Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932419AbaF1SY3 (ORCPT ); Sat, 28 Jun 2014 14:24:29 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:54003 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755754AbaF1RvP (ORCPT ); Sat, 28 Jun 2014 13:51:15 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter Subject: [PATCH 3.15 011/139] Staging: rtl8188eu: overflow in update_sta_support_rate() Date: Sat, 28 Jun 2014 10:46:12 -0700 Message-Id: <20140628174605.877565091@linuxfoundation.org> X-Mailer: git-send-email 2.0.1 In-Reply-To: <20140628174605.352098823@linuxfoundation.org> References: <20140628174605.352098823@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter 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 Signed-off-by: Greg Kroah-Hartman --- 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; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/