efifb: exit if framebuffer address is invalid

[mirror_ubuntu-bionic-kernel.git] / drivers / video / efifb.c

diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c
index 0c5b9a9fd56f178cf0ad10bed907138a2b06fe3c..8dea2bc927054783658183f662d9644e2eb27efc 100644 (file)
--- a/drivers/video/efifb.c
+++ b/drivers/video/efifb.c
@@ -210,12 +210,15 @@ static int __init efifb_probe(struct platform_device *dev)
        unsigned int size_total;
        int request_succeeded = 0;
 
-       printk(KERN_INFO "efifb: probing for efifb\n");
-
        if (!screen_info.lfb_depth)
                screen_info.lfb_depth = 32;
        if (!screen_info.pages)
                screen_info.pages = 1;
+       if (!screen_info.lfb_base) {
+               printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
+               return -ENODEV;
+       }
+       printk(KERN_INFO "efifb: probing for efifb\n");
 
        /* just assume they're all unset if any are */
        if (!screen_info.blue_size) {