mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-10-01 05:35:54 +00:00
57 lines
2.1 KiB
Diff
57 lines
2.1 KiB
Diff
From 5b3f9bb678b1f5a57f7664965ee6e082553c1e40 Mon Sep 17 00:00:00 2001
|
|
From: Srinivas Girigowda <sgirigow@codeaurora.org>
|
|
Date: Mon, 21 Nov 2016 19:10:09 -0800
|
|
Subject: [PATCH] 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
|
|
Bug: 32450647
|
|
Signed-off-by: Srinivas Girigowda <sgirigow@codeaurora.org>
|
|
---
|
|
drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c | 9 +++++++++
|
|
1 file changed, 9 insertions(+)
|
|
|
|
diff --git a/drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c b/drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c
|
|
index 82275c27ae587..89dba5d54b627 100644
|
|
--- a/drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c
|
|
+++ b/drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c
|
|
@@ -4992,11 +4992,19 @@ 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)) {
|
|
@@ -5058,6 +5066,7 @@ static int hdd_extscan_passpoint_fill_network_list(
|
|
|
|
index++;
|
|
}
|
|
+ req_msg->num_networks = index;
|
|
return 0;
|
|
}
|
|
|