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qapi: Assert non-input visitors see only valid narrow integers
visit_type_intN() and visit_type_uintN() fail when the value is out of bounds. This is appropriate with an input visitor: the value comes from input, and input may be bad. It should never happen with the other visitors: the value comes from the caller, and callers must keep it within bounds. Assert that. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20200424084338.26803-10-armbru@redhat.com>
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@ -160,10 +160,13 @@ static void visit_type_uintN(Visitor *v, uint64_t *obj, const char *name,
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Error *err = NULL;
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uint64_t value = *obj;
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assert(v->type == VISITOR_INPUT || value <= max);
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v->type_uint64(v, name, &value, &err);
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if (err) {
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error_propagate(errp, err);
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} else if (value > max) {
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assert(v->type == VISITOR_INPUT);
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
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name ? name : "null", type);
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} else {
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@ -219,10 +222,13 @@ static void visit_type_intN(Visitor *v, int64_t *obj, const char *name,
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Error *err = NULL;
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int64_t value = *obj;
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assert(v->type == VISITOR_INPUT || (value >= min && value <= max));
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v->type_int64(v, name, &value, &err);
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if (err) {
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error_propagate(errp, err);
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} else if (value < min || value > max) {
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assert(v->type == VISITOR_INPUT);
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
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name ? name : "null", type);
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} else {
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