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[PATCH 09/13] qapi: Assert non-input visitors see only valid narrow inte
From: |
Markus Armbruster |
Subject: |
[PATCH 09/13] qapi: Assert non-input visitors see only valid narrow integers |
Date: |
Thu, 23 Apr 2020 18:00:32 +0200 |
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 <address@hidden>
---
qapi/qapi-visit-core.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
index 80ca83bcb9..74aa9c04bd 100644
--- a/qapi/qapi-visit-core.c
+++ b/qapi/qapi-visit-core.c
@@ -160,10 +160,13 @@ static void visit_type_uintN(Visitor *v, uint64_t *obj,
const char *name,
Error *err = NULL;
uint64_t value = *obj;
+ assert(v->type == VISITOR_INPUT || value <= max);
+
v->type_uint64(v, name, &value, &err);
if (err) {
error_propagate(errp, err);
} else if (value > max) {
+ assert(v->type == VISITOR_INPUT);
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", type);
} else {
@@ -219,10 +222,13 @@ static void visit_type_intN(Visitor *v, int64_t *obj,
const char *name,
Error *err = NULL;
int64_t value = *obj;
+ assert(v->type == VISITOR_INPUT || (value >= min && value <= max));
+
v->type_int64(v, name, &value, &err);
if (err) {
error_propagate(errp, err);
} else if (value < min || value > max) {
+ assert(v->type == VISITOR_INPUT);
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", type);
} else {
--
2.21.1
- [PATCH 08/13] qapi: Assert output visitors see only valid enum values, (continued)
- [PATCH 08/13] qapi: Assert output visitors see only valid enum values, Markus Armbruster, 2020/04/23
- [PATCH 13/13] qom: Simplify object_property_get_enum(), Markus Armbruster, 2020/04/23
- [PATCH 11/13] qapi: Assert non-input visitors see only valid alternate tags, Markus Armbruster, 2020/04/23
- [PATCH 05/13] qapi: Polish prose in visitor.h, Markus Armbruster, 2020/04/23
- [PATCH 12/13] qapi: Only input visitors can actually fail, Markus Armbruster, 2020/04/23
- [PATCH 09/13] qapi: Assert non-input visitors see only valid narrow integers,
Markus Armbruster <=
- [PATCH 02/13] qapi: Fix the virtual walk example in visitor.h's big comment, Markus Armbruster, 2020/04/23
- [PATCH 07/13] qapi: Fix Visitor contract for start_alternate(), Markus Armbruster, 2020/04/23