From: Stephen Hemminger stephen@networkplumber.org
[ Upstream commit 996ed04741467f6d1552440c92988b132a9487ec ]
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: 0c195567a8f6 ("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 --- drivers/net/hyperv/netvsc_drv.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 1f9f7fcdb0eb..54670c9905c7 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -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);