loop4: detected capacity change from 0 to 4096 ntfs3(loop4): Different NTFS sector size (4096) and media sector size (512). ntfs3(loop4): Failed to load $Extend (-22). ntfs3(loop4): Failed to initialize $Extend. ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc2-syzkaller-00087-g24770983ccfe #0 Not tainted ------------------------------------------------------ syz.4.5318/22617 is trying to acquire lock: ffff88802acb6270 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0xcc/0x720 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff888056dd7730 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x119/0x220 fs/ntfs3/inode.c:859 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_open.isra.0+0x4da/0x1580 fs/namei.c:3695 open_last_lookups fs/namei.c:3816 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4052 do_filp_open+0x20b/0x470 fs/namei.c:4082 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 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:861 ntfs_extend+0x7ca/0xa40 fs/ntfs3/file.c:343 ntfs_setattr+0x95d/0xc30 fs/ntfs3/file.c:760 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 vfs_truncate+0x5d6/0x6e0 fs/open.c:118 do_sys_truncate fs/open.c:141 [inline] __do_sys_truncate fs/open.c:153 [inline] __se_sys_truncate fs/open.c:151 [inline] __x64_sys_truncate+0x172/0x1e0 fs/open.c:151 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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.4.5318/22617: #0: ffff888023fd8428 (sb_writers#18){.+.+}-{0:0}, at: vfs_truncate+0x336/0x6e0 fs/open.c:96 #1: ffff888056dd7918 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:874 [inline] #1: ffff888056dd7918 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: do_truncate+0x146/0x230 fs/open.c:63 #2: ffff888056dd7680 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #2: ffff888056dd7680 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_set_size+0x111/0x220 fs/ntfs3/inode.c:858 #3: ffff888056dd7730 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x119/0x220 fs/ntfs3/inode.c:859 stack backtrace: CPU: 0 UID: 0 PID: 22617 Comm: syz.4.5318 Not tainted 6.16.0-rc2-syzkaller-00087-g24770983ccfe #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:2046 check_noncircular+0x14c/0x170 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+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 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:861 ntfs_extend+0x7ca/0xa40 fs/ntfs3/file.c:343 ntfs_setattr+0x95d/0xc30 fs/ntfs3/file.c:760 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 vfs_truncate+0x5d6/0x6e0 fs/open.c:118 do_sys_truncate fs/open.c:141 [inline] __do_sys_truncate fs/open.c:153 [inline] __se_sys_truncate fs/open.c:151 [inline] __x64_sys_truncate+0x172/0x1e0 fs/open.c:151 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fece738e929 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:00007fece82c9038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007fece75b5fa0 RCX: 00007fece738e929 RDX: 0000000000000000 RSI: 000000000008fff5 RDI: 0000200000000180 RBP: 00007fece7410b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fece75b5fa0 R15: 00007ffe0df12948