From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Just before calling unregister_framebuffer with info there is a
null check on info, implying info may possibly zero. Calling
unregister_framebuffer with a null pointer will cause a null
pointer dereference, fix this by moving the call to the block
where info has been null checked.
Detected by CoverityScan, CID#1473969 ("Dereference after null check")
Fixes: 68a958a915ca ("udlfb: handle unplug properly")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
drivers/video/fbdev/udlfb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c
index 070026a7e55a..cf8597f43d7e 100644
--- a/drivers/video/fbdev/udlfb.c
+++ b/drivers/video/fbdev/udlfb.c
@@ -1735,9 +1735,9 @@ static void dlfb_usb_disconnect(struct usb_interface *intf)
for (i = 0; i < ARRAY_SIZE(fb_device_attrs); i++)
device_remove_file(info->dev, &fb_device_attrs[i]);
device_remove_bin_file(info->dev, &edid_attr);
+ unregister_framebuffer(info);
}
- unregister_framebuffer(info);
}
static struct usb_driver dlfb_driver = {
--
2.19.1
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