This is a note to let you know that I've just added the patch titled
gve: Use size_add() in call to struct_size()
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
gve-use-size_add-in-call-to-struct_size.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f8acf67cb89923d708c639d7d68882539dc8d39e
Author: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
Date: Fri Sep 15 12:17:49 2023 -0600
gve: Use size_add() in call to struct_size()
[ 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@xxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
