From:   Hangyu Hua <hbh25y@gmail.com>
To:     borisp@nvidia.com, john.fastabend@gmail.com, kuba@kernel.org,
        davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
        ilyal@mellanox.com, aviadye@mellanox.com, sd@queasysnail.net
Cc:     netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        Hangyu Hua <hbh25y@gmail.com>
Subject: [PATCH v2] net: tls: fix possible info leak in tls_set_device_offload()
Date:   Fri, 24 Feb 2023 18:28:39 +0800
Message-Id: <20230224102839.26538-1-hbh25y@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

After tls_set_device_offload() fails, we enter tls_set_sw_offload(). But
tls_set_sw_offload can't set cctx->iv and cctx->rec_seq to NULL if it fails
before kmalloc cctx->iv. It is better to Set them to NULL to avoid any
potential info leak.

Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
---

	v2: change commit log. The original issue will be fixed in another patch.

 net/tls/tls_device.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 6c593788dc25..a63f6f727f58 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -1241,8 +1241,10 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 	kfree(start_marker_record);
 free_rec_seq:
 	kfree(ctx->tx.rec_seq);
+	ctx->tx.rec_seq = NULL;
 free_iv:
 	kfree(ctx->tx.iv);
+	ctx->tx.iv = NULL;
 release_netdev:
 	dev_put(netdev);
 	return rc;
-- 
2.34.1