| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.17 211/343] mctp: Fix check for dev_hard_header() result | Date | Tue, 12 Apr 2022 08:30:29 +0200 |
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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 05fbd318eb98..d47438f5233d 100644 --- a/net/mctp/route.c +++ b/net/mctp/route.c @@ -507,7 +507,7 @@ 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; } -- 2.35.1
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