tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-5.10 head: 28d8a1bafb1d3ba5b9e84a0ef9f7505340737187 commit: 4709f4c79c5d802c30a92b70a4646e72752f02b6 [327/511] s390/mm: validate VMA in PGSTE manipulation functions config: s390-buildonly-randconfig-r002-20211114 (attached as .config) compiler: s390-linux-gcc (GCC) 11.2.0 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-5.10 git checkout 4709f4c79c5d802c30a92b70a4646e72752f02b6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 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/pgtable.c: In function 'pgste_perform_essa': 1002 | vma = vma_lookup(mm, hva); | ^~~~~~~~~~ | key_lookup 1002 | vma = vma_lookup(mm, hva); | ^ arch/s390/mm/pgtable.c: In function 'set_pgste_bits': arch/s390/mm/pgtable.c:1102:13: warning: assignment to 'struct vm_area_struct *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 1102 | vma = vma_lookup(mm, hva); | ^ arch/s390/mm/pgtable.c: In function 'get_pgste': arch/s390/mm/pgtable.c:1133:13: warning: assignment to 'struct vm_area_struct *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 1133 | vma = vma_lookup(mm, hva); | ^ cc1: some warnings being treated as errors vim +1002 arch/s390/mm/pgtable.c 975 976 /** 977 * pgste_perform_essa - perform ESSA actions on the PGSTE. 978 * @mm: the memory context. It must have PGSTEs, no check is performed here! 979 * @hva: the host virtual address of the page whose PGSTE is to be processed 980 * @orc: the specific action to perform, see the ESSA_SET_* macros. 981 * @oldpte: the PTE will be saved there if the pointer is not NULL. 982 * @oldpgste: the old PGSTE will be saved there if the pointer is not NULL. 983 * 984 * Return: 1 if the page is to be added to the CBRL, otherwise 0, 985 * or < 0 in case of error. -EINVAL is returned for invalid values 986 * of orc, -EFAULT for invalid addresses. 987 */ 988 int pgste_perform_essa(struct mm_struct *mm, unsigned long hva, int orc, 989 unsigned long *oldpte, unsigned long *oldpgste) 990 { 991 struct vm_area_struct *vma; 992 unsigned long pgstev; 993 spinlock_t *ptl; 994 pgste_t pgste; 995 pte_t *ptep; 996 int res = 0; 997 998 WARN_ON_ONCE(orc > ESSA_MAX); 999 if (unlikely(orc > ESSA_MAX)) 1000 return -EINVAL; 1001 1003 if (!vma || is_vm_hugetlb_page(vma)) 1004 return -EFAULT; 1005 ptep = get_locked_pte(mm, hva, &ptl); 1006 if (unlikely(!ptep)) 1007 return -EFAULT; 1008 pgste = pgste_get_lock(ptep); 1009 pgstev = pgste_val(pgste); 1010 if (oldpte) 1011 *oldpte = pte_val(*ptep); 1012 if (oldpgste) 1013 *oldpgste = pgstev; 1014 1015 switch (orc) { 1016 case ESSA_GET_STATE: 1017 break; 1018 case ESSA_SET_STABLE: 1019 pgstev &= ~(_PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT); 1020 pgstev |= _PGSTE_GPS_USAGE_STABLE; 1021 break; 1022 case ESSA_SET_UNUSED: 1023 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 1024 pgstev |= _PGSTE_GPS_USAGE_UNUSED; 1025 if (pte_val(*ptep) & _PAGE_INVALID) 1026 res = 1; 1027 break; 1028 case ESSA_SET_VOLATILE: 1029 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 1030 pgstev |= _PGSTE_GPS_USAGE_VOLATILE; 1031 if (pte_val(*ptep) & _PAGE_INVALID) 1032 res = 1; 1033 break; 1034 case ESSA_SET_POT_VOLATILE: 1035 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 1036 if (!(pte_val(*ptep) & _PAGE_INVALID)) { 1037 pgstev |= _PGSTE_GPS_USAGE_POT_VOLATILE; 1038 break; 1039 } 1040 if (pgstev & _PGSTE_GPS_ZERO) { 1041 pgstev |= _PGSTE_GPS_USAGE_VOLATILE; 1042 break; 1043 } 1044 if (!(pgstev & PGSTE_GC_BIT)) { 1045 pgstev |= _PGSTE_GPS_USAGE_VOLATILE; 1046 res = 1; 1047 break; 1048 } 1049 break; 1050 case ESSA_SET_STABLE_RESIDENT: 1051 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 1052 pgstev |= _PGSTE_GPS_USAGE_STABLE; 1053 /* 1054 * Since the resident state can go away any time after this 1055 * call, we will not make this page resident. We can revisit 1056 * this decision if a guest will ever start using this. 1057 */ 1058 break; 1059 case ESSA_SET_STABLE_IF_RESIDENT: 1060 if (!(pte_val(*ptep) & _PAGE_INVALID)) { 1061 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 1062 pgstev |= _PGSTE_GPS_USAGE_STABLE; 1063 } 1064 break; 1065 case ESSA_SET_STABLE_NODAT: 1066 pgstev &= ~_PGSTE_GPS_USAGE_MASK; 1067 pgstev |= _PGSTE_GPS_USAGE_STABLE | _PGSTE_GPS_NODAT; 1068 break; 1069 default: 1070 /* we should never get here! */ 1071 break; 1072 } 1073 /* If we are discarding a page, set it to logical zero */ 1074 if (res) 1075 pgstev |= _PGSTE_GPS_ZERO; 1076 1077 pgste_val(pgste) = pgstev; 1078 pgste_set_unlock(ptep, pgste); 1079 pte_unmap_unlock(ptep, ptl); 1080 return res; 1081 } 1082 EXPORT_SYMBOL(pgste_perform_essa); 1083 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org