loop2: detected capacity change from 0 to 512
EXT4-fs (loop2): Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 16871 Comm: syz.2.3047 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 lookup_chain_cache_add kernel/locking/lockdep.c:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b64/0x7638 kernel/locking/lockdep.c:5012
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xc4/0x14c kernel/locking/spinlock.c:162
 debug_object_activate+0x7c/0x4b0 lib/debugobjects.c:694
 debug_work_activate kernel/workqueue.c:509 [inline]
 __queue_work+0xb70/0x114c kernel/workqueue.c:1531
 queue_work_on+0xc4/0x17c kernel/workqueue.c:1559
 queue_work include/linux/workqueue.h:512 [inline]
 loop_queue_work drivers/block/loop.c:1067 [inline]
 loop_queue_rq+0x9a8/0xb20 drivers/block/loop.c:2201
 __blk_mq_issue_directly block/blk-mq.c:2008 [inline]
 __blk_mq_try_issue_directly+0x40c/0x6a0 block/blk-mq.c:2064
 blk_mq_try_issue_directly+0x108/0x334 block/blk-mq.c:2095
 blk_mq_submit_bio+0xf40/0x1ae0
 __submit_bio+0x628/0x664 block/blk-core.c:917
 __submit_bio_noacct_mq block/blk-core.c:997 [inline]
 submit_bio_noacct+0x680/0x7dc block/blk-core.c:1027
 submit_bio+0x394/0x68c block/blk-core.c:1089
 submit_bh_wbc+0x4c0/0x610 fs/buffer.c:3056
 submit_bh+0x3c/0x54 fs/buffer.c:3062
 __ext4_read_bh fs/ext4/super.c:156 [inline]
 ext4_read_bh_nowait+0x170/0x228 fs/ext4/super.c:168
 ext4_read_block_bitmap_nowait+0x5ec/0x930 fs/ext4/balloc.c:542
 ext4_read_block_bitmap+0x30/0xe8 fs/ext4/balloc.c:588
 ext4_mb_clear_bb fs/ext4/mballoc.c:6040 [inline]
 ext4_free_blocks+0xd48/0x2bdc fs/ext4/mballoc.c:6286
 ext4_clear_blocks+0x324/0x394 fs/ext4/indirect.c:895
 ext4_free_data fs/ext4/indirect.c:956 [inline]
 ext4_ind_truncate+0x3b4/0xa80 fs/ext4/indirect.c:1161
 ext4_truncate+0x804/0x1058 fs/ext4/inode.c:4251
 ext4_process_orphan+0x180/0x2b8 fs/ext4/orphan.c:339
 ext4_orphan_cleanup+0x8bc/0x1048 fs/ext4/orphan.c:474
 ext4_fill_super+0x8044/0x8768 fs/ext4/super.c:4975
 mount_bdev+0x274/0x370 fs/super.c:1400
 ext4_mount+0x44/0x58 fs/ext4/super.c:6603
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
 vfs_get_tree+0x90/0x274 fs/super.c:1530
 do_new_mount+0x278/0x8fc fs/namespace.c:3012
 path_mount+0x594/0x101c fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3540
 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
EXT4-fs error (device loop2): mb_free_blocks:1865: group 0, inode 11: block 64:freeing already freed block (bit 63); block bitmap corrupt.
EXT4-fs error (device loop2): ext4_free_branches:1030: inode #11: comm syz.2.3047: invalid indirect mapped block 1 (level 1)
EXT4-fs (loop2): 1 truncate cleaned up
EXT4-fs (loop2): mounted filesystem without journal. Opts: nogrpid,nodiscard,dioread_nolock,,errors=continue. Quota mode: none.
EXT4-fs error (device loop2): ext4_lookup:1850: inode #2: comm syz.2.3047: bad inode number: 1