netdev - [PATCH net-next 10/11] nfp: tls: undo TLS sequence tracking when dropping the frame

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190709025318.5534-11-jakub.kicinski@netronome.com>
Date:   Mon,  8 Jul 2019 19:53:17 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        alexei.starovoitov@...il.com,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Dirk van der Merwe <dirk.vandermerwe@...ronome.com>
Subject: [PATCH net-next 10/11] nfp: tls: undo TLS sequence tracking when dropping the frame

If driver has to drop the TLS frame it needs to undo the TCP
sequence tracking changes, otherwise device will receive
segments out of order and drop them.

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@...ronome.com>
---
 .../ethernet/netronome/nfp/nfp_net_common.c   | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 54dd98b2d645..9903805717da 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -893,6 +893,28 @@ nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
 	return skb;
 }
 
+static void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle)
+{
+#ifdef CONFIG_TLS_DEVICE
+	struct nfp_net_tls_offload_ctx *ntls;
+	u32 datalen, seq;
+
+	if (!tls_handle)
+		return;
+	if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)))
+		return;
+
+	datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
+	seq = ntohl(tcp_hdr(skb)->seq);
+
+	ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
+	if (ntls->next_seq == seq + datalen)
+		ntls->next_seq = seq;
+	else
+		WARN_ON_ONCE(1);
+#endif
+}
+
 static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring)
 {
 	wmb();
@@ -1102,6 +1124,7 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
 	u64_stats_update_begin(&r_vec->tx_sync);
 	r_vec->tx_errors++;
 	u64_stats_update_end(&r_vec->tx_sync);
+	nfp_net_tls_tx_undo(skb, tls_handle);
 	dev_kfree_skb_any(skb);
 	return NETDEV_TX_OK;
 }
-- 
2.21.0