Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worst scenario, could lead to heap overflows. Also, address the following sparse warnings: drivers/net/ethernet/microsoft/mana/gdma_main.c:677:24: warning: using sizeof on a flexible structure Link: https://github.com/KSPP/linux/issues/174 Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> --- drivers/net/ethernet/microsoft/mana/gdma_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c index 636dfef24a6c..49b85ca578b0 100644 --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c @@ -663,7 +663,7 @@ static int mana_gd_create_dma_region(struct gdma_dev *gd, struct gdma_context *gc = gd->gdma_context; struct hw_channel_context *hwc; u32 length = gmi->length; - u32 req_msg_size; + size_t req_msg_size; int err; int i; @@ -674,7 +674,7 @@ static int mana_gd_create_dma_region(struct gdma_dev *gd, return -EINVAL; hwc = gc->hwc.driver_data; - req_msg_size = sizeof(*req) + num_page * sizeof(u64); + req_msg_size = struct_size(req, page_addr_list, num_page); if (req_msg_size > hwc->max_req_msg_size) return -EINVAL; -- 2.27.0
