ntfs3: loop2: Mark volume as dirty due to NTFS errors ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.3439/14946 is trying to acquire lock: ffff88814333e270 (&wnd->rw_lock){++++}-{3:3}, at: mark_as_free_ex+0x3e/0x380 fs/ntfs3/fsntfs.c:2491 but task is already holding lock: ffff8880590768f0 (&ni->file.run_lock#2){++++}-{3:3}, at: ntfs_truncate fs/ntfs3/file.c:396 [inline] ffff8880590768f0 (&ni->file.run_lock#2){++++}-{3:3}, at: ntfs3_setattr+0x512/0xb80 fs/ntfs3/file.c:706 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->file.run_lock#2){++++}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 run_unpack_ex+0x7fb/0xb80 fs/ntfs3/run.c:1126 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x2475/0x38a0 fs/ntfs3/inode.c:535 dir_search_u+0x1fe/0x2e0 fs/ntfs3/dir.c:264 ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85 __lookup_slow+0x2a1/0x400 fs/namei.c:1702 lookup_slow+0x53/0x70 fs/namei.c:1719 walk_component+0x2be/0x3f0 fs/namei.c:2010 lookup_last fs/namei.c:2467 [inline] path_lookupat+0x169/0x440 fs/namei.c:2491 filename_lookup+0x228/0x560 fs/namei.c:2520 user_path_at_empty+0x42/0x60 fs/namei.c:2917 user_path_at include/linux/namei.h:57 [inline] do_sys_truncate+0xba/0x1c0 fs/open.c:133 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&wnd->rw_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write_nested+0x9e/0x200 kernel/locking/rwsem.c:1689 mark_as_free_ex+0x3e/0x380 fs/ntfs3/fsntfs.c:2491 run_deallocate_ex+0x19b/0x310 fs/ntfs3/attrib.c:122 attr_set_size+0xee7/0x2ce0 fs/ntfs3/attrib.c:754 ntfs_truncate fs/ntfs3/file.c:397 [inline] ntfs3_setattr+0x5d4/0xb80 fs/ntfs3/file.c:706 notify_change+0xb0d/0xe10 fs/attr.c:499 do_truncate+0x1b0/0x240 fs/open.c:66 handle_truncate fs/namei.c:3299 [inline] do_open fs/namei.c:3644 [inline] path_openat+0x2a32/0x3230 fs/namei.c:3797 do_filp_open+0x1f5/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 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.2.3439/14946: #0: ffff88814e0a6418 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff888059076af0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff888059076af0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x19c/0x240 fs/open.c:64 #2: ffff888059076840 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1120 [inline] #2: ffff888059076840 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_truncate fs/ntfs3/file.c:394 [inline] #2: ffff888059076840 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs3_setattr+0x4fe/0xb80 fs/ntfs3/file.c:706 #3: ffff8880590768f0 (&ni->file.run_lock#2){++++}-{3:3}, at: ntfs_truncate fs/ntfs3/file.c:396 [inline] #3: ffff8880590768f0 (&ni->file.run_lock#2){++++}-{3:3}, at: ntfs3_setattr+0x512/0xb80 fs/ntfs3/file.c:706 stack backtrace: CPU: 0 PID: 14946 Comm: syz.2.3439 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 check_noncircular+0x2fc/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write_nested+0x9e/0x200 kernel/locking/rwsem.c:1689 mark_as_free_ex+0x3e/0x380 fs/ntfs3/fsntfs.c:2491 run_deallocate_ex+0x19b/0x310 fs/ntfs3/attrib.c:122 attr_set_size+0xee7/0x2ce0 fs/ntfs3/attrib.c:754 ntfs_truncate fs/ntfs3/file.c:397 [inline] ntfs3_setattr+0x5d4/0xb80 fs/ntfs3/file.c:706 notify_change+0xb0d/0xe10 fs/attr.c:499 do_truncate+0x1b0/0x240 fs/open.c:66 handle_truncate fs/namei.c:3299 [inline] do_open fs/namei.c:3644 [inline] path_openat+0x2a32/0x3230 fs/namei.c:3797 do_filp_open+0x1f5/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5ec639aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5ec7290028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f5ec6615fa0 RCX: 00007f5ec639aeb9 RDX: 0000000000183341 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007f5ec6408c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5ec6616038 R14: 00007f5ec6615fa0 R15: 00007ffee2d580c8