commit 4534e2b108a590eda15ba9cc3a25b4b926b5907a
author Mahesh A Saptasagar <c_msapta@qti.qualcomm.com> Thu Mar 05 20:45:41 2015 +0530
committer Satyanarayana Dash <c_sadash@qti.qualcomm.com> Wed Mar 25 23:32:23 2015 +0530
tree ac521075cb29be29bc8a9dabdb1e77f4ca1947de
parent 88f556ba77b848ab047a528bc1cabb200ba5da0c

wlan: Validate timer callbacks for NULL pointer de-reference

Address possible kernel panics due to NULL pointer de-references
in  timer callbacks during load/unload or SSR by validating the
context for same.

Change-Id: I6333eb132e893b191dd1f2ec11902457b7fb565c
CRs-Fixed: 805636

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 efbd607..3218da7 100644
--- a/CORE/HDD/src/wlan_hdd_tx_rx.c
+++ b/CORE/HDD/src/wlan_hdd_tx_rx.c
@@ -2698,14 +2698,11 @@
     v_U8_t staId = 0;
     v_U8_t fconnected = 0;
 
-   if (NULL == phddctx)
-   {
-       VOS_TRACE( VOS_MODULE_ID_HDD_DATA, VOS_TRACE_LEVEL_ERROR,
-              FL("phddctx is NULL"));
-       VOS_ASSERT(0);
-       return;
-   }
-
+    ENTER();
+    if (0 != (wlan_hdd_validate_context(pHddCtx)))
+    {
+        return;
+    }
     if (!cfg_param->dynSplitscan)
     {
         VOS_TRACE( VOS_MODULE_ID_HDD_DATA, VOS_TRACE_LEVEL_INFO,
@@ -2817,6 +2814,7 @@
                                   SME_DISABLE_SPLIT_SCAN,
                                   SME_DISABLE_SPLIT_SCAN);
     }
+    EXIT();
     return;
 }