====================================================== WARNING: possible circular locking dependency detected 6.6.97-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/5782 is trying to acquire lock: ffff888056c5c2d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff888056c5c2d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: __ocfs2_flush_truncate_log+0x351/0x10b0 fs/ocfs2/alloc.c:6047 but task is already holding lock: ffff88805ebea658 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff88805ebea658 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_flush_truncate_log+0x47/0x60 fs/ocfs2/alloc.c:6076 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}: down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline] __ocfs2_move_extents_range+0x1a65/0x3360 fs/ocfs2/move_extents.c:860 ocfs2_move_extents+0x379/0x940 fs/ocfs2/move_extents.c:927 ocfs2_ioctl_move_extents+0x4e1/0x6c0 fs/ocfs2/move_extents.c:1053 ocfs2_ioctl+0x195/0x750 fs/ocfs2/ioctl.c:945 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857 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 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] __ocfs2_flush_truncate_log+0x351/0x10b0 fs/ocfs2/alloc.c:6047 ocfs2_flush_truncate_log+0x4f/0x60 fs/ocfs2/alloc.c:6077 ocfs2_sync_fs+0x117/0x310 fs/ocfs2/super.c:402 sync_filesystem+0x1c2/0x220 fs/sync.c:66 generic_shutdown_super+0x6f/0x2b0 fs/super.c:666 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5); *** DEADLOCK *** 2 locks held by syz-executor/5782: #0: ffff88802455a0e0 (&type->s_umount_key#71){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88802455a0e0 (&type->s_umount_key#71){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88802455a0e0 (&type->s_umount_key#71){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 #1: ffff88805ebea658 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88805ebea658 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_flush_truncate_log+0x47/0x60 fs/ocfs2/alloc.c:6076 stack backtrace: CPU: 1 PID: 5782 Comm: syz-executor Not tainted 6.6.97-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] __ocfs2_flush_truncate_log+0x351/0x10b0 fs/ocfs2/alloc.c:6047 ocfs2_flush_truncate_log+0x4f/0x60 fs/ocfs2/alloc.c:6077 ocfs2_sync_fs+0x117/0x310 fs/ocfs2/super.c:402 sync_filesystem+0x1c2/0x220 fs/sync.c:66 generic_shutdown_super+0x6f/0x2b0 fs/super.c:666 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f625e18fc57 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffcd43b9268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f625e210925 RCX: 00007f625e18fc57 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcd43b9320 RBP: 00007ffcd43b9320 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcd43ba3b0 R13: 00007f625e210925 R14: 000000000002b0b3 R15: 00007ffcd43ba3f0 (syz-executor,5782,1):ocfs2_inode_is_valid_to_delete:872 ERROR: Skipping delete of system file 72 ocfs2: Unmounting device (7,2) on (node local)