BTRFS: error (device loop1) in btrfs_commit_transaction:2511: errno=-5 IO failure (Error while writing out transaction) BTRFS info (device loop1: state E): forced readonly BTRFS warning (device loop1: state E): Skipping commit of aborted transaction. BTRFS error (device loop1: state EA): Transaction aborted (error -5) BTRFS: error (device loop1: 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.1.18/4531: #0: ffff88817b528e60 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: inode_trylock include/linux/fs.h:824 [inline] #0: ffff88817b528e60 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: btrfs_inode_lock+0x50/0x70 fs/btrfs/inode.c:372 #1: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #2: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #3: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #4: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #5: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #6: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #7: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #8: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #9: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #10: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #11: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #12: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #13: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #14: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #15: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #16: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #17: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #18: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #19: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #20: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #21: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #22: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #23: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #24: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #25: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #26: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #27: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #28: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #29: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #30: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #31: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #32: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #33: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #34: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #35: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #36: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #37: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #38: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #39: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #40: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #41: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #42: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #43: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #44: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #45: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #46: ffff8881097388e8 (btrfs-tree-01){....}-{3:3}, at: btrfs_try_tree_read_lock+0x14/0x90 fs/btrfs/locking.c:152 #47: ffffffff8357ba08 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #47: ffffffff8357ba08 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #47: ffffffff8357ba08 (rcu_read_lock){....}-{1:2}, at: find_extent_buffer_nolock+0x19/0xa0 fs/btrfs/extent_io.c:1645 INFO: lockdep is turned off. CPU: 1 PID: 4531 Comm: syz.1.18 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x78/0xc0 lib/dump_stack.c:106 __lock_acquire+0x3dd/0x450 kernel/locking/lockdep.c:-1 lock_acquire+0xd6/0x200 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+0x38/0xa0 fs/btrfs/extent_io.c:1645 find_extent_buffer+0xe/0xc0 fs/btrfs/extent_io.c:3610 read_block_for_search+0x130/0x320 fs/btrfs/ctree.c:1686 btrfs_search_slot+0x5da/0xad0 fs/btrfs/ctree.c:2355 btrfs_lookup_file_extent+0x49/0x70 fs/btrfs/file-item.c:270 can_nocow_extent+0xec/0x310 fs/btrfs/inode.c:7094 btrfs_check_nocow_lock+0xf4/0x170 fs/btrfs/file.c:1092 btrfs_buffered_write+0x278/0x7d0 fs/btrfs/file.c:1265 btrfs_do_write_iter+0xbb/0x530 fs/btrfs/file.c:1689 call_write_iter include/linux/fs.h:2018 [inline] aio_write+0x28a/0x320 fs/aio.c:1593 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x4b3/0x6c0 fs/aio.c:2012 __do_sys_io_submit fs/aio.c:2071 [inline] __se_sys_io_submit+0xb4/0x1b0 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: 0033:0x7f88a7d8eec9 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:00007f88a8b9f038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f88a7fe6090 RCX: 00007f88a7d8eec9 RDX: 0000200000000540 RSI: 0000000000000001 RDI: 00007f88a8ba0000 RBP: 00007f88a7e11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f88a7fe6128 R14: 00007f88a7fe6090 R15: 00007ffc17dc4278