The serial_pxa_ports[] array is indexed using a value derived from the "serialN" alias in DT, or from platform data, which may lead to an out-of-bounds access. Fix this by adding a range check. Fixes: 699c20f3e6310aa2 ("serial: pxa: add OF support") Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> --- v2: - Fix Fixes reference, - Fix off-by-one error (use ">="), - Update patch description for platform data. --- drivers/tty/serial/pxa.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index baf552944d5686e8..eda3c7710d6a745f 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -885,6 +885,10 @@ static int serial_pxa_probe(struct platform_device *dev) sport->port.line = dev->id; else if (ret < 0) goto err_clk; + if (sport->port.line >= ARRAY_SIZE(serial_pxa_ports)) { + dev_err(&dev->dev, "serial%d out of range\n", sport->port.line); + return -EINVAL; + } snprintf(sport->name, PXA_NAME_LEN - 1, "UART%d", sport->port.line + 1); sport->port.membase = ioremap(mmres->start, resource_size(mmres)); -- 2.7.4