tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d31958b30ea3b7b6e522d6bf449427748ad45822 commit: 628a164a8dbe75ab0a60883e64956d4229c34306 [7218/7247] Merge branch 'akpm-current/current' config: arm64-allyesconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 628a164a8dbe75ab0a60883e64956d4229c34306 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/arm64/kernel/mte.c: In function '__access_remote_tags': 224 | ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags, | ^~~ | | | struct task_struct * In file included from arch/arm64/kernel/mte.c:8: include/linux/mm.h:1704:46: note: expected 'struct mm_struct *' but argument is of type 'struct task_struct *' 1704 | long get_user_pages_remote(struct mm_struct *mm, | ~~~~~~~~~~~~~~~~~~^~ arch/arm64/kernel/mte.c:224:36: warning: passing argument 2 of 'get_user_pages_remote' makes integer from pointer without a cast [-Wint-conversion] 224 | ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags, | ^~ | | | struct mm_struct * In file included from arch/arm64/kernel/mte.c:8: include/linux/mm.h:1705:22: note: expected 'long unsigned int' but argument is of type 'struct mm_struct *' 1705 | unsigned long start, unsigned long nr_pages, | ~~~~~~~~~~~~~~^~~~~ arch/arm64/kernel/mte.c:224:49: warning: passing argument 5 of 'get_user_pages_remote' makes pointer from integer without a cast [-Wint-conversion] 224 | ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags, | ^~~~~~~~~ | | | unsigned int In file included from arch/arm64/kernel/mte.c:8: include/linux/mm.h:1706:46: note: expected 'struct page **' but argument is of type 'unsigned int' 1706 | unsigned int gup_flags, struct page **pages, | ~~~~~~~~~~~~~~^~~~~ arch/arm64/kernel/mte.c:225:10: error: passing argument 6 of 'get_user_pages_remote' from incompatible pointer type [-Werror=incompatible-pointer-types] 225 | &page, &vma, NULL); | ^~~~~ | | | struct page ** In file included from arch/arm64/kernel/mte.c:8: include/linux/mm.h:1707:32: note: expected 'struct vm_area_struct **' but argument is of type 'struct page **' 1707 | struct vm_area_struct **vmas, int *locked); | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~ arch/arm64/kernel/mte.c:225:17: error: passing argument 7 of 'get_user_pages_remote' from incompatible pointer type [-Werror=incompatible-pointer-types] 225 | &page, &vma, NULL); | ^~~~ | | | struct vm_area_struct ** In file included from arch/arm64/kernel/mte.c:8: include/linux/mm.h:1707:43: note: expected 'int *' but argument is of type 'struct vm_area_struct **' 1707 | struct vm_area_struct **vmas, int *locked); | ~~~~~^~~~~~ 224 | ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags, | ^~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm64/kernel/mte.c:8: include/linux/mm.h:1704:6: note: declared here 1704 | long get_user_pages_remote(struct mm_struct *mm, | ^~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/get_user_pages_remote +224 arch/arm64/kernel/mte.c e76b573f11d1c5 Catalin Marinas 2020-03-30 197 e76b573f11d1c5 Catalin Marinas 2020-03-30 198 /* e76b573f11d1c5 Catalin Marinas 2020-03-30 199 * Access MTE tags in another process' address space as given in mm. Update e76b573f11d1c5 Catalin Marinas 2020-03-30 200 * the number of tags copied. Return 0 if any tags copied, error otherwise. e76b573f11d1c5 Catalin Marinas 2020-03-30 201 * Inspired by __access_remote_vm(). e76b573f11d1c5 Catalin Marinas 2020-03-30 202 */ e76b573f11d1c5 Catalin Marinas 2020-03-30 203 static int __access_remote_tags(struct task_struct *tsk, struct mm_struct *mm, e76b573f11d1c5 Catalin Marinas 2020-03-30 204 unsigned long addr, struct iovec *kiov, e76b573f11d1c5 Catalin Marinas 2020-03-30 205 unsigned int gup_flags) e76b573f11d1c5 Catalin Marinas 2020-03-30 206 { e76b573f11d1c5 Catalin Marinas 2020-03-30 207 struct vm_area_struct *vma; e76b573f11d1c5 Catalin Marinas 2020-03-30 208 void __user *buf = kiov->iov_base; e76b573f11d1c5 Catalin Marinas 2020-03-30 209 size_t len = kiov->iov_len; e76b573f11d1c5 Catalin Marinas 2020-03-30 210 int ret; e76b573f11d1c5 Catalin Marinas 2020-03-30 211 int write = gup_flags & FOLL_WRITE; e76b573f11d1c5 Catalin Marinas 2020-03-30 212 e76b573f11d1c5 Catalin Marinas 2020-03-30 213 if (!access_ok(buf, len)) e76b573f11d1c5 Catalin Marinas 2020-03-30 214 return -EFAULT; e76b573f11d1c5 Catalin Marinas 2020-03-30 215 e76b573f11d1c5 Catalin Marinas 2020-03-30 216 if (mmap_read_lock_killable(mm)) e76b573f11d1c5 Catalin Marinas 2020-03-30 217 return -EIO; e76b573f11d1c5 Catalin Marinas 2020-03-30 218 e76b573f11d1c5 Catalin Marinas 2020-03-30 219 while (len) { e76b573f11d1c5 Catalin Marinas 2020-03-30 220 unsigned long tags, offset; e76b573f11d1c5 Catalin Marinas 2020-03-30 221 void *maddr; e76b573f11d1c5 Catalin Marinas 2020-03-30 222 struct page *page = NULL; e76b573f11d1c5 Catalin Marinas 2020-03-30 223 e76b573f11d1c5 Catalin Marinas 2020-03-30 @224 ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags, e76b573f11d1c5 Catalin Marinas 2020-03-30 225 &page, &vma, NULL); e76b573f11d1c5 Catalin Marinas 2020-03-30 226 if (ret <= 0) e76b573f11d1c5 Catalin Marinas 2020-03-30 227 break; e76b573f11d1c5 Catalin Marinas 2020-03-30 228 e76b573f11d1c5 Catalin Marinas 2020-03-30 229 /* e76b573f11d1c5 Catalin Marinas 2020-03-30 230 * Only copy tags if the page has been mapped as PROT_MTE e76b573f11d1c5 Catalin Marinas 2020-03-30 231 * (PG_mte_tagged set). Otherwise the tags are not valid and e76b573f11d1c5 Catalin Marinas 2020-03-30 232 * not accessible to user. Moreover, an mprotect(PROT_MTE) e76b573f11d1c5 Catalin Marinas 2020-03-30 233 * would cause the existing tags to be cleared if the page e76b573f11d1c5 Catalin Marinas 2020-03-30 234 * was never mapped with PROT_MTE. e76b573f11d1c5 Catalin Marinas 2020-03-30 235 */ e76b573f11d1c5 Catalin Marinas 2020-03-30 236 if (!test_bit(PG_mte_tagged, &page->flags)) { e76b573f11d1c5 Catalin Marinas 2020-03-30 237 ret = -EOPNOTSUPP; e76b573f11d1c5 Catalin Marinas 2020-03-30 238 put_page(page); e76b573f11d1c5 Catalin Marinas 2020-03-30 239 break; e76b573f11d1c5 Catalin Marinas 2020-03-30 240 } e76b573f11d1c5 Catalin Marinas 2020-03-30 241 e76b573f11d1c5 Catalin Marinas 2020-03-30 242 /* limit access to the end of the page */ e76b573f11d1c5 Catalin Marinas 2020-03-30 243 offset = offset_in_page(addr); e76b573f11d1c5 Catalin Marinas 2020-03-30 244 tags = min(len, (PAGE_SIZE - offset) / MTE_GRANULE_SIZE); e76b573f11d1c5 Catalin Marinas 2020-03-30 245 e76b573f11d1c5 Catalin Marinas 2020-03-30 246 maddr = page_address(page); e76b573f11d1c5 Catalin Marinas 2020-03-30 247 if (write) { e76b573f11d1c5 Catalin Marinas 2020-03-30 248 tags = mte_copy_tags_from_user(maddr + offset, buf, tags); e76b573f11d1c5 Catalin Marinas 2020-03-30 249 set_page_dirty_lock(page); e76b573f11d1c5 Catalin Marinas 2020-03-30 250 } else { e76b573f11d1c5 Catalin Marinas 2020-03-30 251 tags = mte_copy_tags_to_user(buf, maddr + offset, tags); e76b573f11d1c5 Catalin Marinas 2020-03-30 252 } e76b573f11d1c5 Catalin Marinas 2020-03-30 253 put_page(page); e76b573f11d1c5 Catalin Marinas 2020-03-30 254 e76b573f11d1c5 Catalin Marinas 2020-03-30 255 /* error accessing the tracer's buffer */ e76b573f11d1c5 Catalin Marinas 2020-03-30 256 if (!tags) e76b573f11d1c5 Catalin Marinas 2020-03-30 257 break; e76b573f11d1c5 Catalin Marinas 2020-03-30 258 e76b573f11d1c5 Catalin Marinas 2020-03-30 259 len -= tags; e76b573f11d1c5 Catalin Marinas 2020-03-30 260 buf += tags; e76b573f11d1c5 Catalin Marinas 2020-03-30 261 addr += tags * MTE_GRANULE_SIZE; e76b573f11d1c5 Catalin Marinas 2020-03-30 262 } e76b573f11d1c5 Catalin Marinas 2020-03-30 263 mmap_read_unlock(mm); e76b573f11d1c5 Catalin Marinas 2020-03-30 264 e76b573f11d1c5 Catalin Marinas 2020-03-30 265 /* return an error if no tags copied */ e76b573f11d1c5 Catalin Marinas 2020-03-30 266 kiov->iov_len = buf - kiov->iov_base; e76b573f11d1c5 Catalin Marinas 2020-03-30 267 if (!kiov->iov_len) { e76b573f11d1c5 Catalin Marinas 2020-03-30 268 /* check for error accessing the tracee's address space */ e76b573f11d1c5 Catalin Marinas 2020-03-30 269 if (ret <= 0) e76b573f11d1c5 Catalin Marinas 2020-03-30 270 return -EIO; e76b573f11d1c5 Catalin Marinas 2020-03-30 271 else e76b573f11d1c5 Catalin Marinas 2020-03-30 272 return -EFAULT; e76b573f11d1c5 Catalin Marinas 2020-03-30 273 } e76b573f11d1c5 Catalin Marinas 2020-03-30 274 e76b573f11d1c5 Catalin Marinas 2020-03-30 275 return 0; e76b573f11d1c5 Catalin Marinas 2020-03-30 276 } e76b573f11d1c5 Catalin Marinas 2020-03-30 277 :::::: The code at line 224 was first introduced by commit :::::: e76b573f11d1c560e3dfcf8e66702a8ed7c0c70d arm64: mte: Add PTRACE_{PEEK,POKE}MTETAGS support :::::: TO: Catalin Marinas <catalin.marinas(a)arm.com&gt; :::::: CC: Catalin Marinas <catalin.marinas(a)arm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org