Messages in this thread Patch in this message | | | From | Aditya Pakki <> | Subject | [PATCH] serial: mvebu-uart: Fix to avoid a potential NULL pointer dereference | Date | Mon, 18 Mar 2019 18:50:56 -0500 |
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of_match_device on failure to find a matching device can return a NULL pointer. The patch checks for such a scenrio and passes the error upstream.
Signed-off-by: Aditya Pakki <pakki001@umn.edu> --- drivers/tty/serial/mvebu-uart.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c index 231f751d1ef4..7e7b1559fa36 100644 --- a/drivers/tty/serial/mvebu-uart.c +++ b/drivers/tty/serial/mvebu-uart.c @@ -810,6 +810,9 @@ static int mvebu_uart_probe(struct platform_device *pdev) return -EINVAL; } + if (!match) + return -ENODEV; + /* Assume that all UART ports have a DT alias or none has */ id = of_alias_get_id(pdev->dev.of_node, "serial"); if (!pdev->dev.of_node || id < 0) -- 2.17.1
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