From: Dan Carpenter <dan.carpenter@oracle.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Larry Finger <Larry.Finger@lwfinger.net>,
Faris de Haan <farisdehaan@gmail.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
devel@driverdev.osuosl.org, linux-wireless@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [patch] Staging: rtl8188eu: overflow in update_sta_support_rate()
Date: Mon, 07 Apr 2014 06:31:21 +0000 [thread overview]
Message-ID: <20140407063121.GB11581@mwanda> (raw)
The ->SupportedRates[] array has NDIS_802_11_LENGTH_RATES_EX (16)
elements. Since "ie_len" comes from then network and can go up to 255
then it means we should add a range check to prevent memory corruption.
Fixes: d6846af679e0 ('staging: r8188eu: Add files for new driver - part 7')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/staging/rtl8188eu/core/rtw_wlan_util.c b/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
index 3dd9059..6c9e9a1 100644
--- a/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
+++ b/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
@@ -1599,13 +1599,18 @@ int update_sta_support_rate(struct adapter *padapter, u8 *pvar_ie, uint var_ie_l
pIE = (struct ndis_802_11_var_ie *)rtw_get_ie(pvar_ie, _SUPPORTEDRATES_IE_, &ie_len, var_ie_len);
if (pIE = NULL)
return _FAIL;
+ if (ie_len > NDIS_802_11_LENGTH_RATES_EX)
+ return _FAIL;
memcpy(pmlmeinfo->FW_sta_info[cam_idx].SupportedRates, pIE->data, ie_len);
supportRateNum = ie_len;
pIE = (struct ndis_802_11_var_ie *)rtw_get_ie(pvar_ie, _EXT_SUPPORTEDRATES_IE_, &ie_len, var_ie_len);
- if (pIE)
+ if (pIE) {
+ if (supportRateNum + ie_len > NDIS_802_11_LENGTH_RATES_EX)
+ return _FAIL;
memcpy((pmlmeinfo->FW_sta_info[cam_idx].SupportedRates + supportRateNum), pIE->data, ie_len);
+ }
return _SUCCESS;
}
reply other threads:[~2014-04-07 6:31 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140407063121.GB11581@mwanda \
--to=dan.carpenter@oracle.com \
--cc=Larry.Finger@lwfinger.net \
--cc=devel@driverdev.osuosl.org \
--cc=farisdehaan@gmail.com \
--cc=geert@linux-m68k.org \
--cc=gregkh@linuxfoundation.org \
--cc=kernel-janitors@vger.kernel.org \
--cc=linux-wireless@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox