====================================================== WARNING: possible circular locking dependency detected 6.17.0-rc1-syzkaller-00016-g8742b2d8935f #0 Tainted: G W ------------------------------------------------------ syz.0.39/6202 is trying to acquire lock: ffff8880330aa250 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff88805b6698d0 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_extend_mft+0x13d/0x450 fs/ntfs3/fsntfs.c:511 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->file.run_lock#2){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_read+0x97/0x1f0 kernel/locking/rwsem.c:1537 run_unpack_ex+0x7e5/0xba0 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x232b/0x37c0 fs/ntfs3/inode.c:540 ntfs_dir_emit fs/ntfs3/dir.c:337 [inline] ntfs_read_hdr+0x7cf/0xc30 fs/ntfs3/dir.c:385 ntfs_readdir+0xa5f/0xdd0 fs/ntfs3/dir.c:496 iterate_dir+0x3a2/0x580 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:326 [inline] __se_sys_getdents+0xe4/0x250 fs/readdir.c:312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&wnd->rw_lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write_nested+0x3e/0x60 kernel/locking/rwsem.c:1706 ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c1/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a4/0x2c70 fs/ntfs3/attrib.c:574 ntfs_extend_mft+0x162/0x450 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x5f8/0xd50 fs/ntfs3/fsntfs.c:709 ni_create_attr_list+0x8ff/0x13d0 fs/ntfs3/frecord.c:826 ni_ins_attr_ext+0x43e/0xb50 fs/ntfs3/frecord.c:924 ni_insert_attr fs/ntfs3/frecord.c:1091 [inline] ni_insert_resident fs/ntfs3/frecord.c:1475 [inline] ni_add_name+0x6df/0xc90 fs/ntfs3/frecord.c:2987 ni_rename+0x4a/0x100 fs/ntfs3/frecord.c:3026 ntfs_rename+0x735/0xbf0 fs/ntfs3/namei.c:332 vfs_rename+0xbd7/0xf00 fs/namei.c:5129 do_renameat2+0x6ce/0xa80 fs/namei.c:5278 __do_sys_rename fs/namei.c:5325 [inline] __se_sys_rename fs/namei.c:5323 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5323 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); *** DEADLOCK *** 7 locks held by syz.0.39/6202: #0: ffff8880330a8488 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557 #1: ffff88805b66e868 (&type->i_mutex_dir_key#10/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline] #1: ffff88805b66e868 (&type->i_mutex_dir_key#10/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3272 [inline] #1: ffff88805b66e868 (&type->i_mutex_dir_key#10/1){+.+.}-{4:4}, at: do_renameat2+0x3b9/0xa80 fs/namei.c:5224 #2: ffff88805b66f028 (&sb->s_type->i_mutex_key#26/4){+.+.}-{4:4}, at: vfs_rename+0x6d8/0xf00 fs/namei.c:5100 #3: ffff88805b66e5b0 (&ni->ni_lock#2/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1118 [inline] #3: ffff88805b66e5b0 (&ni->ni_lock#2/6){+.+.}-{4:4}, at: ntfs_rename+0x6de/0xbf0 fs/ntfs3/namei.c:327 #4: ffff88805b66ed70 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] #4: ffff88805b66ed70 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_rename+0x6f7/0xbf0 fs/ntfs3/namei.c:328 #5: ffff8880330aa118 (&wnd->rw_lock/1){+.+.}-{4:4}, at: ntfs_look_free_mft+0x163/0xd50 fs/ntfs3/fsntfs.c:571 #6: ffff88805b6698d0 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_extend_mft+0x13d/0x450 fs/ntfs3/fsntfs.c:511 stack backtrace: CPU: 0 UID: 0 PID: 6202 Comm: syz.0.39 Tainted: G W 6.17.0-rc1-syzkaller-00016-g8742b2d8935f #0 PREEMPT_{RT,(full)} Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write_nested+0x3e/0x60 kernel/locking/rwsem.c:1706 ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c1/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a4/0x2c70 fs/ntfs3/attrib.c:574 ntfs_extend_mft+0x162/0x450 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x5f8/0xd50 fs/ntfs3/fsntfs.c:709 ni_create_attr_list+0x8ff/0x13d0 fs/ntfs3/frecord.c:826 ni_ins_attr_ext+0x43e/0xb50 fs/ntfs3/frecord.c:924 ni_insert_attr fs/ntfs3/frecord.c:1091 [inline] ni_insert_resident fs/ntfs3/frecord.c:1475 [inline] ni_add_name+0x6df/0xc90 fs/ntfs3/frecord.c:2987 ni_rename+0x4a/0x100 fs/ntfs3/frecord.c:3026 ntfs_rename+0x735/0xbf0 fs/ntfs3/namei.c:332 vfs_rename+0xbd7/0xf00 fs/namei.c:5129 do_renameat2+0x6ce/0xa80 fs/namei.c:5278 __do_sys_rename fs/namei.c:5325 [inline] __se_sys_rename fs/namei.c:5323 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5323 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f92324eebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9230756038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f9232715fa0 RCX: 00007f92324eebe9 RDX: 0000000000000000 RSI: 0000200000000400 RDI: 0000200000006200 RBP: 00007f9232571e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9232716038 R14: 00007f9232715fa0 R15: 00007ffe48e0ca78 ntfs3(loop0): ino=0, attr_set_size ntfs3(loop0): Mark volume as dirty due to NTFS errors