[PATCH 4.18 10/88] tls: clear key material from kernel memory when do_tls_setsockopt_conf fails

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

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

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

From: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>

[ Upstream commit c844eb46b7d43c2cf760169df5ae1d5b033af338 ]

Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Signed-off-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 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;
 }