ntfs3: loop6: Mark volume as dirty due to NTFS errors ntfs3: loop6: Failed to load $Extend (-22). ntfs3: loop6: Failed to initialize $Extend. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.6.326/7697 is trying to acquire lock: ffff8880536f97d0 (&ni->file.run_lock#2){++++}-{3:3}, at: run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1122 but task is already holding lock: ffff88807ba2c270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x702/0xba0 fs/ntfs3/run.c:1103 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&wnd->rw_lock){++++}-{3:3}: down_write_nested+0x9e/0x1f0 kernel/locking/rwsem.c:1689 mark_as_free_ex+0x3e/0x380 fs/ntfs3/fsntfs.c:2484 run_deallocate_ex+0x188/0x2e0 fs/ntfs3/attrib.c:122 attr_collapse_range+0xc2e/0x1720 fs/ntfs3/attrib.c:1984 ntfs_fallocate+0x7c6/0xfd0 fs/ntfs3/file.c:558 vfs_fallocate+0x58e/0x700 fs/open.c:324 ksys_fallocate fs/open.c:347 [inline] __do_sys_fallocate fs/open.c:355 [inline] __se_sys_fallocate fs/open.c:353 [inline] __x64_sys_fallocate+0xc1/0x110 fs/open.c:353 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 (&ni->file.run_lock#2){++++}-{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_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_atomic_open+0x23b/0x520 fs/ntfs3/namei.c:408 atomic_open fs/namei.c:3359 [inline] lookup_open fs/namei.c:3467 [inline] open_last_lookups fs/namei.c:3564 [inline] path_openat+0xf27/0x3190 fs/namei.c:3794 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824 do_sys_openat2+0x12c/0x1c0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 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(&wnd->rw_lock); lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); rlock(&ni->file.run_lock#2); *** DEADLOCK *** 4 locks held by syz.6.326/7697: #0: ffff88807ba2e418 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff8880536fcd70 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff8880536fcd70 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: open_last_lookups fs/namei.c:3561 [inline] #1: ffff8880536fcd70 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: path_openat+0x7c6/0x3190 fs/namei.c:3794 #2: ffff8880536fcac0 (&ni->ni_lock/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1124 [inline] #2: ffff8880536fcac0 (&ni->ni_lock/6){+.+.}-{3:3}, at: ntfs_atomic_open+0x1ec/0x520 fs/ntfs3/namei.c:400 #3: ffff88807ba2c270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x702/0xba0 fs/ntfs3/run.c:1103 stack backtrace: CPU: 1 PID: 7697 Comm: syz.6.326 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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_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_atomic_open+0x23b/0x520 fs/ntfs3/namei.c:408 atomic_open fs/namei.c:3359 [inline] lookup_open fs/namei.c:3467 [inline] open_last_lookups fs/namei.c:3564 [inline] path_openat+0xf27/0x3190 fs/namei.c:3794 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824 do_sys_openat2+0x12c/0x1c0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 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: 0033:0x7f631e98f749 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:00007f631f8cc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f631ebe5fa0 RCX: 00007f631e98f749 RDX: 0000000000101042 RSI: 0000200000000040 RDI: ffffffffffffff9c RBP: 00007f631ea13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f631ebe6038 R14: 00007f631ebe5fa0 R15: 00007ffd765baed8