======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc7-syzkaller-00050-gfc444ada1310 #0 Not tainted
------------------------------------------------------
syz.4.162/7104 is trying to acquire lock:
ffff888060214318 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1111 [inline]
ffff888060214318 (&ni->ni_lock/5){+.+.}-{4:4}, at: ntfs_fallocate+0x816/0x1270 fs/ntfs3/file.c:666

but task is already holding lock:
ffff888060214750 (mapping.invalidate_lock#12){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:922 [inline]
ffff888060214750 (mapping.invalidate_lock#12){++++}-{4:4}, at: ntfs_fallocate+0x3c4/0x1270 fs/ntfs3/file.c:596

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (mapping.invalidate_lock#12){++++}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
       filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
       filemap_fault+0x615/0x1490 mm/filemap.c:3379
       __do_fault+0x135/0x390 mm/memory.c:4989
       do_read_fault mm/memory.c:5409 [inline]
       do_fault mm/memory.c:5543 [inline]
       do_pte_missing mm/memory.c:4059 [inline]
       handle_pte_fault mm/memory.c:5888 [inline]
       __handle_mm_fault+0x40c6/0x6ef0 mm/memory.c:6031
       handle_mm_fault+0x2c1/0x7e0 mm/memory.c:6200
       do_user_addr_fault arch/x86/mm/fault.c:1388 [inline]
       handle_page_fault arch/x86/mm/fault.c:1480 [inline]
       exc_page_fault+0x2b9/0x8b0 arch/x86/mm/fault.c:1538
       asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
       rep_movs_alternative+0x30/0x70 arch/x86/lib/copy_user_64.S:50
       copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
       raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
       _inline_copy_from_user include/linux/uaccess.h:178 [inline]
       _copy_from_user+0x7b/0xb0 lib/usercopy.c:18
       copy_from_user include/linux/uaccess.h:212 [inline]
       ioctl_fiemap fs/ioctl.c:210 [inline]
       do_vfs_ioctl+0x9cd/0x2770 fs/ioctl.c:840
       __do_sys_ioctl fs/ioctl.c:904 [inline]
       __se_sys_ioctl+0x80/0x170 fs/ioctl.c:892
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&mm->mmap_lock){++++}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       __might_fault+0xc6/0x120 mm/memory.c:6839
       _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+0x235/0x420 fs/ioctl.c:145
       ni_fiemap+0xfec/0x1270 fs/ntfs3/frecord.c:1953
       ntfs_fiemap+0x132/0x180 fs/ntfs3/file.c:1360
       ioctl_fiemap fs/ioctl.c:220 [inline]
       do_vfs_ioctl+0x1981/0x2770 fs/ioctl.c:840
       __do_sys_ioctl fs/ioctl.c:904 [inline]
       __se_sys_ioctl+0x80/0x170 fs/ioctl.c:892
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ni->ni_lock/5){+.+.}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3163 [inline]
       check_prevs_add kernel/locking/lockdep.c:3282 [inline]
       validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
       __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       __mutex_lock_common kernel/locking/mutex.c:585 [inline]
       __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
       ni_lock fs/ntfs3/ntfs_fs.h:1111 [inline]
       ntfs_fallocate+0x816/0x1270 fs/ntfs3/file.c:666
       vfs_fallocate+0x623/0x7a0 fs/open.c:338
       ksys_fallocate fs/open.c:362 [inline]
       __do_sys_fallocate fs/open.c:367 [inline]
       __se_sys_fallocate fs/open.c:365 [inline]
       __x64_sys_fallocate+0xbc/0x110 fs/open.c:365
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ni->ni_lock/5 --> &mm->mmap_lock --> mapping.invalidate_lock#12

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(mapping.invalidate_lock#12);
                               lock(&mm->mmap_lock);
                               lock(mapping.invalidate_lock#12);
  lock(&ni->ni_lock/5);

 *** DEADLOCK ***

3 locks held by syz.4.162/7104:
 #0: ffff88804aa84420 (sb_writers#25){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline]
 #0: ffff88804aa84420 (sb_writers#25){.+.+}-{0:0}, at: vfs_fallocate+0x59d/0x7a0 fs/open.c:337
 #1: ffff8880602145b0 (&sb->s_type->i_mutex_key#31){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
 #1: ffff8880602145b0 (&sb->s_type->i_mutex_key#31){+.+.}-{4:4}, at: ntfs_fallocate+0x2dd/0x1270 fs/ntfs3/file.c:582
 #2: ffff888060214750 (mapping.invalidate_lock#12){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:922 [inline]
 #2: ffff888060214750 (mapping.invalidate_lock#12){++++}-{4:4}, at: ntfs_fallocate+0x3c4/0x1270 fs/ntfs3/file.c:596

stack backtrace:
CPU: 0 UID: 0 PID: 7104 Comm: syz.4.162 Not tainted 6.14.0-rc7-syzkaller-00050-gfc444ada1310 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2076
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2208
 check_prev_add kernel/locking/lockdep.c:3163 [inline]
 check_prevs_add kernel/locking/lockdep.c:3282 [inline]
 validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
 ni_lock fs/ntfs3/ntfs_fs.h:1111 [inline]
 ntfs_fallocate+0x816/0x1270 fs/ntfs3/file.c:666
 vfs_fallocate+0x623/0x7a0 fs/open.c:338
 ksys_fallocate fs/open.c:362 [inline]
 __do_sys_fallocate fs/open.c:367 [inline]
 __se_sys_fallocate fs/open.c:365 [inline]
 __x64_sys_fallocate+0xbc/0x110 fs/open.c:365
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8bdf8d169
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:00007fe8bed6f038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fe8be1a5fa0 RCX: 00007fe8bdf8d169
RDX: 0000000000000400 RSI: 0000000000000008 RDI: 0000000000000004
RBP: 00007fe8be00e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000007000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe8be1a5fa0 R15: 00007ffdd1fd5488
 </TASK>
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 7104 Comm: syz.4.162 Not tainted 6.14.0-rc7-syzkaller-00050-gfc444ada1310 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 fail_dump lib/fault-inject.c:73 [inline]
 should_fail_ex+0x40a/0x550 lib/fault-inject.c:174
 _inline_copy_from_user include/linux/uaccess.h:163 [inline]
 _copy_from_user+0x2d/0xb0 lib/usercopy.c:18
 copy_from_user include/linux/uaccess.h:212 [inline]
 ioctl_preallocate fs/ioctl.c:274 [inline]
 file_ioctl fs/ioctl.c:330 [inline]
 do_vfs_ioctl+0x1b77/0x2770 fs/ioctl.c:885
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0x80/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8bdf8d169
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:00007fe8bed6f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe8be1a5fa0 RCX: 00007fe8bdf8d169
RDX: 0000400000000000 RSI: 0000000040305828 RDI: 0000000000000006
RBP: 00007fe8bed6f090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fe8be1a5fa0 R15: 00007ffdd1fd5488
 </TASK>