On (01/19/17 09:36), Paul Durrant wrote: > > Hi Sowmini, > > Sounds like a straightforward bug to me... netfront should be able > to handle an empty skb and clearly, if it's relying on skb_headlen() > being non-zero, that's not the case. > > Paul
I see. Seems like there are 2 things broken here: recovering from skb->len = 0, and recovering from the more complex case of (skb->len > 0 && skb_headlen(skb) == 0) Do you folks want to take a shot at fixing this, since you know the code better? If you are interested, I can share my test program to help you reproduce the simpler skb->len == 0 case, but it's the fully non-linear skbs that may be more interesting to reproduce/fix. I'll probably work on fixing packet_snd to return -EINVAL or similar when the len is zero this week. --Sowmini
