====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/4277 is trying to acquire lock: ffff88805541a648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff88805541a648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: __ocfs2_flush_truncate_log+0x36a/0x1220 fs/ocfs2/alloc.c:6046 but task is already holding lock: ffff8880556309c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff8880556309c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_flush_truncate_log+0x43/0x60 fs/ocfs2/alloc.c:6075 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]#5){+.+.}-{3:3}: down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ocfs2_move_extent fs/ocfs2/move_extents.c:646 [inline] __ocfs2_move_extents_range+0x1a5f/0x35d0 fs/ocfs2/move_extents.c:866 ocfs2_move_extents+0x3ad/0x9c0 fs/ocfs2/move_extents.c:938 ocfs2_ioctl_move_extents+0x520/0x6c0 fs/ocfs2/move_extents.c:1064 ocfs2_ioctl+0x31e/0x7c0 fs/ocfs2/ioctl.c:930 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] __ocfs2_flush_truncate_log+0x36a/0x1220 fs/ocfs2/alloc.c:6046 ocfs2_flush_truncate_log+0x4b/0x60 fs/ocfs2/alloc.c:6076 ocfs2_sync_fs+0x119/0x330 fs/ocfs2/super.c:402 sync_filesystem+0x1be/0x220 fs/sync.c:66 generic_shutdown_super+0x6b/0x340 fs/super.c:474 kill_block_super+0x7c/0xe0 fs/super.c:1470 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x42c/0x4b0 fs/namespace.c:1191 task_work_run+0x1d0/0x260 kernel/task_work.c:203 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+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82 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]#5); 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); *** DEADLOCK *** 2 locks held by syz-executor/4277: #0: ffff888056af40e0 (&type->s_umount_key#57){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:362 #1: ffff8880556309c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff8880556309c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_flush_truncate_log+0x43/0x60 fs/ocfs2/alloc.c:6075 stack backtrace: CPU: 1 PID: 4277 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] __ocfs2_flush_truncate_log+0x36a/0x1220 fs/ocfs2/alloc.c:6046 ocfs2_flush_truncate_log+0x4b/0x60 fs/ocfs2/alloc.c:6076 ocfs2_sync_fs+0x119/0x330 fs/ocfs2/super.c:402 sync_filesystem+0x1be/0x220 fs/sync.c:66 generic_shutdown_super+0x6b/0x340 fs/super.c:474 kill_block_super+0x7c/0xe0 fs/super.c:1470 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x42c/0x4b0 fs/namespace.c:1191 task_work_run+0x1d0/0x260 kernel/task_work.c:203 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+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f1ca139d1d7 Code: a2 c7 05 bc e3 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fff743a7418 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f1ca1431c3b RCX: 00007f1ca139d1d7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff743a74d0 RBP: 00007fff743a74d0 R08: 00007fff743a84d0 R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff743a8560 R13: 00007f1ca1431c3b R14: 000000000001a1c7 R15: 00007fff743a85a0 ocfs2: Unmounting device (7,4) on (node local)