffe58 c01ffe30 c0022264 c0021bbc d7c6d388 d817b800 d817b80c a0000093
 fe40: d7be69fc 00000001 a0000013 c01ffe98 00000000 00000004 00000000 00000000
 fe60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
 fe80: 00000000 0000c6f2 00000000 00000000 00000000 c4c916e0 c4c916e0 dbe51400
 fea0: dbe44070 0000005c dbe44080 dc9b62e0 dbe440e0 c0132258 c4bd6000 dc916500
 fec0: dbda2570 dbda2400 dc9b6000 00000040 c01fff0c dbe44000 dc958c78 00000001
 fee0: 00000000 c0901060 00000000 c01fff0c dbe44000 c01fff30 dbda2800 dbe44070
 ff00: 00000040 00000000 dc916890 00000000 dbda28e4 dbda2800 c0200180 00a4c09a
 ff20: c024c658 ffffffff 00000001 c0132464 0000012c 00000001 c0200070 00000000
 ff40: c024c200 60000093 c00295cc c01fffb8 00000000 40000000 c024c200 c01fff84
 ff60: c001a080 c001a080 c12370c0 c01fffb8 00000000 40000000 c001a9e8 60000013
 ff80: c00191a0 00000000 00000032 00000000 60000013 c001a9a8 c01fe000 00000000
 ffa0: 00000000 c0016e20 00000000 00000001 00000000 20000013 c01fffcc c001a9dc
 ffc0: c001a9e8 60000013 ffffffff c001aa40 c024dad4 c025d88c c0008648 c023fec4
 ffe0: c026cb94 c026cb94 c023fab4 c023fab0 c0200e50 66056261 00015e84 c0008080
 Backtrace: not available
 Code: eb05a5c0 e1a00004 e8bd8010 c024db4c (e5d03019)
 Kernel panic: Aiee, killing interrupt handler!
 In interrupt handler - not syncing
  Init SSP ...OK
 Read SPI ...OK
 
 
 
 My firmware version is v4.0,build5263,100619 (MR1).