loop2: detected capacity change from 0 to 4096 ntfs3(loop2): ino=3, Correct links count -> 2. ntfs3(loop2): failed to convert "0080" to cp874 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.1519/20769 is trying to acquire lock: ffff888028b562b0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:601 but task is already holding lock: ffff88803c4c3618 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1222 [inline] ffff88803c4c3618 (&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: -> #3 (&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] attr_data_get_block+0x1bf/0x2a0 fs/ntfs3/attrib.c:976 ntfs_iomap_begin+0x4f0/0xf10 fs/ntfs3/inode.c:771 iomap_iter+0x5f5/0xf80 fs/iomap/iter.c:110 iomap_readahead+0xa4a/0xe80 fs/iomap/buffered-io.c:721 ntfs_readahead+0x193/0x210 fs/ntfs3/inode.c:673 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:2704 filemap_splice_read+0x621/0xd70 mm/filemap.c:3093 do_splice_read fs/splice.c:980 [inline] splice_direct_to_actor+0x496/0xcc0 fs/splice.c:1084 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x19b/0x2a0 fs/splice.c:1228 do_sendfile+0x540/0x7e0 fs/read_write.c:1371 __do_sys_sendfile64 fs/read_write.c:1432 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1418 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 -> #2 (mapping.invalidate_lock#3){.+.+}-{4:4}: down_read+0x97/0x200 kernel/locking/rwsem.c:1574 filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] filemap_fault+0x6e0/0x13c0 mm/filemap.c:3570 __do_fault+0x138/0x2a0 mm/memory.c:5425 do_read_fault mm/memory.c:5860 [inline] do_fault mm/memory.c:5994 [inline] do_pte_missing+0x1828/0x28f0 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+0xa4d/0x1340 arch/x86/mm/fault.c:1343 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 -> #1 (vm_lock){++++}-{0:0}: __vma_start_exclude_readers+0x283/0x930 mm/mmap_lock.c:125 __vma_start_write+0xdc/0x290 mm/mmap_lock.c:148 vma_start_write include/linux/mmap_lock.h:303 [inline] mprotect_fixup+0x761/0xb10 mm/mprotect.c:801 setup_arg_pages+0x658/0xbd0 fs/exec.c:674 load_elf_binary+0xc85/0x2970 fs/binfmt_elf.c:1028 search_binary_handler fs/exec.c:1694 [inline] exec_binprm fs/exec.c:1726 [inline] bprm_execve+0x926/0x14b0 fs/exec.c:1778 kernel_execve+0x8c3/0x9c0 fs/exec.c:1922 try_to_run_init_process+0x13/0x60 init/main.c:1476 kernel_init+0xad/0x1d0 init/main.c:1604 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #0 (&mm->mmap_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+0x1520/0x2ce0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_read_killable+0xa4/0x220 kernel/locking/rwsem.c:1599 mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:601 get_mmap_lock_carefully mm/mmap_lock.c:450 [inline] lock_mm_and_find_vma+0x2d6/0x340 mm/mmap_lock.c:501 do_user_addr_fault+0x341/0x1340 arch/x86/mm/fault.c:1366 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: Chain exists of: &mm->mmap_lock --> mapping.invalidate_lock#3 --> &ni->ni_lock#2/5 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock#2/5); lock(mapping.invalidate_lock#3); lock(&ni->ni_lock#2/5); rlock(&mm->mmap_lock); *** DEADLOCK *** 3 locks held by syz.2.1519/20769: #0: ffff888024b12928 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x252/0x320 fs/file.c:1259 #1: ffff88803c4c38d0 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: iterate_dir+0x215/0x4e0 fs/readdir.c:103 #2: ffff88803c4c3618 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1222 [inline] #2: ffff88803c4c3618 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_readdir+0x752/0xec0 fs/ntfs3/dir.c:499 stack backtrace: CPU: 0 UID: 0 PID: 20769 Comm: syz.2.1519 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026 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_killable+0xa4/0x220 kernel/locking/rwsem.c:1599 mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:601 get_mmap_lock_carefully mm/mmap_lock.c:450 [inline] lock_mm_and_find_vma+0x2d6/0x340 mm/mmap_lock.c:501 do_user_addr_fault+0x341/0x1340 arch/x86/mm/fault.c:1366 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 a9 a3 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:ffffc90004e67ab0 EFLAGS: 00050293 RAX: 00000000000008c0 RBX: 0000200000001ff0 RCX: ffff88803add8000 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000000007 RBP: 0000000000000018 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed10075bb001 R12: ffff888034974000 R13: 0000000000000009 R14: 0000000000000009 R15: 0000200000001fd8 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: 0033:0x7fb94dd5de59 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:00007fb94bfb6028 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007fb94dfe5fa0 RCX: 00007fb94dd5de59 RDX: 0000000020002078 RSI: 0000200000001fc0 RDI: 0000000000000004 RBP: 00007fb94ddf3e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb94dfe6038 R14: 00007fb94dfe5fa0 R15: 00007ffd036bbff8 ---------------- 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 a9 a3 82 ff call 0xff82a3cb 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)