linux-kernel - [PATCH 4.19 31/93] net/tls: Fixed return value when tls_complete_pending

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Message-Id: <20190904175305.973059058@linuxfoundation.org>
Date:   Wed,  4 Sep 2019 19:53:33 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vakul Garg <vakul.garg@....com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.19 31/93] net/tls: Fixed return value when tls_complete_pending_work() fails

From: Vakul Garg <vakul.garg@....com>

[ Upstream commit 150085791afb8054e11d2e080d4b9cd755dd7f69 ]

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@....com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 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
@@ -354,7 +354,7 @@ 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);
@@ -370,7 +370,8 @@ 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)) {
@@ -505,7 +506,7 @@ 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;
@@ -525,7 +526,8 @@ 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. */