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netvsc: unshare skb in VF rx handler

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[ Upstream commit 996ed04741 ]

The netvsc VF skb handler should make sure that skb is not
shared. Similar logic already exists in bonding and team device
drivers.

This is not an issue in practice because the VF devicex
does not send up shared skb's. But the netvsc driver
should do the right thing if it did.

Fixes: 0c195567a8 ("netvsc: transparent VF management")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Stephen Hemminger 2019-05-28 11:47:30 -07:00 • committed by Greg Kroah-Hartman
commit 1c12bf1ebe
1 changed files with 6 additions and 0 deletions
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6
drivers/net/hyperv/netvsc_drv.c
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@ -2004,6 +2004,12 @@ static rx_handler_result_t netvsc_vf_handle_frame(struct sk_buff **pskb)
struct netvsc_vf_pcpu_stats *pcpu_stats
= this_cpu_ptr(ndev_ctx->vf_stats);
skb = skb_share_check(skb, GFP_ATOMIC);
if (unlikely(!skb))
return RX_HANDLER_CONSUMED;
*pskb = skb;
skb->dev = ndev;
u64_stats_update_begin(&pcpu_stats->syncp);