target-i386: fix "info lapic" segfault on isapc

[mirror_qemu.git] / util / uuid.c

diff --git a/util/uuid.c b/util/uuid.c
index f0c1eeb527bc9f97f02a0b7af07d8e10af72550b..dd6b5fdf058ceab58cbe829f3ddad6b82d7a03a8 100644 (file)
--- a/util/uuid.c
+++ b/util/uuid.c
@@ -61,18 +61,41 @@ char *qemu_uuid_unparse_strdup(const QemuUUID *uuid)
                            uu[13], uu[14], uu[15]);
 }
 
-int qemu_uuid_parse(const char *str, uint8_t *uuid)
+static bool qemu_uuid_is_valid(const char *str)
 {
+    int i;
+
+    for (i = 0; i < strlen(str); i++) {
+        const char c = str[i];
+        if (i == 8 || i == 13 || i == 18 || i == 23) {
+            if (str[i] != '-') {
+                return false;
+            }
+        } else {
+            if ((c >= '0' && c <= '9') ||
+                (c >= 'A' && c <= 'F') ||
+                (c >= 'a' && c <= 'f')) {
+                continue;
+            }
+            return false;
+        }
+    }
+    return i == 36;
+}
+
+int qemu_uuid_parse(const char *str, QemuUUID *uuid)
+{
+    unsigned char *uu = &uuid->data[0];
     int ret;
 
-    if (strlen(str) != 36) {
+    if (!qemu_uuid_is_valid(str)) {
         return -1;
     }
 
-    ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
-                 &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
-                 &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
-                 &uuid[15]);
+    ret = sscanf(str, UUID_FMT, &uu[0], &uu[1], &uu[2], &uu[3],
+                 &uu[4], &uu[5], &uu[6], &uu[7], &uu[8], &uu[9],
+                 &uu[10], &uu[11], &uu[12], &uu[13], &uu[14],
+                 &uu[15]);
 
     if (ret != 16) {
         return -1;