From: Kalle Valo <kvalo@codeaurora.org>
To: Xiaohui Zhang <ruc_zhangxiaohui@163.com>
Cc: Amitkumar Karwar <amitkarwar@gmail.com>,
Ganapathi Bhat <ganapathi.bhat@nxp.com>,
Xinming Hu <huxinming820@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] mwifiex: Fix possible buffer overflows in mwifiex_config_scan
Date: Tue, 08 Dec 2020 16:29:29 +0200 [thread overview]
Message-ID: <877dpse5h2.fsf@codeaurora.org> (raw)
In-Reply-To: <20201208124523.8169-1-ruc_zhangxiaohui@163.com> (Xiaohui Zhang's message of "Tue, 8 Dec 2020 20:45:23 +0800")
Xiaohui Zhang <ruc_zhangxiaohui@163.com> writes:
> From: Zhang Xiaohui <ruc_zhangxiaohui@163.com>
>
> mwifiex_config_scan() calls memcpy() without checking
> the destination size may trigger a buffer overflower,
> which a local user could use to cause denial of service
> or the execution of arbitrary code.
> Fix it by putting the length check before calling memcpy().
>
> Signed-off-by: Zhang Xiaohui <ruc_zhangxiaohui@163.com>
> ---
> drivers/net/wireless/marvell/mwifiex/scan.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c b/drivers/net/wireless/marvell/mwifiex/scan.c
> index c2a685f63..b1d90678f 100644
> --- a/drivers/net/wireless/marvell/mwifiex/scan.c
> +++ b/drivers/net/wireless/marvell/mwifiex/scan.c
> @@ -930,6 +930,8 @@ mwifiex_config_scan(struct mwifiex_private *priv,
> "DIRECT-", 7))
> wildcard_ssid_tlv->max_ssid_length = 0xfe;
>
> + if (ssid_len > 1)
> + ssid_len = 1;
> memcpy(wildcard_ssid_tlv->ssid,
> user_scan_in->ssid_list[i].ssid, ssid_len);
min_t()?
--
https://patchwork.kernel.org/project/linux-wireless/list/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
next prev parent reply other threads:[~2020-12-08 14:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-08 12:45 [PATCH 1/1] mwifiex: Fix possible buffer overflows in mwifiex_config_scan Xiaohui Zhang
2020-12-08 14:29 ` Kalle Valo [this message]
2020-12-09 0:36 ` Julian Calaby
2021-01-09 15:08 ` Peter Seiderer
2021-01-11 18:51 ` Brian Norris
2020-12-08 15:09 Xiaohui Zhang
2020-12-08 19:12 ` Brian Norris
2020-12-17 16:28 ` Kalle Valo
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