ntfs3: loop5: Failed to load $Extend (-22). ntfs3: loop5: Failed to initialize $Extend. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.5.154/6579 is trying to acquire lock: ffff888077264b70 (&ni->file.run_lock#2){++++}-{3:3}, at: run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1122 but task is already holding lock: ffff888030224270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x702/0xba0 fs/ntfs3/run.c:1103 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&wnd->rw_lock){++++}-{3:3}: down_write_nested+0x9e/0x1f0 kernel/locking/rwsem.c:1689 ntfs_look_for_free_space+0xd4/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c2/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a0/0x2c60 fs/ntfs3/attrib.c:575 ntfs_extend_mft+0x163/0x450 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x5f6/0xd40 fs/ntfs3/fsntfs.c:709 ni_create_attr_list+0x904/0x1370 fs/ntfs3/frecord.c:878 ni_ins_attr_ext+0x315/0x9c0 fs/ntfs3/frecord.c:976 ni_insert_attr fs/ntfs3/frecord.c:1143 [inline] ni_insert_resident fs/ntfs3/frecord.c:1527 [inline] ni_add_name+0x6e0/0xc90 fs/ntfs3/frecord.c:3042 ni_rename+0x4b/0x100 fs/ntfs3/frecord.c:3081 ntfs_rename+0x6dc/0xb30 fs/ntfs3/namei.c:333 vfs_rename+0xb96/0xec0 fs/namei.c:4880 do_renameat2+0x8a1/0xc70 fs/namei.c:5033 __do_sys_rename fs/namei.c:5079 [inline] __se_sys_rename fs/namei.c:5077 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:5077 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ni->file.run_lock#2){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1122 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x22e3/0x3760 fs/ntfs3/inode.c:534 dir_search_u+0x1e0/0x2b0 fs/ntfs3/dir.c:264 ntfs_atomic_open+0x23b/0x520 fs/ntfs3/namei.c:408 atomic_open fs/namei.c:3359 [inline] lookup_open fs/namei.c:3467 [inline] open_last_lookups fs/namei.c:3564 [inline] path_openat+0xf27/0x3190 fs/namei.c:3794 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824 do_sys_openat2+0x12c/0x1c0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 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 *** 4 locks held by syz.5.154/6579: #0: ffff888030222418 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff88805df23750 (&type->i_mutex_dir_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88805df23750 (&type->i_mutex_dir_key#15){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3561 [inline] #1: ffff88805df23750 (&type->i_mutex_dir_key#15){+.+.}-{3:3}, at: path_openat+0x7c6/0x3190 fs/namei.c:3794 #2: ffff88805df234a0 (&ni->ni_lock#2/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1124 [inline] #2: ffff88805df234a0 (&ni->ni_lock#2/6){+.+.}-{3:3}, at: ntfs_atomic_open+0x1ec/0x520 fs/ntfs3/namei.c:400 #3: ffff888030224270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x702/0xba0 fs/ntfs3/run.c:1103 stack backtrace: CPU: 0 PID: 6579 Comm: syz.5.154 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1122 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x22e3/0x3760 fs/ntfs3/inode.c:534 dir_search_u+0x1e0/0x2b0 fs/ntfs3/dir.c:264 ntfs_atomic_open+0x23b/0x520 fs/ntfs3/namei.c:408 atomic_open fs/namei.c:3359 [inline] lookup_open fs/namei.c:3467 [inline] open_last_lookups fs/namei.c:3564 [inline] path_openat+0xf27/0x3190 fs/namei.c:3794 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824 do_sys_openat2+0x12c/0x1c0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff64298f749 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:00007ff640bf6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ff642be6090 RCX: 00007ff64298f749 RDX: 0000000000101042 RSI: 0000200000000040 RDI: ffffffffffffff9c RBP: 00007ff642a13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff642be6128 R14: 00007ff642be6090 R15: 00007ffe1e10f2d8