loop4: detected capacity change from 0 to 4096 ntfs3: loop4: Different NTFS sector size (1024) and media sector size (512). ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.1988/15286 is trying to acquire lock: ffff888047fac270 (&wnd->rw_lock){++++}-{3:3}, at: ntfs_look_for_free_space+0xd4/0x600 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff888049c20910 (&ni->file.run_lock#2){++++}-{3:3}, at: ntfs_extend_mft+0x13e/0x450 fs/ntfs3/fsntfs.c:511 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->file.run_lock#2){++++}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1122 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x22e3/0x3760 fs/ntfs3/inode.c:534 dir_search_u+0x1e0/0x2b0 fs/ntfs3/dir.c:264 ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85 __lookup_slow+0x281/0x3b0 fs/namei.c:1702 lookup_slow+0x53/0x70 fs/namei.c:1719 walk_component+0x2be/0x3f0 fs/namei.c:2010 lookup_last fs/namei.c:2467 [inline] path_lookupat+0x169/0x440 fs/namei.c:2491 filename_lookup+0x1f4/0x510 fs/namei.c:2520 user_path_at_empty+0x42/0x60 fs/namei.c:2917 user_path_at include/linux/namei.h:57 [inline] do_fchownat+0x10c/0x270 fs/open.c:808 __do_sys_chown fs/open.c:834 [inline] __se_sys_chown fs/open.c:832 [inline] __x64_sys_chown+0x82/0x90 fs/open.c:832 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&wnd->rw_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write_nested+0x9e/0x1f0 kernel/locking/rwsem.c:1689 ntfs_look_for_free_space+0xd4/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c2/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a0/0x2c60 fs/ntfs3/attrib.c:575 ntfs_extend_mft+0x163/0x450 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x5f6/0xd40 fs/ntfs3/fsntfs.c:709 ni_create_attr_list+0x904/0x1370 fs/ntfs3/frecord.c:878 ni_ins_attr_ext+0x315/0x9c0 fs/ntfs3/frecord.c:976 ni_insert_attr fs/ntfs3/frecord.c:1143 [inline] ni_insert_resident fs/ntfs3/frecord.c:1527 [inline] ni_add_name+0x6e0/0xc90 fs/ntfs3/frecord.c:3042 ntfs_link_inode+0x132/0x170 fs/ntfs3/inode.c:1770 ntfs_link+0x118/0x2a0 fs/ntfs3/namei.c:156 vfs_link+0x4e4/0x680 fs/namei.c:4605 do_linkat+0x278/0x550 fs/namei.c:4676 __do_sys_link fs/namei.c:4710 [inline] __se_sys_link fs/namei.c:4708 [inline] __x64_sys_link+0x86/0x90 fs/namei.c:4708 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 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 *** 7 locks held by syz.4.1988/15286: #0: ffff888047fae418 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff888049c254d0 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline] #1: ffff888049c254d0 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: filename_create+0x1f6/0x460 fs/namei.c:3890 #2: ffff888049c25c30 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #2: ffff888049c25c30 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: vfs_link+0x3af/0x680 fs/namei.c:4596 #3: ffff888049c25220 (&ni->ni_lock#3/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1124 [inline] #3: ffff888049c25220 (&ni->ni_lock#3/6){+.+.}-{3:3}, at: ntfs_link+0xdb/0x2a0 fs/ntfs3/namei.c:149 #4: ffff888049c25980 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1119 [inline] #4: ffff888049c25980 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_link+0xf6/0x2a0 fs/ntfs3/namei.c:151 #5: ffff888047fac128 (&wnd->rw_lock/1){+.+.}-{3:3}, at: ntfs_look_free_mft+0x164/0xd40 fs/ntfs3/fsntfs.c:571 #6: ffff888049c20910 (&ni->file.run_lock#2){++++}-{3:3}, at: ntfs_extend_mft+0x13e/0x450 fs/ntfs3/fsntfs.c:511 stack backtrace: CPU: 0 PID: 15286 Comm: syz.4.1988 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write_nested+0x9e/0x1f0 kernel/locking/rwsem.c:1689 ntfs_look_for_free_space+0xd4/0x600 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1c2/0x6d0 fs/ntfs3/attrib.c:159 attr_set_size+0x14a0/0x2c60 fs/ntfs3/attrib.c:575 ntfs_extend_mft+0x163/0x450 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x5f6/0xd40 fs/ntfs3/fsntfs.c:709 ni_create_attr_list+0x904/0x1370 fs/ntfs3/frecord.c:878 ni_ins_attr_ext+0x315/0x9c0 fs/ntfs3/frecord.c:976 ni_insert_attr fs/ntfs3/frecord.c:1143 [inline] ni_insert_resident fs/ntfs3/frecord.c:1527 [inline] ni_add_name+0x6e0/0xc90 fs/ntfs3/frecord.c:3042 ntfs_link_inode+0x132/0x170 fs/ntfs3/inode.c:1770 ntfs_link+0x118/0x2a0 fs/ntfs3/namei.c:156 vfs_link+0x4e4/0x680 fs/namei.c:4605 do_linkat+0x278/0x550 fs/namei.c:4676 __do_sys_link fs/namei.c:4710 [inline] __se_sys_link fs/namei.c:4708 [inline] __x64_sys_link+0x86/0x90 fs/namei.c:4708 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff9e058f749 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:00007ff9e1447038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056 RAX: ffffffffffffffda RBX: 00007ff9e07e5fa0 RCX: 00007ff9e058f749 RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000000940 RBP: 00007ff9e0613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff9e07e6038 R14: 00007ff9e07e5fa0 R15: 00007fff7eae4458 ntfs3: loop4: ino=0, attr_set_size ntfs3: loop4: ino=0, attr_set_size ntfs3: loop4: no free space to extend mft