[dpdk-dev] [PATCH] net/txgbe: fix null pointer check problem
Ferruh Yigit
ferruh.yigit at intel.com
Tue Apr 27 17:30:58 CEST 2021
On 4/25/2021 1:54 PM, Min Hu (Connor) wrote:
> From: HongBo Zheng <zhenghongbo3 at 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 at dpdk.org
>
> Signed-off-by: HongBo Zheng <zhenghongbo3 at huawei.com>
> Signed-off-by: Min Hu (Connor) <humin29 at 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, ð_null,
> - sizeof(struct rte_flow_item_eth)) ||
> - memcmp(eth_mask, ð_null,
> - sizeof(struct rte_flow_item_eth)))) {
> + if ((item->spec && memcmp(eth_spec, ð_null,
> + sizeof(struct rte_flow_item_eth))) ||
> + (item->mask && memcmp(eth_mask, ð_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.
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