mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-24 15:09:34 -05:00
58 lines
1.8 KiB
Diff
58 lines
1.8 KiB
Diff
|
From 81b6b5538d3227ed4b925fcceedb109abb2a4c61 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Jeff Johnson <jjohnson@codeaurora.org>
|
||
|
|
Date: Fri, 18 Nov 2016 11:35:01 -0800
|
||
|
|
Subject: qcacld-2.0: Avoid overflow of passpoint network list
|
||
|
|
|
||
|
|
Currently when processing a passpoint vendor command the "num
|
||
|
|
networks" attribute is limit checked and if it exceeds a MAX value
|
||
|
|
then the command is rejected. Otherwise this value is used to
|
||
|
|
calculate the size of the buffer allocated to hold the internal
|
||
|
|
representation of the request. However later when the network
|
||
|
|
attributes are parsed there is no check to make sure the number of
|
||
|
|
networks processed does not exceed the "num networks" used to allocate
|
||
|
|
memory, and as a result a buffer overflow can occur. Address this
|
||
|
|
issue by aborting the network parsing once "num networks" records have
|
||
|
|
been parsed.
|
||
|
|
|
||
|
|
Change-Id: I38d9f19b08b42fa9a850eb70a42920fbc3b99cf6
|
||
|
|
CRs-Fixed: 1092059
|
||
|
|
---
|
||
|
|
CORE/HDD/src/wlan_hdd_cfg80211.c | 9 +++++++++
|
||
|
|
1 file changed, 9 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
|
||
|
|
index a2ff8fe..54c5e54 100644
|
||
|
|
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
|
||
|
|
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
|
||
|
|
@@ -5127,11 +5127,19 @@ static int hdd_extscan_passpoint_fill_network_list(
|
||
|
|
struct nlattr *networks;
|
||
|
|
int rem1, len;
|
||
|
|
uint8_t index;
|
||
|
|
+ uint32_t expected_networks;
|
||
|
|
|
||
|
|
+ expected_networks = req_msg->num_networks;
|
||
|
|
index = 0;
|
||
|
|
nla_for_each_nested(networks,
|
||
|
|
tb[QCA_WLAN_VENDOR_ATTR_PNO_PASSPOINT_LIST_PARAM_NETWORK_ARRAY],
|
||
|
|
rem1) {
|
||
|
|
+
|
||
|
|
+ if (index == expected_networks) {
|
||
|
|
+ hddLog(LOGW, FL("ignoring excess networks"));
|
||
|
|
+ break;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
if (nla_parse(network,
|
||
|
|
QCA_WLAN_VENDOR_ATTR_PNO_MAX,
|
||
|
|
nla_data(networks), nla_len(networks), NULL)) {
|
||
|
|
@@ -5193,6 +5201,7 @@ static int hdd_extscan_passpoint_fill_network_list(
|
||
|
|
|
||
|
|
index++;
|
||
|
|
}
|
||
|
|
+ req_msg->num_networks = index;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
--
|
||
|
|
cgit v1.1
|
||
|
|
|