[PATCH net-next] net: restore napi_consume_skb()'s NULL-handling

[Jakub Kicinski <kuba@kernel.org>]

Commit e20dfbad8aab ("net: fix napi_consume_skb() with alien skbs")
added a skb->cpu check to napi_consume_skb(), before the point where
napi_consume_skb() validated skb is not NULL.

Add an explicit check to the early exit condition.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
AI code review reported this on my bnxt patch..
---
 net/core/skbuff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 5a1d123e7ef7..a00808f7be6a 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1490,7 +1490,7 @@ void napi_skb_free_stolen_head(struct sk_buff *skb)
 void napi_consume_skb(struct sk_buff *skb, int budget)
 {
 	/* Zero budget indicate non-NAPI context called us, like netpoll */
-	if (unlikely(!budget)) {
+	if (unlikely(!budget || !skb)) {
 		dev_consume_skb_any(skb);
 		return;
 	}
-- 
2.51.1