======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.1.234/7137 is trying to acquire lock:
ffff888060b245d8 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline]
ffff888060b245d8 (&ni->ni_lock/5){+.+.}-{4:4}, at: attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976

but task is already holding lock:
ffff888060b24a70 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
ffff888060b24a70 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: filemap_fault+0x6e0/0x13c0 mm/filemap.c:3585

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (mapping.invalidate_lock#9){.+.+}-{4:4}:
       down_read+0x97/0x200 kernel/locking/rwsem.c:1574
       filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
       filemap_fault+0x6e0/0x13c0 mm/filemap.c:3585
       __do_fault+0x138/0x2a0 mm/memory.c:5565
       do_read_fault mm/memory.c:6000 [inline]
       do_fault mm/memory.c:6134 [inline]
       do_pte_missing+0x1828/0x28f0 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

-> #2 (vm_lock){++++}-{0:0}:
       __vma_start_exclude_readers+0x283/0x930 mm/mmap_lock.c:125
       __vma_start_write+0xdc/0x290 mm/mmap_lock.c:148
       vma_start_write include/linux/mmap_lock.h:303 [inline]
       mprotect_fixup+0x657/0xad0 mm/mprotect.c:836
       setup_arg_pages+0x658/0xbd0 fs/exec.c:675
       load_elf_binary+0xc6d/0x28f0 fs/binfmt_elf.c:1028
       search_binary_handler fs/exec.c:1759 [inline]
       exec_binprm fs/exec.c:1791 [inline]
       bprm_execve+0x930/0x1590 fs/exec.c:1847
       kernel_execve+0x8c3/0x9c0 fs/exec.c:1991
       try_to_run_init_process+0x13/0x60 init/main.c:1486
       kernel_init+0xb2/0x1d0 init/main.c:1616
       ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

-> #1 (&mm->mmap_lock){++++}-{4:4}:
       down_read_killable+0xa4/0x220 kernel/locking/rwsem.c:1599
       mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:609
       get_mmap_lock_carefully mm/mmap_lock.c:450 [inline]
       lock_mm_and_find_vma+0x2d6/0x340 mm/mmap_lock.c:501
       do_user_addr_fault+0x343/0x1340 arch/x86/mm/fault.c:1366
       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
       filldir+0x2bd/0x630 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_getdents fs/readdir.c:319 [inline]
       __se_sys_getdents+0xf1/0x270 fs/readdir.c:304
       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

-> #0 (&ni->ni_lock/5){+.+.}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3181 [inline]
       check_prevs_add kernel/locking/lockdep.c:3300 [inline]
       validate_chain kernel/locking/lockdep.c:3924 [inline]
       __lock_acquire+0x15ff/0x2e40 kernel/locking/lockdep.c:5254
       lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5908
       __mutex_lock_common kernel/locking/rtmutex_api.c:559 [inline]
       mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:578
       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_read_folio+0x638/0x970 fs/iomap/buffered-io.c:675
       ntfs_read_folio+0x3f1/0x4b0 fs/ntfs3/inode.c:856
       filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2520
       filemap_fault+0xd12/0x13c0 mm/filemap.c:3689
       __do_fault+0x138/0x2a0 mm/memory.c:5565
       do_read_fault mm/memory.c:6000 [inline]
       do_fault mm/memory.c:6134 [inline]
       do_pte_missing+0x1828/0x28f0 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

other info that might help us debug this:

Chain exists of:
  &ni->ni_lock/5 --> vm_lock --> mapping.invalidate_lock#9

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(mapping.invalidate_lock#9);
                               lock(vm_lock);
                               lock(mapping.invalidate_lock#9);
  lock(&ni->ni_lock/5);

 *** DEADLOCK ***

locks held by syz.1.234/7137: 1, last CPU#1:
 #0: ffff888060b24a70 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
 #0: ffff888060b24a70 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: filemap_fault+0x6e0/0x13c0 mm/filemap.c:3585

stack backtrace:
CPU: 1 UID: 0 PID: 7137 Comm: syz.1.234 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:2059
 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2191
 check_prev_add kernel/locking/lockdep.c:3181 [inline]
 check_prevs_add kernel/locking/lockdep.c:3300 [inline]
 validate_chain kernel/locking/lockdep.c:3924 [inline]
 __lock_acquire+0x15ff/0x2e40 kernel/locking/lockdep.c:5254
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5908
 __mutex_lock_common kernel/locking/rtmutex_api.c:559 [inline]
 mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:578
 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_read_folio+0x638/0x970 fs/iomap/buffered-io.c:675
 ntfs_read_folio+0x3f1/0x4b0 fs/ntfs3/inode.c:856
 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2520
 filemap_fault+0xd12/0x13c0 mm/filemap.c:3689
 __do_fault+0x138/0x2a0 mm/memory.c:5565
 do_read_fault mm/memory.c:6000 [inline]
 do_fault mm/memory.c:6134 [inline]
 do_pte_missing+0x1828/0x28f0 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
RIP: 0033:0x7f23ef29cef9
Code: f8 77 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 89 f8 48 89 fa c5 f9 ef c0 25 ff 0f 00 00 3d e0 0f 00 00 0f 87 27 01 00 00 <c5> fd 74 0f c5 fd d7 c1 85 c0 74 5b f3 0f bc c0 e9 30 01 00 00 66
RSP: 002b:00007f23ed515e58 EFLAGS: 00010287
RAX: 0000000000000040 RBX: 00007f23ed515ee0 RCX: 0000000000000000
RDX: 0000200000001040 RSI: 0000200000000f00 RDI: 0000200000001040
RBP: 0000200000000f40 R08: 0000200000000000 R09: 0000000000000000
R10: 0000200000000f40 R11: 0000000000000246 R12: 0000200000000f00
R13: 00007f23ed515ea0 R14: 0000000000000000 R15: 0000200000001040
 </TASK>