INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 7462 Comm: syz.2.138 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 assign_lock_key+0x178/0x188 kernel/locking/lockdep.c:984
 register_lock_class+0xf0/0x348 kernel/locking/lockdep.c:1299
 __lock_acquire+0xbc/0x30a4 kernel/locking/lockdep.c:5112
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
 ntfs_set_size+0x130/0x200 fs/ntfs3/inode.c:860
 ntfs_extend+0x190/0x7fc fs/ntfs3/file.c:387
 ntfs_setattr+0x244/0x954 fs/ntfs3/file.c:808
 notify_change+0xa0c/0xcb8 fs/attr.c:546
 do_truncate+0x198/0x210 fs/open.c:68
 vfs_truncate+0x398/0x444 fs/open.c:118
 do_sys_truncate+0xe4/0x1a8 fs/open.c:141
 __do_sys_truncate fs/open.c:153 [inline]
 __se_sys_truncate fs/open.c:151 [inline]
 __arm64_sys_truncate+0x5c/0x74 fs/open.c:151
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
ntfs3(loop2): ino=19, "file1" attr_set_size
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(sem->magic != sem): count = 0x1, magic = 0x0, owner = 0xffff0000c7468000, curr 0xffff0000c7468000, list not empty
WARNING: CPU: 0 PID: 7462 at kernel/locking/rwsem.c:1375 __up_write kernel/locking/rwsem.c:1375 [inline]
WARNING: CPU: 0 PID: 7462 at kernel/locking/rwsem.c:1375 up_write+0x3a0/0x5b4 kernel/locking/rwsem.c:1643
Modules linked in:
CPU: 0 UID: 0 PID: 7462 Comm: syz.2.138 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __up_write kernel/locking/rwsem.c:1375 [inline]
pc : up_write+0x3a0/0x5b4 kernel/locking/rwsem.c:1643
lr : __up_write kernel/locking/rwsem.c:1375 [inline]
lr : up_write+0x3a0/0x5b4 kernel/locking/rwsem.c:1643
sp : ffff8000a5d97710
x29: ffff8000a5d97720 x28: ffff700014bb2efc x27: 1fffe000201436b3
x26: dfff800000000000 x25: 0000000000000001 x24: ffff0000c7468000
x23: ffff0000c7468000 x22: 0000000000000000 x21: ffff000100a1b490
x20: ffff000100a1b4a0 x19: ffff000100a1b438 x18: 1fffe000337d6e90
x17: ffff80008f59e000 x16: ffff800082dee3c0 x15: 0000000000000001
x14: 1fffe000337d9918 x13: 0000000000000000 x12: 0000000000000000
x11: ffff6000337d9919 x10: 0000000000000003 x9 : 5d41575d1b19ac00
x8 : 5d41575d1b19ac00 x7 : 0000000000000000 x6 : ffff8000804936c4
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000010
x2 : ffff8000a5d972c0 x1 : ffff80008b3fb340 x0 : 0000000000000001
Call trace:
 __up_write kernel/locking/rwsem.c:1375 [inline] (P)
 up_write+0x3a0/0x5b4 kernel/locking/rwsem.c:1643 (P)
 ntfs_set_size+0x164/0x200 fs/ntfs3/inode.c:865
 ntfs_extend+0x190/0x7fc fs/ntfs3/file.c:387
 ntfs_setattr+0x244/0x954 fs/ntfs3/file.c:808
 notify_change+0xa0c/0xcb8 fs/attr.c:546
 do_truncate+0x198/0x210 fs/open.c:68
 vfs_truncate+0x398/0x444 fs/open.c:118
 do_sys_truncate+0xe4/0x1a8 fs/open.c:141
 __do_sys_truncate fs/open.c:153 [inline]
 __se_sys_truncate fs/open.c:151 [inline]
 __arm64_sys_truncate+0x5c/0x74 fs/open.c:151
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 1635
hardirqs last  enabled at (1635): [<ffff8000806304c0>] seqcount_lockdep_reader_access+0x7c/0xf8 include/linux/seqlock.h:74
hardirqs last disabled at (1634): [<ffff800080630484>] seqcount_lockdep_reader_access+0x40/0xf8 include/linux/seqlock.h:71
softirqs last  enabled at (1594): [<ffff8000801f96d0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1592): [<ffff8000801f969c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---