[PATCH v5 net-next 04/18] tcp: Don't coalesce decrypted and encrypted SKBs
From: Boris Pismenny <hidden>
Date: 2018-07-13 11:48:21
Subsystem:
networking [general], networking [tcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Neal Cardwell, Linus Torvalds
Prevent coalescing of decrypted and encrypted SKBs in GRO and TCP layer. Signed-off-by: Boris Pismenny <redacted> Signed-off-by: Ilya Lesokhin <redacted> --- net/ipv4/tcp_input.c | 12 ++++++++++++ net/ipv4/tcp_offload.c | 3 +++ 2 files changed, 15 insertions(+)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 814ea43..f89d86a 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c@@ -4343,6 +4343,11 @@ static bool tcp_try_coalesce(struct sock *sk, if (TCP_SKB_CB(from)->seq != TCP_SKB_CB(to)->end_seq) return false; +#ifdef CONFIG_TLS_DEVICE + if (from->decrypted != to->decrypted) + return false; +#endif + if (!skb_try_coalesce(to, from, fragstolen, &delta)) return false;
@@ -4872,6 +4877,9 @@ void tcp_rbtree_insert(struct rb_root *root, struct sk_buff *skb) break; memcpy(nskb->cb, skb->cb, sizeof(skb->cb)); +#ifdef CONFIG_TLS_DEVICE + nskb->decrypted = skb->decrypted; +#endif TCP_SKB_CB(nskb)->seq = TCP_SKB_CB(nskb)->end_seq = start; if (list) __skb_queue_before(list, skb, nskb);
@@ -4899,6 +4907,10 @@ void tcp_rbtree_insert(struct rb_root *root, struct sk_buff *skb) skb == tail || (TCP_SKB_CB(skb)->tcp_flags & (TCPHDR_SYN | TCPHDR_FIN))) goto end; +#ifdef CONFIG_TLS_DEVICE + if (skb->decrypted != nskb->decrypted) + goto end; +#endif } } }
diff --git a/net/ipv4/tcp_offload.c b/net/ipv4/tcp_offload.c
index f5aee64..870b0a3 100644
--- a/net/ipv4/tcp_offload.c
+++ b/net/ipv4/tcp_offload.c@@ -262,6 +262,9 @@ struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb) flush |= (len - 1) >= mss; flush |= (ntohl(th2->seq) + skb_gro_len(p)) ^ ntohl(th->seq); +#ifdef CONFIG_TLS_DEVICE + flush |= p->decrypted ^ skb->decrypted; +#endif if (flush || skb_gro_receive(p, skb)) { mss = 1;
--
1.8.3.1