[PATCH 5.4 02/34] ipv4: fix error return code in rtm_to_fib_config()

[Greg Kroah-Hartman]

From: Zhang Changzhong <zhangchangzhong@xxxxxxxxxx>

[ Upstream commit b410f04eb5b482b5efc4eee90de81ad35d3d923b ]

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: d15662682db2 ("ipv4: Allow ipv6 gateway with ipv4 routes")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Zhang Changzhong <zhangchangzhong@xxxxxxxxxx>
Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
Link: https://lore.kernel.org/r/1607071695-33740-1-git-send-email-zhangchangzhong@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ipv4/fib_frontend.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -835,7 +835,7 @@ static int rtm_to_fib_config(struct net
 	if (has_gw && has_via) {
 		NL_SET_ERR_MSG(extack,
 			       "Nexthop configuration can not contain both GATEWAY and VIA");
-		goto errout;
+		return -EINVAL;
 	}
 
 	return 0;