====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0 Not tainted ------------------------------------------------------ syz-executor/7562 is trying to acquire lock: ffff88805cfbdf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] ffff88805cfbdf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: __ocfs2_flush_truncate_log+0x31e/0x1160 fs/ocfs2/alloc.c:6054 but task is already holding lock: ffff8880381a2640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] ffff8880381a2640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_flush_truncate_log+0x42/0x70 fs/ocfs2/alloc.c:6083 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]#2){+.+.}-{4:4}: down_write+0x92/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_move_extent+0x6ea/0x17f0 fs/ocfs2/move_extents.c:640 __ocfs2_move_extents_range fs/ocfs2/move_extents.c:860 [inline] ocfs2_move_extents+0xd69/0x1980 fs/ocfs2/move_extents.c:927 ocfs2_ioctl_move_extents+0x54d/0xb20 fs/ocfs2/move_extents.c:1053 ocfs2_ioctl+0x3c6/0x6f0 fs/ocfs2/ioctl.c:946 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_write+0x92/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] __ocfs2_flush_truncate_log+0x31e/0x1160 fs/ocfs2/alloc.c:6054 ocfs2_flush_truncate_log+0x4a/0x70 fs/ocfs2/alloc.c:6084 ocfs2_sync_fs+0x1c6/0x3d0 fs/ocfs2/super.c:406 sync_filesystem+0x1d0/0x290 fs/sync.c:66 generic_shutdown_super+0x74/0x390 fs/super.c:622 kill_block_super+0x3b/0x90 fs/super.c:1755 deactivate_locked_super+0xc1/0x1a0 fs/super.c:474 deactivate_super fs/super.c:507 [inline] deactivate_super+0xde/0x100 fs/super.c:503 cleanup_mnt+0x225/0x450 fs/namespace.c:1417 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3); *** DEADLOCK *** 2 locks held by syz-executor/7562: #0: ffff8880574ec0e0 (&type->s_umount_key#81){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff8880574ec0e0 (&type->s_umount_key#81){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff8880574ec0e0 (&type->s_umount_key#81){+.+.}-{4:4}, at: deactivate_super fs/super.c:506 [inline] #0: ffff8880574ec0e0 (&type->s_umount_key#81){+.+.}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:503 #1: ffff8880381a2640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #1: ffff8880381a2640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_flush_truncate_log+0x42/0x70 fs/ocfs2/alloc.c:6083 stack backtrace: CPU: 0 UID: 0 PID: 7562 Comm: syz-executor Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_write+0x92/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] __ocfs2_flush_truncate_log+0x31e/0x1160 fs/ocfs2/alloc.c:6054 ocfs2_flush_truncate_log+0x4a/0x70 fs/ocfs2/alloc.c:6084 ocfs2_sync_fs+0x1c6/0x3d0 fs/ocfs2/super.c:406 sync_filesystem+0x1d0/0x290 fs/sync.c:66 generic_shutdown_super+0x74/0x390 fs/super.c:622 kill_block_super+0x3b/0x90 fs/super.c:1755 deactivate_locked_super+0xc1/0x1a0 fs/super.c:474 deactivate_super fs/super.c:507 [inline] deactivate_super+0xde/0x100 fs/super.c:503 cleanup_mnt+0x225/0x450 fs/namespace.c:1417 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0f4d18fcd7 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:00007ffc233e8cb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f0f4d210a8d RCX: 00007f0f4d18fcd7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc233e8d70 RBP: 00007ffc233e8d70 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc233e9e00 R13: 00007f0f4d210a8d R14: 0000000000055831 R15: 00007ffc233e9e40 (syz-executor,7562,1):ocfs2_inode_is_valid_to_delete:885 ERROR: Skipping delete of system file 72 ocfs2: Unmounting device (7,7) on (node local)