====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.7.2014/22721 is trying to acquire lock: ffff888031e8ace0 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault mm/memory.c:6958 [inline] ffff888031e8ace0 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0xe3/0x190 mm/memory.c:6952 but task is already holding lock: ffff8880586a4288 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] ffff8880586a4288 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_fiemap+0x131/0x170 fs/ntfs3/file.c:1324 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ni->ni_lock#3/5){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x193/0x1060 kernel/locking/mutex.c:760 ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] ntfs_fallocate+0x6ef/0x1170 fs/ntfs3/file.c:561 vfs_fallocate+0x5b4/0x10e0 fs/open.c:342 ioctl_preallocate+0x1a0/0x210 fs/ioctl.c:289 file_ioctl fs/ioctl.c:332 [inline] do_vfs_ioctl+0x11da/0x14f0 fs/ioctl.c:576 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (mapping.invalidate_lock#8){++++}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1537 filemap_invalidate_lock_shared include/linux/fs.h:1044 [inline] filemap_fault+0x2d8/0x2930 mm/filemap.c:3433 __do_fault+0x10d/0x490 mm/memory.c:5152 do_shared_fault mm/memory.c:5637 [inline] do_fault mm/memory.c:5711 [inline] do_pte_missing+0x1a6/0x3ba0 mm/memory.c:4234 handle_pte_fault mm/memory.c:6052 [inline] __handle_mm_fault+0x152a/0x2a50 mm/memory.c:6195 handle_mm_fault+0x589/0xd10 mm/memory.c:6364 do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 -> #1 (vm_lock){++++}-{0:0}: __vma_enter_locked+0x1d8/0x3f0 mm/mmap_lock.c:63 __vma_start_write+0x1d/0x140 mm/mmap_lock.c:87 vma_start_write include/linux/mmap_lock.h:297 [inline] mprotect_fixup+0x323/0xb40 mm/mprotect.c:828 setup_arg_pages+0x4a9/0xbc0 fs/exec.c:670 load_elf_binary+0xb5b/0x4fe0 fs/binfmt_elf.c:1028 search_binary_handler fs/exec.c:1670 [inline] exec_binprm fs/exec.c:1702 [inline] bprm_execve fs/exec.c:1754 [inline] bprm_execve+0x8be/0x1640 fs/exec.c:1730 kernel_execve+0x2ef/0x3b0 fs/exec.c:1920 try_to_run_init_process init/main.c:1399 [inline] kernel_init+0x14a/0x2b0 init/main.c:1527 ret_from_fork+0x56d/0x730 arch/x86/kernel/process.c:148 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+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 __might_fault mm/memory.c:6958 [inline] __might_fault+0x113/0x190 mm/memory.c:6952 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2d/0xd0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] fiemap_fill_next_extent+0x239/0x390 fs/ioctl.c:144 ni_fiemap+0x40d/0xbf0 fs/ntfs3/frecord.c:2007 ntfs_fiemap+0x144/0x170 fs/ntfs3/file.c:1326 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x447/0x14f0 fs/ioctl.c:531 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 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#8 --> &ni->ni_lock#3/5 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock#3/5); lock(mapping.invalidate_lock#8); lock(&ni->ni_lock#3/5); rlock(&mm->mmap_lock); *** DEADLOCK *** 1 lock held by syz.7.2014/22721: #0: ffff8880586a4288 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] #0: ffff8880586a4288 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_fiemap+0x131/0x170 fs/ntfs3/file.c:1324 stack backtrace: CPU: 1 UID: 0 PID: 22721 Comm: syz.7.2014 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 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 __might_fault mm/memory.c:6958 [inline] __might_fault+0x113/0x190 mm/memory.c:6952 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2d/0xd0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] fiemap_fill_next_extent+0x239/0x390 fs/ioctl.c:144 ni_fiemap+0x40d/0xbf0 fs/ntfs3/frecord.c:2007 ntfs_fiemap+0x144/0x170 fs/ntfs3/file.c:1326 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x447/0x14f0 fs/ioctl.c:531 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4ae518eec9 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:00007f4ae5f96038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f4ae53e6090 RCX: 00007f4ae518eec9 RDX: 0000200000000280 RSI: 00000000c020660b RDI: 0000000000000007 RBP: 00007f4ae5211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4ae53e6128 R14: 00007f4ae53e6090 R15: 00007fffeceac278