Output on non patched mainline kernel
root@k2e-evm:~/arm-linux-gnueabihf# flash_erase /dev/mtd4 0 0
Erasing 128 Kibyte @ 1fde0000 -- 99 % complete flash_erase: Skipping bad block at 1fe00000
flash_erase: Skipping bad block at 1fe20000
flash_erase: Skipping bad block at 1fe40000
flash_erase: Skipping bad block at 1fe60000
Erasing 128 Kibyte @ 1fe60000 -- 100 % complete
root@k2e-evm:~/arm-linux-gnueabihf# ./nanddump -f /tmp/dump -s 0 -l 2048 /dev/mtd4
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 4
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000800...
root@k2e-evm:~/arm-linux-gnueabihf#
root@k2e-evm:~/arm-linux-gnueabihf# hexdump /tmp/dump
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0000800
root@k2e-evm:~/arm-linux-gnueabihf# ./nandflipbits /dev/mtd4 1@0:5@0:7@30:3@46:5@47
root@k2e-evm:~/arm-linux-gnueabihf# ./nanddump -f /tmp/dump -s 0 -l 2048 /dev/mtd4
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 4
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000800...
root@k2e-evm:~/arm-linux-gnueabihf# hexdump /tmp/dump
0000000 ffdd ffff ffff ffff ffff ffff ffff ffff
0000010 ffff ffff ffff ffff ffff ffff ffff ff7f
0000020 ffff ffff ffff ffff ffff ffff ffff dff7
0000030 ffff ffff ffff ffff ffff ffff ffff ffff