From: Vakul Garg <vakul.garg@nxp.com>
Date: Mon, 10 Sep 2018 22:53:46 +0530
Subject: net/tls: Fixed return value when tls_complete_pending_work() fails
Patch-mainline: v4.20-rc1
Git-commit: 150085791afb8054e11d2e080d4b9cd755dd7f69
References: bsc#1109837

In tls_sw_sendmsg() and tls_sw_sendpage(), the variable 'ret' has
been set to return value of tls_complete_pending_work(). This allows
return of proper error code if tls_complete_pending_work() fails.

Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 net/tls/tls_sw.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -489,7 +489,7 @@ int tls_sw_sendmsg(struct sock *sk, stru
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
-	int ret = 0;
+	int ret;
 	int required_size;
 	long timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
 	bool eor = !(msg->msg_flags & MSG_MORE);
@@ -505,7 +505,8 @@ int tls_sw_sendmsg(struct sock *sk, stru
 
 	lock_sock(sk);
 
-	if (tls_complete_pending_work(sk, tls_ctx, msg->msg_flags, &timeo))
+	ret = tls_complete_pending_work(sk, tls_ctx, msg->msg_flags, &timeo);
+	if (ret)
 		goto send_end;
 
 	if (unlikely(msg->msg_controllen)) {
@@ -640,7 +641,7 @@ int tls_sw_sendpage(struct sock *sk, str
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
-	int ret = 0;
+	int ret;
 	long timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
 	bool eor;
 	size_t orig_size = size;
@@ -660,7 +661,8 @@ int tls_sw_sendpage(struct sock *sk, str
 
 	sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk);
 
-	if (tls_complete_pending_work(sk, tls_ctx, flags, &timeo))
+	ret = tls_complete_pending_work(sk, tls_ctx, flags, &timeo);
+	if (ret)
 		goto sendpage_end;
 
 	/* Call the sk_stream functions to manage the sndbuf mem. */