ntfs3(loop0): Mark volume as dirty due to NTF ntfs3(loop0): Mark volume as dirty due to NTFS errors ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc4-syzkaller-g3c795c3404e8 #0 Not tainted ------------------------------------------------------ syz.0.3671/15295 is trying to acquire lock: ffff0000de607730 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1119 but task is already holding lock: ffff0000d857a270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x60c/0x998 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}: down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0xbc/0x560 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x198/0x620 fs/ntfs3/attrib.c:159 attr_set_size+0x1064/0x2368 fs/ntfs3/attrib.c:574 ntfs_extend_mft+0x130/0x394 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x500/0xb1c fs/ntfs3/fsntfs.c:709 ntfs_create_inode+0x368/0x2750 fs/ntfs3/inode.c:1272 ntfs_create+0x54/0x6c fs/ntfs3/namei.c:110 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:771 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:790 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (&ni->file.run_lock#2){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x19f4/0x2a44 fs/ntfs3/inode.c:540 dir_search_u+0x250/0x2a4 fs/ntfs3/dir.c:264 ntfs_lookup+0x100/0x1f0 fs/ntfs3/namei.c:85 lookup_one_qstr_excl_raw+0x10c/0x25c fs/namei.c:1689 lookup_one_qstr_excl fs/namei.c:1711 [inline] do_unlinkat+0x1a0/0x4dc fs/namei.c:4647 __do_sys_unlinkat fs/namei.c:4700 [inline] __se_sys_unlinkat fs/namei.c:4693 [inline] __arm64_sys_unlinkat+0xdc/0xf8 fs/namei.c:4693 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:771 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:790 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 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.0.3671/15295: #0: ffff0000d857c428 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:557 #1: ffff0000de606a68 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline] #1: ffff0000de606a68 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: do_unlinkat+0x190/0x4dc fs/namei.c:4646 #2: ffff0000de6067d0 (&ni->ni_lock#3/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1105 [inline] #2: ffff0000de6067d0 (&ni->ni_lock#3/6){+.+.}-{4:4}, at: ntfs_lookup+0xf0/0x1f0 fs/ntfs3/namei.c:84 #3: ffff0000d857a270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x60c/0x998 fs/ntfs3/run.c:1100 stack backtrace: CPU: 1 UID: 0 PID: 15295 Comm: syz.0.3671 Not tainted 6.16.0-rc4-syzkaller-g3c795c3404e8 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2046 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x19f4/0x2a44 fs/ntfs3/inode.c:540 dir_search_u+0x250/0x2a4 fs/ntfs3/dir.c:264 ntfs_lookup+0x100/0x1f0 fs/ntfs3/namei.c:85 lookup_one_qstr_excl_raw+0x10c/0x25c fs/namei.c:1689 lookup_one_qstr_excl fs/namei.c:1711 [inline] do_unlinkat+0x1a0/0x4dc fs/namei.c:4647 __do_sys_unlinkat fs/namei.c:4700 [inline] __se_sys_unlinkat fs/namei.c:4693 [inline] __arm64_sys_unlinkat+0xdc/0xf8 fs/namei.c:4693 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:771 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:790 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600