commit e5440c76de8ed3d9780191bd06ad065792692cb2
author Mahesh A Saptasagar <c_msapta@qti.qualcomm.com> Wed Jan 28 21:21:07 2015 +0530
committer AnjaneeDevi Kapparapu <c_akappa@qti.qualcomm.com> Wed Feb 11 18:04:50 2015 +0530
tree 1fe2812856690399b10c3e5e582b26a8e6c3fd0f
parent 0d82c2188319407e12c543275cde34b276325de0

wlan: Protect nl80211 vendor commands from SSR

Protect nl80211 vendor commands from accessing deallocated
and unitialized data structures while SSR is in progress.

Change-Id: I8983cacc86e02389521679c86f1d7869dd3510a3
CRs-Fixed: 787916

CORE/HDD/src/wlan_hdd_tx_rx.c

diff --git a/CORE/HDD/src/wlan_hdd_tx_rx.c b/CORE/HDD/src/wlan_hdd_tx_rx.c
index 1965abf..d99d4be 100644
--- a/CORE/HDD/src/wlan_hdd_tx_rx.c
+++ b/CORE/HDD/src/wlan_hdd_tx_rx.c
@@ -379,6 +379,8 @@
    struct sk_buff* skb;
    hdd_adapter_t* pMonAdapter = NULL;
    struct ieee80211_hdr *hdr;
+   hdd_context_t *pHddCtx;
+   int ret = 0;
 
    if (pAdapter == NULL)
    {
@@ -387,7 +389,14 @@
       VOS_ASSERT(0);
       return;
    }
-
+   pHddCtx = WLAN_HDD_GET_CTX(pAdapter);
+   ret = wlan_hdd_validate_context(pHddCtx);
+   if (0 != ret)
+   {
+       VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
+                 "%s: HDD context is not valid, ret =%d",__func__, ret);
+       return;
+   }
    pMonAdapter = hdd_get_adapter( pAdapter->pHddCtx, WLAN_HDD_MONITOR );
    if (pMonAdapter == NULL)
    {
@@ -473,12 +482,19 @@
    return;
 }
 
-void hdd_mon_tx_work_queue(struct work_struct *work)
+void __hdd_mon_tx_work_queue(struct work_struct *work)
 {
    hdd_adapter_t* pAdapter = container_of(work, hdd_adapter_t, monTxWorkQueue);
    hdd_mon_tx_mgmt_pkt(pAdapter);
 }
 
+void hdd_mon_tx_work_queue(struct work_struct *work)
+{
+   vos_ssr_protect(__func__);
+   __hdd_mon_tx_work_queue(work);
+   vos_ssr_unprotect(__func__);
+}
+
 int hdd_mon_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
    v_U16_t rt_hdr_len;