The sirf_ports[] array is indexed using a value derived from the
"serialN" alias in DT, which may lead to an out-of-bounds access.
Fix this by adding a range check.
Fixes: 66c7ab1120585d18 ("serial: sirf: Fix out-of-bounds access through DT alias")
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
drivers/tty/serial/sirfsoc_uart.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c
index 9925b00a97772a1b..701df3319ff7579d 100644
--- a/drivers/tty/serial/sirfsoc_uart.c
+++ b/drivers/tty/serial/sirfsoc_uart.c
@@ -1283,6 +1283,11 @@ static int sirfsoc_uart_probe(struct platform_device *pdev)
goto err;
}
sirfport->port.line = of_alias_get_id(np, "serial");
+ if (sirfport->port.line >= SIRFSOC_UART_NR) {
+ dev_err(&pdev->dev, "serial%d out of range\n",
+ sirfport->port.line);
+ return -EINVAL;
+ }
sirf_ports[sirfport->port.line] = sirfport;
sirfport->port.iotype = UPIO_MEM;
sirfport->port.flags = UPF_BOOT_AUTOCONF;
--
2.7.4
