F2FS-fs (loop0): Invalid blocksize (65536), supports only 4KB F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop0): Found nat_bits in checkpoint F2FS-fs (loop0): Mounted with checkpoint version = 3e17dab1 ================================================ WARNING: lock held when returning to user space! 4.14.295-syzkaller #0 Not tainted ------------------------------------------------ syz-executor166/7993 is leaving the kernel with locks still held! 1 lock held by s