====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc5-next-20241104-syzkaller #0 Not tainted ------------------------------------------------------ syz.2.2471/12547 is trying to acquire lock: ffff88802c7f4270 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0x100/0x690 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff88806014e128 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_extend_mft+0x160/0x4b0 fs/ntfs3/fsntfs.c:511 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+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524 run_unpack_ex+0x55e/0x9e0 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x1f9a/0x37b0 fs/ntfs3/inode.c:537 dir_search_u+0x2fe/0x3a0 fs/ntfs3/dir.c:264 ntfs_lookup+0x106/0x1f0 fs/ntfs3/namei.c:85 __lookup_slow+0x28c/0x3f0 fs/namei.c:1773 lookup_slow+0x53/0x70 fs/namei.c:1790 walk_component+0x2e1/0x410 fs/namei.c:2094 lookup_last fs/namei.c:2597 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2621 filename_lookup+0x256/0x610 fs/namei.c:2650 user_path_at+0x3a/0x60 fs/namei.c:3057 do_sys_truncate+0xa4/0x190 fs/open.c:132 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&wnd->rw_lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write_nested+0xa2/0x220 kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0x100/0x690 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1d6/0x990 fs/ntfs3/attrib.c:159 attr_set_size+0x2053/0x4300 fs/ntfs3/attrib.c:574 ntfs_extend_mft+0x188/0x4b0 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x77c/0x10c0 fs/ntfs3/fsntfs.c:709 ntfs_create_inode+0x581/0x3760 fs/ntfs3/inode.c:1305 ntfs_create+0x3d/0x50 fs/ntfs3/namei.c:110 lookup_open fs/namei.c:3636 [inline] open_last_lookups fs/namei.c:3735 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3971 do_filp_open+0x235/0x490 fs/namei.c:4001 do_sys_openat2+0x13e/0x1d0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_creat fs/open.c:1512 [inline] __se_sys_creat fs/open.c:1506 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1506 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 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.2.2471/12547: #0: ffff88807fabc420 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff8880786ea0f8 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: inode_lock include/linux/fs.h:817 [inline] #1: ffff8880786ea0f8 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: open_last_lookups fs/namei.c:3732 [inline] #1: ffff8880786ea0f8 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: path_openat+0x89a/0x3590 fs/namei.c:3971 #2: ffff8880786e9e60 (&ni->ni_lock#2/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1115 [inline] #2: ffff8880786e9e60 (&ni->ni_lock#2/6){+.+.}-{4:4}, at: ntfs_create_inode+0x215/0x3760 fs/ntfs3/inode.c:1219 #3: ffff88802c7f4128 (&wnd->rw_lock/1){+.+.}-{4:4}, at: ntfs_look_free_mft+0x1e5/0x10c0 fs/ntfs3/fsntfs.c:571 #4: ffff88806014e128 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_extend_mft+0x160/0x4b0 fs/ntfs3/fsntfs.c:511 stack backtrace: CPU: 0 UID: 0 PID: 12547 Comm: syz.2.2471 Not tainted 6.12.0-rc5-next-20241104-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write_nested+0xa2/0x220 kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0x100/0x690 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1d6/0x990 fs/ntfs3/attrib.c:159 attr_set_size+0x2053/0x4300 fs/ntfs3/attrib.c:574 ntfs_extend_mft+0x188/0x4b0 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x77c/0x10c0 fs/ntfs3/fsntfs.c:709 ntfs_create_inode+0x581/0x3760 fs/ntfs3/inode.c:1305 ntfs_create+0x3d/0x50 fs/ntfs3/namei.c:110 lookup_open fs/namei.c:3636 [inline] open_last_lookups fs/namei.c:3735 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3971 do_filp_open+0x235/0x490 fs/namei.c:4001 do_sys_openat2+0x13e/0x1d0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_creat fs/open.c:1512 [inline] __se_sys_creat fs/open.c:1506 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1506 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f541777e719 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:00007f5418617038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f5417935f80 RCX: 00007f541777e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 00007f54177f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5417935f80 R15: 00007ffc74931878 ntfs3(loop2): ino=0, attr_set_size