From 376c7311bdb6efea3322310333576a04d73fbe4c Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 1 Aug 2013 11:43:08 -0700 Subject: [PATCH] net: add a temporary sanity check in skb_orphan() David suggested to add a BUG_ON() to catch if some layer sets skb->sk pointer without a corresponding destructor. As skb can sit in a queue, it's mandatory to make sure the socket cannot disappear, and it's usually done by taking a reference on the socket, then releasing it from the skb destructor. This patch is a follow-up to commit c34a761231b5 ("net: skb_orphan() changes") and will be reverted after catching all possible offenders if any. Suggested-by: David Miller Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/skbuff.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index a95547adff25..d48de687c21f 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1809,6 +1809,8 @@ static inline void skb_orphan(struct sk_buff *skb) skb->destructor(skb); skb->destructor = NULL; skb->sk = NULL; + } else { + BUG_ON(skb->sk); } } -- 2.20.1