media: au0828: fix null dereference in error path

au0828_usb_disconnect() gets the au0828_dev struct via usb_get_intfdata,
so it needs to set up for the error paths.

Reported-by: syzbot+357d86bcb4cca1a2f572@syzkaller.appspotmail.com
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c
index 925a804..e306d5d 100644 (file)
--- a/drivers/media/usb/au0828/au0828-core.c
+++ b/drivers/media/usb/au0828/au0828-core.c
@@ -729,6 +729,12 @@ static int au0828_usb_probe(struct usb_interface *interface,
        /* Setup */
        au0828_card_setup(dev);
 
+       /*
+        * Store the pointer to the au0828_dev so it can be accessed in
+        * au0828_usb_disconnect
+        */
+       usb_set_intfdata(interface, dev);
+
        /* Analog TV */
        retval = au0828_analog_register(dev, interface);
        if (retval) {
@@ -747,12 +753,6 @@ static int au0828_usb_probe(struct usb_interface *interface,
        /* Remote controller */
        au0828_rc_register(dev);
 
-       /*
-        * Store the pointer to the au0828_dev so it can be accessed in
-        * au0828_usb_disconnect
-        */
-       usb_set_intfdata(interface, dev);
-
        pr_info("Registered device AU0828 [%s]\n",
                dev->board.name == NULL ? "Unset" : dev->board.name);