ntfs3: loop4: Mark volume as dirty due to NTFS errors ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.983/10067 is trying to acquire lock: ffff88801baf8270 (&wnd->rw_lock){++++}-{3:3}, at: ntfs_look_for_free_space+0xda/0x650 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff888058cfa690 (&ni->file.run_lock#2){++++}-{3:3}, at: ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:849 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 ntfs_dir_emit fs/ntfs3/dir.c:338 [inline] ntfs_read_hdr+0x7d4/0xc30 fs/ntfs3/dir.c:386 ntfs_readdir+0xacb/0xeb0 fs/ntfs3/dir.c:497 iterate_dir+0x1c2/0x580 fs/readdir.c:106 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents+0xf6/0x260 fs/readdir.c:307 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 ntfs_look_for_free_space+0xda/0x650 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1be/0x6b0 fs/ntfs3/attrib.c:159 attr_set_size+0x14cb/0x2ce0 fs/ntfs3/attrib.c:575 ntfs_set_size+0x164/0x200 fs/ntfs3/inode.c:851 ntfs_extend+0x157/0x4d0 fs/ntfs3/file.c:335 ntfs_file_write_iter+0x3a7/0x700 fs/ntfs3/file.c:1118 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x738/0xc30 fs/read_write.c:860 iter_file_splice_write+0x6a3/0xcb0 fs/splice.c:736 do_splice_from fs/splice.c:933 [inline] direct_splice_actor+0xe8/0x130 fs/splice.c:1142 splice_direct_to_actor+0x304/0x8c0 fs/splice.c:1088 do_splice_direct+0x1d5/0x2f0 fs/splice.c:1194 do_sendfile+0x5f2/0xef0 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64+0x145/0x1a0 fs/read_write.c:1308 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.4.983/10067: #0: ffff88801bafc418 (sb_writers#31){.+.+}-{0:0}, at: do_sendfile+0x5cf/0xef0 fs/read_write.c:1253 #1: ffff888058cfa890 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:824 [inline] #1: ffff888058cfa890 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: ntfs_file_write_iter+0x23e/0x700 fs/ntfs3/file.c:1096 #2: ffff888058cfa5e0 (&ni->ni_lock#2/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1120 [inline] #2: ffff888058cfa5e0 (&ni->ni_lock#2/5){+.+.}-{3:3}, at: ntfs_set_size+0x131/0x200 fs/ntfs3/inode.c:848 #3: ffff888058cfa690 (&ni->file.run_lock#2){++++}-{3:3}, at: ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:849 stack backtrace: CPU: 1 PID: 10067 Comm: syz.4.983 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 ntfs_look_for_free_space+0xda/0x650 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1be/0x6b0 fs/ntfs3/attrib.c:159 attr_set_size+0x14cb/0x2ce0 fs/ntfs3/attrib.c:575 ntfs_set_size+0x164/0x200 fs/ntfs3/inode.c:851 ntfs_extend+0x157/0x4d0 fs/ntfs3/file.c:335 ntfs_file_write_iter+0x3a7/0x700 fs/ntfs3/file.c:1118 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x738/0xc30 fs/read_write.c:860 iter_file_splice_write+0x6a3/0xcb0 fs/splice.c:736 do_splice_from fs/splice.c:933 [inline] direct_splice_actor+0xe8/0x130 fs/splice.c:1142 splice_direct_to_actor+0x304/0x8c0 fs/splice.c:1088 do_splice_direct+0x1d5/0x2f0 fs/splice.c:1194 do_sendfile+0x5f2/0xef0 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64+0x145/0x1a0 fs/read_write.c:1308 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: 0033:0x7fcf29f9acb9 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:00007fcf2adab028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fcf2a215fa0 RCX: 00007fcf29f9acb9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007fcf2a008bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcf2a216038 R14: 00007fcf2a215fa0 R15: 00007ffe03b31ac8