ntfs3(loop0): failed to convert "0080" to macinuit
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.38/6109 is trying to acquire lock:
ffff88806491e168 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
ffff88806491e168 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: do_page_cache_ra mm/readahead.c:347 [inline]
ffff88806491e168 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: page_cache_ra_order+0x2b1/0x4a0 mm/readahead.c:558

but task is already holding lock:
ffff888032a7a738 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline]
ffff888032a7a738 (&ni->ni_lock/5){+.+.}-{4:4}, at: ntfs_readdir+0x717/0xf70 fs/ntfs3/dir.c:541

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&ni->ni_lock/5){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/rtmutex_api.c:561 [inline]
       mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:580
       ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline]
       attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976
       ntfs_iomap_begin+0x4f0/0xf30 fs/ntfs3/inode.c:978
       iomap_iter_next include/linux/iomap.h:382 [inline]
       ntfs_iomap_next+0x5b6/0x880 fs/ntfs3/inode.c:2319
       iomap_iter+0xe2/0xec0 fs/iomap/iter.c:122
       iomap_readahead+0x3e9/0xe80 fs/iomap/buffered-io.c:751
       ntfs_readahead+0x193/0x210 fs/ntfs3/inode.c:880
       read_pages+0x193/0x5a0 mm/readahead.c:174
       page_cache_ra_unbounded+0x679/0x8f0 mm/readahead.c:315
       do_page_cache_ra mm/readahead.c:348 [inline]
       page_cache_ra_order+0x2c1/0x4a0 mm/readahead.c:558
       do_sync_mmap_readahead+0x4d6/0x7c0 mm/filemap.c:3443
       filemap_fault+0x7e2/0x13c0 mm/filemap.c:3597
       __do_fault+0x138/0x2a0 mm/memory.c:5565
       do_shared_fault mm/memory.c:6064 [inline]
       do_fault mm/memory.c:6138 [inline]
       do_pte_missing+0x659/0x28f0 mm/memory.c:4700
       handle_pte_fault mm/memory.c:6558 [inline]
       __handle_mm_fault mm/memory.c:6707 [inline]
       handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876
       do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343
       handle_page_fault arch/x86/mm/fault.c:1483 [inline]
       exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
       asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595

-> #0 (mapping.invalidate_lock#3){.+.+}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3209 [inline]
       check_prevs_add kernel/locking/lockdep.c:3328 [inline]
       validate_chain kernel/locking/lockdep.c:3952 [inline]
       __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
       lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
       down_read+0x97/0x200 kernel/locking/rwsem.c:1574
       filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
       do_page_cache_ra mm/readahead.c:347 [inline]
       page_cache_ra_order+0x2b1/0x4a0 mm/readahead.c:558
       do_sync_mmap_readahead+0x4d6/0x7c0 mm/filemap.c:3443
       filemap_fault+0x7e2/0x13c0 mm/filemap.c:3597
       __do_fault+0x138/0x2a0 mm/memory.c:5565
       do_shared_fault mm/memory.c:6064 [inline]
       do_fault mm/memory.c:6138 [inline]
       do_pte_missing+0x659/0x28f0 mm/memory.c:4700
       handle_pte_fault mm/memory.c:6558 [inline]
       __handle_mm_fault mm/memory.c:6707 [inline]
       handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876
       do_user_addr_fault+0x746/0x1340 arch/x86/mm/fault.c:1394
       handle_page_fault arch/x86/mm/fault.c:1483 [inline]
       exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
       asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
       filldir64+0x2d4/0x620 fs/readdir.c:-1
       dir_emit include/linux/fs.h:3607 [inline]
       ntfs_dir_emit fs/ntfs3/dir.c:388 [inline]
       ntfs_read_hdr+0x8a7/0xc10 fs/ntfs3/dir.c:429
       ntfs_readdir+0x9ab/0xf70 fs/ntfs3/dir.c:589
       iterate_dir+0x2f1/0x4e0 fs/readdir.c:110
       __do_sys_getdents64 fs/readdir.c:399 [inline]
       __se_sys_getdents64+0xf1/0x280 fs/readdir.c:384
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ni->ni_lock/5);
                               lock(mapping.invalidate_lock#3);
                               lock(&ni->ni_lock/5);
  rlock(mapping.invalidate_lock#3);

 *** DEADLOCK ***

locks held by syz.0.38/6109: 3, last CPU#0:
 #0: ffff888031dd0528 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x252/0x320 fs/file.c:1259
 #1: ffff888032a7aa00 (&type->i_mutex_dir_key#11){++++}-{4:4}, at: iterate_dir+0x215/0x4e0 fs/readdir.c:103
 #2: ffff888032a7a738 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline]
 #2: ffff888032a7a738 (&ni->ni_lock/5){+.+.}-{4:4}, at: ntfs_readdir+0x717/0xf70 fs/ntfs3/dir.c:541

stack backtrace:
CPU: 0 UID: 0 PID: 6109 Comm: syz.0.38 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087
 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219
 check_prev_add kernel/locking/lockdep.c:3209 [inline]
 check_prevs_add kernel/locking/lockdep.c:3328 [inline]
 validate_chain kernel/locking/lockdep.c:3952 [inline]
 __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
 down_read+0x97/0x200 kernel/locking/rwsem.c:1574
 filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
 do_page_cache_ra mm/readahead.c:347 [inline]
 page_cache_ra_order+0x2b1/0x4a0 mm/readahead.c:558
 do_sync_mmap_readahead+0x4d6/0x7c0 mm/filemap.c:3443
 filemap_fault+0x7e2/0x13c0 mm/filemap.c:3597
 __do_fault+0x138/0x2a0 mm/memory.c:5565
 do_shared_fault mm/memory.c:6064 [inline]
 do_fault mm/memory.c:6138 [inline]
 do_pte_missing+0x659/0x28f0 mm/memory.c:4700
 handle_pte_fault mm/memory.c:6558 [inline]
 __handle_mm_fault mm/memory.c:6707 [inline]
 handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876
 do_user_addr_fault+0x746/0x1340 arch/x86/mm/fault.c:1394
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0010:filldir64+0x2d4/0x620 fs/readdir.c:371
Code: ff df 48 8b 44 24 58 48 89 03 8b 4c 24 04 48 8d 43 10 66 89 08 8b 4c 24 14 80 e1 0f 48 8d 43 12 88 08 4a 8d 04 2b 48 83 c0 13 <c6> 00 00 48 89 5c 24 28 4c 8d 7b 13 41 83 fe 07 76 41 4d 89 e6 49
RSP: 0018:ffffc9000622fab0 EFLAGS: 00050216
RAX: 0000200000001000 RBX: 0000200000000fe8 RCX: 0000000000000004
RDX: 0000000000000002 RSI: 0000000000000005 RDI: 0000000000000007
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1004f2a001 R12: ffff888064596000
R13: 0000000000000005 R14: 0000000000000005 R15: 0000200000000fc8
 dir_emit include/linux/fs.h:3607 [inline]
 ntfs_dir_emit fs/ntfs3/dir.c:388 [inline]
 ntfs_read_hdr+0x8a7/0xc10 fs/ntfs3/dir.c:429
 ntfs_readdir+0x9ab/0xf70 fs/ntfs3/dir.c:589
 iterate_dir+0x2f1/0x4e0 fs/readdir.c:110
 __do_sys_getdents64 fs/readdir.c:399 [inline]
 __se_sys_getdents64+0xf1/0x280 fs/readdir.c:384
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4a630ee159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4a61304028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f4a63376180 RCX: 00007f4a630ee159
RDX: 0000000000001000 RSI: 0000200000000f80 RDI: 000000000000000a
RBP: 00007f4a6318503b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4a63376218 R14: 00007f4a63376180 R15: 00007fffe7f17c08
 </TASK>
ntfs3(loop0): failed to convert name for inode 1e.
ntfs3(loop0): ino=1f, mi_enum_attr
----------------
Code disassembly (best guess):
   0:	ff                   	lcall  (bad)
   1:	df 48 8b             	fisttps -0x75(%rax)
   4:	44 24 58             	rex.R and $0x58,%al
   7:	48 89 03             	mov    %rax,(%rbx)
   a:	8b 4c 24 04          	mov    0x4(%rsp),%ecx
   e:	48 8d 43 10          	lea    0x10(%rbx),%rax
  12:	66 89 08             	mov    %cx,(%rax)
  15:	8b 4c 24 14          	mov    0x14(%rsp),%ecx
  19:	80 e1 0f             	and    $0xf,%cl
  1c:	48 8d 43 12          	lea    0x12(%rbx),%rax
  20:	88 08                	mov    %cl,(%rax)
  22:	4a 8d 04 2b          	lea    (%rbx,%r13,1),%rax
  26:	48 83 c0 13          	add    $0x13,%rax
* 2a:	c6 00 00             	movb   $0x0,(%rax) <-- trapping instruction
  2d:	48 89 5c 24 28       	mov    %rbx,0x28(%rsp)
  32:	4c 8d 7b 13          	lea    0x13(%rbx),%r15
  36:	41 83 fe 07          	cmp    $0x7,%r14d
  3a:	76 41                	jbe    0x7d
  3c:	4d 89 e6             	mov    %r12,%r14
  3f:	49                   	rex.WB