option from the mount to silence this warning. ======================================================= ntfs3: loop0: Different NTFS sector size (4096) and media sector size (512). ntfs3: loop0: Mark volume as dirty due to NTFS errors ============================================ WARNING: possible recursive locking detected 6.7.0-rc8-syzkaller #0 Not tainted -------------------------------------------- syz-executor.0/5435 is trying to acquire lock: ffff888075701e80 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] ffff888075701e80 (&ni->ni_lock/4){+.+.}-{3:3}, at: mi_read+0x2e1/0x5a0 fs/ntfs3/record.c:148 but task is already holding lock: ffff888075706840 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] ffff888075706840 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_lookup+0xf9/0x1f0 fs/ntfs3/namei.c:84 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&ni->ni_lock/4); lock(&ni->ni_lock/4); *** DEADLOCK *** May be due to missing lock nesting notation 2 locks held by syz-executor.0/5435: #0: ffff888075706ae0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline] #0: ffff888075706ae0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1710 #1: ffff888075706840 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] #1: ffff888075706840 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_lookup+0xf9/0x1f0 fs/ntfs3/namei.c:84 stack backtrace: CPU: 0 PID: 5435 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_deadlock kernel/locking/lockdep.c:3062 [inline] validate_chain kernel/locking/lockdep.c:3856 [inline] __lock_acquire+0x6aa3/0x7fb0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x136/0xd60 kernel/locking/mutex.c:747 ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] mi_read+0x2e1/0x5a0 fs/ntfs3/record.c:148 ntfs_read_mft fs/ntfs3/inode.c:70 [inline] ntfs_iget5+0x4d1/0x3b70 fs/ntfs3/inode.c:534 dir_search_u+0x2fa/0x3a0 fs/ntfs3/dir.c:264 ntfs_lookup+0x106/0x1f0 fs/ntfs3/namei.c:85 __lookup_slow+0x282/0x3e0 fs/namei.c:1694 lookup_slow+0x53/0x70 fs/namei.c:1711 walk_component+0x2d0/0x400 fs/namei.c:2002 lookup_last fs/namei.c:2459 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2483 filename_lookup+0x255/0x610 fs/namei.c:2512 user_path_at_empty+0x42/0x60 fs/namei.c:2911 user_path_at include/linux/namei.h:57 [inline] path_getxattr+0xde/0x410 fs/xattr.c:785 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0xe0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fdcd547cce9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdcd61540c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bf RAX: ffffffffffffffda RBX: 00007fdcd559bf80 RCX: 00007fdcd547cce9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002001f740 RBP: 00007fdcd54c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fdcd559bf80 R15: 00007fffc68d8bb8