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118 lines
4.6 KiB
Diff
118 lines
4.6 KiB
Diff
From 9ba50d536227666a5b6abd51f2b122675d950488 Mon Sep 17 00:00:00 2001
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From: Jeff Johnson <jjohnson@codeaurora.org>
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Date: Wed, 9 Nov 2016 09:01:10 -0800
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Subject: qcacld-2.0: Properly parse PNO vendor command
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Currently there is a single wlan_hdd_extscan_config_policy which
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contains entries for both EXTSCAN and PNO attributes. However the
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EXTSCAN and PNO attributes have separate and overlapping
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assignments. Therefore one policy cannot be used by both types of
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commands. In addition, when parsing nested PNO attributes the policy
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is not used, and hence no checking is performed on the nested
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data. This can result in a buffer overflow.
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To address these issues introduce a new policy for PNO vendor
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commands, and use that policy both when parsing the initial command
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and when parsing the nested attributes. Furthermore add a zero length
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SSID check to prevent underflow.
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Change-Id: I92c8fc7ca1c44971502ea68b5486a2b3ae941cc5
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CRs-Fixed: 1087209
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---
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CORE/HDD/src/wlan_hdd_cfg80211.c | 45 +++++++++++++++++++++++++++-------------
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1 file changed, 31 insertions(+), 14 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 c9e62c4..f488edc 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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@@ -842,11 +842,6 @@ wlan_hdd_extscan_config_policy[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SIGNIFICANT_CHANGE_PARAMS_LOST_AP_SAMPLE_SIZE] = { .type = NLA_U32 },
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SIGNIFICANT_CHANGE_PARAMS_MIN_BREACHING] = { .type = NLA_U32 },
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SIGNIFICANT_CHANGE_PARAMS_NUM_AP] = { .type = NLA_U32 },
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- [QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_NUM_NETWORKS] = { .type = NLA_U32 },
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- [QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORK_SSID] = { .type = NLA_BINARY,
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- .len = IEEE80211_MAX_SSID_LEN },
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- [QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORK_FLAGS] = { .type = NLA_U8 },
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- [QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORK_AUTH_BIT] = { .type = NLA_U8 },
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SSID_THRESHOLD_PARAM_SSID] = { .type = NLA_BINARY,
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.len = IEEE80211_MAX_SSID_LEN + 1 },
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SSID_HOTLIST_PARAMS_LOST_SSID_SAMPLE_SIZE] = { .type = NLA_U32 },
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@@ -858,6 +853,23 @@ wlan_hdd_extscan_config_policy[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_
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};
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static const struct nla_policy
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+wlan_hdd_pno_config_policy[QCA_WLAN_VENDOR_ATTR_PNO_MAX + 1] = {
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+ [QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_NUM_NETWORKS] = {
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+ .type = NLA_U32
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+ },
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+ [QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORK_SSID] = {
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+ .type = NLA_BINARY,
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+ .len = IEEE80211_MAX_SSID_LEN + 1
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+ },
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+ [QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORK_FLAGS] = {
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+ .type = NLA_U8
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+ },
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+ [QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORK_AUTH_BIT] = {
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+ .type = NLA_U8
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+ },
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+};
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+
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+static const struct nla_policy
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wlan_hdd_extscan_results_policy[QCA_WLAN_VENDOR_ATTR_EXTSCAN_RESULTS_MAX + 1] =
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{
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_RESULTS_SCAN_RESULT_BEACON_PERIOD] = { .type = NLA_U16 },
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@@ -4672,19 +4684,18 @@ static int hdd_extscan_epno_fill_network_list(
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struct wifi_epno_params *req_msg,
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struct nlattr **tb)
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{
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- struct nlattr *network[
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- QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_MAX + 1];
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+ struct nlattr *network[QCA_WLAN_VENDOR_ATTR_PNO_MAX + 1];
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struct nlattr *networks;
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int rem1, ssid_len;
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uint8_t index, *ssid;
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index = 0;
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nla_for_each_nested(networks,
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- tb[QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORKS_LIST],
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- rem1) {
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- if (nla_parse(network,
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- QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_MAX,
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- nla_data(networks), nla_len(networks), NULL)) {
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+ tb[QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORKS_LIST],
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+ rem1) {
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+ if (nla_parse(network, QCA_WLAN_VENDOR_ATTR_PNO_MAX,
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+ nla_data(networks), nla_len(networks),
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+ wlan_hdd_pno_config_policy)) {
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hddLog(LOGE, FL("nla_parse failed"));
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return -EINVAL;
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}
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@@ -4697,6 +4708,12 @@ static int hdd_extscan_epno_fill_network_list(
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ssid_len = nla_len(
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network[QCA_WLAN_VENDOR_ATTR_PNO_SET_LIST_PARAM_EPNO_NETWORK_SSID]);
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+ /* nla_parse will detect overflow but not underflow */
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+ if (0 == ssid_len) {
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+ hddLog(LOGE, FL("zero ssid length"));
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+ return -EINVAL;
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+ }
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+
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/* Decrement by 1, don't count null character */
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ssid_len--;
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@@ -4771,8 +4788,8 @@ static int __wlan_hdd_cfg80211_set_epno_list(struct wiphy *wiphy,
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}
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if (nla_parse(tb, QCA_WLAN_VENDOR_ATTR_PNO_MAX,
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- data, data_len,
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- wlan_hdd_extscan_config_policy)) {
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+ data, data_len,
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+ wlan_hdd_pno_config_policy)) {
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hddLog(LOGE, FL("Invalid ATTR"));
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return -EINVAL;
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}
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--
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cgit v1.1
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