============================================ WARNING: possible recursive locking detected syzkaller #0 Not tainted -------------------------------------------- syz.0.120/4789 is trying to acquire lock: ffff888067b125e0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ffff888067b125e0 (&ni->ni_lock/5){+.+.}-{3:3}, at: mi_read+0x2cd/0x590 fs/ntfs3/record.c:148 but task is already holding lock: ffff88805febd980 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ffff88805febd980 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_rename+0x70f/0xc50 fs/ntfs3/namei.c:315 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&ni->ni_lock/5); lock(&ni->ni_lock/5); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by syz.0.120/4789: #0: ffff88805f72e460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff88805fefbea0 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #1: ffff88805fefbea0 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: do_renameat2+0x43d/0xf60 fs/namei.c:4932 #2: ffff88805febdc20 (&sb->s_type->i_mutex_key#29/4){+.+.}-{3:3}, at: vfs_rename+0x7e3/0x1100 fs/namei.c:4811 #3: ffff88805fefbc00 (&ni->ni_lock/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1105 [inline] #3: ffff88805fefbc00 (&ni->ni_lock/6){+.+.}-{3:3}, at: ntfs_rename+0x6f9/0xc50 fs/ntfs3/namei.c:314 #4: ffff88805febd980 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #4: ffff88805febd980 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_rename+0x70f/0xc50 fs/ntfs3/namei.c:315 #5: ffff88805f72c120 (&wnd->rw_lock/1){+.+.}-{3:3}, at: ntfs_look_free_mft+0x16d/0xd60 fs/ntfs3/fsntfs.c:542 stack backtrace: CPU: 0 PID: 4789 Comm: syz.0.120 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 __lock_acquire+0x1236/0x7d10 kernel/locking/lockdep.c:-1 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1e3/0x2400 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] mi_read+0x2cd/0x590 fs/ntfs3/record.c:148 mi_format_new+0x191/0x5c0 fs/ntfs3/record.c:374 ni_add_subrecord+0xcd/0x460 fs/ntfs3/frecord.c:372 ntfs_look_free_mft+0x4db/0xd60 fs/ntfs3/fsntfs.c:686 ni_create_attr_list+0x8f5/0x12a0 fs/ntfs3/frecord.c:852 ni_ins_attr_ext+0x381/0xa00 fs/ntfs3/frecord.c:953 ni_insert_attr fs/ntfs3/frecord.c:1120 [inline] ni_insert_resident fs/ntfs3/frecord.c:1504 [inline] ni_add_name+0x2e7/0x7f0 fs/ntfs3/frecord.c:3010 ni_rename+0x4b/0x130 fs/ntfs3/frecord.c:3050 ntfs_rename+0x737/0xc50 fs/ntfs3/namei.c:318 vfs_rename+0xbe1/0x1100 fs/namei.c:4840 do_renameat2+0x8b7/0xf60 fs/namei.c:4993 __do_sys_rename fs/namei.c:5039 [inline] __se_sys_rename fs/namei.c:5037 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5037 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f89ad2bc819 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:00007f89ab516028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f89ad535fa0 RCX: 00007f89ad2bc819 RDX: 0000000000000000 RSI: 0000200000000180 RDI: 00002000000002c0 RBP: 00007f89ab516090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f89ad536038 R14: 00007f89ad535fa0 R15: 00007fff266ae9c8