qdev: Change Property::offset field to ptrdiff_t type
Property::offset field is calculated as a diff between two pointers:
arrayprop->prop.offset = eltptr - (void *)dev;
If offset is declared as int, this subtraction can cause type overflow,
thus leading to failure of the subsequent assertion:
assert(qdev_get_prop_ptr(dev, &arrayprop->prop) == eltptr);
So ptrdiff_t should be used instead.
Signed-off-by: Ildar Isaev <ild@inbox.ru>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index e6dbde4..c537969 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -237,7 +237,7 @@
struct Property {
const char *name;
PropertyInfo *info;
- int offset;
+ ptrdiff_t offset;
uint8_t bitnr;
qtype_code qtype;
int64_t defval;
