From: Guruswamy Basavaiah <guru2...@gmail.com> Date: Fri, 17 Aug 2018 18:01:41 +0530
> @@ -1860,7 +1860,6 @@ static void mld_send_cr(struct inet6_dev *idev) > struct sk_buff *skb = NULL; > int type, dtype; > > - read_lock_bh(&idev->lock); > spin_lock(&idev->mc_lock); > > /* deleted MCA's */ This will lead to deadlocks, idev->mc_lock must be taken with _bh(). I have zero confidence in this change, did you do any stress testing with lockdep enabled? It would have caught this quickly.
