loop7: detected capacity change from 0 to 4096 ntfs3(loop7): Different NTFS sector size (4096) and media sector size (512). ntfs3(loop7): Mark volume as dirty due to NTFS errors ntfs3(loop7): Failed to initialize $Extend/$Reparse. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.7.1920/25035 is trying to acquire lock: ffff8880681374e0 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x7fa/0xb90 fs/ntfs3/run.c:1135 but task is already holding lock: ffff888031e14258 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x732/0xb90 fs/ntfs3/run.c:1116 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&wnd->rw_lock){++++}-{4:4}: down_write_nested+0x3e/0x60 kernel/locking/rwsem.c:1706 ntfs_look_for_free_space+0xd9/0x650 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1bd/0x6b0 fs/ntfs3/attrib.c:159 attr_set_size+0x14cf/0x2cf0 fs/ntfs3/attrib.c:574 ntfs_extend_mft+0x169/0x460 fs/ntfs3/fsntfs.c:512 ntfs_look_free_mft+0x646/0xd70 fs/ntfs3/fsntfs.c:709 ntfs_create_inode+0x5a2/0x34b0 fs/ntfs3/inode.c:1305 ntfs_mkdir+0x3d/0x50 fs/ntfs3/namei.c:215 vfs_mkdir+0x40b/0x630 fs/namei.c:5233 filename_mkdirat+0x289/0x520 fs/namei.c:5266 __do_sys_mkdirat fs/namei.c:5287 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5284 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ni->file.run_lock#2){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 down_read+0x97/0x200 kernel/locking/rwsem.c:1537 run_unpack_ex+0x7fa/0xb90 fs/ntfs3/run.c:1135 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x2416/0x38f0 fs/ntfs3/inode.c:542 dir_search_u+0x1fd/0x2e0 fs/ntfs3/dir.c:265 ntfs_lookup+0x100/0x1d0 fs/ntfs3/namei.c:85 __lookup_slow+0x2d2/0x440 fs/namei.c:1916 lookup_slow+0x53/0x70 fs/namei.c:1933 walk_component fs/namei.c:2279 [inline] lookup_last fs/namei.c:2780 [inline] path_lookupat+0x3f5/0x8c0 fs/namei.c:2804 filename_lookup+0x256/0x5d0 fs/namei.c:2833 do_sys_truncate+0xbb/0x1c0 fs/open.c:140 __do_sys_truncate fs/open.c:154 [inline] __se_sys_truncate fs/open.c:152 [inline] __x64_sys_truncate+0x5b/0x70 fs/open.c:152 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 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(&wnd->rw_lock); lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); rlock(&ni->file.run_lock#2); *** DEADLOCK *** 3 locks held by syz.7.1920/25035: #0: ffff8880682ee798 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1043 [inline] #0: ffff8880682ee798 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1932 #1: ffff8880682ee4e0 (&ni->ni_lock/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1132 [inline] #1: ffff8880682ee4e0 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_lookup+0xf3/0x1d0 fs/ntfs3/namei.c:84 #2: ffff888031e14258 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x732/0xb90 fs/ntfs3/run.c:1116 stack backtrace: CPU: 0 UID: 0 PID: 25035 Comm: syz.7.1920 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 down_read+0x97/0x200 kernel/locking/rwsem.c:1537 run_unpack_ex+0x7fa/0xb90 fs/ntfs3/run.c:1135 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x2416/0x38f0 fs/ntfs3/inode.c:542 dir_search_u+0x1fd/0x2e0 fs/ntfs3/dir.c:265 ntfs_lookup+0x100/0x1d0 fs/ntfs3/namei.c:85 __lookup_slow+0x2d2/0x440 fs/namei.c:1916 lookup_slow+0x53/0x70 fs/namei.c:1933 walk_component fs/namei.c:2279 [inline] lookup_last fs/namei.c:2780 [inline] path_lookupat+0x3f5/0x8c0 fs/namei.c:2804 filename_lookup+0x256/0x5d0 fs/namei.c:2833 do_sys_truncate+0xbb/0x1c0 fs/open.c:140 __do_sys_truncate fs/open.c:154 [inline] __se_sys_truncate fs/open.c:152 [inline] __x64_sys_truncate+0x5b/0x70 fs/open.c:152 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb4ef65bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb4ed8ae028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007fb4ef8d5fa0 RCX: 00007fb4ef65bf79 RDX: 0000000000000000 RSI: 00000000000042dc RDI: 00002000000001c0 RBP: 00007fb4ef6f27e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb4ef8d6038 R14: 00007fb4ef8d5fa0 R15: 00007fffe4f24c48