nft: reset netlink sender buffer size of socket restart

Otherwise, mnl_set_sndbuffer() skips the buffer update after socket
restart. Then, sendmsg() fails with EMSGSIZE later on when sending the
batch to the kernel.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/iptables/nft.c b/iptables/nft.c
index 9a3e9fdf..2c615214 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -794,6 +794,7 @@ static int nft_restart(struct nft_handle *h)
 		return -1;
 
 	h->portid = mnl_socket_get_portid(h->nl);
+	nlbuffsiz = 0;
 
 	return 0;
 }