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Diffstat (limited to 'net/ipv4/udp.c')
-rw-r--r--net/ipv4/udp.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 25294d43e147..b057653ceca9 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1388,6 +1388,11 @@ void skb_consume_udp(struct sock *sk, struct sk_buff *skb, int len)
unlock_sock_fast(sk, slow);
}
+ /* we cleared the head states previously only if the skb lacks any IP
+ * options, see __udp_queue_rcv_skb().
+ */
+ if (unlikely(IPCB(skb)->opt.optlen > 0))
+ skb_release_head_state(skb);
consume_stateless_skb(skb);
}
EXPORT_SYMBOL_GPL(skb_consume_udp);
@@ -1779,8 +1784,12 @@ static int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
sk_mark_napi_id_once(sk, skb);
}
- /* clear all pending head states while they are hot in the cache */
- skb_release_head_state(skb);
+ /* At recvmsg() time we need skb->dst to process IP options-related
+ * cmsg, elsewhere can we clear all pending head states while they are
+ * hot in the cache
+ */
+ if (likely(IPCB(skb)->opt.optlen == 0))
+ skb_release_head_state(skb);
rc = __udp_enqueue_schedule_skb(sk, skb);
if (rc < 0) {