loop0: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected 6.17.0-rc1-syzkaller-00116-gd7ee5bdce789 #0 Not tainted ------------------------------------------------------ syz.0.9596/28465 is trying to acquire lock: ffff888043c54270 (&wnd->rw_lock){++++}-{4:4}, at: mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2464 but task is already holding lock: ffff88805543b518 (&ni->file.run_lock#2){++++}-{4:4}, at: attr_collapse_range+0x3bb/0x1470 fs/ntfs3/attrib.c:1904 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:1537 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_one_qstr_excl+0x1d1/0x250 fs/namei.c:1697 filename_create+0x1e7/0x4a0 fs/namei.c:4140 do_mknodat+0x18a/0x5d0 fs/namei.c:4272 __do_sys_mknodat fs/namei.c:4313 [inline] __se_sys_mknodat fs/namei.c:4310 [inline] __x64_sys_mknodat+0xaf/0xe0 fs/namei.c:4310 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 down_write_nested+0x96/0x210 kernel/locking/rwsem.c:1706 mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2464 run_deallocate_ex+0x1f4/0x310 fs/ntfs3/attrib.c:122 attr_collapse_range+0xa3f/0x1470 fs/ntfs3/attrib.c:1972 ntfs_fallocate+0xcc4/0x1170 fs/ntfs3/file.c:617 vfs_fallocate+0x5b4/0x10e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xd5/0x150 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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 *** 5 locks held by syz.0.9596/28465: #0: ffff888078d7c428 (sb_writers#13){.+.+}-{0:0}, at: ksys_fallocate fs/open.c:366 [inline] #0: ffff888078d7c428 (sb_writers#13){.+.+}-{0:0}, at: __do_sys_fallocate fs/open.c:371 [inline] #0: ffff888078d7c428 (sb_writers#13){.+.+}-{0:0}, at: __se_sys_fallocate fs/open.c:369 [inline] #0: ffff888078d7c428 (sb_writers#13){.+.+}-{0:0}, at: __x64_sys_fallocate+0xd5/0x150 fs/open.c:369 #1: ffff88805543b700 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #1: ffff88805543b700 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: ntfs_fallocate+0x28e/0x1170 fs/ntfs3/file.c:532 #2: ffff88805543b8a0 (mapping.invalidate_lock#12){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:924 [inline] #2: ffff88805543b8a0 (mapping.invalidate_lock#12){++++}-{4:4}, at: ntfs_fallocate+0x90d/0x1170 fs/ntfs3/file.c:546 #3: ffff88805543b468 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] #3: ffff88805543b468 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_fallocate+0xcaa/0x1170 fs/ntfs3/file.c:616 #4: ffff88805543b518 (&ni->file.run_lock#2){++++}-{4:4}, at: attr_collapse_range+0x3bb/0x1470 fs/ntfs3/attrib.c:1904 stack backtrace: CPU: 0 UID: 0 PID: 28465 Comm: syz.0.9596 Not tainted 6.17.0-rc1-syzkaller-00116-gd7ee5bdce789 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 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:2043 check_noncircular+0x14c/0x170 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+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 down_write_nested+0x96/0x210 kernel/locking/rwsem.c:1706 mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2464 run_deallocate_ex+0x1f4/0x310 fs/ntfs3/attrib.c:122 attr_collapse_range+0xa3f/0x1470 fs/ntfs3/attrib.c:1972 ntfs_fallocate+0xcc4/0x1170 fs/ntfs3/file.c:617 vfs_fallocate+0x5b4/0x10e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xd5/0x150 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3ce4d8ebe9 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:00007f3ce2ff6038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f3ce4fb5fa0 RCX: 00007f3ce4d8ebe9 RDX: 0000000000004000 RSI: 0000000000000008 RDI: 0000000000000004 RBP: 00007f3ce4e11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000007000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3ce4fb6038 R14: 00007f3ce4fb5fa0 R15: 00007ffdd84bb698