[PATCH net-next 1/3] net: selftests: use skb_share_check() in the loopback receive hook

[Nicolai Buchwitz]

The loopback hook gets a shared skb when another ETH_P_IP handler is
bound to the device. skb_unshare() does not unshare it, so
skb_linearize() on a non-linear frame hits BUG_ON(skb_shared()).

Use skb_share_check() instead.

Fixes: 3e1e58d64c3d ("net: add generic selftest support")
Signed-off-by: Nicolai Buchwitz <nb@xxxxxxxxxxx>
---
 net/core/selftests.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/selftests.c b/net/core/selftests.c
index 36b949ae520b..80029a67b2d2 100644
--- a/net/core/selftests.c
+++ b/net/core/selftests.c
@@ -170,7 +170,7 @@ static int net_test_loopback_validate(struct sk_buff *skb,
 	struct tcphdr *thdr;
 	struct iphdr *ihdr;
 
-	skb = skb_unshare(skb, GFP_ATOMIC);
+	skb = skb_share_check(skb, GFP_ATOMIC);
 	if (!skb)
 		goto out;
 

-- 
2.53.0