tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-4.14 head: a67b765989deadd03ac363cb8616888a19ad3931 commit: ff65578d514341990a07acb386fad50cc31abc97 [130/187] s390/mm: validate VMA in PGSTE manipulation functions config: s390-randconfig-r001-20211114 (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-4.14 git checkout ff65578d514341990a07acb386fad50cc31abc97 # 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 warnings (new ones prefixed by >>): arch/s390/mm/pgtable.c: In function 'pgste_perform_essa': arch/s390/mm/pgtable.c:910:8: error: implicit declaration of function 'vma_lookup'; did you mean 'key_lookup'? [-Werror=implicit-function-declaration] vma = vma_lookup(mm, hva); ^~~~~~~~~~ key_lookup vma = vma_lookup(mm, hva); ^ arch/s390/mm/pgtable.c: In function 'set_pgste_bits': arch/s390/mm/pgtable.c:1010:6: warning: assignment makes pointer from integer without a cast [-Wint-conversion] vma = vma_lookup(mm, hva); ^ arch/s390/mm/pgtable.c: In function 'get_pgste': arch/s390/mm/pgtable.c:1041:6: warning: assignment makes pointer from integer without a cast [-Wint-conversion] vma = vma_lookup(mm, hva); ^ cc1: some warnings being treated as errors vim +910 arch/s390/mm/pgtable.c 883 884 /** 885 * pgste_perform_essa - perform ESSA actions on the PGSTE. 886 * @mm: the memory context. It must have PGSTEs, no check is performed here! 887 * @hva: the host virtual address of the page whose PGSTE is to be processed 888 * @orc: the specific action to perform, see the ESSA_SET_* macros. 889 * @oldpte: the PTE will be saved there if the pointer is not NULL. 890 * @oldpgste: the old PGSTE will be saved there if the pointer is not NULL. 891 * 892 * Return: 1 if the page is to be added to the CBRL, otherwise 0, 893 * or < 0 in case of error. -EINVAL is returned for invalid values 894 * of orc, -EFAULT for invalid addresses. 895 */ 896 int pgste_perform_essa(struct mm_struct *mm, unsigned long hva, int orc, 897 unsigned long *oldpte, unsigned long *oldpgste) 898 { 899 struct vm_area_struct *vma; 900 unsigned long pgstev; 901 spinlock_t *ptl; 902 pgste_t pgste; 903 pte_t *ptep; 904 int res = 0; 905 906 WARN_ON_ONCE(orc > ESSA_MAX); 907 if (unlikely(orc > ESSA_MAX)) 908 return -EINVAL; 909 911 if (!vma || is_vm_hugetlb_page(vma)) 912 return -EFAULT; 913 ptep = get_locked_pte(mm, hva, &ptl); 914 if (unlikely(!ptep)) 915 return -EFAULT; 916 pgste = pgste_get_lock(ptep); 917 pgstev = pgste_val(pgste); 918 if (oldpte) 919 *oldpte = pte_val(*ptep); 920 if (oldpgste) 921 *oldpgste = pgstev; 922 923 switch (orc) { 924 case ESSA_GET_STATE: 925 break; 926 case ESSA_SET_STABLE: 927 pgstev &= ~(_PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT); 928 pgstev |= _PGSTE_GPS_USAGE_STABLE; 929 break; 930 case ESSA_SET_UNUSED: 931 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 932 pgstev |= _PGSTE_GPS_USAGE_UNUSED; 933 if (pte_val(*ptep) & _PAGE_INVALID) 934 res = 1; 935 break; 936 case ESSA_SET_VOLATILE: 937 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 938 pgstev |= _PGSTE_GPS_USAGE_VOLATILE; 939 if (pte_val(*ptep) & _PAGE_INVALID) 940 res = 1; 941 break; 942 case ESSA_SET_POT_VOLATILE: 943 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 944 if (!(pte_val(*ptep) & _PAGE_INVALID)) { 945 pgstev |= _PGSTE_GPS_USAGE_POT_VOLATILE; 946 break; 947 } 948 if (pgstev & _PGSTE_GPS_ZERO) { 949 pgstev |= _PGSTE_GPS_USAGE_VOLATILE; 950 break; 951 } 952 if (!(pgstev & PGSTE_GC_BIT)) { 953 pgstev |= _PGSTE_GPS_USAGE_VOLATILE; 954 res = 1; 955 break; 956 } 957 break; 958 case ESSA_SET_STABLE_RESIDENT: 959 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 960 pgstev |= _PGSTE_GPS_USAGE_STABLE; 961 /* 962 * Since the resident state can go away any time after this 963 * call, we will not make this page resident. We can revisit 964 * this decision if a guest will ever start using this. 965 */ 966 break; 967 case ESSA_SET_STABLE_IF_RESIDENT: 968 if (!(pte_val(*ptep) & _PAGE_INVALID)) { 969 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 970 pgstev |= _PGSTE_GPS_USAGE_STABLE; 971 } 972 break; 973 case ESSA_SET_STABLE_NODAT: 974 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 975 pgstev |= _PGSTE_GPS_USAGE_STABLE | _PGSTE_GPS_NODAT; 976 break; 977 default: 978 /* we should never get here! */ 979 break; 980 } 981 /* If we are discarding a page, set it to logical zero */ 982 if (res) 983 pgstev |= _PGSTE_GPS_ZERO; 984 985 pgste_val(pgste) = pgstev; 986 pgste_set_unlock(ptep, pgste); 987 pte_unmap_unlock(ptep, ptl); 988 return res; 989 } 990 EXPORT_SYMBOL(pgste_perform_essa); 991 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org