ntfs3(loop5): ino=1f, mi_enum_attr ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.5.413/11644 is trying to acquire lock: ffff88803a4aabd0 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] ffff88803a4aabd0 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: do_page_cache_ra mm/readahead.c:347 [inline] ffff88803a4aabd0 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: page_cache_ra_order+0x2b1/0x4a0 mm/readahead.c:558 but task is already holding lock: ffff88803a4f5cd0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] ffff88803a4f5cd0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_readdir+0x717/0xf70 fs/ntfs3/dir.c:541 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:561 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:580 ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976 ntfs_iomap_begin+0x4f0/0xf30 fs/ntfs3/inode.c:978 iomap_iter_next include/linux/iomap.h:382 [inline] ntfs_iomap_next+0x5b6/0x880 fs/ntfs3/inode.c:2319 iomap_iter+0xe2/0xec0 fs/iomap/iter.c:122 iomap_readahead+0xa4a/0xe80 fs/iomap/buffered-io.c:751 ntfs_readahead+0x193/0x210 fs/ntfs3/inode.c:880 read_pages+0x193/0x5a0 mm/readahead.c:174 page_cache_ra_unbounded+0x679/0x8f0 mm/readahead.c:315 do_page_cache_ra mm/readahead.c:348 [inline] page_cache_ra_order+0x2c1/0x4a0 mm/readahead.c:558 filemap_get_pages+0x493/0x1e80 mm/filemap.c:2714 filemap_read+0x429/0x11e0 mm/filemap.c:2824 __kernel_read+0x4d3/0x970 fs/read_write.c:532 integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:222 [inline] ima_calc_file_hash+0x45d/0x8a0 security/integrity/ima/ima_crypto.c:280 ima_collect_measurement+0x521/0xa10 security/integrity/ima/ima_api.c:300 process_measurement+0x1282/0x1c20 security/integrity/ima/ima_main.c:425 ima_file_check+0xe1/0x130 security/integrity/ima/ima_main.c:685 security_file_post_open+0xb3/0x260 security/security.c:2755 do_open fs/namei.c:4839 [inline] path_openat+0x148a/0x1d60 fs/namei.c:5000 do_file_open+0x23e/0x4a0 fs/namei.c:5029 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1434 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (mapping.invalidate_lock#9){.+.+}-{4:4}: check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 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:3443 filemap_fault+0x7e2/0x13c0 mm/filemap.c:3597 __do_fault+0x138/0x2a0 mm/memory.c:5565 do_shared_fault mm/memory.c:6064 [inline] do_fault mm/memory.c:6138 [inline] do_pte_missing+0x659/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0x746/0x1340 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:3607 [inline] ntfs_dir_emit fs/ntfs3/dir.c:388 [inline] ntfs_read_hdr+0x8a7/0xc10 fs/ntfs3/dir.c:429 ntfs_readdir+0x9ab/0xf70 fs/ntfs3/dir.c:589 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:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 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#9); lock(&ni->ni_lock#2/5); rlock(mapping.invalidate_lock#9); *** DEADLOCK *** locks held by syz.5.413/11644: 3, last CPU#0: #0: ffff88805d8f6728 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x252/0x320 fs/file.c:1259 #1: ffff88803a4f5f98 (&type->i_mutex_dir_key#18){++++}-{4:4}, at: iterate_dir+0x215/0x4e0 fs/readdir.c:103 #2: ffff88803a4f5cd0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] #2: ffff88803a4f5cd0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_readdir+0x717/0xf70 fs/ntfs3/dir.c:541 stack backtrace: CPU: 0 UID: 0 PID: 11644 Comm: syz.5.413 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219 check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 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:3443 filemap_fault+0x7e2/0x13c0 mm/filemap.c:3597 __do_fault+0x138/0x2a0 mm/memory.c:5565 do_shared_fault mm/memory.c:6064 [inline] do_fault mm/memory.c:6138 [inline] do_pte_missing+0x659/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0x746/0x1340 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 e9 35 7f 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:ffffc900058bfab0 EFLAGS: 00050297 RAX: 0000000000000c30 RBX: 0000200000002160 RCX: ffff888036d3be80 RDX: 0000000000000002 RSI: 0000000000000005 RDI: 0000000000000007 RBP: 0000000000000020 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1006da77d1 R12: ffff888031fe2000 R13: 0000000000000005 R14: 0000000000000005 R15: 0000200000002140 dir_emit include/linux/fs.h:3607 [inline] ntfs_dir_emit fs/ntfs3/dir.c:388 [inline] ntfs_read_hdr+0x8a7/0xc10 fs/ntfs3/dir.c:429 ntfs_readdir+0x9ab/0xf70 fs/ntfs3/dir.c:589 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:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3e3402e159 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:00007f3e32286028 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f3e342b5fa0 RCX: 00007f3e3402e159 RDX: 0000000020002078 RSI: 0000200000001fc0 RDI: 0000000000000008 RBP: 00007f3e340c503b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3e342b6038 R14: 00007f3e342b5fa0 R15: 00007ffe053a3398 ---------------- 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 e9 35 7f ff call 0xff7f360b 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)