[RFC PATCH 4/6] hv_sock: Initialize send_buf in hvs_stream_enqueue()

From: "Andrea Parri (Microsoft)" <parri.andrea@gmail.com>
To: KY Srinivasan <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
	Michael Kelley <mikelley@microsoft.com>,
	Stefano Garzarella <sgarzare@redhat.com>,
	David Miller <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: linux-hyperv@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Andrea Parri (Microsoft)" <parri.andrea@gmail.com>
Subject: [RFC PATCH 4/6] hv_sock: Initialize send_buf in hvs_stream_enqueue()
Date: Wed, 13 Apr 2022 22:47:40 +0200	[thread overview]
Message-ID: <20220413204742.5539-5-parri.andrea@gmail.com> (raw)
In-Reply-To: <20220413204742.5539-1-parri.andrea@gmail.com>

So that padding or uninitialized bytes can't leak guest memory contents.

Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
---
 net/vmw_vsock/hyperv_transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
index 092cadc2c866d..72ce00928c8e7 100644
--- a/net/vmw_vsock/hyperv_transport.c
+++ b/net/vmw_vsock/hyperv_transport.c
@@ -655,7 +655,7 @@ static ssize_t hvs_stream_enqueue(struct vsock_sock *vsk, struct msghdr *msg,
 
 	BUILD_BUG_ON(sizeof(*send_buf) != HV_HYP_PAGE_SIZE);
 
-	send_buf = kmalloc(sizeof(*send_buf), GFP_KERNEL);
+	send_buf = kzalloc(sizeof(*send_buf), GFP_KERNEL);
 	if (!send_buf)
 		return -ENOMEM;
 
-- 
2.25.1

