[PATCH v3 2/2] net: pcs: rzn1-miic: Verify port number from dtb

[Kyle Hendry via B4 Relay]

From: Kyle Hendry <khendry@xxxxxxxxxxxxxxxxxxxx>

Add check to make sure port number is in range before writing
to dt_val array

Signed-off-by: Kyle Hendry <khendry@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/net/pcs/pcs-rzn1-miic.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/pcs/pcs-rzn1-miic.c b/drivers/net/pcs/pcs-rzn1-miic.c
index c50b65d064fa..3ee40eb9d545 100644
--- a/drivers/net/pcs/pcs-rzn1-miic.c
+++ b/drivers/net/pcs/pcs-rzn1-miic.c
@@ -692,6 +692,12 @@ static int miic_parse_dt(struct miic *miic, u32 *mode_cfg)
 		if (of_property_read_u32(conv, "reg", &port))
 			continue;
 
+		if (port < miic->of_data->miic_port_start || port > miic->of_data->miic_port_max) {
+			dev_err(miic->dev, "Port number out of range: %d\n", port);
+			kfree(dt_val);
+			return -EINVAL;
+		}
+
 		if (of_property_read_u32(conv, "renesas,miic-input", &conf))
 			continue;
 

-- 
2.43.0