loop0: detected capacity change from 0 to 4096 ntfs3(loop0): Different NTFS sector size (4096) and media sector size (512). ntfs3(loop0): Failed to load $Extend (-22). ntfs3(loop0): Failed to initialize $Extend. ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc6-syzkaller-00047-ge9565e23cd89 #0 Not tainted ------------------------------------------------------ syz.0.3825/15067 is trying to acquire lock: ffff888012190270 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0xcc/0x720 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff8880572e43c8 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x119/0x220 fs/ntfs3/inode.c:855 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->file.run_lock#2){++++}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 run_unpack_ex+0x671/0x740 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0xd97/0x3ab0 fs/ntfs3/inode.c:540 dir_search_u+0x163/0x3a0 fs/ntfs3/dir.c:264 ntfs_lookup+0x1c5/0x2a0 fs/ntfs3/namei.c:85 lookup_one_qstr_excl_raw.part.0+0xef/0x160 fs/namei.c:1689 lookup_one_qstr_excl_raw fs/namei.c:1677 [inline] lookup_one_qstr_excl+0x3e/0x120 fs/namei.c:1711 filename_create+0x1e7/0x4a0 fs/namei.c:4133 do_mknodat+0x18a/0x5d0 fs/namei.c:4265 __do_sys_mknod fs/namei.c:4311 [inline] __se_sys_mknod fs/namei.c:4309 [inline] __x64_sys_mknod+0x87/0xb0 fs/namei.c:4309 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&wnd->rw_lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 down_write_nested+0x96/0x210 kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0xcc/0x720 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x3ff/0x6f0 fs/ntfs3/attrib.c:159 attr_set_size+0x15ae/0x2c50 fs/ntfs3/attrib.c:574 ntfs_set_size+0x13d/0x220 fs/ntfs3/inode.c:857 ntfs_extend+0x7dd/0xa70 fs/ntfs3/file.c:427 ntfs_setattr+0x95d/0xc30 fs/ntfs3/file.c:845 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x15b/0x220 fs/open.c:65 vfs_truncate+0x5d6/0x6e0 fs/open.c:115 do_sys_truncate fs/open.c:138 [inline] __do_sys_truncate fs/open.c:150 [inline] __se_sys_truncate fs/open.c:148 [inline] __x64_sys_truncate+0x172/0x1e0 fs/open.c:148 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); *** DEADLOCK *** 4 locks held by syz.0.3825/15067: #0: ffff888012192420 (sb_writers#12){.+.+}-{0:0}, at: vfs_truncate+0x336/0x6e0 fs/open.c:93 #1: ffff8880572e45b0 (&sb->s_type->i_mutex_key#30){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff8880572e45b0 (&sb->s_type->i_mutex_key#30){+.+.}-{4:4}, at: do_truncate+0x14a/0x220 fs/open.c:63 #2: ffff8880572e4318 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] #2: ffff8880572e4318 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_set_size+0x111/0x220 fs/ntfs3/inode.c:854 #3: ffff8880572e43c8 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x119/0x220 fs/ntfs3/inode.c:855 stack backtrace: CPU: 1 UID: 0 PID: 15067 Comm: syz.0.3825 Not tainted 6.15.0-rc6-syzkaller-00047-ge9565e23cd89 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2079 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 down_write_nested+0x96/0x210 kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0xcc/0x720 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x3ff/0x6f0 fs/ntfs3/attrib.c:159 attr_set_size+0x15ae/0x2c50 fs/ntfs3/attrib.c:574 ntfs_set_size+0x13d/0x220 fs/ntfs3/inode.c:857 ntfs_extend+0x7dd/0xa70 fs/ntfs3/file.c:427 ntfs_setattr+0x95d/0xc30 fs/ntfs3/file.c:845 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x15b/0x220 fs/open.c:65 vfs_truncate+0x5d6/0x6e0 fs/open.c:115 do_sys_truncate fs/open.c:138 [inline] __do_sys_truncate fs/open.c:150 [inline] __se_sys_truncate fs/open.c:148 [inline] __x64_sys_truncate+0x172/0x1e0 fs/open.c:148 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f403d98e969 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:00007f403e79a038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007f403dbb5fa0 RCX: 00007f403d98e969 RDX: 0000000000000000 RSI: 000000000008fff5 RDI: 0000200000000180 RBP: 00007f403da10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f403dbb5fa0 R15: 00007fffd9fdc908