fsck.ext4 -n exited with status code 4
e2fsck 1.47.0 (5-Feb-2023)
syzkaller contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
i_faddr for inode 16 (/file2) is 134217728, should be zero.
Clear? no

i_faddr for inode 16 (/file2) is 134217728, should be zero.
Clear? no

Invalid inode number for '.' in directory inode 11.
Fix? no

Entry '.' in /lost+found (11) has invalid inode #: 134217739.
Clear? no

Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Inode 11 ref count is 2, should be 1.  Fix? no

Pass 5: Checking group summary information
Free blocks count wrong for group #0 (4278190105, counted=25).
Fix? no

Free inodes count wrong for group #0 (983055, counted=15).
Fix? no


syzkaller: ********** WARNING: Filesystem still has errors **********

syzkaller: 17/32 files (0.0% non-contiguous), 112/512 blocks