======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.8.630/10594 is trying to acquire lock:
ffff888069268888 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1222 [inline]
ffff888069268888 (&ni->ni_lock/5){+.+.}-{4:4}, at: attr_data_get_block+0x1bf/0x2a0 fs/ntfs3/attrib.c:976

but task is already holding lock:
ffff888069268d10 (mapping.invalidate_lock#13){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
ffff888069268d10 (mapping.invalidate_lock#13){.+.+}-{4:4}, at: filemap_fault+0x6e0/0x13c0 mm/filemap.c:3570

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (mapping.invalidate_lock#13){.+.+}-{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:3570
       __do_fault+0x138/0x2a0 mm/memory.c:5425
       do_read_fault mm/memory.c:5860 [inline]
       do_fault mm/memory.c:5994 [inline]
       do_pte_missing+0x1828/0x28f0 mm/memory.c:4566
       handle_pte_fault mm/memory.c:6379 [inline]
       __handle_mm_fault mm/memory.c:6517 [inline]
       handle_mm_fault+0xd28/0x13f0 mm/memory.c:6686
       do_user_addr_fault+0xa4d/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+0x761/0xb10 mm/mprotect.c:801
       setup_arg_pages+0x658/0xbd0 fs/exec.c:674
       load_elf_binary+0xc85/0x2970 fs/binfmt_elf.c:1028
       search_binary_handler fs/exec.c:1694 [inline]
       exec_binprm fs/exec.c:1726 [inline]
       bprm_execve+0x926/0x14b0 fs/exec.c:1778
       kernel_execve+0x8c3/0x9c0 fs/exec.c:1922
       try_to_run_init_process+0x13/0x60 init/main.c:1476
       kernel_init+0xad/0x1d0 init/main.c:1604
       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:601
       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+0x341/0x1340 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+0x2b2/0x630 fs/readdir.c:-1
       dir_emit include/linux/fs.h:3587 [inline]
       ntfs_dir_emit fs/ntfs3/dir.c:346 [inline]
       ntfs_read_hdr+0x8a4/0xc10 fs/ntfs3/dir.c:387
       ntfs_readdir+0x9ea/0xec0 fs/ntfs3/dir.c:547
       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:63 [inline]
       do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ni->ni_lock/5){+.+.}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x1520/0x2ce0 kernel/locking/lockdep.c:5237
       lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
       __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:1222 [inline]
       attr_data_get_block+0x1bf/0x2a0 fs/ntfs3/attrib.c:976
       ntfs_iomap_begin+0x4f0/0xf10 fs/ntfs3/inode.c:771
       iomap_iter+0x5f5/0xf80 fs/iomap/iter.c:110
       iomap_read_folio+0x638/0x970 fs/iomap/buffered-io.c:669
       ntfs_read_folio+0x3f1/0x4b0 fs/ntfs3/inode.c:649
       filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2510
       filemap_fault+0xd12/0x13c0 mm/filemap.c:3674
       __do_fault+0x138/0x2a0 mm/memory.c:5425
       do_read_fault mm/memory.c:5860 [inline]
       do_fault mm/memory.c:5994 [inline]
       do_pte_missing+0x1828/0x28f0 mm/memory.c:4566
       handle_pte_fault mm/memory.c:6379 [inline]
       __handle_mm_fault mm/memory.c:6517 [inline]
       handle_mm_fault+0xd28/0x13f0 mm/memory.c:6686
       do_user_addr_fault+0xa4d/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#13

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(mapping.invalidate_lock#13);
                               lock(vm_lock);
                               lock(mapping.invalidate_lock#13);
  lock(&ni->ni_lock/5);

 *** DEADLOCK ***

1 lock held by syz.8.630/10594:
 #0: ffff888069268d10 (mapping.invalidate_lock#13){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
 #0: ffff888069268d10 (mapping.invalidate_lock#13){.+.+}-{4:4}, at: filemap_fault+0x6e0/0x13c0 mm/filemap.c:3570

stack backtrace:
CPU: 0 UID: 0 PID: 10594 Comm: syz.8.630 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043
 check_noncircular+0x12e/0x150 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 kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x1520/0x2ce0 kernel/locking/lockdep.c:5237
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 __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:1222 [inline]
 attr_data_get_block+0x1bf/0x2a0 fs/ntfs3/attrib.c:976
 ntfs_iomap_begin+0x4f0/0xf10 fs/ntfs3/inode.c:771
 iomap_iter+0x5f5/0xf80 fs/iomap/iter.c:110
 iomap_read_folio+0x638/0x970 fs/iomap/buffered-io.c:669
 ntfs_read_folio+0x3f1/0x4b0 fs/ntfs3/inode.c:649
 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2510
 filemap_fault+0xd12/0x13c0 mm/filemap.c:3674
 __do_fault+0x138/0x2a0 mm/memory.c:5425
 do_read_fault mm/memory.c:5860 [inline]
 do_fault mm/memory.c:5994 [inline]
 do_pte_missing+0x1828/0x28f0 mm/memory.c:4566
 handle_pte_fault mm/memory.c:6379 [inline]
 __handle_mm_fault mm/memory.c:6517 [inline]
 handle_mm_fault+0xd28/0x13f0 mm/memory.c:6686
 do_user_addr_fault+0xa4d/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: 0033:0x7fcd3aab9b15
Code: 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 49 39 f0 0f 84 22 07 00 00 48 83 c6 01 48 89 b4 24 38 01 00 00 <41> 0f b6 44 32 ff 48 d3 e0 83 c1 08 89 8c 24 44 01 00 00 48 09 c2
RSP: 002b:00007fcd38e554c0 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000000da7 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000da7 R09: 0000000000000008
R10: 0000200000001742 R11: 0000000000000246 R12: 0000000000000006
R13: 00007fcd38e55ee0 R14: 00007fcd38e55ea0 R15: 00007fcd30a15000
 </TASK>