F2FS-fs (loop3): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop3): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop3): Invalid segment count (0)
F2FS-fs (loop3): Can't find valid F2FS filesystem in 2th superblock
unregister_netdevice: waiting for lo to become free. Usage count = 4