Max310x driver supports up to 4 UART devices but array size of
"struct max310x_one" is set to 1. That leads to out of bounds
access on UART port registration.
This patch fixed it by increase the array size to 4 which is
maximum supported UART.
---
drivers/tty/serial/max310x.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 182549f..b523552 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -33,6 +33,9 @@
#define MAX310X_MAJOR 204
#define MAX310X_MINOR 209
+/* Maximum supported device */
+#define MAX_DEVICE 4
+
/* MAX310X register definitions */
#define MAX310X_RHR_REG (0x00) /* RX FIFO */
#define MAX310X_THR_REG (0x00) /* TX FIFO */
@@ -273,7 +276,7 @@ struct max310x_port {
#ifdef CONFIG_GPIOLIB
struct gpio_chip gpio;
#endif
- struct max310x_one p[0];
+ struct max310x_one p[MAX_DEVICE];
};
static u8 max310x_port_read(struct uart_port *port, u8 reg)
--
1.9.1
--
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