loop5: detected capacity change from 0 to 4096
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.5.4080/28029 is trying to acquire lock:
ffff88804d4379b8 (mapping.invalidate_lock#5){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline]
ffff88804d4379b8 (mapping.invalidate_lock#5){++++}-{4:4}, at: filemap_fault+0x5d0/0x12b0 mm/filemap.c:3477

but task is already holding lock:
ffff8880255757e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:368 [inline]
ffff8880255757e0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x16f/0x380 mm/gup.c:1942

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 kernel/locking/lockdep.c:5868
       __might_fault+0xcc/0x130 mm/memory.c:7081
       _inline_copy_to_user include/linux/uaccess.h:192 [inline]
       _copy_to_user+0x2c/0xb0 lib/usercopy.c:26
       copy_to_user include/linux/uaccess.h:225 [inline]
       fiemap_fill_next_extent+0x1c0/0x390 fs/ioctl.c:144
       ni_fiemap+0x391/0xbf0 fs/ntfs3/frecord.c:1896
       ntfs_fiemap+0x11d/0x1a0 fs/ntfs3/file.c:1354
       ioctl_fiemap fs/ioctl.c:219 [inline]
       do_vfs_ioctl+0x1173/0x1430 fs/ioctl.c:531
       __do_sys_ioctl fs/ioctl.c:595 [inline]
       __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ni->ni_lock#2/5){+.+.}-{4:4}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
       __mutex_lock_common kernel/locking/mutex.c:598 [inline]
       __mutex_lock+0x187/0x1350 kernel/locking/mutex.c:760
       ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline]
       ntfs_fallocate+0x57a/0x10b0 fs/ntfs3/file.c:589
       vfs_fallocate+0x669/0x7e0 fs/open.c:342
       madvise_remove mm/madvise.c:1049 [inline]
       madvise_vma_behavior+0x31b3/0x3a10 mm/madvise.c:1346
       madvise_walk_vmas+0x51c/0xa30 mm/madvise.c:1669
       madvise_do_behavior+0x38e/0x550 mm/madvise.c:1885
       do_madvise+0x1bc/0x270 mm/madvise.c:1978
       __do_sys_madvise mm/madvise.c:1987 [inline]
       __se_sys_madvise mm/madvise.c:1985 [inline]
       __x64_sys_madvise+0xa7/0xc0 mm/madvise.c:1985
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (mapping.invalidate_lock#5){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908
       __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537
       filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline]
       filemap_fault+0x5d0/0x12b0 mm/filemap.c:3477
       __do_fault+0x138/0x390 mm/memory.c:5280
       do_read_fault mm/memory.c:5698 [inline]
       do_fault mm/memory.c:5832 [inline]
       do_pte_missing mm/memory.c:4361 [inline]
       handle_pte_fault mm/memory.c:6177 [inline]
       __handle_mm_fault+0x35e3/0x5400 mm/memory.c:6318
       handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487
       faultin_page mm/gup.c:1126 [inline]
       __get_user_pages+0x165c/0x2a00 mm/gup.c:1428
       populate_vma_page_range+0x29f/0x3a0 mm/gup.c:1860
       __mm_populate+0x24c/0x380 mm/gup.c:1963
       mm_populate include/linux/mm.h:3466 [inline]
       vm_mmap_pgoff+0x387/0x4d0 mm/util.c:585
       ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  mapping.invalidate_lock#5 --> &ni->ni_lock#2/5 --> &mm->mmap_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(&mm->mmap_lock);
                               lock(&ni->ni_lock#2/5);
                               lock(&mm->mmap_lock);
  rlock(mapping.invalidate_lock#5);

 *** DEADLOCK ***

1 lock held by syz.5.4080/28029:
 #0: ffff8880255757e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:368 [inline]
 #0: ffff8880255757e0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x16f/0x380 mm/gup.c:1942

stack backtrace:
CPU: 0 UID: 0 PID: 28029 Comm: syz.5.4080 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043
 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908
 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537
 filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline]
 filemap_fault+0x5d0/0x12b0 mm/filemap.c:3477
 __do_fault+0x138/0x390 mm/memory.c:5280
 do_read_fault mm/memory.c:5698 [inline]
 do_fault mm/memory.c:5832 [inline]
 do_pte_missing mm/memory.c:4361 [inline]
 handle_pte_fault mm/memory.c:6177 [inline]
 __handle_mm_fault+0x35e3/0x5400 mm/memory.c:6318
 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x165c/0x2a00 mm/gup.c:1428
 populate_vma_page_range+0x29f/0x3a0 mm/gup.c:1860
 __mm_populate+0x24c/0x380 mm/gup.c:1963
 mm_populate include/linux/mm.h:3466 [inline]
 vm_mmap_pgoff+0x387/0x4d0 mm/util.c:585
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f62c598eec9
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:00007f62c67f7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f62c5be5fa0 RCX: 00007f62c598eec9
RDX: 000000000000000a RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f62c5a11f91 R08: 0000000000000009 R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f62c5be6038 R14: 00007f62c5be5fa0 R15: 00007ffd923959b8
 </TASK>