mtd: rawnand: tmio: check return value after calling platform_get_resource()

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220426084913.4021868-3-yangyingliang@huawei.com

diff --git a/drivers/mtd/nand/raw/tmio_nand.c b/drivers/mtd/nand/raw/tmio_nand.c
index de8e919d0ebe647ab39f474f01e445c303b0c051..8f1a42bf199c7ebc166e90b498d228cf14606e98 100644 (file)
--- a/drivers/mtd/nand/raw/tmio_nand.c
+++ b/drivers/mtd/nand/raw/tmio_nand.c
@@ -390,6 +390,9 @@ static int tmio_probe(struct platform_device *dev)
        if (data == NULL)
                dev_warn(&dev->dev, "NULL platform data!\n");
 
+       if (!ccr || !fcr)
+               return -EINVAL;
+
        tmio = devm_kzalloc(&dev->dev, sizeof(*tmio), GFP_KERNEL);
        if (!tmio)
                return -ENOMEM;