From: Hui Wang <hui.wang@canonical.com>
Date: Fri, 27 Sep 2024 11:46:10 +0000 (+0800)
Subject: net: phy: realtek: Check the index value in led_hw_control_get
X-Git-Tag: v6.12~263^2~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c283782fc5d60c4d8169137c6f955aa3553d3b3d;p=platform%2Fkernel%2Flinux-amlogic.git

net: phy: realtek: Check the index value in led_hw_control_get

Just like rtl8211f_led_hw_is_supported() and
rtl8211f_led_hw_control_set(), the rtl8211f_led_hw_control_get() also
needs to check the index value, otherwise the caller is likely to get
an incorrect rules.

Fixes: 17784801d888 ("net: phy: realtek: Add support for PHY LEDs on RTL8211F")
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Link: https://patch.msgid.link/20240927114610.1278935-1-hui.wang@canonical.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 25e5bfbb6f89..c15d2f66ef0d 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -527,6 +527,9 @@ static int rtl8211f_led_hw_control_get(struct phy_device *phydev, u8 index,
 {
 	int val;
 
+	if (index >= RTL8211F_LED_COUNT)
+		return -EINVAL;
+
 	val = phy_read_paged(phydev, 0xd04, RTL8211F_LEDCR);
 	if (val < 0)
 		return val;