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From: Kory Maincent <kory.maincent@bootlin.com>
To: Andrew Lunn <andrew@lunn.ch>, Jakub Kicinski <kuba@kernel.org>,
	"Kory Maincent (Dent Project)" <kory.maincent@bootlin.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Kyle Swenson <kyle.swenson@est.tech>,
	thomas.petazzoni@bootlin.com,
	Oleksij Rempel <o.rempel@pengutronix.de>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Paolo Abeni <pabeni@redhat.com>
Subject: [PATCH net] net: pse-pd: Fix out of bound for loop
Date: Tue, 15 Oct 2024 15:02:54 +0200	[thread overview]
Message-ID: <20241015130255.125508-1-kory.maincent@bootlin.com> (raw)

Adjust the loop limit to prevent out-of-bounds access when iterating over
PI structures. The loop should not reach the index pcdev->nr_lines since
we allocate exactly pcdev->nr_lines number of PI structures. This fix
ensures proper bounds are maintained during iterations.

Fixes: 9be9567a7c59 ("net: pse-pd: Add support for PSE PIs")
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
---
 drivers/net/pse-pd/pse_core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/pse-pd/pse_core.c b/drivers/net/pse-pd/pse_core.c
index f8e6854781e6..2906ce173f66 100644
--- a/drivers/net/pse-pd/pse_core.c
+++ b/drivers/net/pse-pd/pse_core.c
@@ -113,7 +113,7 @@ static void pse_release_pis(struct pse_controller_dev *pcdev)
 {
 	int i;
 
-	for (i = 0; i <= pcdev->nr_lines; i++) {
+	for (i = 0; i < pcdev->nr_lines; i++) {
 		of_node_put(pcdev->pi[i].pairset[0].np);
 		of_node_put(pcdev->pi[i].pairset[1].np);
 		of_node_put(pcdev->pi[i].np);
@@ -647,7 +647,7 @@ static int of_pse_match_pi(struct pse_controller_dev *pcdev,
 {
 	int i;
 
-	for (i = 0; i <= pcdev->nr_lines; i++) {
+	for (i = 0; i < pcdev->nr_lines; i++) {
 		if (pcdev->pi[i].np == np)
 			return i;
 	}
-- 
2.34.1


             reply	other threads:[~2024-10-15 13:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-15 13:02 Kory Maincent [this message]
2024-10-15 13:28 ` Simon Horman
2024-10-15 14:06 ` Oleksij Rempel
2024-10-20 14:50 ` patchwork-bot+netdevbpf

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