Hi Wei, kernel test robot noticed the following build errors: [auto build test ERROR on brauner-vfs/vfs.all] [also build test ERROR on akpm-mm/mm-everything crng-random/master linus/master v6.16-rc6 next-20250716] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Wei-Gao/fs-proc-Use-inode_get_dev-for-device-numbers-in-procmap_query/20250716-103031 base: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all patch link: https://lore.kernel.org/r/20250716142732.3385310-1-wegao%40suse.com patch subject: [PATCH] fs/proc: Use inode_get_dev() for device numbers in procmap_query config: i386-buildonly-randconfig-002-20250716 (https://download.01.org/0day-ci/archive/20250717/202507170038.QWz19iZa-lkp@xxxxxxxxx/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250717/202507170038.QWz19iZa-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202507170038.QWz19iZa-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> fs/proc/task_mmu.c:521:26: error: call to undeclared function 'inode_get_dev'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 521 | karg.dev_major = MAJOR(inode_get_dev(inode)); | ^ fs/proc/task_mmu.c:521:26: note: did you mean 'inode_get_bytes'? include/linux/fs.h:3567:8: note: 'inode_get_bytes' declared here 3567 | loff_t inode_get_bytes(struct inode *inode); | ^ 1 error generated. vim +/inode_get_dev +521 fs/proc/task_mmu.c 453 454 static int do_procmap_query(struct proc_maps_private *priv, void __user *uarg) 455 { 456 struct procmap_query karg; 457 struct vm_area_struct *vma; 458 struct mm_struct *mm; 459 const char *name = NULL; 460 char build_id_buf[BUILD_ID_SIZE_MAX], *name_buf = NULL; 461 __u64 usize; 462 int err; 463 464 if (copy_from_user(&usize, (void __user *)uarg, sizeof(usize))) 465 return -EFAULT; 466 /* argument struct can never be that large, reject abuse */ 467 if (usize > PAGE_SIZE) 468 return -E2BIG; 469 /* argument struct should have at least query_flags and query_addr fields */ 470 if (usize < offsetofend(struct procmap_query, query_addr)) 471 return -EINVAL; 472 err = copy_struct_from_user(&karg, sizeof(karg), uarg, usize); 473 if (err) 474 return err; 475 476 /* reject unknown flags */ 477 if (karg.query_flags & ~PROCMAP_QUERY_VALID_FLAGS_MASK) 478 return -EINVAL; 479 /* either both buffer address and size are set, or both should be zero */ 480 if (!!karg.vma_name_size != !!karg.vma_name_addr) 481 return -EINVAL; 482 if (!!karg.build_id_size != !!karg.build_id_addr) 483 return -EINVAL; 484 485 mm = priv->mm; 486 if (!mm || !mmget_not_zero(mm)) 487 return -ESRCH; 488 489 err = query_vma_setup(mm); 490 if (err) { 491 mmput(mm); 492 return err; 493 } 494 495 vma = query_matching_vma(mm, karg.query_addr, karg.query_flags); 496 if (IS_ERR(vma)) { 497 err = PTR_ERR(vma); 498 vma = NULL; 499 goto out; 500 } 501 502 karg.vma_start = vma->vm_start; 503 karg.vma_end = vma->vm_end; 504 505 karg.vma_flags = 0; 506 if (vma->vm_flags & VM_READ) 507 karg.vma_flags |= PROCMAP_QUERY_VMA_READABLE; 508 if (vma->vm_flags & VM_WRITE) 509 karg.vma_flags |= PROCMAP_QUERY_VMA_WRITABLE; 510 if (vma->vm_flags & VM_EXEC) 511 karg.vma_flags |= PROCMAP_QUERY_VMA_EXECUTABLE; 512 if (vma->vm_flags & VM_MAYSHARE) 513 karg.vma_flags |= PROCMAP_QUERY_VMA_SHARED; 514 515 karg.vma_page_size = vma_kernel_pagesize(vma); 516 517 if (vma->vm_file) { 518 const struct inode *inode = file_user_inode(vma->vm_file); 519 520 karg.vma_offset = ((__u64)vma->vm_pgoff) << PAGE_SHIFT; > 521 karg.dev_major = MAJOR(inode_get_dev(inode)); 522 karg.dev_minor = MINOR(inode_get_dev(inode)); 523 karg.inode = inode->i_ino; 524 } else { 525 karg.vma_offset = 0; 526 karg.dev_major = 0; 527 karg.dev_minor = 0; 528 karg.inode = 0; 529 } 530 531 if (karg.build_id_size) { 532 __u32 build_id_sz; 533 534 err = build_id_parse(vma, build_id_buf, &build_id_sz); 535 if (err) { 536 karg.build_id_size = 0; 537 } else { 538 if (karg.build_id_size < build_id_sz) { 539 err = -ENAMETOOLONG; 540 goto out; 541 } 542 karg.build_id_size = build_id_sz; 543 } 544 } 545 546 if (karg.vma_name_size) { 547 size_t name_buf_sz = min_t(size_t, PATH_MAX, karg.vma_name_size); 548 const struct path *path; 549 const char *name_fmt; 550 size_t name_sz = 0; 551 552 get_vma_name(vma, &path, &name, &name_fmt); 553 554 if (path || name_fmt || name) { 555 name_buf = kmalloc(name_buf_sz, GFP_KERNEL); 556 if (!name_buf) { 557 err = -ENOMEM; 558 goto out; 559 } 560 } 561 if (path) { 562 name = d_path(path, name_buf, name_buf_sz); 563 if (IS_ERR(name)) { 564 err = PTR_ERR(name); 565 goto out; 566 } 567 name_sz = name_buf + name_buf_sz - name; 568 } else if (name || name_fmt) { 569 name_sz = 1 + snprintf(name_buf, name_buf_sz, name_fmt ?: "%s", name); 570 name = name_buf; 571 } 572 if (name_sz > name_buf_sz) { 573 err = -ENAMETOOLONG; 574 goto out; 575 } 576 karg.vma_name_size = name_sz; 577 } 578 579 /* unlock vma or mmap_lock, and put mm_struct before copying data to user */ 580 query_vma_teardown(mm, vma); 581 mmput(mm); 582 583 if (karg.vma_name_size && copy_to_user(u64_to_user_ptr(karg.vma_name_addr), 584 name, karg.vma_name_size)) { 585 kfree(name_buf); 586 return -EFAULT; 587 } 588 kfree(name_buf); 589 590 if (karg.build_id_size && copy_to_user(u64_to_user_ptr(karg.build_id_addr), 591 build_id_buf, karg.build_id_size)) 592 return -EFAULT; 593 594 if (copy_to_user(uarg, &karg, min_t(size_t, sizeof(karg), usize))) 595 return -EFAULT; 596 597 return 0; 598 599 out: 600 query_vma_teardown(mm, vma); 601 mmput(mm); 602 kfree(name_buf); 603 return err; 604 } 605 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
