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-randconfig-001-20250126 (https://download.01.org/0day-ci/archive/20250126/202501262241.ZEkByWKM-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250126/202501262241.ZEkByWKM-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/202501262241.ZEkByWKM-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): mm/nommu.c: In function '__copy_remote_vm_str': >> mm/nommu.c:1717:9: error: 'vma' undeclared (first use in this function); did you mean 'vmap'? 1717 | vma = find_vma(mm, addr); | ^~~ | vmap mm/nommu.c:1717:9: note: each undeclared identifier is reported only once for each function it appears in In file included from include/linux/bitmap.h:13, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/mmzone.h:8, from include/linux/gfp.h:7, from include/linux/mm.h:7, from mm/nommu.c:20: >> mm/nommu.c:1725:44: error: passing argument 2 of 'sized_strscpy' makes pointer from integer without a cast [-Wint-conversion] 1725 | ret = strscpy(buf, addr, len); | ^~~~ | | | long unsigned int include/linux/string.h:82:28: note: in definition of macro '__strscpy1' 82 | sized_strscpy(dst, src, size + __must_be_cstr(dst) + __must_be_cstr(src)) | ^~~ mm/nommu.c:1725:31: note: in expansion of macro 'strscpy' 1725 | ret = strscpy(buf, addr, len); | ^~~~~~~ include/linux/string.h:72:31: note: expected 'const char *' but argument is of type 'long unsigned int' 72 | ssize_t sized_strscpy(char *, const char *, size_t); | ^~~~~~~~~~~~ vim +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
