tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-4.9 head: 1d9ee2ed0ebfa7cca1286ea38ff684f3102d0232 commit: afac5432e118c065119448f138fd24c3084f952d [107/150] s390/gmap: validate VMA in __gmap_zap() config: s390-randconfig-r044-20211114 (attached as .config) compiler: s390-linux-gcc (GCC) 7.5.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-stable pending-4.9 git checkout afac5432e118c065119448f138fd24c3084f952d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): arch/s390/mm/gmap.c: In function '__gmap_zap': vma = vma_lookup(gmap->mm, vmaddr); ^~~~~~~~~~ __d_lookup vma = vma_lookup(gmap->mm, vmaddr); ^ arch/s390/mm/gmap.c: In function '__gmap_unshadow_sgt': arch/s390/mm/gmap.c:1199:16: warning: variable 'asce' set but not used [-Wunused-but-set-variable] unsigned long asce, *pgt; ^~~~ arch/s390/mm/gmap.c: In function '__gmap_unshadow_r3t': arch/s390/mm/gmap.c:1257:16: warning: variable 'asce' set but not used [-Wunused-but-set-variable] unsigned long asce, *sgt; ^~~~ arch/s390/mm/gmap.c: In function '__gmap_unshadow_r2t': arch/s390/mm/gmap.c:1315:16: warning: variable 'asce' set but not used [-Wunused-but-set-variable] unsigned long asce, *r3t; ^~~~ cc1: some warnings being treated as errors vim +665 arch/s390/mm/gmap.c 648 649 /* 650 * this function is assumed to be called with mmap_sem held 651 */ 652 void __gmap_zap(struct gmap *gmap, unsigned long gaddr) 653 { 654 struct vm_area_struct *vma; 655 unsigned long vmaddr; 656 spinlock_t *ptl; 657 pte_t *ptep; 658 659 /* Find the vm address for the guest address */ 660 vmaddr = (unsigned long) radix_tree_lookup(&gmap->guest_to_host, 661 gaddr >> PMD_SHIFT); 662 if (vmaddr) { 663 vmaddr |= gaddr & ~PMD_MASK; 664 666 if (!vma || is_vm_hugetlb_page(vma)) 667 return; 668 669 /* Get pointer to the page table entry */ 670 ptep = get_locked_pte(gmap->mm, vmaddr, &ptl); 671 if (likely(ptep)) 672 ptep_zap_unused(gmap->mm, vmaddr, ptep, 0); 673 pte_unmap_unlock(ptep, ptl); 674 } 675 } 676 EXPORT_SYMBOL_GPL(__gmap_zap); 677 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org