============================================ WARNING: possible recursive locking detected 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0 Not tainted -------------------------------------------- syz-executor138/5065 is trying to acquire lock: ffff888074349920 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] ffff888074349920 (&ni->ni_lock/4){+.+.}-{3:3}, at: mi_read+0x462/0x650 fs/ntfs3/record.c:148 but task is already holding lock: ffff8880742a8860 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] ffff8880742a8860 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_lookup+0x1b8/0x2a0 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-executor138/5065: #0: ffff8880742a8b00 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline] #0: ffff8880742a8b00 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow fs/namei.c:1710 [inline] #0: ffff8880742a8b00 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: walk_component+0x33b/0x5a0 fs/namei.c:2002 #1: ffff8880742a8860 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] #1: ffff8880742a8860 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_lookup+0x1b8/0x2a0 fs/ntfs3/namei.c:84 stack backtrace: CPU: 1 PID: 5065 Comm: syz-executor138 Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_deadlock kernel/locking/lockdep.c:3062 [inline] validate_chain kernel/locking/lockdep.c:3856 [inline] __lock_acquire+0x20f8/0x3b20 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747 ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] mi_read+0x462/0x650 fs/ntfs3/record.c:148 ntfs_read_mft fs/ntfs3/inode.c:70 [inline] ntfs_iget5+0x4be/0x3810 fs/ntfs3/inode.c:534 dir_search_u+0x162/0x3d0 fs/ntfs3/dir.c:264 ntfs_lookup+0x1c5/0x2a0 fs/ntfs3/namei.c:85 __lookup_slow+0x24d/0x450 fs/namei.c:1694 lookup_slow fs/namei.c:1711 [inline] walk_component+0x349/0x5a0 fs/namei.c:2002 lookup_last fs/namei.c:2459 [inline] path_lookupat+0x17f/0x770 fs/namei.c:2483 filename_lookup+0x1e7/0x5b0 fs/namei.c:2512 user_path_at_empty+0x42/0x60 fs/namei.c:2911 user_path_at include/linux/namei.h:57 [inline] path_setxattr+0xa5/0x1d0 fs/xattr.c:667 __do_sys_setxattr fs/xattr.c:688 [inline] __se_sys_setxattr fs/xattr.c:684 [inline] __x64_sys_setxattr+0xc4/0x160 fs/xattr.c:684 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fdc157daa59 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffec09368f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fdc157daa59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007fdc1586c5f0 R08: 0000000000000000 R09: 00005555575114c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec0936920 R13: 00007ffec0936b48 R14: 431bde82d7b634db R15: 00007fdc1582303b