fjes: 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: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index d098b1fcf0067b1c9b09b88fe8671cc6b042b043..185c8a3986816ad02eae84ad8e05b126786d2477 100644 (file)
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -1254,6 +1254,10 @@ static int fjes_probe(struct platform_device *plat_dev)
        adapter->interrupt_watch_enable = false;
 
        res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
+       if (!res) {
+               err = -EINVAL;
+               goto err_free_control_wq;
+       }
        hw->hw_res.start = res->start;
        hw->hw_res.size = resource_size(res);
        hw->hw_res.irq = platform_get_irq(plat_dev, 0);