Comment 5 for bug 1201869

Another related fix for this is here:

commit f45a5c267da35174e22cec955093a7513dc1623d
Author: Eric Dumazet <email address hidden>
Date: Fri Feb 8 20:10:49 2013 +0000

    veth: fix NULL dereference in veth_dellink()

    commit d0e2c55e7c940 (veth: avoid a NULL deref in veth_stats_one)
    added another NULL deref in veth_dellink().

    # ip link add name veth1 type veth peer name veth0
    # rmmod veth

    We crash because veth_dellink() is called twice, so we must
    take care of NULL peer.

    Signed-off-by: Eric Dumazet <email address hidden>
    Signed-off-by: David S. Miller <email address hidden>