Hi Jordan, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/master] [also build test ERROR on bpf/master linus/master v6.13 next-20250124] [cannot apply to akpm-mm/mm-everything] [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/Jordan-Rome/bpf-Add-bpf_copy_from_user_task_str-kfunc/20250126-204439 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20250126124147.3154108-1-linux%40jordanrome.com patch subject: [bpf-next v4 1/3] mm: add copy_remote_vm_str config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20250126/202501262133.9mKauA5U-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250126/202501262133.9mKauA5U-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/202501262133.9mKauA5U-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> mm/nommu.c:1717:2: error: use of undeclared identifier 'vma' 1717 | vma = find_vma(mm, addr); | ^ mm/nommu.c:1718:6: error: use of undeclared identifier 'vma'; did you mean 'vmap'? 1718 | if (vma) { | ^~~ | vmap mm/nommu.c:303:15: note: 'vmap' declared here 303 | EXPORT_SYMBOL(vmap); | ^ mm/nommu.c:1720:21: error: use of undeclared identifier 'vma' 1720 | if (addr + len >= vma->vm_end) | ^ mm/nommu.c:1721:10: error: use of undeclared identifier 'vma' 1721 | len = vma->vm_end - addr; | ^ mm/nommu.c:1724:7: error: use of undeclared identifier 'vma' 1724 | if (vma->vm_flags & VM_MAYREAD) { | ^ >> mm/nommu.c:1725:23: error: incompatible integer to pointer conversion passing 'unsigned long' to parameter of type 'const char *' [-Wint-conversion] 1725 | ret = strscpy(buf, addr, len); | ^~~~ include/linux/string.h:113:55: note: expanded from macro 'strscpy' 113 | CONCATENATE(__strscpy, COUNT_ARGS(__VA_ARGS__))(dst, src, __VA_ARGS__) | ^~~ include/linux/string.h:82:21: note: expanded from macro '__strscpy1' 82 | sized_strscpy(dst, src, size + __must_be_cstr(dst) + __must_be_cstr(src)) | ^~~ include/linux/string.h:72:43: note: passing argument to parameter here 72 | ssize_t sized_strscpy(char *, const char *, size_t); | ^ 6 errors generated. vim +/vma +1717 mm/nommu.c 1703 1704 /* 1705 * Copy a string from another process's address space as given in mm. 1706 * If there is any error return -EFAULT. 1707 */ 1708 static int __copy_remote_vm_str(struct mm_struct *mm, unsigned long addr, 1709 void *buf, int len) 1710 { 1711 int ret; 1712 1713 if (mmap_read_lock_killable(mm)) 1714 return -EFAULT; 1715 1716 /* the access must start within one of the target process's mappings */ > 1717 vma = find_vma(mm, addr); 1718 if (vma) { 1719 /* don't overrun this mapping */ > 1720 if (addr + len >= vma->vm_end) 1721 len = vma->vm_end - addr; 1722 1723 /* only read mappings where it is permitted */ 1724 if (vma->vm_flags & VM_MAYREAD) { > 1725 ret = strscpy(buf, addr, len); 1726 if (ret < 0) 1727 ret = len - 1; 1728 } else { 1729 ret = -EFAULT; 1730 } 1731 } else { 1732 ret = -EFAULT; 1733 } 1734 1735 mmap_read_unlock(mm); 1736 return ret; 1737 } 1738 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
