mnl: incomplete extended error reporting for singleton device in chain

Fix error reporting when single device is specifies in chain:

 # nft add chain netdev filter ingress '{ devices = { x }; }'
 add chain netdev filter ingress { devices = { x }; }
                                               ^

Fixes: a66b5ad9540d ("src: allow for updating devices on existing netdev chain")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/mnl.c b/src/mnl.c
index 5dcfd9a0..adc0bd3d 100644
--- a/src/mnl.c
+++ b/src/mnl.c
@@ -790,6 +790,7 @@ static void mnl_nft_chain_devs_build(struct nlmsghdr *nlh, struct cmd *cmd)
 
 	dev_array = nft_dev_array(dev_expr, &num_devs);
 	if (num_devs == 1) {
+		cmd_add_loc(cmd, nlh->nlmsg_len, dev_array[0].location);
 		mnl_attr_put_strz(nlh, NFTA_HOOK_DEV, dev_array[0].ifname);
 	} else {
 		nest_dev = mnl_attr_nest_start(nlh, NFTA_HOOK_DEVS);