From: Stephen Hemminger <stephen@networkplumber.org>
To: Chengwen Feng <fengchengwen@huawei.com>
Cc: <thomas@monjalon.net>, <ferruh.yigit@amd.com>,
Zyta Szpak <zr@semihalf.com>, Liron Himi <lironh@marvell.com>,
Dmitri Epshtein <dima@marvell.com>,
Natalie Samsonov <nsamsono@marvell.com>,
Andrzej Ostruszka <amo@semihalf.com>,
Ferruh Yigit <ferruh.yigit@intel.com>, <dev@dpdk.org>
Subject: Re: [PATCH] net/mvneta: fix possible out-of-bounds write
Date: Tue, 8 Oct 2024 20:48:00 -0700 [thread overview]
Message-ID: <20241008204800.4555e463@hermes.local> (raw)
In-Reply-To: <20241009022342.39152-1-fengchengwen@huawei.com>
On Wed, 9 Oct 2024 02:23:42 +0000
Chengwen Feng <fengchengwen@huawei.com> wrote:
> The mvneta_ifnames_get() function will save 'iface' value to ifnames,
> it will out-of-bounds write if passed many iface pairs (e.g.
> 'iface=xxx,iface=xxx,...').
>
> Fixes: 4ccc8d770d3b ("net/mvneta: add PMD skeleton")
> Cc: stable@dpdk.org
>
> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> Acked-by: Ferruh Yigit <ferruh.yigit@amd.com>
> ---
> drivers/net/mvneta/mvneta_ethdev.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/net/mvneta/mvneta_ethdev.c b/drivers/net/mvneta/mvneta_ethdev.c
> index 3841c1ebe9..c49f083efa 100644
> --- a/drivers/net/mvneta/mvneta_ethdev.c
> +++ b/drivers/net/mvneta/mvneta_ethdev.c
> @@ -91,6 +91,9 @@ mvneta_ifnames_get(const char *key __rte_unused, const char *value,
> {
> struct mvneta_ifnames *ifnames = extra_args;
>
> + if (ifnames->idx >= NETA_NUM_ETH_PPIO)
> + return -EINVAL;
> +
Looks like a reasonable fix but for if some user tried to set up too many
devices, best to add a log message with severity of ERR to help them know why.
next prev parent reply other threads:[~2024-10-09 3:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-09 2:23 Chengwen Feng
2024-10-09 3:48 ` Stephen Hemminger [this message]
2024-10-09 3:48 ` zhoumin
2024-10-09 6:08 ` [PATCH v2] " Chengwen Feng
2024-10-09 15:09 ` Stephen Hemminger
2024-10-09 18:00 ` Stephen Hemminger
2024-10-10 1:01 ` fengchengwen
2024-10-10 0:53 ` [PATCH v3] " Chengwen Feng
2024-10-10 1:10 ` Stephen Hemminger
2024-10-24 6:27 ` Jerin Jacob
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