loop3: detected capacity change from 0 to 4096 ntfs3(loop3): Mark volume as dirty due to NTFS errors ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 Not tainted ------------------------------------------------------ syz.3.1372/10707 is trying to acquire lock: ffff88805c642270 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff88807b09b518 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x140/0x200 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}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 run_unpack_ex+0x7e5/0xba0 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x232b/0x37c0 fs/ntfs3/inode.c:540 dir_search_u+0x1df/0x2c0 fs/ntfs3/dir.c:264 ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85 lookup_open fs/namei.c:3679 [inline] open_last_lookups fs/namei.c:3800 [inline] path_openat+0x1101/0x3830 fs/namei.c:4036 do_filp_open+0x1fa/0x410 fs/namei.c:4066 do_sys_openat2+0x121/0x1c0 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+0x11e/0x150 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 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+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_write_nested+0x9d/0x200 kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c1/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a4/0x2c70 fs/ntfs3/attrib.c:574 ntfs_set_size+0x164/0x200 fs/ntfs3/inode.c:857 ntfs_extend+0x1d0/0xa20 fs/ntfs3/file.c:427 ntfs_file_write_iter+0x3f4/0x820 fs/ntfs3/file.c:1282 do_iter_readv_writev+0x56e/0x7f0 fs/read_write.c:-1 vfs_writev+0x306/0x9a0 fs/read_write.c:1055 do_pwritev fs/read_write.c:1151 [inline] __do_sys_pwritev2 fs/read_write.c:1209 [inline] __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1200 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 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.3.1372/10707: #0: ffff88805c640420 (sb_writers#22){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline] #0: ffff88805c640420 (sb_writers#22){.+.+}-{0:0}, at: vfs_writev+0x274/0x9a0 fs/read_write.c:1053 #1: ffff88807b09b700 (&sb->s_type->i_mutex_key#29){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:887 [inline] #1: ffff88807b09b700 (&sb->s_type->i_mutex_key#29){+.+.}-{4:4}, at: ntfs_file_write_iter+0x78/0x820 fs/ntfs3/file.c:1250 #2: ffff88807b09b468 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] #2: ffff88807b09b468 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_set_size+0x131/0x200 fs/ntfs3/inode.c:854 #3: ffff88807b09b518 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:855 stack backtrace: CPU: 0 UID: 0 PID: 10707 Comm: syz.3.1372 Not tainted 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2079 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_write_nested+0x9d/0x200 kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0xd3/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c1/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a4/0x2c70 fs/ntfs3/attrib.c:574 ntfs_set_size+0x164/0x200 fs/ntfs3/inode.c:857 ntfs_extend+0x1d0/0xa20 fs/ntfs3/file.c:427 ntfs_file_write_iter+0x3f4/0x820 fs/ntfs3/file.c:1282 do_iter_readv_writev+0x56e/0x7f0 fs/read_write.c:-1 vfs_writev+0x306/0x9a0 fs/read_write.c:1055 do_pwritev fs/read_write.c:1151 [inline] __do_sys_pwritev2 fs/read_write.c:1209 [inline] __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1200 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f718e98e969 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:00007f718f851038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f718ebb5fa0 RCX: 00007f718e98e969 RDX: 0000000000000001 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007f718ea10ab1 R08: 00000000000003ff R09: 0000000000000015 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f718ebb5fa0 R15: 00007ffdf639bfe8