====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.3.301/8006 is trying to acquire lock: ffff88805e53caa8 (mapping.invalidate_lock#13){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline] ffff88805e53caa8 (mapping.invalidate_lock#13){++++}-{4:4}, at: filemap_fault+0x5d9/0x12c0 mm/filemap.c:3477 but task is already holding lock: ffff888027cf56c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1a3/0x450 mm/mmap_lock.c:238 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (vm_lock){++++}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __vma_enter_locked+0x182/0x380 mm/mmap_lock.c:63 __vma_start_write+0x1e/0x120 mm/mmap_lock.c:87 vma_start_write include/linux/mmap_lock.h:212 [inline] mprotect_fixup+0x578/0x9c0 mm/mprotect.c:828 setup_arg_pages+0x52a/0xa90 fs/exec.c:670 load_elf_binary+0xbad/0x2750 fs/binfmt_elf.c:1028 search_binary_handler fs/exec.c:1670 [inline] exec_binprm fs/exec.c:1702 [inline] bprm_execve+0x99c/0x1450 fs/exec.c:1754 kernel_execve+0x8f0/0x9f0 fs/exec.c:1920 try_to_run_init_process+0x13/0x60 init/main.c:1411 kernel_init+0xad/0x1d0 init/main.c:1539 ret_from_fork+0x4b9/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #2 (&mm->mmap_lock){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __might_fault+0xcc/0x130 mm/memory.c:7081 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2c/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] fiemap_fill_next_extent+0x1c0/0x390 fs/ioctl.c:144 ni_fiemap+0x89c/0xbf0 fs/ntfs3/frecord.c:2007 ntfs_fiemap+0x11d/0x1a0 fs/ntfs3/file.c:1354 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1185/0x1440 fs/ioctl.c:531 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ni->ni_lock#2/5){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/rtmutex_api.c:535 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:547 ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] ntfs_fallocate+0x7ca/0x10b0 fs/ntfs3/file.c:644 vfs_fallocate+0x66f/0x7f0 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+0xc0/0x110 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (mapping.invalidate_lock#13){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_read+0x97/0x1f0 kernel/locking/rwsem.c:1537 filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline] filemap_fault+0x5d9/0x12c0 mm/filemap.c:3477 __do_fault+0x135/0x390 mm/memory.c:5280 do_read_fault mm/memory.c:5698 [inline] do_fault mm/memory.c:5832 [inline] do_pte_missing mm/memory.c:4361 [inline] handle_pte_fault mm/memory.c:6177 [inline] __handle_mm_fault mm/memory.c:6318 [inline] handle_mm_fault+0x23c6/0x3400 mm/memory.c:6487 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#13 --> &mm->mmap_lock --> vm_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(vm_lock); lock(&mm->mmap_lock); lock(vm_lock); rlock(mapping.invalidate_lock#13); *** DEADLOCK *** 1 lock held by syz.3.301/8006: #0: ffff888027cf56c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1a3/0x450 mm/mmap_lock.c:238 stack backtrace: CPU: 0 UID: 0 PID: 8006 Comm: syz.3.301 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_read+0x97/0x1f0 kernel/locking/rwsem.c:1537 filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline] filemap_fault+0x5d9/0x12c0 mm/filemap.c:3477 __do_fault+0x135/0x390 mm/memory.c:5280 do_read_fault mm/memory.c:5698 [inline] do_fault mm/memory.c:5832 [inline] do_pte_missing mm/memory.c:4361 [inline] handle_pte_fault mm/memory.c:6177 [inline] __handle_mm_fault mm/memory.c:6318 [inline] handle_mm_fault+0x23c6/0x3400 mm/memory.c:6487 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f7708640a41 Code: 39 c6 7e 57 4c 8b 5f 20 48 8b 57 28 eb 06 0f 1f 00 4c 89 c2 49 39 d3 74 47 4c 8b 57 18 4c 8d 42 01 89 c1 83 c0 08 4c 89 47 28 <41> 0f b6 14 12 89 47 34 48 d3 e2 49 09 d1 39 f0 7c d5 44 89 ca 29 RSP: 002b:00007f77069dd4e8 EFLAGS: 00010202 RAX: 0000000000000008 RBX: 00007f77069dde28 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f77069dd5e0 RBP: 00007f77069dd5e0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000200000001bc2 R11: 000000000000029b R12: 0000000000000006 R13: 00007f77069ddef0 R14: 00007f77069ddeb0 R15: 00007f76fe5be000