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Message-ID: <20241106044145-mutt-send-email-mst@kernel.org>
Date: Wed, 6 Nov 2024 04:42:04 -0500
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Hyunwoo Kim <v4bel@...ori.io>
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
Stefano Garzarella <sgarzare@...hat.com>, jasowang@...hat.com,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Simon Horman <horms@...nel.org>, linux-hyperv@...r.kernel.org,
virtualization@...ts.linux.dev, netdev@...r.kernel.org,
gregkh@...uxfoundation.org, imv4bel@...il.com
Subject: Re: [PATCH v2] hv_sock: Initializing vsk->trans to NULL to prevent a
dangling pointer
On Wed, Nov 06, 2024 at 04:36:04AM -0500, Hyunwoo Kim wrote:
> When hvs is released, there is a possibility that vsk->trans may not
> be initialized to NULL, which could lead to a dangling pointer.
> This issue is resolved by initializing vsk->trans to NULL.
>
> Fixes: ae0078fcf0a5 ("hv_sock: implements Hyper-V transport for Virtual Sockets (AF_VSOCK)")
> Cc: stable@...r.kernel.org
> Signed-off-by: Hyunwoo Kim <v4bel@...ori.io>
Acked-by: Michael S. Tsirkin <mst@...hat.com>
> ---
> v1 -> v2: Add fixes and cc tags
> ---
> net/vmw_vsock/hyperv_transport.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
> index e2157e387217..56c232cf5b0f 100644
> --- a/net/vmw_vsock/hyperv_transport.c
> +++ b/net/vmw_vsock/hyperv_transport.c
> @@ -549,6 +549,7 @@ static void hvs_destruct(struct vsock_sock *vsk)
> vmbus_hvsock_device_unregister(chan);
>
> kfree(hvs);
> + vsk->trans = NULL;
> }
>
> static int hvs_dgram_bind(struct vsock_sock *vsk, struct sockaddr_vm *addr)
> --
> 2.34.1
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