loop8: detected capacity change from 0 to 4096
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.8.131/6902 is trying to acquire lock:
ffff888063b44250 (&wnd->rw_lock){++++}-{4:4}, at: mark_as_free_ex+0x3e/0x390 fs/ntfs3/fsntfs.c:2464
but task is already holding lock:
ffff88805e28e580 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:483 [inline]
ffff88805e28e580 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_setattr+0x70e/0xbe0 fs/ntfs3/file.c:806
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&ni->file.run_lock#2){++++}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
down_read+0x97/0x1f0 kernel/locking/rwsem.c:1537
run_unpack_ex+0x7e5/0xba0 fs/ntfs3/run.c:1124
ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
ntfs_iget5+0x232b/0x37e0 fs/ntfs3/inode.c:541
dir_search_u+0x1df/0x2c0 fs/ntfs3/dir.c:264
ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85
__lookup_slow+0x29d/0x3d0 fs/namei.c:1816
lookup_slow+0x53/0x70 fs/namei.c:1833
walk_component+0x2d2/0x400 fs/namei.c:2151
lookup_last fs/namei.c:2652 [inline]
path_lookupat+0x163/0x430 fs/namei.c:2676
do_o_path+0x97/0x1f0 fs/namei.c:4105
path_openat+0x312b/0x3840 fs/namei.c:4127
do_filp_open+0x1fa/0x410 fs/namei.c:4161
do_sys_openat2+0x121/0x1c0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1463
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 (&wnd->rw_lock){++++}-{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_write_nested+0x3e/0x60 kernel/locking/rwsem.c:1706
mark_as_free_ex+0x3e/0x390 fs/ntfs3/fsntfs.c:2464
run_deallocate_ex+0x187/0x2f0 fs/ntfs3/attrib.c:122
attr_set_size+0xeb9/0x2c70 fs/ntfs3/attrib.c:753
ntfs_truncate fs/ntfs3/file.c:484 [inline]
ntfs_setattr+0x7d0/0xbe0 fs/ntfs3/file.c:806
notify_change+0xc18/0xf60 fs/attr.c:546
do_truncate+0x1a4/0x220 fs/open.c:68
vfs_truncate+0x493/0x520 fs/open.c:118
do_sys_truncate+0xdb/0x190 fs/open.c:141
__do_sys_truncate fs/open.c:153 [inline]
__se_sys_truncate fs/open.c:151 [inline]
__x64_sys_truncate+0x5b/0x70 fs/open.c:151
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:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ni->file.run_lock#2);
lock(&wnd->rw_lock);
lock(&ni->file.run_lock#2);
lock(&wnd->rw_lock);
*** DEADLOCK ***
4 locks held by syz.8.131/6902:
#0: ffff888063b46480 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499
#1: ffff88805e28e798 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:985 [inline]
#1: ffff88805e28e798 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: do_truncate+0x171/0x220 fs/open.c:63
#2: ffff88805e28e4e0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline]
#2: ffff88805e28e4e0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:481 [inline]
#2: ffff88805e28e4e0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_setattr+0x6fd/0xbe0 fs/ntfs3/file.c:806
#3: ffff88805e28e580 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:483 [inline]
#3: ffff88805e28e580 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_setattr+0x70e/0xbe0 fs/ntfs3/file.c:806
stack backtrace:
CPU: 0 UID: 0 PID: 6902 Comm: syz.8.131 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
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_write_nested+0x3e/0x60 kernel/locking/rwsem.c:1706
mark_as_free_ex+0x3e/0x390 fs/ntfs3/fsntfs.c:2464
run_deallocate_ex+0x187/0x2f0 fs/ntfs3/attrib.c:122
attr_set_size+0xeb9/0x2c70 fs/ntfs3/attrib.c:753
ntfs_truncate fs/ntfs3/file.c:484 [inline]
ntfs_setattr+0x7d0/0xbe0 fs/ntfs3/file.c:806
notify_change+0xc18/0xf60 fs/attr.c:546
do_truncate+0x1a4/0x220 fs/open.c:68
vfs_truncate+0x493/0x520 fs/open.c:118
do_sys_truncate+0xdb/0x190 fs/open.c:141
__do_sys_truncate fs/open.c:153 [inline]
__se_sys_truncate fs/open.c:151 [inline]
__x64_sys_truncate+0x5b/0x70 fs/open.c:151
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: 0033:0x7f0794aef749
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:00007f0792d4e038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f0794d45fa0 RCX: 00007f0794aef749
RDX: 0000000000000000 RSI: 00000000000002ab RDI: 0000200000000000
RBP: 00007f0794b73f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0794d46038 R14: 00007f0794d45fa0 R15: 00007ffcc8e7efd8
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 6902 Comm: syz.8.131 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:73 [inline]
should_fail_ex+0x46c/0x600 lib/fault-inject.c:174
prepare_alloc_pages+0x213/0x670 mm/page_alloc.c:4953
__alloc_frozen_pages_noprof+0x123/0x370 mm/page_alloc.c:5167
alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2416
alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline]
alloc_pages_noprof+0xcf/0x1e0 mm/mempolicy.c:2507
folio_alloc_noprof+0x22/0xc0 mm/mempolicy.c:2517
filemap_alloc_folio_noprof+0xdf/0x510 mm/filemap.c:1020
__filemap_get_folio+0x33d/0xa40 mm/filemap.c:2012
block_write_begin+0x62/0x120 fs/buffer.c:2251
ntfs_extend_initialized_size+0x35f/0x730 fs/ntfs3/file.c:193
ntfs_extend+0x4f2/0x970 fs/ntfs3/file.c:393
ntfs_file_write_iter+0x424/0x870 fs/ntfs3/file.c:1248
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5d5/0xb40 fs/read_write.c:686
ksys_pwrite64 fs/read_write.c:793 [inline]
__do_sys_pwrite64 fs/read_write.c:801 [inline]
__se_sys_pwrite64 fs/read_write.c:798 [inline]
__x64_sys_pwrite64+0x196/0x220 fs/read_write.c:798
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: 0033:0x7f0794aef749
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:00007f0792d4e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f0794d45fa0 RCX: 00007f0794aef749
RDX: 0000000000000001 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007f0792d4e090 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000004fed0 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f0794d46038 R14: 00007f0794d45fa0 R15: 00007ffcc8e7efd8
ntfs3(loop8): ino=0, "file1" failed to extend initialized size to 4fed0.