BTRFS: error (device loop0: state EA) in cleanup_transaction:2004: errno=-5 IO failure BUG: MAX_LOCK_DEPTH too low! turning off the locking correctness validator. depth: 48 max: 48! 48 locks held by syz.0.502/9402: #0: ffff88805ee1c6d0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: inode_trylock include/linux/fs.h:824 [inline] #0: ffff88805ee1c6d0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: btrfs_inode_lock+0x8d/0xe0 fs/btrfs/inode.c:372 #1: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #2: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #3: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #4: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #5: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #6: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #7: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #8: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #9: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #10: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #11: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #12: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #13: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #14: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #15: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #16: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #17: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #18: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #19: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #20: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #21: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #22: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #23: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #24: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #25: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #26: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #27: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #28: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #29: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #30: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #31: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #32: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #33: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #34: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #35: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #36: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #37: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #38: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #39: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #40: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #41: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #42: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #43: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #44: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #45: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #46: ffff888064530a28 (btrfs-tree-01){++++}-{3:3}, at: btrfs_try_tree_read_lock+0x1e/0x1f0 fs/btrfs/locking.c:152 #47: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #47: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #47: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: find_extent_buffer_nolock+0x21/0x320 fs/btrfs/extent_io.c:1637 INFO: lockdep is turned off. CPU: 0 PID: 9402 Comm: syz.0.502 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 __lock_acquire+0x1ba4/0x7c80 kernel/locking/lockdep.c:-1 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 rcu_lock_acquire include/linux/rcupdate.h:334 [inline] rcu_read_lock include/linux/rcupdate.h:786 [inline] find_extent_buffer_nolock+0x3d/0x320 fs/btrfs/extent_io.c:1637 find_extent_buffer+0x24/0x1a0 fs/btrfs/extent_io.c:3594 read_block_for_search+0x2eb/0x990 fs/btrfs/ctree.c:1686 btrfs_search_slot+0x109a/0x27e0 fs/btrfs/ctree.c:2355 btrfs_lookup_file_extent+0xd9/0x120 fs/btrfs/file-item.c:270 can_nocow_extent+0x1bb/0x810 fs/btrfs/inode.c:7093 btrfs_check_nocow_lock+0x245/0x3a0 fs/btrfs/file.c:1092 btrfs_buffered_write+0x559/0x1130 fs/btrfs/file.c:1265 btrfs_do_write_iter+0x24b/0x11b0 fs/btrfs/file.c:1689 call_write_iter include/linux/fs.h:2018 [inline] aio_write+0x53c/0x790 fs/aio.c:1593 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x70b/0x1240 fs/aio.c:2012 __do_sys_io_submit fs/aio.c:2071 [inline] __se_sys_io_submit+0x194/0x300 fs/aio.c:2041 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff4fb98eec9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff4fc7d8038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007ff4fbbe6090 RCX: 00007ff4fb98eec9 RDX: 0000200000000540 RSI: 0000000000000001 RDI: 00007ff4fc7d9000 RBP: 00007ff4fba11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff4fbbe6128 R14: 00007ff4fbbe6090 R15: 00007ffe792afbf8