Re: [dpdk-dev] [PATCH] net/txgbe: fix null pointer check problem

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 4/29/2021 4:35 AM, Jiawen Wu wrote:
> On April 27, 2021 11:31 PM, Ferruh Yigit wrote:
>> On 4/25/2021 1:54 PM, Min Hu (Connor) wrote:
>>> From: HongBo Zheng <zhenghongbo3@huawei.com>
>>>
>>> In function cons_parse_ntuple_filter, item->spec and item->mask should
>>> be confirmed not null before use memcmp on it, current judgement
>>> (item->spec || item->mask) just can confirm item->spec or item->mask
>>> is not null, and cause null pointer be used in memcmp.
>>>
>>> This patch fix this problem.
>>>
>>> Fixes: b7eeecb17556 ("net/txgbe: parse n-tuple filter")
>>> Cc: stable@dpdk.org
>>>
>>> Signed-off-by: HongBo Zheng <zhenghongbo3@huawei.com>
>>> Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
>>> ---
>>>  drivers/net/txgbe/txgbe_flow.c | 18 ++++++++----------
>>>  1 file changed, 8 insertions(+), 10 deletions(-)
>>>
>>> diff --git a/drivers/net/txgbe/txgbe_flow.c
>>> b/drivers/net/txgbe/txgbe_flow.c index 57a4f2e..35026ee 100644
>>> --- a/drivers/net/txgbe/txgbe_flow.c
>>> +++ b/drivers/net/txgbe/txgbe_flow.c
>>> @@ -240,11 +240,10 @@ cons_parse_ntuple_filter(const struct
>> rte_flow_attr *attr,
>>>  			return -rte_errno;
>>>  		}
>>>  		/* if the first item is MAC, the content should be NULL */
>>> -		if ((item->spec || item->mask) &&
>>> -			(memcmp(eth_spec, &eth_null,
>>> -				sizeof(struct rte_flow_item_eth)) ||
>>> -			 memcmp(eth_mask, &eth_null,
>>> -				sizeof(struct rte_flow_item_eth)))) {
>>> +		if ((item->spec && memcmp(eth_spec, &eth_null,
>>> +					  sizeof(struct rte_flow_item_eth))) ||
>>> +		    (item->mask && memcmp(eth_mask, &eth_null,
>>> +					  sizeof(struct rte_flow_item_eth)))) {
>>>  			rte_flow_error_set(error, EINVAL,
>>>  				RTE_FLOW_ERROR_TYPE_ITEM,
>>>  				item, "Not supported by ntuple filter"); @@ -272,11
>> +271,10 @@
>>> cons_parse_ntuple_filter(const struct rte_flow_attr *attr,
>>>  			return -rte_errno;
>>>  		}
>>>  		/* the content should be NULL */
>>> -		if ((item->spec || item->mask) &&
>>> -			(memcmp(vlan_spec, &vlan_null,
>>> -				sizeof(struct rte_flow_item_vlan)) ||
>>> -			 memcmp(vlan_mask, &vlan_null,
>>> -				sizeof(struct rte_flow_item_vlan)))) {
>>> +		if ((item->spec && memcmp(vlan_spec, &vlan_null,
>>> +					  sizeof(struct rte_flow_item_vlan))) ||
>>> +		    (item->mask && memcmp(vlan_mask, &vlan_null,
>>> +					  sizeof(struct rte_flow_item_vlan)))) {
>>>  			rte_flow_error_set(error, EINVAL,
>>>  				RTE_FLOW_ERROR_TYPE_ITEM,
>>>  				item, "Not supported by ntuple filter");
>>>
>>
>> Looks good to me, but lets wait or maintainers review.
> 
> Thanks.
> Acked-by: Jiawen Wu <jiawenwu@trustnetic.com>
> 

Applied to dpdk-next-net/main, thanks.