loop5: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc6-syzkaller-00052-g9f35e33144ae #0 Not tainted ------------------------------------------------------ syz.5.4909/16732 is trying to acquire lock: ffff8880587f6270 (&wnd->rw_lock){++++}-{4:4}, at: mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2460 but task is already holding lock: ffff888059ab1060 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:524 [inline] ffff888059ab1060 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_setattr+0x4cc/0xc30 fs/ntfs3/file.c:843 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:3679 open_last_lookups fs/namei.c:3800 [inline] path_openat+0x905/0x2d40 fs/namei.c:4036 do_filp_open+0x20b/0x470 fs/namei.c:4066 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1455 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 mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2460 run_deallocate_ex+0x1f4/0x310 fs/ntfs3/attrib.c:122 attr_set_size+0xc5f/0x2c50 fs/ntfs3/attrib.c:753 ntfs_truncate fs/ntfs3/file.c:525 [inline] ntfs_setattr+0x596/0xc30 fs/ntfs3/file.c:843 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x15b/0x220 fs/open.c:65 handle_truncate fs/namei.c:3501 [inline] do_open fs/namei.c:3884 [inline] path_openat+0x2761/0x2d40 fs/namei.c:4039 do_filp_open+0x20b/0x470 fs/namei.c:4066 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1448 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.5.4909/16732: #0: ffff8880587f4420 (sb_writers#18){.+.+}-{0:0}, at: do_open fs/namei.c:3873 [inline] #0: ffff8880587f4420 (sb_writers#18){.+.+}-{0:0}, at: path_openat+0x2375/0x2d40 fs/namei.c:4039 #1: ffff888059ab1248 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff888059ab1248 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: do_truncate+0x14a/0x220 fs/open.c:63 #2: ffff888059ab0fb0 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] #2: ffff888059ab0fb0 (&ni->ni_lock/5){+.+.}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:522 [inline] #2: ffff888059ab0fb0 (&ni->ni_lock/5){+.+.}-{4:4}, at: ntfs_setattr+0x4c4/0xc30 fs/ntfs3/file.c:843 #3: ffff888059ab1060 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:524 [inline] #3: ffff888059ab1060 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_setattr+0x4cc/0xc30 fs/ntfs3/file.c:843 stack backtrace: CPU: 0 UID: 0 PID: 16732 Comm: syz.5.4909 Not tainted 6.15.0-rc6-syzkaller-00052-g9f35e33144ae #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 mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2460 run_deallocate_ex+0x1f4/0x310 fs/ntfs3/attrib.c:122 attr_set_size+0xc5f/0x2c50 fs/ntfs3/attrib.c:753 ntfs_truncate fs/ntfs3/file.c:525 [inline] ntfs_setattr+0x596/0xc30 fs/ntfs3/file.c:843 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x15b/0x220 fs/open.c:65 handle_truncate fs/namei.c:3501 [inline] do_open fs/namei.c:3884 [inline] path_openat+0x2761/0x2d40 fs/namei.c:4039 do_filp_open+0x20b/0x470 fs/namei.c:4066 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1448 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: 0033:0x7fd18cf8e969 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:00007fd18de38038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fd18d1b5fa0 RCX: 00007fd18cf8e969 RDX: 0000000000000000 RSI: 000000000014967d RDI: 00002000000001c0 RBP: 00007fd18d010ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd18d1b5fa0 R15: 00007ffec0c1c0d8