tree 6093b79c6b450226d89f1b19c605890725ad149e
parent 21e3113298f97ec95622c0359be62145ffd055c8
author Eric Dumazet <edumazet@google.com> 1494541481 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1496830063 +0200

netem: fix skb_orphan_partial()


[ Upstream commit f6ba8d33cfbb46df569972e64dbb5bb7e929bfd9 ]

I should have known that lowering skb->truesize was dangerous :/

In case packets are not leaving the host via a standard Ethernet device,
but looped back to local sockets, bad things can happen, as reported
by Michael Madsen ( https://bugzilla.kernel.org/show_bug.cgi?id=195713 )

So instead of tweaking skb->truesize, lets change skb->destructor
and keep a reference on the owner socket via its sk_refcnt.

Fixes: f2f872f9272a ("netem: Introduce skb_orphan_partial() helper")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Michael Madsen <mkm@nabto.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>