From: Vakul Garg <vakul.garg@nxp.com>
Date: Tue, 25 Sep 2018 20:21:51 +0530
Subject: tls: Fixed a memory leak during socket close
Patch-mainline: v4.20-rc1
Git-commit: c774973e91e1f08c58bb25c950a30252cfde650c
References: bsc#1109837

During socket close, if there is a open record with tx context, it needs
to be be freed apart from freeing up plaintext and encrypted scatter
lists. This patch frees up the open record if present in tx context.

Also tls_free_both_sg() has been renamed to tls_free_open_rec() to
indicate that the free record in tx context is being freed inside the
function.

Fixes: a42055e8d2c3 ("net/tls: Add support for async encryption")
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 |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -310,7 +310,7 @@ static void free_sg(struct sock *sk, str
 	*sg_size = 0;
 }
 
-static void tls_free_both_sg(struct sock *sk)
+static void tls_free_open_rec(struct sock *sk)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
@@ -327,6 +327,8 @@ static void tls_free_both_sg(struct sock
 	free_sg(sk, rec->sg_plaintext_data,
 		&rec->sg_plaintext_num_elem,
 		&rec->sg_plaintext_size);
+
+	kfree(rec);
 }
 
 int tls_tx_records(struct sock *sk, int flags)
@@ -1588,7 +1590,7 @@ void tls_sw_free_resources_tx(struct soc
 	}
 
 	crypto_free_aead(ctx->aead_send);
-	tls_free_both_sg(sk);
+	tls_free_open_rec(sk);
 
 	kfree(ctx);
 }