====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.158/6792 is trying to acquire lock: ffff888060646098 (mapping.invalidate_lock#6){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] ffff888060646098 (mapping.invalidate_lock#6){++++}-{4:4}, at: do_page_cache_ra mm/readahead.c:347 [inline] ffff888060646098 (mapping.invalidate_lock#6){++++}-{4:4}, at: page_cache_ra_order+0x2b1/0x4a0 mm/readahead.c:558 but task is already holding lock: ffff888062752e80 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1222 [inline] ffff888062752e80 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_readdir+0x752/0xec0 fs/ntfs3/dir.c:499 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->ni_lock#2/5){+.+.}-{4:4}: __mutex_lock_common kernel/locking/rtmutex_api.c:559 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:578 ni_lock fs/ntfs3/ntfs_fs.h:1222 [inline] ntfs_fallocate+0x914/0xf70 fs/ntfs3/file.c:617 vfs_fallocate+0x663/0x7f0 fs/open.c:338 ksys_fallocate fs/open.c:362 [inline] __do_sys_fallocate fs/open.c:367 [inline] __se_sys_fallocate fs/open.c:365 [inline] __x64_sys_fallocate+0xbf/0x110 fs/open.c:365 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (mapping.invalidate_lock#6){++++}-{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+0x1520/0x2ce0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_read+0x97/0x200 kernel/locking/rwsem.c:1574 filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] do_page_cache_ra mm/readahead.c:347 [inline] page_cache_ra_order+0x2b1/0x4a0 mm/readahead.c:558 do_sync_mmap_readahead+0x4d6/0x7c0 mm/filemap.c:3428 filemap_fault+0x7e2/0x13c0 mm/filemap.c:3582 __do_fault+0x138/0x2a0 mm/memory.c:5425 do_shared_fault mm/memory.c:5924 [inline] do_fault mm/memory.c:5998 [inline] do_pte_missing+0x659/0x28f0 mm/memory.c:4566 handle_pte_fault mm/memory.c:6379 [inline] __handle_mm_fault mm/memory.c:6517 [inline] handle_mm_fault+0xd28/0x13f0 mm/memory.c:6686 do_user_addr_fault+0x744/0x1340 arch/x86/mm/fault.c:1394 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 stac arch/x86/include/asm/smap.h:-1 [inline] filldir+0x29f/0x630 fs/readdir.c:286 dir_emit include/linux/fs.h:3587 [inline] ntfs_dir_emit fs/ntfs3/dir.c:346 [inline] ntfs_read_hdr+0x8a4/0xc10 fs/ntfs3/dir.c:387 ntfs_readdir+0x9ea/0xec0 fs/ntfs3/dir.c:547 iterate_dir+0x2f1/0x4e0 fs/readdir.c:110 __do_sys_getdents fs/readdir.c:319 [inline] __se_sys_getdents+0xf1/0x270 fs/readdir.c:304 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 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->ni_lock#2/5); lock(mapping.invalidate_lock#6); lock(&ni->ni_lock#2/5); rlock(mapping.invalidate_lock#6); *** DEADLOCK *** 3 locks held by syz.2.158/6792: #0: ffff888032fcab28 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x252/0x320 fs/file.c:1259 #1: ffff888062753138 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: iterate_dir+0x215/0x4e0 fs/readdir.c:103 #2: ffff888062752e80 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1222 [inline] #2: ffff888062752e80 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_readdir+0x752/0xec0 fs/ntfs3/dir.c:499 stack backtrace: CPU: 1 UID: 0 PID: 6792 Comm: syz.2.158 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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+0x1520/0x2ce0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_read+0x97/0x200 kernel/locking/rwsem.c:1574 filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] do_page_cache_ra mm/readahead.c:347 [inline] page_cache_ra_order+0x2b1/0x4a0 mm/readahead.c:558 do_sync_mmap_readahead+0x4d6/0x7c0 mm/filemap.c:3428 filemap_fault+0x7e2/0x13c0 mm/filemap.c:3582 __do_fault+0x138/0x2a0 mm/memory.c:5425 do_shared_fault mm/memory.c:5924 [inline] do_fault mm/memory.c:5998 [inline] do_pte_missing+0x659/0x28f0 mm/memory.c:4566 handle_pte_fault mm/memory.c:6379 [inline] __handle_mm_fault mm/memory.c:6517 [inline] handle_mm_fault+0xd28/0x13f0 mm/memory.c:6686 do_user_addr_fault+0x744/0x1340 arch/x86/mm/fault.c:1394 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0010:filldir+0x29f/0x630 fs/readdir.c:288 Code: df 49 29 ef 48 b8 00 f0 ff ff ff 7f 00 00 49 39 c7 4c 0f 47 f8 bf 07 00 00 00 44 89 f6 e8 39 9d 82 ff 0f 01 cb 48 8b 44 24 20 <49> 89 47 08 48 bd 00 00 00 00 00 fc ff df 48 8b 44 24 40 48 89 03 RSP: 0018:ffffc90004fbfab0 EFLAGS: 00050297 RAX: 0000000000000920 RBX: 0000200000002010 RCX: ffff8880256c8000 RDX: 0000000000000002 RSI: 0000000000000009 RDI: 0000000000000007 RBP: 0000000000000020 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1004ad9001 R12: ffff88803a674000 R13: 0000000000000009 R14: 0000000000000009 R15: 0000200000001ff0 dir_emit include/linux/fs.h:3587 [inline] ntfs_dir_emit fs/ntfs3/dir.c:346 [inline] ntfs_read_hdr+0x8a4/0xc10 fs/ntfs3/dir.c:387 ntfs_readdir+0x9ea/0xec0 fs/ntfs3/dir.c:547 iterate_dir+0x2f1/0x4e0 fs/readdir.c:110 __do_sys_getdents fs/readdir.c:319 [inline] __se_sys_getdents+0xf1/0x270 fs/readdir.c:304 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3508c5de99 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:00007f3506e95028 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f3508ee6090 RCX: 00007f3508c5de99 RDX: 00000000000000b8 RSI: 0000200000001fc0 RDI: 0000000000000009 RBP: 00007f3508cf3eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3508ee6128 R14: 00007f3508ee6090 R15: 00007ffc10520a38 ntfs3(loop2): failed to convert name for inode 1e. ntfs3(loop2): ino=1f, mi_enum_attr ---------------- Code disassembly (best guess): 0: df 49 29 fisttps 0x29(%rcx) 3: ef out %eax,(%dx) 4: 48 b8 00 f0 ff ff ff movabs $0x7ffffffff000,%rax b: 7f 00 00 e: 49 39 c7 cmp %rax,%r15 11: 4c 0f 47 f8 cmova %rax,%r15 15: bf 07 00 00 00 mov $0x7,%edi 1a: 44 89 f6 mov %r14d,%esi 1d: e8 39 9d 82 ff call 0xff829d5b 22: 0f 01 cb stac 25: 48 8b 44 24 20 mov 0x20(%rsp),%rax * 2a: 49 89 47 08 mov %rax,0x8(%r15) <-- trapping instruction 2e: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp 35: fc ff df 38: 48 8b 44 24 40 mov 0x40(%rsp),%rax 3d: 48 89 03 mov %rax,(%rbx)