Messages in this thread Patch in this message | | | Date | Thu, 29 Aug 2019 13:17:21 -0500 | From | "Gustavo A. R. Silva" <> | Subject | [PATCH] rpmsg: glink: Use struct_size() helper |
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One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example:
struct { ... struct intent_pair intents[]; } __packed * msg;
Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes.
So, replace the following form:
sizeof(*msg) + sizeof(struct intent_pair) * count
with:
struct_size(msg, intents, count)
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- drivers/rpmsg/qcom_glink_native.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index f46c787733e8..621f1afd4d6b 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -892,7 +892,7 @@ static void qcom_glink_handle_intent(struct qcom_glink *glink, struct intent_pair intents[]; } __packed * msg; - const size_t msglen = sizeof(*msg) + sizeof(struct intent_pair) * count; + const size_t msglen = struct_size(msg, intents, count); int ret; int i; unsigned long flags; -- 2.23.0
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