diff options
| author | Dave Airlie <airlied@redhat.com> | 2017-07-27 08:15:43 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2017-07-27 08:15:43 +1000 |
| commit | 0eb2c0ae578ba00f97c7541e01abbce022d14909 (patch) | |
| tree | 172db28b9232906ddac61b4bf20c4b0c60c85139 /net/ipv4/udp.c | |
| parent | 542aefb5a2da8f67b8fb74a24f60ecb3ec479a06 (diff) | |
| parent | 520eccdfe187591a51ea9ab4c1a024ae4d0f68d9 (diff) | |
Backmerge tag 'v4.13-rc2' into drm-next
Linux 4.13-rc2
This is required for drm-misc fixing.
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 13 |
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) { |