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-rw-r--r--lib/string.c141
1 files changed, 0 insertions, 141 deletions
diff --git a/lib/string.c b/lib/string.c
index 5e8d410a93df..64a9e33f1daa 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -1052,144 +1052,3 @@ void fortify_panic(const char *name)
1052 BUG(); 1052 BUG();
1053} 1053}
1054EXPORT_SYMBOL(fortify_panic); 1054EXPORT_SYMBOL(fortify_panic);
1055
1056#ifdef CONFIG_STRING_SELFTEST
1057#include <linux/slab.h>
1058#include <linux/module.h>
1059
1060static __init int memset16_selftest(void)
1061{
1062 unsigned i, j, k;
1063 u16 v, *p;
1064
1065 p = kmalloc(256 * 2 * 2, GFP_KERNEL);
1066 if (!p)
1067 return -1;
1068
1069 for (i = 0; i < 256; i++) {
1070 for (j = 0; j < 256; j++) {
1071 memset(p, 0xa1, 256 * 2 * sizeof(v));
1072 memset16(p + i, 0xb1b2, j);
1073 for (k = 0; k < 512; k++) {
1074 v = p[k];
1075 if (k < i) {
1076 if (v != 0xa1a1)
1077 goto fail;
1078 } else if (k < i + j) {
1079 if (v != 0xb1b2)
1080 goto fail;
1081 } else {
1082 if (v != 0xa1a1)
1083 goto fail;
1084 }
1085 }
1086 }
1087 }
1088
1089fail:
1090 kfree(p);
1091 if (i < 256)
1092 return (i << 24) | (j << 16) | k;
1093 return 0;
1094}
1095
1096static __init int memset32_selftest(void)
1097{
1098 unsigned i, j, k;
1099 u32 v, *p;
1100
1101 p = kmalloc(256 * 2 * 4, GFP_KERNEL);
1102 if (!p)
1103 return -1;
1104
1105 for (i = 0; i < 256; i++) {
1106 for (j = 0; j < 256; j++) {
1107 memset(p, 0xa1, 256 * 2 * sizeof(v));
1108 memset32(p + i, 0xb1b2b3b4, j);
1109 for (k = 0; k < 512; k++) {
1110 v = p[k];
1111 if (k < i) {
1112 if (v != 0xa1a1a1a1)
1113 goto fail;
1114 } else if (k < i + j) {
1115 if (v != 0xb1b2b3b4)
1116 goto fail;
1117 } else {
1118 if (v != 0xa1a1a1a1)
1119 goto fail;
1120 }
1121 }
1122 }
1123 }
1124
1125fail:
1126 kfree(p);
1127 if (i < 256)
1128 return (i << 24) | (j << 16) | k;
1129 return 0;
1130}
1131
1132static __init int memset64_selftest(void)
1133{
1134 unsigned i, j, k;
1135 u64 v, *p;
1136
1137 p = kmalloc(256 * 2 * 8, GFP_KERNEL);
1138 if (!p)
1139 return -1;
1140
1141 for (i = 0; i < 256; i++) {
1142 for (j = 0; j < 256; j++) {
1143 memset(p, 0xa1, 256 * 2 * sizeof(v));
1144 memset64(p + i, 0xb1b2b3b4b5b6b7b8ULL, j);
1145 for (k = 0; k < 512; k++) {
1146 v = p[k];
1147 if (k < i) {
1148 if (v != 0xa1a1a1a1a1a1a1a1ULL)
1149 goto fail;
1150 } else if (k < i + j) {
1151 if (v != 0xb1b2b3b4b5b6b7b8ULL)
1152 goto fail;
1153 } else {
1154 if (v != 0xa1a1a1a1a1a1a1a1ULL)
1155 goto fail;
1156 }
1157 }
1158 }
1159 }
1160
1161fail:
1162 kfree(p);
1163 if (i < 256)
1164 return (i << 24) | (j << 16) | k;
1165 return 0;
1166}
1167
1168static __init int string_selftest_init(void)
1169{
1170 int test, subtest;
1171
1172 test = 1;
1173 subtest = memset16_selftest();
1174 if (subtest)
1175 goto fail;
1176
1177 test = 2;
1178 subtest = memset32_selftest();
1179 if (subtest)
1180 goto fail;
1181
1182 test = 3;
1183 subtest = memset64_selftest();
1184 if (subtest)
1185 goto fail;
1186
1187 pr_info("String selftests succeeded\n");
1188 return 0;
1189fail:
1190 pr_crit("String selftest failure %d.%08x\n", test, subtest);
1191 return 0;
1192}
1193
1194module_init(string_selftest_init);
1195#endif /* CONFIG_STRING_SELFTEST */