[PATCH 5.4 20/34] USB: dummy-hcd: Fix uninitialized array use in init()

[Greg Kroah-Hartman]

From: Bui Quang Minh <minhquangbu...@gmail.com>

commit e90cfa813da7a527785033a0b247594c2de93dd8 upstream.

This error path

        err_add_pdata:
                for (i = 0; i < mod_data.num; i++)
                        kfree(dum[i]);

can be triggered when not all dum's elements are initialized.

Fix this by initializing all dum's elements to NULL.

Acked-by: Alan Stern <st...@rowland.harvard.edu>
Cc: stable <sta...@vger.kernel.org>
Signed-off-by: Bui Quang Minh <minhquangbu...@gmail.com>
Link: 
https://lore.kernel.org/r/1607063090-3426-1-git-send-email-minhquangbu...@gmail.com
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/usb/gadget/udc/dummy_hcd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -2733,7 +2733,7 @@ static int __init init(void)
 {
        int     retval = -ENOMEM;
        int     i;
-       struct  dummy *dum[MAX_NUM_UDC];
+       struct  dummy *dum[MAX_NUM_UDC] = {};
 
        if (usb_disabled())
                return -ENODEV;