======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.1.461/10847 is trying to acquire lock:
ffff88802b818538 (mapping.invalidate_lock#3){++++}-{4:4}, at: filemap_fault+0x548/0x1200

but task is already holding lock:
ffff88810ef08ca0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x16f/0x380

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&mm->mmap_lock){++++}-{4:4}:
       lock_acquire+0x120/0x360
       __might_fault+0xcc/0x130
       _copy_to_user+0x2c/0xb0
       fiemap_fill_next_extent+0x1c0/0x390
       ni_fiemap+0x89c/0xbf0
       ntfs_fiemap+0x11d/0x1a0
       do_vfs_ioctl+0x1173/0x1430
       __se_sys_ioctl+0x82/0x170
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ni->ni_lock/5){+.+.}-{4:4}:
       lock_acquire+0x120/0x360
       __mutex_lock+0x187/0x1350
       attr_data_get_block+0x2ec/0x1ec0
       ntfs_get_block_vbo+0x392/0xc30
       do_mpage_readpage+0x870/0x19a0
       mpage_readahead+0x398/0x650
       read_pages+0x17a/0x580
       page_cache_ra_unbounded+0x6b0/0x7b0
       filemap_get_pages+0xb22/0x1ea0
       filemap_read+0x3f6/0x11a0
       __kernel_read+0x4cf/0x960
       integrity_kernel_read+0x89/0xd0
       ima_calc_file_hash+0x85e/0x16f0
       ima_collect_measurement+0x428/0x8e0
       process_measurement+0x1121/0x1a40
       ima_file_check+0xd7/0x120
       security_file_post_open+0xbb/0x290
       path_openat+0x2f26/0x3830
       do_filp_open+0x1fa/0x410
       do_sys_openat2+0x121/0x1c0
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (mapping.invalidate_lock#3){++++}-{4:4}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       filemap_fault+0x548/0x1200
       __do_fault+0x138/0x390
       __handle_mm_fault+0x3611/0x5440
       handle_mm_fault+0x40a/0x8e0
       __get_user_pages+0x1699/0x2ce0
       populate_vma_page_range+0x29f/0x3a0
       __mm_populate+0x24c/0x380
       vm_mmap_pgoff+0x387/0x4d0
       ksys_mmap_pgoff+0x51f/0x760
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  mapping.invalidate_lock#3 --> &ni->ni_lock/5 --> &mm->mmap_lock

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

1 lock held by syz.1.461/10847:
 #0: ffff88810ef08ca0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x16f/0x380

stack backtrace:
CPU: 1 UID: 0 PID: 10847 Comm: syz.1.461 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_circular_bug+0x2ee/0x310
 check_noncircular+0x134/0x160
 validate_chain+0xb9b/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 down_read+0x46/0x2e0
 filemap_fault+0x548/0x1200
 __do_fault+0x138/0x390
 __handle_mm_fault+0x3611/0x5440
 handle_mm_fault+0x40a/0x8e0
 __get_user_pages+0x1699/0x2ce0
 populate_vma_page_range+0x29f/0x3a0
 __mm_populate+0x24c/0x380
 vm_mmap_pgoff+0x387/0x4d0
 ksys_mmap_pgoff+0x51f/0x760
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc978b8ec29
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:00007fc979aa4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fc978dd5fa0 RCX: 00007fc978b8ec29
RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fc978c11e41 R08: 0000000000000008 R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc978dd6038 R14: 00007fc978dd5fa0 R15: 00007ffe1c69afb8
 </TASK>
