linux-kernel - [PATCH 5.0 012/139] vsock/virtio: free packets during the socket release

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Message-Id: <20190523181722.000324612@linuxfoundation.org>
Date:   Thu, 23 May 2019 21:05:00 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Stefano Garzarella <sgarzare@...hat.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.0 012/139] vsock/virtio: free packets during the socket release

From: Stefano Garzarella <sgarzare@...hat.com>

[ Upstream commit ac03046ece2b158ebd204dfc4896fd9f39f0e6c8 ]

When the socket is released, we should free all packets
queued in the per-socket list in order to avoid a memory
leak.

Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/vmw_vsock/virtio_transport_common.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -786,12 +786,19 @@ static bool virtio_transport_close(struc
 
 void virtio_transport_release(struct vsock_sock *vsk)
 {
+	struct virtio_vsock_sock *vvs = vsk->trans;
+	struct virtio_vsock_pkt *pkt, *tmp;
 	struct sock *sk = &vsk->sk;
 	bool remove_sock = true;
 
 	lock_sock(sk);
 	if (sk->sk_type == SOCK_STREAM)
 		remove_sock = virtio_transport_close(vsk);
+
+	list_for_each_entry_safe(pkt, tmp, &vvs->rx_queue, list) {
+		list_del(&pkt->list);
+		virtio_transport_free_pkt(pkt);
+	}
 	release_sock(sk);
 
 	if (remove_sock)