====================================================== WARNING: possible circular locking dependency detected 5.15.159-syzkaller #0 Not tainted ------------------------------------------------------ kworker/u4:6/3618 is trying to acquire lock: ffff88801e9a6120 (&wnd->rw_lock/1){+.+.}-{3:3}, at: ntfs_mark_rec_free+0x33/0x250 fs/ntfs3/fsntfs.c:711 but task is already holding lock: ffff88805e05f700 (&ni->ni_lock){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1113 [inline] ffff88805e05f700 (&ni->ni_lock){+.+.}-{3:3}, at: ni_write_inode+0x16b/0x1070 fs/ntfs3/frecord.c:3198 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->ni_lock){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ntfs_set_state+0x1fa/0x660 fs/ntfs3/fsntfs.c:925 mi_read+0x49a/0x5a0 fs/ntfs3/record.c:185 mi_format_new+0x1a7/0x5c0 fs/ntfs3/record.c:374 ni_add_subrecord+0xde/0x430 fs/ntfs3/frecord.c:370 ntfs_look_free_mft+0x7f1/0xff0 fs/ntfs3/fsntfs.c:686 ni_create_attr_list+0x9b6/0x1470 fs/ntfs3/frecord.c:848 ni_ins_attr_ext+0x364/0xb30 fs/ntfs3/frecord.c:949 ni_insert_attr fs/ntfs3/frecord.c:1103 [inline] ni_insert_resident fs/ntfs3/frecord.c:1477 [inline] ni_add_name+0x689/0x9d0 fs/ntfs3/frecord.c:2983 ni_rename+0xbe/0x1e0 fs/ntfs3/frecord.c:3023 ntfs_rename+0x74a/0xd40 fs/ntfs3/namei.c:318 vfs_rename+0xd32/0x10f0 fs/namei.c:4832 do_renameat2+0xe0f/0x1700 fs/namei.c:4985 __do_sys_rename fs/namei.c:5031 [inline] __se_sys_rename fs/namei.c:5029 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5029 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&wnd->rw_lock/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write_nested+0x3b/0x60 kernel/locking/rwsem.c:1667 ntfs_mark_rec_free+0x33/0x250 fs/ntfs3/fsntfs.c:711 ni_write_inode+0x504/0x1070 fs/ntfs3/frecord.c:3293 write_inode fs/fs-writeback.c:1495 [inline] __writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1705 writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1930 wb_writeback+0x451/0xc50 fs/fs-writeback.c:2104 wb_do_writeback fs/fs-writeback.c:2247 [inline] wb_workfn+0x46c/0x1130 fs/fs-writeback.c:2288 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock); lock(&wnd->rw_lock/1); lock(&ni->ni_lock); lock(&wnd->rw_lock/1); *** DEADLOCK *** 3 locks held by kworker/u4:6/3618: #0: ffff888014bfd938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc900030b7d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 #2: ffff88805e05f700 (&ni->ni_lock){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1113 [inline] #2: ffff88805e05f700 (&ni->ni_lock){+.+.}-{3:3}, at: ni_write_inode+0x16b/0x1070 fs/ntfs3/frecord.c:3198 stack backtrace: CPU: 1 PID: 3618 Comm: kworker/u4:6 Not tainted 5.15.159-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: writeback wb_workfn (flush-7:0) Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write_nested+0x3b/0x60 kernel/locking/rwsem.c:1667 ntfs_mark_rec_free+0x33/0x250 fs/ntfs3/fsntfs.c:711 ni_write_inode+0x504/0x1070 fs/ntfs3/frecord.c:3293 write_inode fs/fs-writeback.c:1495 [inline] __writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1705 writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1930 wb_writeback+0x451/0xc50 fs/fs-writeback.c:2104 wb_do_writeback fs/fs-writeback.c:2247 [inline] wb_workfn+0x46c/0x1130 fs/fs-writeback.c:2288 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300