ntfs3(loop0): Mark volume as dirty due to NTFS errors ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.0.3875/15569 is trying to acquire lock: ffff88804c772278 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff88805210bc30 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x143/0x240 fs/ntfs3/inode.c:722 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->file.run_lock#2){++++}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 run_unpack_ex+0x7e5/0xba0 fs/ntfs3/run.c:1135 ntfs_read_mft fs/ntfs3/inode.c:400 [inline] ntfs_iget5+0x238b/0x3860 fs/ntfs3/inode.c:541 dir_search_u+0x1df/0x2c0 fs/ntfs3/dir.c:265 ntfs_lookup+0x100/0x1d0 fs/ntfs3/namei.c:85 __lookup_slow+0x297/0x3d0 fs/namei.c:1916 lookup_slow+0x53/0x70 fs/namei.c:1933 walk_component fs/namei.c:2279 [inline] lookup_last fs/namei.c:2780 [inline] path_lookupat+0x3f5/0x8c0 fs/namei.c:2804 filename_lookup+0x212/0x570 fs/namei.c:2833 filename_getxattr+0xa5/0x210 fs/xattr.c:808 path_getxattrat fs/xattr.c:850 [inline] __do_sys_lgetxattr fs/xattr.c:888 [inline] __se_sys_lgetxattr fs/xattr.c:885 [inline] __x64_sys_lgetxattr+0x1cc/0x230 fs/xattr.c:885 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 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 kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x107/0x340 kernel/locking/lockdep.c:5868 down_write_nested+0x9d/0x200 kernel/locking/rwsem.c:1706 ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c2/0x750 fs/ntfs3/attrib.c:159 attr_set_size+0x14ef/0x2cf0 fs/ntfs3/attrib.c:582 ntfs_set_size+0x167/0x240 fs/ntfs3/inode.c:724 ntfs_extend+0x1c1/0xae0 fs/ntfs3/file.c:337 ntfs_file_write_iter+0x462/0xa10 fs/ntfs3/file.c:1254 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x5c9/0xb30 fs/read_write.c:688 ksys_write+0x145/0x250 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 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 *** 5 locks held by syz.0.3875/15569: #0: ffff88802e4749b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 fs/file.c:1255 #1: ffff88807b38e420 (sb_writers#32){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2706 [inline] #1: ffff88807b38e420 (sb_writers#32){.+.+}-{0:0}, at: vfs_write+0x211/0xb30 fs/read_write.c:684 #2: ffff88805210be20 (&sb->s_type->i_mutex_key#45){++++}-{4:4}, at: inode_trylock include/linux/fs.h:1058 [inline] #2: ffff88805210be20 (&sb->s_type->i_mutex_key#45){++++}-{4:4}, at: ntfs_file_write_iter+0xbd/0xa10 fs/ntfs3/file.c:1222 #3: ffff88805210bb80 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1152 [inline] #3: ffff88805210bb80 (&ni->ni_lock/5){+.+.}-{4:4}, at: ntfs_set_size+0x134/0x240 fs/ntfs3/inode.c:721 #4: ffff88805210bc30 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x143/0x240 fs/ntfs3/inode.c:722 stack backtrace: CPU: 0 UID: 0 PID: 15569 Comm: syz.0.3875 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 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 kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x107/0x340 kernel/locking/lockdep.c:5868 down_write_nested+0x9d/0x200 kernel/locking/rwsem.c:1706 ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c2/0x750 fs/ntfs3/attrib.c:159 attr_set_size+0x14ef/0x2cf0 fs/ntfs3/attrib.c:582 ntfs_set_size+0x167/0x240 fs/ntfs3/inode.c:724 ntfs_extend+0x1c1/0xae0 fs/ntfs3/file.c:337 ntfs_file_write_iter+0x462/0xa10 fs/ntfs3/file.c:1254 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x5c9/0xb30 fs/read_write.c:688 ksys_write+0x145/0x250 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe88e18f749 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:00007fe88f0ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe88e3e5fa0 RCX: 00007fe88e18f749 RDX: 000000000000002f RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fe88e213f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe88e3e6038 R14: 00007fe88e3e5fa0 R15: 00007ffe11bfe9a8