From: Matt Johnston matt@codeconstruct.com.au
[ Upstream commit 60be976ac45137657b7b505d7e0d44d0e51accb7 ]
dev_hard_header() returns the length of the header, so we need to test for negative errors rather than non-zero.
Fixes: 889b7da23abf ("mctp: Add initial routing framework") Signed-off-by: Matt Johnston matt@codeconstruct.com.au Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/mctp/route.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mctp/route.c b/net/mctp/route.c index f8c0cb2de98b..d1e93b7f67d2 100644 --- a/net/mctp/route.c +++ b/net/mctp/route.c @@ -509,7 +509,7 @@ static int mctp_route_output(struct mctp_route *route, struct sk_buff *skb)
rc = dev_hard_header(skb, skb->dev, ntohs(skb->protocol), daddr, skb->dev->dev_addr, skb->len); - if (rc) { + if (rc < 0) { kfree_skb(skb); return -EHOSTUNREACH; }