Jeff,
   I have submitte a fix for the same on linux-usb and netdev mailing
list. Just waiting for review.
Please review the same.

http://www.spinics.net/lists/netdev/msg358605.html


Cheers,
Pavi

On Mon, Jan 4, 2016 at 11:36 PM, Jeff Haran [off-list ref] wrote:

quoted

-----Original Message-----
From: kernelnewbies-bounces at kernelnewbies.org [mailto:kernelnewbies-
bounces at kernelnewbies.org] On Behalf Of pavi1729
Sent: Monday, December 28, 2015 6:16 AM
To: kernelnewbies at kernelnewbies.org
Subject: skb_clone related query

Hi,
  Just out of curisity, I was looking at Kernel 3.14, skb_clone function in
f_ncm.c

http://lxr.free-
electrons.com/source/drivers/usb/gadget/f_ncm.c?v=3.14#L1063


QUERY : Shouldn't a kfree_skb(skb2); happen before goto err @1070 ?
              Is this not a memleak ?


1068           if (!skb_pull(skb2, index)) {
1069                         ret = -EOVERFLOW;
1070                         goto err;
1071           }


Thanks,
Pavi

Looks like an skb leak to me. Though the fix would need to consider the case where skb2 was set equal to skb at line 1061 instead of being cloned.

Jeff Haran