Ubuntu 16.04 + Qemu + Raspberry Pi image triggered kernel panic

I tried to boot Raspbian OS on Qemu but failed!!
Ubuntu 16.04 + Qemu + Raspberry Pi image

Freeing unused kernel memory: 176K (c0530000 - c055c000)
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004

I googled it and resolved..
It need to edit raspberry pi's files in .img
/etc/fstab by commenting out mmcblk entries
and /etc/ld.so.preload old entries.

OK, lets check .img file.

umiushi@umiushi-VirtualBox:~/Desktop/armv6_stretch$ file raspbian-stretch.img 
raspbian-stretch.img: DOS/MBR boot sector; partition 1 : ID=0xc, start-CHS (0x0,130,3), 
end-CHS (0x7,165,30), startsector 8192, 114688 sectors; 
partition 2 : ID=0x83, start-CHS (0x7,165,31), end-CHS (0x18e,97,19), startsector 122880, 6277120 sectors

Then, trying fdisk command.
Which sector should be mounted..

umiushi@umiushi-VirtualBox:~/Desktop/armv6_stretch$ fdisk -l ./raspbian-stretch.img
Disk ./raspbian-stretch.img: 3.1 GiB, 3276800000 bytes, 6400000 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0009bf4f

Device                  Boot  Start     End Sectors Size Id Type
./raspbian-stretch.img1        8192  122879  114688  56M  c W95 FAT32 (LBA)
./raspbian-stretch.img2      122880 6399999 6277120   3G 83 Linux

OK, lets mount that. offset is 512*122880.

umiushi@umiushi-VirtualBox:~/Desktop/armv6_stretch$ sudo mount -v -o offset=62914560 -t ext4 ./raspbian-stretch.img /mnt/
[sudo] password for umiushi: 
mount: /dev/loop0 mounted on /mnt.

umiushi@umiushi-VirtualBox:~/Desktop/armv6_stretch$ ls /mnt/
bin   dev  home  lost+found  mnt  proc  run   srv  tmp  var
boot  etc  lib   media       opt  root  sbin  sys  usr

We can now edit files!!
Commentig out as followings..
/mnt/etc/ld.so.preload

#/usr/lib/arm-linux-gnueabihf/libarmmem.so

/mnt/etc/fstab

proc            /proc           proc    defaults          0       0
#/dev/mmcblk0p1  /boot           vfat    defaults          0       2
#/dev/mmcblk0p2  /               ext4    defaults,noatime  0       1
# a swapfile is not a swap partition, so no using swapon|off from here on, use  dphys-swapfile swap[on|off]  for that

$ sudo umount /mnt
and lets re-try execute qemu boot raspbian!!!
$ ./start.sh

#!/bin/bash

SSH_PORT=5022
EXTRA_PORT=6987

qemu-system-arm \
  -cpu arm1176 \
  -m 256 \
  -redir tcp:${SSH_PORT}::22 \
  -redir tcp:${EXTRA_PORT}::4444 \
  -kernel kernel-qemu-4.4.34-jessie \
  -M versatilepb \
  -no-reboot \
  -serial stdio \
  -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw console=ttyAMA0" \
  -nographic -monitor /dev/null \
  -hda ./raspbian-stretch.img

And another way,
Ubuntu 18.04 does not happend that kernel panic error without editting fstab and ld.so.preload.