netdev - Re: [PATCH v2] hv_sock: Initializing vsk->trans to NULL to prevent a dangling pointer

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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