ntfs3(loop1): Mark volume as dirty due to NTFS errors ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.7803/6333 is trying to acquire lock: ffff8880768dc270 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff88806afa67a0 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:860 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+0x46/0x2e0 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+0x297/0x3d0 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 filename_lookup+0x212/0x570 fs/namei.c:2705 user_path_at+0x3a/0x60 fs/namei.c:3215 do_sys_truncate+0xa3/0x190 fs/open.c:139 __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 -> #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+0x9d/0x200 kernel/locking/rwsem.c:1706 ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c1/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a4/0x2c70 fs/ntfs3/attrib.c:574 ntfs_set_size+0x164/0x200 fs/ntfs3/inode.c:862 ntfs_extend+0x1d9/0x970 fs/ntfs3/file.c:387 ntfs_file_write_iter+0x421/0x870 fs/ntfs3/file.c:1248 iter_file_splice_write+0x975/0x10e0 fs/splice.c:738 do_splice_from fs/splice.c:938 [inline] direct_splice_actor+0x101/0x160 fs/splice.c:1161 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1105 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x181/0x270 fs/splice.c:1230 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417 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.1.7803/6333: #0: ffff8880768da420 (sb_writers#17){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 fs/splice.c:1160 #1: ffff88806afa6988 (&sb->s_type->i_mutex_key#23){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:1010 [inline] #1: ffff88806afa6988 (&sb->s_type->i_mutex_key#23){+.+.}-{4:4}, at: ntfs_file_write_iter+0x7a/0x870 fs/ntfs3/file.c:1216 #2: ffff88806afa66f0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] #2: ffff88806afa66f0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_set_size+0x131/0x200 fs/ntfs3/inode.c:859 #3: ffff88806afa67a0 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:860 stack backtrace: CPU: 0 UID: 0 PID: 6333 Comm: syz.1.7803 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 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+0x9d/0x200 kernel/locking/rwsem.c:1706 ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c1/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a4/0x2c70 fs/ntfs3/attrib.c:574 ntfs_set_size+0x164/0x200 fs/ntfs3/inode.c:862 ntfs_extend+0x1d9/0x970 fs/ntfs3/file.c:387 ntfs_file_write_iter+0x421/0x870 fs/ntfs3/file.c:1248 iter_file_splice_write+0x975/0x10e0 fs/splice.c:738 do_splice_from fs/splice.c:938 [inline] direct_splice_actor+0x101/0x160 fs/splice.c:1161 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1105 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x181/0x270 fs/splice.c:1230 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417 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: 0033:0x7f2a26b8eec9 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:00007f2a27ae7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f2a26de5fa0 RCX: 00007f2a26b8eec9 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000005 RBP: 00007f2a26c11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2a26de6038 R14: 00007f2a26de5fa0 R15: 00007fff861d3618