fsck.ext4 -n exited with status code 12
e2fsck 1.47.2 (1-Jan-2025)
ext2fs_check_desc: Corrupt group descriptor: bad block for block bitmap
Note: if several inode or block bitmap blocks or part
of the inode table require relocation, you may wish to try
running e2fsck with the '-b 8193' option first.  The problem
may lie only with the primary block group descriptors, and
the backup block group descriptors may be OK.

Block bitmap for group 0 is not in group.  (block 67108866)
Relocate? no

One or more block group descriptor checksums are invalid.  Fix? no

Group descriptor 0 checksum is 0xd7c5, should be 0xe280.  IGNORED.
syzkaller contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
Illegal block number passed to ext2fs_test_block_bitmap #67108866 for in-use block map
Illegal block number passed to ext2fs_mark_block_bitmap #67108866 for in-use block map
Illegal block number passed to ext2fs_mark_block_bitmap #4194304 for metadata block map
Relocating group 0's inode bitmap to 160...
Pass 2: Checking directory structure
First entry '€' (inode=2) in directory inode 2 (/) should be '.'
Fix? no

i_faddr for inode 17 (/file.cold) is 2304, should be zero.
Clear? no

Error writing block 160 (Bad file descriptor).  Ignore error? no

ext2fs_read_inode: Bad file descriptor while reading inode 14 in check_filetype

syzkaller: ***** FILE SYSTEM WAS MODIFIED *****

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

e2fsck: aborted

syzkaller: ***** FILE SYSTEM WAS MODIFIED *****

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