Re: net: use-after-free in neigh_timer_handler/sock_wfree

On Wed, Mar 1, 2017 at 3:09 PM, Cong Wang [off-list ref] wrote:

But I doubt skb_orphan() is the solution here, shouldn't we just
update sk->sk_wmem_alloc with skb->truesize changes?

Is it worth it ? Apart from syszkaller I mean...

We started with something that had a real impact on real workloads.

158f323b9868b59967ad96957c4ca388161be321 net: adjust skb->truesize in
pskb_expand_head()

Note that auditing the stack took me a while.