From: Cong Wang <xiyou.wangc...@gmail.com>
Date: Tue, 4 Apr 2017 18:51:30 -0700
> Dmitry reported a crash when injecting faults in
> attach_one_default_qdisc() and dev->qdisc is still
> a noop_disc, the check before qdisc_hash_add() fails
> to catch it because it tests NULL. We should test
> against noop_qdisc since it is the default qdisc
> at this point.
>
> Fixes: 59cc1f61f09c ("net: sched: convert qdisc linked list to hashtable")
> Reported-by: Dmitry Vyukov <dvyu...@google.com>
> Cc: Jiri Kosina <jkos...@suse.cz>
> Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
Applied and queued up for -stable.
