interconnect: qcom: osm-l3: fix icc_onecell_data allocation

[ Upstream commit f77ebdda0ee652124061c2ac42399bb6c367e729 ]

This is a struct with a trailing zero-length array of icc_node pointers
but it's allocated as if it were a single array of icc_nodes instead.

Fortunately this overallocates memory rather then allocating less memory
than required.

Fix by replacing devm_kcalloc() with devm_kzalloc() and struct_size()
macro.

Fixes: 5bc9900addaf ("interconnect: qcom: Add OSM L3 interconnect provider support")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230105002221.1416479-2-dmitry.baryshkov@linaro.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c
index c7af143980de4d3c7da763f99091c4ae6214d781..87edab1bf987bc1d079df4a6219d5ca3d2f78cd1 100644 (file)
--- a/drivers/interconnect/qcom/osm-l3.c
+++ b/drivers/interconnect/qcom/osm-l3.c
@@ -275,7 +275,7 @@ static int qcom_osm_l3_probe(struct platform_device *pdev)
        qnodes = desc->nodes;
        num_nodes = desc->num_nodes;
 
-       data = devm_kcalloc(&pdev->dev, num_nodes, sizeof(*node), GFP_KERNEL);
+       data = devm_kzalloc(&pdev->dev, struct_size(data, nodes, num_nodes), GFP_KERNEL);
        if (!data)
                return -ENOMEM;