From: "Zhao1, Wei" <wei.zhao1@intel.com>
To: "dev@dpdk.org" <dev@dpdk.org>
Cc: "stable@dpdk.org" <stable@dpdk.org>,
"Xing, Beilei" <beilei.xing@intel.com>,
"Guo, Jia" <jia.guo@intel.com>
Subject: Re: [dpdk-stable] [PATCH] net/i40e: fix the security risk of wild pointer operation
Date: Fri, 15 May 2020 02:24:42 +0000 [thread overview]
Message-ID: <MWHPR11MB13913D11C1F7DDBE19126EFEB7BD0@MWHPR11MB1391.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20200512151915.105152-1-wei.zhao1@intel.com>
Can any one view for this patch?
Thanks!
> -----Original Message-----
> From: Zhao1, Wei <wei.zhao1@intel.com>
> Sent: Tuesday, May 12, 2020 11:19 PM
> To: dev@dpdk.org
> Cc: stable@dpdk.org; Xing, Beilei <beilei.xing@intel.com>; Zhao1, Wei
> <wei.zhao1@intel.com>
> Subject: [PATCH] net/i40e: fix the security risk of wild pointer operation
>
> In i40e PMD code of function i40e_res_pool_free(), if valid_entry is freed by
> "rte_free(valid_entry);" in the following code:
>
> if (prev != NULL) {
> ........................
>
> if (insert == 1) {
> LIST_REMOVE(valid_entry, next);
> rte_free(valid_entry);
> } else {
> rte_free(valid_entry);
> insert = 1;
> }
> }
>
> then the following code for pool update may still use the wild pointer
> "valid_entry":
>
> " pool->num_free += valid_entry->len;
> pool->num_alloc -= valid_entry>len;
> "
> it seems to be a security bug, we should avoid this risk.
>
> Cc: stable@dpdk.org
> Fixes: 4861cde46116 ("i40e: new poll mode driver")
>
> Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
> ---
> drivers/net/i40e/i40e_ethdev.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index 749d85f54..7f8ea5309 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -4973,6 +4973,9 @@ i40e_res_pool_free(struct i40e_res_pool_info
> *pool,
> }
>
> insert = 0;
> + pool->num_free += valid_entry->len;
> + pool->num_alloc -= valid_entry->len;
> +
> /* Try to merge with next one*/
> if (next != NULL) {
> /* Merge with next one */
> @@ -5010,9 +5013,6 @@ i40e_res_pool_free(struct i40e_res_pool_info
> *pool,
> LIST_INSERT_HEAD(&pool->free_list, valid_entry, next);
> }
>
> - pool->num_free += valid_entry->len;
> - pool->num_alloc -= valid_entry->len;
> -
> return 0;
> }
>
> --
> 2.17.1
next prev parent reply other threads:[~2020-05-15 2:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-12 15:19 Wei Zhao
2020-05-15 2:24 ` Zhao1, Wei [this message]
2020-05-15 6:32 ` [dpdk-stable] [dpdk-dev] " Jeff Guo
2020-05-15 7:28 ` Ye Xiaolong
2020-05-18 5:24 ` Zhao1, Wei
2020-05-18 5:32 ` Ye Xiaolong
2020-05-18 5:10 ` [dpdk-stable] [PATCH v2] net/i40e: fix the core dump " Wei Zhao
2020-05-18 6:43 ` [dpdk-stable] [PATCH v3] " Wei Zhao
2020-05-18 7:43 ` [dpdk-stable] [PATCH v4] " Wei Zhao
2020-05-18 8:00 ` [dpdk-stable] [PATCH v5] " Wei Zhao
2020-05-18 8:45 ` Jeff Guo
2020-05-19 1:28 ` Ye Xiaolong
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