====================================================== WARNING: possible circular locking dependency detected 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0 Not tainted ------------------------------------------------------ kworker/u17:0/10 is trying to acquire lock: ffff888028e0e120 (&wnd->rw_lock/1){+.+.}-{3:3}, at: ntfs_mark_rec_free+0x229/0x310 fs/ntfs3/fsntfs.c:741 but task is already holding lock: ffff888051d38fc0 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1141 [inline] ffff888051d38fc0 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_write_inode+0x1c0/0x30e0 fs/ntfs3/frecord.c:3252 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ni->ni_lock#2){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747 ntfs_set_state fs/ntfs3/fsntfs.c:945 [inline] ntfs_set_state+0x1d5/0x700 fs/ntfs3/fsntfs.c:919 attr_set_size+0x134e/0x2ac0 fs/ntfs3/attrib.c:866 ntfs_extend_mft+0x296/0x430 fs/ntfs3/fsntfs.c:526 ntfs_look_free_mft+0x548/0xe60 fs/ntfs3/fsntfs.c:589 ni_create_attr_list+0xbdd/0x12c0 fs/ntfs3/frecord.c:873 ni_ins_attr_ext+0x3ca/0xba0 fs/ntfs3/frecord.c:968 ni_insert_attr+0x3ea/0x850 fs/ntfs3/frecord.c:1135 ni_insert_resident+0xd9/0x3a0 fs/ntfs3/frecord.c:1519 ntfs_set_ea+0xa3b/0x1380 fs/ntfs3/xattr.c:433 ntfs_save_wsl_perm+0x12b/0x3d0 fs/ntfs3/xattr.c:944 ntfs3_setattr+0xa2b/0xc30 fs/ntfs3/file.c:708 notify_change+0xb2c/0x1180 fs/attr.c:483 chown_common+0x57f/0x650 fs/open.c:774 do_fchownat+0x12a/0x1e0 fs/open.c:805 ksys_chown include/linux/syscalls.h:1330 [inline] __do_sys_chown16 kernel/uid16.c:25 [inline] __se_sys_chown16 kernel/uid16.c:23 [inline] __ia32_sys_chown16+0xdc/0x110 kernel/uid16.c:23 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> #1 (&ni->file.run_lock#2){++++}-{3:3}: down_write+0x92/0x200 kernel/locking/rwsem.c:1573 ntfs_extend_mft+0x127/0x430 fs/ntfs3/fsntfs.c:510 ntfs_look_free_mft+0x548/0xe60 fs/ntfs3/fsntfs.c:589 ni_create_attr_list+0xbdd/0x12c0 fs/ntfs3/frecord.c:873 ni_ins_attr_ext+0x3ca/0xba0 fs/ntfs3/frecord.c:968 ni_insert_attr+0x3ea/0x850 fs/ntfs3/frecord.c:1135 ni_insert_resident+0xd9/0x3a0 fs/ntfs3/frecord.c:1519 ntfs_set_ea+0xa3b/0x1380 fs/ntfs3/xattr.c:433 ntfs_save_wsl_perm+0x12b/0x3d0 fs/ntfs3/xattr.c:944 ntfs3_setattr+0xa2b/0xc30 fs/ntfs3/file.c:708 notify_change+0xb2c/0x1180 fs/attr.c:483 chown_common+0x57f/0x650 fs/open.c:774 do_fchownat+0x12a/0x1e0 fs/open.c:805 ksys_chown include/linux/syscalls.h:1330 [inline] __do_sys_chown16 kernel/uid16.c:25 [inline] __se_sys_chown16 kernel/uid16.c:23 [inline] __ia32_sys_chown16+0xdc/0x110 kernel/uid16.c:23 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> #0 (&wnd->rw_lock/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3113 [inline] check_prevs_add kernel/locking/lockdep.c:3232 [inline] validate_chain kernel/locking/lockdep.c:3847 [inline] __lock_acquire+0x2fcd/0x5f30 kernel/locking/lockdep.c:5088 lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 down_write_nested+0x96/0x200 kernel/locking/rwsem.c:1689 ntfs_mark_rec_free+0x229/0x310 fs/ntfs3/fsntfs.c:741 ni_write_inode+0x10f1/0x30e0 fs/ntfs3/frecord.c:3348 write_inode fs/fs-writeback.c:1456 [inline] __writeback_single_inode+0x9f2/0xdb0 fs/fs-writeback.c:1668 writeback_sb_inodes+0x54d/0xe70 fs/fs-writeback.c:1894 wb_writeback+0x294/0xa50 fs/fs-writeback.c:2068 wb_do_writeback fs/fs-writeback.c:2211 [inline] wb_workfn+0x2a5/0xfc0 fs/fs-writeback.c:2251 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 other info that might help us debug this: Chain exists of: &wnd->rw_lock/1 --> &ni->file.run_lock#2 --> &ni->ni_lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock#2); lock(&ni->file.run_lock#2); lock(&ni->ni_lock#2); lock(&wnd->rw_lock/1); *** DEADLOCK *** 3 locks held by kworker/u17:0/10: #0: ffff888040121138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888040121138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888040121138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff888040121138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff888040121138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff888040121138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376 #1: ffffc900003c7db0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380 #2: ffff888051d38fc0 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1141 [inline] #2: ffff888051d38fc0 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_write_inode+0x1c0/0x30e0 fs/ntfs3/frecord.c:3252 stack backtrace: CPU: 0 PID: 10 Comm: kworker/u17:0 Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Workqueue: writeback wb_workfn (flush-7:2) Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3113 [inline] check_prevs_add kernel/locking/lockdep.c:3232 [inline] validate_chain kernel/locking/lockdep.c:3847 [inline] __lock_acquire+0x2fcd/0x5f30 kernel/locking/lockdep.c:5088 lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 down_write_nested+0x96/0x200 kernel/locking/rwsem.c:1689 ntfs_mark_rec_free+0x229/0x310 fs/ntfs3/fsntfs.c:741 ni_write_inode+0x10f1/0x30e0 fs/ntfs3/frecord.c:3348 write_inode fs/fs-writeback.c:1456 [inline] __writeback_single_inode+0x9f2/0xdb0 fs/fs-writeback.c:1668 writeback_sb_inodes+0x54d/0xe70 fs/fs-writeback.c:1894 wb_writeback+0x294/0xa50 fs/fs-writeback.c:2068 wb_do_writeback fs/fs-writeback.c:2211 [inline] wb_workfn+0x2a5/0xfc0 fs/fs-writeback.c:2251 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308