tun: fix issues of iovec iterators using in tun_put_user()

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This patch fixes two issues after using iovec iterators:
- vlan_offset should be initialized to zero, otherwise unexpected offset
  will be used in skb_copy_datagram_iter()
- advance iovec iterator when vnet_hdr_sz is greater than sizeof(gso), this
  is the case when mergeable rx buffer were enabled for a virt guest.

Fixes e0b46d0ee9 ("tun: Use iovec iterators")
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jason Wang 2014-11-13 16:54:14 +08:00 • committed by David S. Miller

parent 882288c05e

commit 8c847d2541

1 changed files with 3 additions and 1 deletions

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drivers/net/tun.c

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