From: Yong Wang <wang.yong19@zte.com.cn>
To: helin.zhang@intel.com, jingjing.wu@intel.com
Cc: dev@dpdk.org, Yong Wang <wang.yong19@zte.com.cn>
Subject: [dpdk-dev] [PATCH] net/i40e: fix param check to avoid division by 0
Date: Mon, 12 Jun 2017 05:07:00 -0400 [thread overview]
Message-ID: <1497258420-11814-1-git-send-email-wang.yong19@zte.com.cn> (raw)
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;
--
1.8.3.1
next reply other threads:[~2017-06-12 9:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-12 9:07 Yong Wang [this message]
2017-06-20 2:44 ` Wu, Jingjing
2017-06-20 7:48 ` wang.yong19
2017-06-23 10:02 ` Wu, Jingjing
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