Patch "Staging: rtl8188eu: overflow in update_sta_support_rate()" has been added to the 3.15-stable tree

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This is a note to let you know that I've just added the patch titled

    Staging: rtl8188eu: overflow in update_sta_support_rate()

to the 3.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     staging-rtl8188eu-overflow-in-update_sta_support_rate.patch
and it can be found in the queue-3.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 9dbd79aeb9842144d9a114a979a12c0949ee11eb Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Mon, 7 Apr 2014 09:31:21 +0300
Subject: Staging: rtl8188eu: overflow in update_sta_support_rate()

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit 9dbd79aeb9842144d9a114a979a12c0949ee11eb upstream.

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@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/staging/rtl8188eu/core/rtw_wlan_util.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- 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 adapt
 	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;
 }


Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are

queue-3.15/staging-rtl8188eu-overflow-in-update_sta_support_rate.patch
queue-3.15/applicom-dereferencing-null-on-error-path.patch
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