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91 lines
3.3 KiB
Diff
91 lines
3.3 KiB
Diff
From da87131740351b833f17f05dfa859977bc1e7684 Mon Sep 17 00:00:00 2001
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From: Jeff Johnson <jjohnson@codeaurora.org>
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Date: Tue, 29 Nov 2016 08:19:13 -0800
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Subject: qcacld-2.0: Avoid overflow of "significant change" params
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The wlan driver supports the following vendor command:
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QCA_NL80211_VENDOR_SUBCMD_EXTSCAN_SET_SIGNIFICANT_CHANGE
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This command supplies a "number of APs" attribute as well as a list of
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per-AP attributes. However there is no validation that the number of
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APs provided won't overflow the destination buffer. In addition there
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is no validation that the number of APs actually provided matches the
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number of APs expected.
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To address these issues:
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* Verify that the expected number of APs doesn't exceed the maximum
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allowed number of APs
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* Verify that the actual number of APs supplied doesn't exceed the
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expected number of APs
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* Only process the actual number of supplied APs if it is less than
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the expected number of APs.
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Change-Id: I0513ffbc4a38f1d7ddbc0815d3618fc9a2ea4f77
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CRs-Fixed: 1095009
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---
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CORE/HDD/src/wlan_hdd_cfg80211.c | 16 ++++++++++++++++
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CORE/SERVICES/WMA/wma.c | 6 +++---
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2 files changed, 19 insertions(+), 3 deletions(-)
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diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
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index 800d123..d91859f 100644
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--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
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+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
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@@ -3342,6 +3342,11 @@ static int __wlan_hdd_cfg80211_extscan_set_significant_change(
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}
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pReqMsg->numAp = nla_get_u32(
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tb[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SIGNIFICANT_CHANGE_PARAMS_NUM_AP]);
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+ if (pReqMsg->numAp > WLAN_EXTSCAN_MAX_SIGNIFICANT_CHANGE_APS) {
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+ hddLog(LOGE, FL("Number of AP %u exceeds max %u"),
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+ pReqMsg->numAp, WLAN_EXTSCAN_MAX_SIGNIFICANT_CHANGE_APS);
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+ goto fail;
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+ }
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pReqMsg->sessionId = pAdapter->sessionId;
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hddLog(LOG1, FL("Number of AP %d Session Id %d"), pReqMsg->numAp,
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@@ -3350,6 +3355,12 @@ static int __wlan_hdd_cfg80211_extscan_set_significant_change(
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i = 0;
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nla_for_each_nested(apTh,
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tb[QCA_WLAN_VENDOR_ATTR_EXTSCAN_AP_THRESHOLD_PARAM], rem) {
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+
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+ if (i == pReqMsg->numAp) {
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+ hddLog(LOGW, FL("Ignoring excess AP"));
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+ break;
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+ }
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+
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if (nla_parse(tb2,
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QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_MAX,
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nla_data(apTh), nla_len(apTh),
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@@ -3389,6 +3400,11 @@ static int __wlan_hdd_cfg80211_extscan_set_significant_change(
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i++;
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}
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+ if (i < pReqMsg->numAp) {
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+ hddLog(LOGW, FL("Number of AP %u less than expected %u"),
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+ i, pReqMsg->numAp);
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+ pReqMsg->numAp = i;
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+ }
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context = &pHddCtx->ext_scan_context;
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spin_lock(&hdd_context_lock);
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diff --git a/CORE/SERVICES/WMA/wma.c b/CORE/SERVICES/WMA/wma.c
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index 0f803d4..2cf66bf 100644
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--- a/CORE/SERVICES/WMA/wma.c
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+++ b/CORE/SERVICES/WMA/wma.c
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@@ -28926,9 +28926,9 @@ VOS_STATUS wma_get_buf_extscan_change_monitor_cmd(tp_wma_handle wma_handle,
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int numap = psigchange->numAp;
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tSirAPThresholdParam *src_ap = psigchange->ap;
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- if (!numap) {
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- WMA_LOGE("%s: Invalid number of bssid's",
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- __func__);
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+ if ((numap <= 0) || (numap > WLAN_EXTSCAN_MAX_SIGNIFICANT_CHANGE_APS)) {
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+ WMA_LOGE("%s: Invalid number of APs: %d",
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+ __func__, numap);
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return VOS_STATUS_E_INVAL;
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}
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len += WMI_TLV_HDR_SIZE;
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--
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cgit v1.1
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