1 files changed, 5 insertions, 0 deletions
diff --git a/util/qemu-option.c b/util/qemu-option.c
index efe9d279c4..efd6f024e7 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -180,6 +180,11 @@ void parse_option_size(const char *name, const char *value,
 
     if (value != NULL) {
         sizef = strtod(value, &postfix);
+        if (sizef < 0 || sizef > UINT64_MAX) {
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name,
+                             "a non-negative number below 2^64");
+            return;
+        }
         switch (*postfix) {
         case 'T':
             sizef *= 1024;