loop6: detected capacity change from 0 to 4096 ntfs3(loop6): Different NTFS sector size (4096) and media sector size (512). ntfs3(loop6): Failed to initialize $Extend/$Reparse. ntfs3(loop6): Mark volume as dirty due to NTFS errors ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 Not tainted ------------------------------------------------------ syz.6.10024/29518 is trying to acquire lock: ffff88804bbf97b8 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x7e5/0xba0 fs/ntfs3/run.c:1119 but task is already holding lock: ffff88807e9dc270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x701/0xba0 fs/ntfs3/run.c:1100 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&wnd->rw_lock){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_write_nested+0x9d/0x200 kernel/locking/rwsem.c:1693 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_extend_mft+0x162/0x450 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x5f8/0xd50 fs/ntfs3/fsntfs.c:709 ni_create_attr_list+0x8ff/0x13d0 fs/ntfs3/frecord.c:826 ni_ins_attr_ext+0x43e/0xb50 fs/ntfs3/frecord.c:924 ni_insert_attr fs/ntfs3/frecord.c:1091 [inline] ni_insert_resident fs/ntfs3/frecord.c:1475 [inline] ni_add_name+0x6df/0xc90 fs/ntfs3/frecord.c:2987 ntfs_link_inode+0x132/0x180 fs/ntfs3/inode.c:1698 ntfs_link+0x118/0x280 fs/ntfs3/namei.c:146 vfs_link+0x4ed/0x6e0 fs/namei.c:4847 do_linkat+0x272/0x560 fs/namei.c:4917 __do_sys_link fs/namei.c:4951 [inline] __se_sys_link fs/namei.c:4949 [inline] __x64_sys_link+0x82/0x90 fs/namei.c:4949 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ni->file.run_lock#2){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 run_unpack_ex+0x7e5/0xba0 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x232b/0x37c0 fs/ntfs3/inode.c:540 dir_search_u+0x1df/0x2c0 fs/ntfs3/dir.c:264 ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85 lookup_open fs/namei.c:3679 [inline] open_last_lookups fs/namei.c:3800 [inline] path_openat+0x1101/0x3830 fs/namei.c:4036 do_filp_open+0x1fa/0x410 fs/namei.c:4066 do_sys_openat2+0x121/0x1c0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 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(&wnd->rw_lock); lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); rlock(&ni->file.run_lock#2); *** DEADLOCK *** 3 locks held by syz.6.10024/29518: #0: ffff8880558b4d08 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:877 [inline] #0: ffff8880558b4d08 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: open_last_lookups fs/namei.c:3799 [inline] #0: ffff8880558b4d08 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: path_openat+0x8cb/0x3830 fs/namei.c:4036 #1: ffff8880558b4a70 (&ni->ni_lock/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1110 [inline] #1: ffff8880558b4a70 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_lookup+0xee/0x1f0 fs/ntfs3/namei.c:84 #2: ffff88807e9dc270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x701/0xba0 fs/ntfs3/run.c:1100 stack backtrace: CPU: 0 UID: 0 PID: 29518 Comm: syz.6.10024 Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2079 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 run_unpack_ex+0x7e5/0xba0 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x232b/0x37c0 fs/ntfs3/inode.c:540 dir_search_u+0x1df/0x2c0 fs/ntfs3/dir.c:264 ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85 lookup_open fs/namei.c:3679 [inline] open_last_lookups fs/namei.c:3800 [inline] path_openat+0x1101/0x3830 fs/namei.c:4036 do_filp_open+0x1fa/0x410 fs/namei.c:4066 do_sys_openat2+0x121/0x1c0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f45fc98e969 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:00007f45fd826038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f45fcbb5fa0 RCX: 00007f45fc98e969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000000 RBP: 00007f45fca10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f45fcbb5fa0 R15: 00007ffca7aa7888