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authorWillem de Bruijn <willemb@google.com>2017-09-23 02:42:37 +0300
committerDavid S. Miller <davem@davemloft.net>2017-09-23 06:31:29 +0300
commit581fe0ea61584d88072527ae9fb9dcb9d1f2783e (patch)
tree3e4d6f6ea3397283ab12445eb369ebb5ee4c006b /net
parentb9b95da92de9d498ece7e6a82e2d6dcfc76fd9d8 (diff)
downloadlinux-581fe0ea61584d88072527ae9fb9dcb9d1f2783e.tar.xz
net: orphan frags on stand-alone ptype in dev_queue_xmit_nit
Zerocopy skbs frags are copied when the skb is looped to a local sock. Commit 1080e512d44d ("net: orphan frags on receive") introduced calls to skb_orphan_frags to deliver_skb and __netif_receive_skb for this. With msg_zerocopy, these skbs can also exist in the tx path and thus loop from dev_queue_xmit_nit. This already calls deliver_skb in its loop. But it does not orphan before a separate pt_prev->func(). Add the missing skb_orphan_frags_rx. Changes v1->v2: handle skb_orphan_frags_rx failure Fixes: 1f8b977ab32d ("sock: enable MSG_ZEROCOPY") Signed-off-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 9a2254f9802f..588b473194a8 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1948,8 +1948,12 @@ again:
goto again;
}
out_unlock:
- if (pt_prev)
- pt_prev->func(skb2, skb->dev, pt_prev, skb->dev);
+ if (pt_prev) {
+ if (!skb_orphan_frags_rx(skb2, GFP_ATOMIC))
+ pt_prev->func(skb2, skb->dev, pt_prev, skb->dev);
+ else
+ kfree_skb(skb2);
+ }
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(dev_queue_xmit_nit);