5.10-stable review patch. If anyone has any objections, please let me know.
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From: Gustavo A. R. Silva gustavoars@kernel.org
[ Upstream commit d692873cbe861a870cdc9cbfb120eefd113c3dfd ]
If, for any reason, `tx_stats_num + rx_stats_num` wraps around, the protection that struct_size() adds against potential integer overflows is defeated. Fix this by hardening call to struct_size() with size_add().
Fixes: 691f4077d560 ("gve: Replace zero-length array with flexible-array member") Signed-off-by: Gustavo A. R. Silva gustavoars@kernel.org Reviewed-by: Kees Cook keescook@chromium.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/google/gve/gve_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index f0c1e6c80b61c..b76d1d019a81d 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -128,7 +128,7 @@ static int gve_alloc_stats_report(struct gve_priv *priv) rx_stats_num = (GVE_RX_STATS_REPORT_NUM + NIC_RX_STATS_REPORT_NUM) * priv->rx_cfg.num_queues; priv->stats_report_len = struct_size(priv->stats_report, stats, - tx_stats_num + rx_stats_num); + size_add(tx_stats_num, rx_stats_num)); priv->stats_report = dma_alloc_coherent(&priv->pdev->dev, priv->stats_report_len, &priv->stats_report_bus, GFP_KERNEL);