[PATCH 6.1 033/379] gve: Use size_add() in call to struct_size()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>

[ 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>
---
 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 2e5e0a8872704..d3f6ad586ba1b 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c
@@ -139,7 +139,7 @@ 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);
-- 
2.42.0






[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux