====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.26/5982 is trying to acquire lock: ffff88805c89df58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff88805c89df58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:646 [inline] ffff88805c89df58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1a63/0x35d0 fs/ocfs2/move_extents.c:866 but task is already holding lock: ffff88805c8989d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff88805c8989d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:638 [inline] ffff88805c8989d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1381/0x35d0 fs/ocfs2/move_extents.c:866 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]#3){+.+.}-{3:3}: down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] __ocfs2_flush_truncate_log+0x352/0x1130 fs/ocfs2/alloc.c:6046 ocfs2_flush_truncate_log+0x4f/0x60 fs/ocfs2/alloc.c:6076 ocfs2_sync_fs+0x11d/0x330 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+0x43b/0x4d0 fs/namespace.c:1259 task_work_run+0x1d4/0x260 kernel/task_work.c:245 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0x95a/0x2460 kernel/exit.c:883 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024 get_signal+0x12fc/0x13f0 kernel/signal.c:2902 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_move_extent fs/ocfs2/move_extents.c:646 [inline] __ocfs2_move_extents_range+0x1a63/0x35d0 fs/ocfs2/move_extents.c:866 ocfs2_move_extents+0x3a7/0x9a0 fs/ocfs2/move_extents.c:938 ocfs2_ioctl_move_extents+0x527/0x6c0 fs/ocfs2/move_extents.c:1064 ocfs2_ioctl+0x199/0x7e0 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:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 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]#3); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); *** DEADLOCK *** 5 locks held by syz.1.26/5982: #0: ffff88807c3ea418 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write_file+0x63/0x200 fs/namespace.c:456 #1: ffff88805c89ed98 (&sb->s_type->i_mutex_key#22){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88805c89ed98 (&sb->s_type->i_mutex_key#22){+.+.}-{3:3}, at: ocfs2_move_extents+0x1a0/0x9a0 fs/ocfs2/move_extents.c:916 #2: ffff88805c89ea20 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_move_extents+0x39a/0x9a0 fs/ocfs2/move_extents.c:936 #3: ffff88805c89a658 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #3: ffff88805c89a658 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16e/0x44c0 fs/ocfs2/suballoc.c:782 #4: ffff88805c8989d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #4: ffff88805c8989d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:638 [inline] #4: ffff88805c8989d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1381/0x35d0 fs/ocfs2/move_extents.c:866 stack backtrace: CPU: 1 PID: 5982 Comm: syz.1.26 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 check_noncircular+0x2fc/0x400 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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_move_extent fs/ocfs2/move_extents.c:646 [inline] __ocfs2_move_extents_range+0x1a63/0x35d0 fs/ocfs2/move_extents.c:866 ocfs2_move_extents+0x3a7/0x9a0 fs/ocfs2/move_extents.c:938 ocfs2_ioctl_move_extents+0x527/0x6c0 fs/ocfs2/move_extents.c:1064 ocfs2_ioctl+0x199/0x7e0 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:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f87c7d9c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f87c8be2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f87c8016090 RCX: 00007f87c7d9c819 RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000005 RBP: 00007f87c7e32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f87c8016128 R14: 00007f87c8016090 R15: 00007ffceb4a4fc8