From: "Wu, Jingjing" <jingjing.wu@intel.com>
To: Yong Wang <wang.yong19@zte.com.cn>,
"Zhang, Helin" <helin.zhang@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH] net/i40e: fix param check to avoid division by 0
Date: Tue, 20 Jun 2017 02:44:46 +0000 [thread overview]
Message-ID: <9BB6961774997848B5B42BEC655768F810DAA643@SHSMSX103.ccr.corp.intel.com> (raw)
In-Reply-To: <1497258420-11814-1-git-send-email-wang.yong19@zte.com.cn>
> -----Original Message-----
> From: Yong Wang [mailto:wang.yong19@zte.com.cn]
> Sent: Monday, June 12, 2017 5:07 PM
> To: Zhang, Helin <helin.zhang@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>
> Cc: dev@dpdk.org; Yong Wang <wang.yong19@zte.com.cn>
> Subject: [PATCH] net/i40e: fix param check to avoid division by 0
>
> In function i40e_vsi_config_tc_queue_mapping(), if 'enabled_tcmap' is
> 0, 'total_tc' might be 0. Then 'total_tc' might be used in a division
> by 0 in "qpnum_per_tc = i40e_align_floor(vsi->nb_qps / total_tc)". Fix
> it by adding a check to parameter 'enabled_tcmap'.
>
> Signed-off-by: Yong Wang <wang.yong19@zte.com.cn>
> ---
> drivers/net/i40e/i40e_ethdev.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index c18a93b..d41b213 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -4257,6 +4257,11 @@ enum i40e_status_code
> int i, total_tc = 0;
> uint16_t qpnum_per_tc, bsf, qp_idx;
>
> + if (enabled_tcmap == 0) {
> + PMD_DRV_LOG(ERR, "Error! enabled tcmap shouldn't be 0");
> + return I40E_ERR_PARAM;
> + }
> +
> ret = validate_tcmap_parameter(vsi, enabled_tcmap);
> if (ret != I40E_SUCCESS)
> return ret;
> --
Thanks for the fix.
Could you add the check in func validate_tcmap_parameter?
Thanks
Jingjing
next prev parent reply other threads:[~2017-06-20 2:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-12 9:07 Yong Wang
2017-06-20 2:44 ` Wu, Jingjing [this message]
2017-06-20 7:48 ` wang.yong19
2017-06-23 10:02 ` Wu, Jingjing
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