linux-kernel - [PATCH net-next 1/1] net: stmmac: Add check for taprio basetime configuration

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Date:   Thu,  8 Dec 2022 17:03:15 +0800
From:   Lai Peter Jun Ann <jun.ann.lai@...el.com>
To:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc:     netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>,
        Lai Peter Jun Ann <jun.ann.lai@...el.com>
Subject: [PATCH net-next 1/1] net: stmmac: Add check for taprio basetime configuration

From: Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>

Adds a boundary check to prevent negative basetime input from user
while configuring taprio.

Signed-off-by: Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>
Signed-off-by: Lai Peter Jun Ann <jun.ann.lai@...el.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 773e415..2cfb18c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -926,6 +926,9 @@ static int tc_setup_taprio(struct stmmac_priv *priv,
 	int i, ret = 0;
 	u64 ctr;
 
+	if (qopt->base_time < 0)
+		return -ERANGE;
+
 	if (!priv->dma_cap.estsel)
 		return -EOPNOTSUPP;
 
-- 
1.9.1