linux-kernel - [PATCH 1/2] serial: 8250: 8250_omap: Fix possible array out of bounds access

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Date:   Wed, 11 Nov 2020 16:56:52 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Jiri Slaby <jirislaby@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        <linux-serial@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] serial: 8250: 8250_omap: Fix possible array out of bounds access

k3_soc_devices array is missing a sentinel entry which may result in out
of bounds access as reported by kernel KASAN.

Fix this by adding a sentinel entry.

Fixes: 439c7183e5b9 ("serial: 8250: 8250_omap: Disable RX interrupt after DMA enable")
Reported-by: Naresh Kamboju <naresh.kamboju@...aro.org>
Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
---
 drivers/tty/serial/8250/8250_omap.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 084e7bc51f0e..ab18ef035659 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -1199,6 +1199,7 @@ static int omap8250_no_handle_irq(struct uart_port *port)
 static const struct soc_device_attribute k3_soc_devices[] = {
 	{ .family = "AM65X",  },
 	{ .family = "J721E", .revision = "SR1.0" },
+	{ /* sentinel */ }
 };
 
 static struct omap8250_dma_params am654_dma = {
-- 
2.29.2