linux-kernel - [PATCH 4.18 10/88] tls: clear key material from kernel memory when do_tls_setsockopt

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Date:   Thu, 27 Sep 2018 11:02:51 +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, Sabrina Dubroca <sd@...asysnail.net>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.18 10/88] tls: clear key material from kernel memory when do_tls_setsockopt_conf fails

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sabrina Dubroca <sd@...asysnail.net>

[ Upstream commit c844eb46b7d43c2cf760169df5ae1d5b033af338 ]

Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>
Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/tls/tls_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -502,7 +502,7 @@ static int do_tls_setsockopt_conf(struct
 	goto out;
 
 err_crypto_info:
-	memset(crypto_info, 0, sizeof(*crypto_info));
+	memzero_explicit(crypto_info, sizeof(union tls_crypto_context));
 out:
 	return rc;
 }