From 509b74f3bee772abee994c1f8e3aff22c50cb215 Mon Sep 17 00:00:00 2001 From: Sabrina Dubroca Date: Tue, 16 Jan 2018 16:04:27 +0100 Subject: [PATCH] tls: return -EBUSY if crypto_info is already set do_tls_setsockopt_tx returns 0 without doing anything when crypto_info is already set. Silent failure is confusing for users. Fixes: 3a71956a2d9a ("tls: kernel TLS support") Signed-off-by: Sabrina Dubroca Signed-off-by: David S. Miller --- net/tls/tls_main.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c index 7b7a70e22d909..8e9cbfd214233 100644 --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -367,8 +367,10 @@ static int do_tls_setsockopt_tx(struct sock *sk, char __user *optval, crypto_info = &ctx->crypto_send; /* Currently we don't support set crypto info more than one time */ - if (TLS_CRYPTO_INFO_READY(crypto_info)) + if (TLS_CRYPTO_INFO_READY(crypto_info)) { + rc = -EBUSY; goto out; + } rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); if (rc) { -- 2.39.5