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72 lines
2.6 KiB
Diff
72 lines
2.6 KiB
Diff
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From 054ce0761e900c5f63089393f8b6cadf17d55ade Mon Sep 17 00:00:00 2001
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From: Hanumanth Reddy Pothula <c_hpothu@codeaurora.org>
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Date: Fri, 27 Jan 2017 16:43:45 +0530
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Subject: prima: Avoid overflow of "set_bssid_hotlist" params
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qcacld2.0 to prima propgation
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The wlan driver supports the following vendor command:
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QCA_NL80211_VENDOR_SUBCMD_EXTSCAN_SET_BSSID_HOTLIST
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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: I41e36d11bc3e71928866a27afc2fbf046b59f0f5
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CRs-Fixed: 1095770
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---
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CORE/HDD/src/wlan_hdd_cfg80211.c | 16 ++++++++++++++++
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1 file changed, 16 insertions(+)
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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 8aa38d1..f130174 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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@@ -3764,10 +3764,20 @@ static int __wlan_hdd_cfg80211_extscan_set_bssid_hotlist(struct wiphy *wiphy,
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pReqMsg->numBssid = nla_get_u32(
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tb[QCA_WLAN_VENDOR_ATTR_EXTSCAN_BSSID_HOTLIST_PARAMS_NUM_AP]);
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+ if (pReqMsg->numBssid > WLAN_EXTSCAN_MAX_HOTLIST_APS) {
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+ hddLog(LOGE, FL("Number of AP: %u exceeds max: %u"),
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+ pReqMsg->numBssid, WLAN_EXTSCAN_MAX_HOTLIST_APS);
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+ goto fail;
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+ }
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hddLog(VOS_TRACE_LEVEL_INFO, FL("Number of AP (%d)"), pReqMsg->numBssid);
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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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+ if (i == pReqMsg->numBssid) {
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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, QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_MAX,
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nla_data(apTh), nla_len(apTh),
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NULL)) {
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@@ -3806,6 +3816,12 @@ static int __wlan_hdd_cfg80211_extscan_set_bssid_hotlist(struct wiphy *wiphy,
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i++;
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}
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+ if (i < pReqMsg->numBssid) {
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+ hddLog(LOGW, FL("Number of AP %u less than expected %u"),
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+ i, pReqMsg->numBssid);
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+ pReqMsg->numBssid = i;
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+ }
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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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INIT_COMPLETION(context->response_event);
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--
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cgit v1.1
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