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Check the Console Crash logs:
Please wait for OS to boot, or press any key to display configuration menu......
Booting OS...
Initializing firewall...
System is starting...
Unable to handle kernel NULL pointer dereference at virtual address 000001bc
pgd = ffffffc01d498000
[000001bc] *pgd=00000000687e7003, *pud=00000000687e7003, *pmd=0000000000000000
Internal error: Oops: 96000006 [#1] SMP
Modules linked in:
filter4
task: ffffffc01d474040 ti: ffffffc07678c000 task.ti: ffffffc07678c000
PC is at $x+0x68/0x448 [filter4]
LR is at $x+0x2c/0x448 [filter4]
pc : [<ffffffbffc3eba78>] lr : [<ffffffbffc3eba3c>] pstate: 60000145
sp : ffffffc07678f8b0
x29: ffffffc07678f8b0 x28: ffffffc07678c000
x27: ffffffc0004b6000 x26: 0000000000000001
x25: 0000000000000000 x24: 0000000000000000
x23: ffffffc07483a000 x22: 0000000000000001
x21: 0000000000000000 x20: 0000000000000043
x19: ffffffc062db28c0 x18: 0000000000000000
x17: 0000007f7892c340 x16: ffffffc0001424b0
x15: ffffffffffffffff x14: ffffffffffffffff
x13: ffffffffffffffff x12: 0000000000000008
x11: 0101010101010101 x10: fefefefffefdff30
x9 : 7f7f7f7f7f7f7f7f x8 : fefefefefefeff30
x7 : 0080ffff80808080 x6 : 00000000ffff0000
x5 : 8080808080808000 x4 : ffffffc073000078
x3 : ffffffc05dc6d6c4 x2 : ffffffc0007a0588
x1 : 0000000000000000 x0 : 0000000000000043
The issue is known bug 1046966.
It is a known issue with the set VLAN setting in the switch which occurs when the version is upgraded from version 7.4.3 to 7.4.4, triggering a continuous reboot.
The workaround is to unset the VLAN or upgrade to a build after 7.4.5:2675, 7.6.0:3391.
config system virtual-switch
edit "internal"
set physical-switch "sw0"
set vlan 2
config port
edit "internal1"
next
edit "internal2"
next
edit "internal3"
next
edit "internal4"
next
edit "internal5"
next
end
next
end
Note that this is applicable for units or FortiGates supporting Virtual switches, not all FortiGates.
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