releases/5.4.270/tls-rx-jump-to-a-more-appropriate-label.patch

From c1198c25292d4bca2ce28a60f827c879408613d1 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Thu, 7 Apr 2022 20:38:14 -0700
Subject: tls: rx: jump to a more appropriate label

From: Jakub Kicinski <kuba@kernel.org>

[ Upstream commit bfc06e1aaa130b86a81ce3c41ec71a2f5e191690 ]

'recv_end:' checks num_async and decrypted, and is then followed
by the 'end' label. Since we know that decrypted and num_async
are 0 at the start we can jump to 'end'.

Move the init of decrypted and num_async to let the compiler
catch if I'm wrong.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: fdfbaec5923d ("tls: stop recv() if initial process_rx_list gave us non-DATA")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/tls/tls_sw.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 38592d0871a3f..606a51237c50f 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1748,6 +1748,7 @@ int tls_sw_recvmsg(struct sock *sk,
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
 	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct sk_psock *psock;
+	int num_async, pending;
 	unsigned char control = 0;
 	ssize_t decrypted = 0;
 	struct strp_msg *rxm;
@@ -1760,8 +1761,6 @@ int tls_sw_recvmsg(struct sock *sk,
 	bool is_kvec = iov_iter_is_kvec(&msg->msg_iter);
 	bool is_peek = flags & MSG_PEEK;
 	bool bpf_strp_enabled;
-	int num_async = 0;
-	int pending;
 
 	flags |= nonblock;
 
@@ -1783,12 +1782,14 @@ int tls_sw_recvmsg(struct sock *sk,
 	}
 
 	if (len <= copied)
-		goto recv_end;
+		goto end;
 
 	target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
 	len = len - copied;
 	timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
 
+	decrypted = 0;
+	num_async = 0;
 	while (len && (decrypted + copied < target || ctx->recv_pkt)) {
 		bool retain_skb = false;
 		bool zc = false;
-- 
2.43.0