From: Akhil Goyal <gakhil@marvell.com>
To: Ciara Power <ciara.power@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "roy.fan.zhang@intel.com" <roy.fan.zhang@intel.com>,
"declan.doherty@intel.com" <declan.doherty@intel.com>,
"stable@dpdk.org" <stable@dpdk.org>,
ZhihongX Peng <zhihongx.peng@intel.com>,
Anoob Joseph <anoobj@marvell.com>
Subject: Re: [dpdk-stable] [EXT] [PATCH] crypto: fix heap use after free bug
Date: Tue, 27 Jul 2021 18:04:57 +0000 [thread overview]
Message-ID: <PH0PR18MB4491A7059B135724136C7B96D8E99@PH0PR18MB4491.namprd18.prod.outlook.com> (raw)
In-Reply-To: <20210721125122.185019-1-ciara.power@intel.com>
> The PMD destroy function was calling the release function, which frees
> cryptodev->data, and then tries to free cryptodev->data->dev_private,
> which causes the heap use after free issue.
>
> A temporary pointer is set before the free of cryptodev->data,
> which can then be used afterwards to free dev_private.
> The free cannot be moved to before the release function is called,
> as dev_private is used in the QAT close function while being released.
>
> Fixes: 9e6edea41805 ("cryptodev: add APIs to assist PMD initialisation")
> Cc: declan.doherty@intel.com
> Cc: stable@dpdk.org
>
> Reported-by: ZhihongX Peng <zhihongx.peng@intel.com>
> Signed-off-by: Ciara Power <ciara.power@intel.com>
>
> ---
> The same issue is found in crypto/octeontx,
> which may need to be addressed by maintainers.
> Cc: Anoob Joseph <anoobj@marvell.com>
> ---
> lib/cryptodev/rte_cryptodev_pmd.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/lib/cryptodev/rte_cryptodev_pmd.c
> b/lib/cryptodev/rte_cryptodev_pmd.c
> index 0912004127..900acd7ba4 100644
> --- a/lib/cryptodev/rte_cryptodev_pmd.c
> +++ b/lib/cryptodev/rte_cryptodev_pmd.c
> @@ -140,6 +140,7 @@ int
> rte_cryptodev_pmd_destroy(struct rte_cryptodev *cryptodev)
> {
> int retval;
> + void *tmp_dev_private = cryptodev->data->dev_private;
Can we rename this pointer as dev_private?
>
> CDEV_LOG_INFO("Closing crypto device %s", cryptodev->device-
> >name);
>
> @@ -149,7 +150,7 @@ rte_cryptodev_pmd_destroy(struct rte_cryptodev
> *cryptodev)
> return retval;
>
> if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> - rte_free(cryptodev->data->dev_private);
> + rte_free(tmp_dev_private);
>
>
> cryptodev->device = NULL;
> --
> 2.25.1
next prev parent reply other threads:[~2021-07-27 18:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 12:51 [dpdk-stable] " Ciara Power
2021-07-27 18:04 ` Akhil Goyal [this message]
2021-07-30 19:10 ` [dpdk-stable] [EXT] " Akhil Goyal
2021-07-30 19:11 ` Akhil Goyal
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