[PATCH 1/9] net/gve: clear out shared memory region for stats report

[Joshua Washington]

The stats report memzone is allocated from hugepage memory which could
possibly have had sensitive data from a previous DPDK invocation.

Clear out the buffer before sharing the memory region with the virtual
device to protect guest memory.

Fixes: 458b53dec01e ("net/gve: enable imissed stats for GQ format")
Cc: stable at dpdk.org
Signed-off-by: Joshua Washington <joshwash at google.com>
Reviewed-by: Mark Blasko <blasko at google.com>
---
 drivers/net/gve/gve_ethdev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/gve/gve_ethdev.c b/drivers/net/gve/gve_ethdev.c
index 0b02dcb3ad..f73784a109 100644
--- a/drivers/net/gve/gve_ethdev.c
+++ b/drivers/net/gve/gve_ethdev.c
@@ -306,6 +306,8 @@ gve_alloc_stats_report(struct gve_priv *priv,
 	if (!priv->stats_report_mem)
 		return -ENOMEM;
 
+	memset(priv->stats_report_mem->addr, 0, priv->stats_report_mem->len);
+
 	/* offset by skipping stats written by gve. */
 	priv->stats_start_idx = (GVE_TX_STATS_REPORT_NUM * nb_tx_queues) +
 		(GVE_RX_STATS_REPORT_NUM * nb_rx_queues);
-- 
2.55.0.rc0.799.gd6f94ed593-goog