EXT4-fs error (device loop3): ext4_mb_generate_buddy:1152: group 0, block bitmap and bg descriptor inconsistent: 21 vs 268369941 free clusters
EXT4-fs (loop3): Remounting filesystem read-only
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 8165 Comm: syz.3.1054 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b30/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0xb0/0x10c kernel/locking/spinlock.c:154
 console_lock_spinning_enable+0x24/0x78 kernel/printk/printk.c:1800
 console_unlock+0x964/0x133c kernel/printk/printk.c:2741
 vprintk_emit+0x13c/0x218 kernel/printk/printk.c:2274
 vprintk_default+0x54/0x80 kernel/printk/printk.c:2289
 vprintk+0x1e8/0x284 kernel/printk/printk_safe.c:45
 _printk+0xd0/0x118 kernel/printk/printk.c:2299
 __ext4_msg+0x1cc/0x208 fs/ext4/super.c:917
 ext4_handle_error+0x598/0x6c0 fs/ext4/super.c:675
 __ext4_grp_locked_error+0x1e4/0x864 fs/ext4/super.c:1004
 ext4_mb_generate_buddy+0x570/0x758 fs/ext4/mballoc.c:1149
 ext4_mb_init_cache+0xd68/0x13b8 fs/ext4/mballoc.c:1339
 ext4_mb_init_group+0x284/0x488 fs/ext4/mballoc.c:1475
 ext4_mb_load_buddy_gfp+0x8c0/0x99c fs/ext4/mballoc.c:1545
 ext4_mb_load_buddy fs/ext4/mballoc.c:1653 [inline]
 ext4_mb_find_by_goal+0x174/0xa4c fs/ext4/mballoc.c:2258
 ext4_mb_regular_allocator+0x16c/0x2e8c fs/ext4/mballoc.c:2702
 ext4_mb_new_blocks+0xb9c/0x4024 fs/ext4/mballoc.c:5777
 ext4_ext_map_blocks+0xf74/0x562c fs/ext4/extents.c:4341
 ext4_map_blocks+0x7b8/0x167c fs/ext4/inode.c:673
 mpage_map_one_extent fs/ext4/inode.c:2408 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2461 [inline]
 ext4_writepages+0xf00/0x2c14 fs/ext4/inode.c:2829
 do_writepages+0x36c/0x578 mm/page-writeback.c:2386
 filemap_fdatawrite_wbc+0x1d4/0x234 mm/filemap.c:400
 __filemap_fdatawrite_range mm/filemap.c:433 [inline]
 file_write_and_wait_range+0x100/0x1c0 mm/filemap.c:810
 ext4_sync_file+0x1f4/0xb80 fs/ext4/fsync.c:151
 vfs_fsync_range+0x168/0x188 fs/sync.c:188
 generic_write_sync include/linux/fs.h:2989 [inline]
 ext4_buffered_write_iter+0x4a8/0x538 fs/ext4/file.c:275
 ext4_file_write_iter+0x698/0x14cc include/linux/fs.h:-1
 do_iter_readv_writev+0x3a0/0x4f8 fs/read_write.c:-1
 do_iter_write+0x1c4/0x670 fs/read_write.c:855
 vfs_writev fs/read_write.c:928 [inline]
 do_pwritev+0x1c8/0x2fc fs/read_write.c:1025
 __do_sys_pwritev2 fs/read_write.c:1084 [inline]
 __se_sys_pwritev2 fs/read_write.c:1075 [inline]
 __arm64_sys_pwritev2+0xd4/0x108 fs/read_write.c:1075
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584