ntfs3(loop9): failed to convert "0080" to cp852 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.9.2159/13618 is trying to acquire lock: ffff0000dd6c3bf0 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1124 but task is already holding lock: ffff00010b59e270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x60c/0x998 fs/ntfs3/run.c:1105 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:1706 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 ni_create_attr_list+0x804/0x1184 fs/ntfs3/frecord.c:826 ni_ins_attr_ext+0x3d0/0x9c8 fs/ntfs3/frecord.c:924 ni_insert_attr fs/ntfs3/frecord.c:1091 [inline] ni_insert_resident fs/ntfs3/frecord.c:1475 [inline] ni_add_name+0x5a0/0xae4 fs/ntfs3/frecord.c:2987 ntfs_link_inode+0x174/0x184 fs/ntfs3/inode.c:1734 ntfs_link+0x114/0x238 fs/ntfs3/namei.c:146 vfs_link+0x3e0/0x590 fs/namei.c:4941 do_linkat+0x224/0x48c fs/namei.c:5011 __do_sys_linkat fs/namei.c:5039 [inline] __se_sys_linkat fs/namei.c:5036 [inline] __arm64_sys_linkat+0xdc/0xf8 fs/namei.c:5036 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (&ni->file.run_lock#2){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537 run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1124 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x1a00/0x2a90 fs/ntfs3/inode.c:541 ntfs_dir_emit fs/ntfs3/dir.c:337 [inline] ntfs_read_hdr+0x5f4/0x988 fs/ntfs3/dir.c:385 ntfs_readdir+0x664/0xb88 fs/ntfs3/dir.c:496 iterate_dir+0x2dc/0x478 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:410 [inline] __se_sys_getdents64 fs/readdir.c:396 [inline] __arm64_sys_getdents64+0x110/0x2fc fs/readdir.c:396 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 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 *** 3 locks held by syz.9.2159/13618: #0: ffff0000db709278 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x1fc/0x2a0 fs/file.c:1232 #1: ffff0000dd79e988 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: iterate_dir+0x224/0x478 fs/readdir.c:101 #2: ffff00010b59e270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x60c/0x998 fs/ntfs3/run.c:1105 stack backtrace: CPU: 0 UID: 0 PID: 13618 Comm: syz.9.2159 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (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:2043 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537 run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1124 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x1a00/0x2a90 fs/ntfs3/inode.c:541 ntfs_dir_emit fs/ntfs3/dir.c:337 [inline] ntfs_read_hdr+0x5f4/0x988 fs/ntfs3/dir.c:385 ntfs_readdir+0x664/0xb88 fs/ntfs3/dir.c:496 iterate_dir+0x2dc/0x478 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:410 [inline] __se_sys_getdents64 fs/readdir.c:396 [inline] __arm64_sys_getdents64+0x110/0x2fc fs/readdir.c:396 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 ntfs3(loop9): failed to convert name for inode 1e. ntfs3(loop9): ino=1f, mi_enum_attr