| Message ID | 1519393117-31998-7-git-send-email-geert+renesas@glider.be (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index f9fecc5ed0cee826..3f2f8c118ce09d56 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1818,6 +1818,10 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) dbg("s3c24xx_serial_probe(%p) %d\n", pdev, index); + if (index >= ARRAY_SIZE(s3c24xx_serial_ports)) { + dev_err(&pdev->dev, "serial%d out of range\n", index); + return -EINVAL; + } ourport = &s3c24xx_serial_ports[index]; ourport->drv_data = s3c24xx_get_driver_data(pdev);
The s3c24xx_serial_ports[] array is indexed using a value derived from the "serialN" alias in DT, or from an incrementing probe index, which may lead to an out-of-bounds access. Fix this by adding a range check. Note that the array size is defined by a Kconfig symbol (CONFIG_SERIAL_SAMSUNG_UARTS), so this can even be triggered using a legitimate DTB or legitimate board code. Fixes: 13a9f6c64fdc55eb ("serial: samsung: Consider DT alias when probing ports") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- v2: - Fix Fixes reference, - Use ARRAY_SIZE(), - Update patch description for non-DT case. --- drivers/tty/serial/samsung.c | 4 ++++ 1 file changed, 4 insertions(+)