======================================================
WARNING: possible circular locking dependency detected
6.12.0-rc6-next-20241106-syzkaller #0 Not tainted
------------------------------------------------------
syz.9.1324/13713 is trying to acquire lock:
ffff88805fab01b0 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x55e/0x9e0 fs/ntfs3/run.c:1119

but task is already holding lock:
ffff88801260c270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x47a/0x9e0 fs/ntfs3/run.c:1100

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&wnd->rw_lock){++++}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       down_write_nested+0xa2/0x220 kernel/locking/rwsem.c:1693
       mark_as_free_ex+0x3e/0x390 fs/ntfs3/fsntfs.c:2484
       run_deallocate_ex+0x244/0x5f0 fs/ntfs3/attrib.c:122
       attr_set_size+0x168d/0x4300 fs/ntfs3/attrib.c:753
       ntfs_truncate fs/ntfs3/file.c:506 [inline]
       ntfs_setattr+0x7a4/0xb80 fs/ntfs3/file.c:824
       notify_change+0xbca/0xe90 fs/attr.c:552
       do_truncate+0x220/0x310 fs/open.c:65
       handle_truncate fs/namei.c:3449 [inline]
       do_open fs/namei.c:3832 [inline]
       path_openat+0x2e1e/0x3590 fs/namei.c:3987
       do_filp_open+0x27f/0x4e0 fs/namei.c:4014
       do_sys_openat2+0x13e/0x1d0 fs/open.c:1402
       do_sys_open fs/open.c:1417 [inline]
       __do_sys_openat fs/open.c:1433 [inline]
       __se_sys_openat fs/open.c:1428 [inline]
       __x64_sys_openat+0x247/0x2a0 fs/open.c:1428
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ni->file.run_lock#2){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3161 [inline]
       check_prevs_add kernel/locking/lockdep.c:3280 [inline]
       validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
       __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
       run_unpack_ex+0x55e/0x9e0 fs/ntfs3/run.c:1119
       ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
       ntfs_iget5+0x1f9a/0x37b0 fs/ntfs3/inode.c:537
       dir_search_u+0x2fe/0x3a0 fs/ntfs3/dir.c:264
       ntfs_lookup+0x106/0x1f0 fs/ntfs3/namei.c:85
       lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1692
       filename_create+0x297/0x540 fs/namei.c:4081
       do_mknodat+0x18b/0x5b0 fs/namei.c:4226
       __do_sys_mknodat fs/namei.c:4267 [inline]
       __se_sys_mknodat fs/namei.c:4264 [inline]
       __x64_sys_mknodat+0xa7/0xc0 fs/namei.c:4264
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&wnd->rw_lock);
                               lock(&ni->file.run_lock#2);
                               lock(&wnd->rw_lock);
  rlock(&ni->file.run_lock#2);

 *** DEADLOCK ***

4 locks held by syz.9.1324/13713:
 #0: ffff888032788420 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
 #1: ffff88805fab2fa8 (&type->i_mutex_dir_key#16/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:852 [inline]
 #1: ffff88805fab2fa8 (&type->i_mutex_dir_key#16/1){+.+.}-{4:4}, at: filename_create+0x260/0x540 fs/namei.c:4080
 #2: ffff88805fab2d10 (&ni->ni_lock/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1115 [inline]
 #2: ffff88805fab2d10 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_lookup+0xf9/0x1f0 fs/ntfs3/namei.c:84
 #3: ffff88801260c270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x47a/0x9e0 fs/ntfs3/run.c:1100

stack backtrace:
CPU: 0 UID: 0 PID: 13713 Comm: syz.9.1324 Not tainted 6.12.0-rc6-next-20241106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
 check_prev_add kernel/locking/lockdep.c:3161 [inline]
 check_prevs_add kernel/locking/lockdep.c:3280 [inline]
 validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
 run_unpack_ex+0x55e/0x9e0 fs/ntfs3/run.c:1119
 ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
 ntfs_iget5+0x1f9a/0x37b0 fs/ntfs3/inode.c:537
 dir_search_u+0x2fe/0x3a0 fs/ntfs3/dir.c:264
 ntfs_lookup+0x106/0x1f0 fs/ntfs3/namei.c:85
 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1692
 filename_create+0x297/0x540 fs/namei.c:4081
 do_mknodat+0x18b/0x5b0 fs/namei.c:4226
 __do_sys_mknodat fs/namei.c:4267 [inline]
 __se_sys_mknodat fs/namei.c:4264 [inline]
 __x64_sys_mknodat+0xa7/0xc0 fs/namei.c:4264
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33e977e719
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:00007f33ea58b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f33e9936058 RCX: 00007f33e977e719
RDX: 00000000000081c0 RSI: 00000000200000c0 RDI: ffffffffffffff9c
RBP: 00007f33e97f139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f33e9936058 R15: 00007ffc1eacf1e8
 </TASK>