[PATCH 5.9 288/757] net: dsa: rtl8366: Check validity of passed VLANs

[Greg Kroah-Hartman]

From: Linus Walleij <linus.walleij@xxxxxxxxxx>

[ Upstream commit 6641a2c42b0a307b7638d10e5d4b90debc61389d ]

The rtl8366_set_vlan() and rtl8366_set_pvid() get invalid
VLANs tossed at it, especially VLAN0, something the hardware
and driver cannot handle. Check validity and bail out like
we do in the other callbacks.

Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/dsa/rtl8366.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/dsa/rtl8366.c b/drivers/net/dsa/rtl8366.c
index a8c5a934c3d30..f75a660fcb620 100644
--- a/drivers/net/dsa/rtl8366.c
+++ b/drivers/net/dsa/rtl8366.c
@@ -43,6 +43,9 @@ int rtl8366_set_vlan(struct realtek_smi *smi, int vid, u32 member,
 	int ret;
 	int i;
 
+	if (!smi->ops->is_vlan_valid(smi, vid))
+		return -EINVAL;
+
 	dev_dbg(smi->dev,
 		"setting VLAN%d 4k members: 0x%02x, untagged: 0x%02x\n",
 		vid, member, untag);
@@ -118,6 +121,9 @@ int rtl8366_set_pvid(struct realtek_smi *smi, unsigned int port,
 	int ret;
 	int i;
 
+	if (!smi->ops->is_vlan_valid(smi, vid))
+		return -EINVAL;
+
 	/* Try to find an existing MC entry for this VID */
 	for (i = 0; i < smi->num_vlan_mc; i++) {
 		ret = smi->ops->get_vlan_mc(smi, i, &vlanmc);
-- 
2.25.1