commit c844eb46b7d43c2cf760169df5ae1d5b033af338
author Sabrina Dubroca <sd@queasysnail.net> Wed Sep 12 17:44:43 2018 +0200
committer David S. Miller <davem@davemloft.net> Thu Sep 13 12:03:47 2018 -0700
tree 909dc26b18e1ee20e6fcac8936b4bcaa1bfa9eeb
parent 86029d10af18381814881d6cce2dd6872163b59f

tls: clear key material from kernel memory when do_tls_setsockopt_conf fails

Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tls/tls_main.c

diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index 737b386..523622d 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -509,7 +509,7 @@ static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval,
 	goto out;
 
 err_crypto_info:
-	memset(crypto_info, 0, sizeof(*crypto_info));
+	memzero_explicit(crypto_info, sizeof(union tls_crypto_context));
 out:
 	return rc;
 }