skb_release_head_state() inlines skb_orphan().

We need to clear skb->sk otherwise we can freeze TCP flows
on a mostly idle host, because skb_fclone_busy() would
return true as long as the packet is not yet processed by
skb_defer_free_flush().

Fixes: 1fcf572211da ("net: allow skb_release_head_state() to be called multiple times")
Fixes: e20dfbad8aab ("net: fix napi_consume_skb() with alien skbs")
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 net/core/skbuff.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 4f4d7ab7057f16bcf88f29827a45a9f4a8f43d5c..f34372666e67cee5329d3ba1d3c86f8622facac3 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1152,6 +1152,7 @@ void skb_release_head_state(struct sk_buff *skb)
 
 #endif
 		skb->destructor = NULL;
+		skb->sk = NULL;
 	}
 	nf_reset_ct(skb);
 	skb_ext_reset(skb);
-- 
2.52.0.rc1.455.g30608eb744-goog