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From: "Xia, Chenbo" <chenbo.xia@intel.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>,
	"dev@dpdk.org" <dev@dpdk.org>, "Ding, Xuan" <xuan.ding@intel.com>,
	"stephen@networkplumber.org" <stephen@networkplumber.org>,
	"thomas@monjalon.net" <thomas@monjalon.net>,
	"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2 2/3] vhost: fix fd leak in dirty logging setup
Date: Mon, 9 Nov 2020 12:07:20 +0000
Message-ID: <MN2PR11MB4063E61326E0D1B4EFAFB8F89CEA0@MN2PR11MB4063.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20201109112600.250779-3-maxime.coquelin@redhat.com>

Hi Maxime,

> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> Sent: Monday, November 9, 2020 7:26 PM
> To: dev@dpdk.org; Ding, Xuan <xuan.ding@intel.com>;
> stephen@networkplumber.org; thomas@monjalon.net; stable@dpdk.org; Xia,
> Chenbo <chenbo.xia@intel.com>
> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
> Subject: [PATCH v2 2/3] vhost: fix fd leak in dirty logging setup
> 
> This patch fixes a file descriptor leak which happens
> in the error path of vhost_user_set_log_base().
> 
> Fixes: 4796ad63ba1f ("examples/vhost: import userspace vhost application")
> Cc: stable@dpdk.org
> 
> Reported-by: Xuan Ding <xuan.ding@intel.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>  lib/librte_vhost/vhost_user.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> index 473fd778ca..e4ad5f6baf 100644
> --- a/lib/librte_vhost/vhost_user.c
> +++ b/lib/librte_vhost/vhost_user.c
> @@ -2076,7 +2076,7 @@ vhost_user_set_log_base(struct virtio_net **pdev,
> struct VhostUserMsg *msg,
> 
>  	if (fd < 0) {
>  		VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
> -		return RTE_VHOST_MSG_RESULT_ERR;
> +		goto close_msg_fds;

I remember we have agreed on simply return here? As I look back to v1, I think
you may modify the wrong place. Because I see another 'goto close_msg_fds' is
deleted compared with v1 😊.

 	if (msg->size != sizeof(VhostUserLog)) {
 		VHOST_LOG_CONFIG(ERR,
 			"invalid log base msg size: %"PRId32" != %d\n",
 			msg->size, (int)sizeof(VhostUserLog));
-		return RTE_VHOST_MSG_RESULT_ERR;
+		goto close_msg_fds;

Thanks!
Chenbo

>  	}
> 
>  	if (msg->size != sizeof(VhostUserLog)) {
> @@ -2094,7 +2094,7 @@ vhost_user_set_log_base(struct virtio_net **pdev,
> struct VhostUserMsg *msg,
>  		VHOST_LOG_CONFIG(ERR,
>  			"log offset %#"PRIx64" and log size %#"PRIx64"
> overflow\n",
>  			off, size);
> -		return RTE_VHOST_MSG_RESULT_ERR;
> +		goto close_msg_fds;
>  	}
> 
>  	VHOST_LOG_CONFIG(INFO,
> @@ -2131,6 +2131,10 @@ vhost_user_set_log_base(struct virtio_net **pdev,
> struct VhostUserMsg *msg,
>  	msg->fd_num = 0;
> 
>  	return RTE_VHOST_MSG_RESULT_REPLY;
> +
> +close_msg_fds:
> +	close_msg_fds(msg);
> +	return RTE_VHOST_MSG_RESULT_ERR;
>  }
> 
>  static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
> --
> 2.26.2


  reply	other threads:[~2020-11-09 12:07 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-09 11:25 [dpdk-dev] [PATCH v2 0/3] vhost: fix fd an memory leaks Maxime Coquelin
2020-11-09 11:25 ` [dpdk-dev] [PATCH v2 1/3] vhost: fix error path when setting memory tables Maxime Coquelin
2020-11-09 11:25 ` [dpdk-dev] [PATCH v2 2/3] vhost: fix fd leak in dirty logging setup Maxime Coquelin
2020-11-09 12:07   ` Xia, Chenbo [this message]
2020-11-09 12:11     ` Maxime Coquelin
2020-11-09 11:26 ` [dpdk-dev] [PATCH v2 3/3] vhost: fix fd leak in kick setup Maxime Coquelin

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