DivestOS/Patches/Linux_CVEs/CVE-2015-0570/1.patch

From 606babd474290e84e5a86f94480f62f4a5ff92ac Mon Sep 17 00:00:00 2001
From: Mahesh A Saptasagar <c_msapta@qti.qualcomm.com>
Date: Tue, 27 Oct 2015 15:13:46 +0530
Subject: wlan: Validate ioctls for valid input length

Return failure to applications if ioctl is invoked with arguments
of improper length.

Change-Id: I01589f37996510ee130485ef43e1f36811692e28
CRs-Fixed: 930542
---
 CORE/HDD/src/wlan_hdd_hostapd.c | 60 ++++++++++++++++++++++++++++++++---------
 1 file changed, 47 insertions(+), 13 deletions(-)

diff --git a/CORE/HDD/src/wlan_hdd_hostapd.c b/CORE/HDD/src/wlan_hdd_hostapd.c
index bdee270..dffcc05 100644
--- a/CORE/HDD/src/wlan_hdd_hostapd.c
+++ b/CORE/HDD/src/wlan_hdd_hostapd.c
@@ -3958,9 +3958,8 @@ static int __iw_softap_setwpsie(struct net_device *dev,
          case DOT11F_EID_WPA: 
             if (wps_genie[1] < 2 + 4)
             {
-               vos_mem_free(pSap_WPSIe); 
-               kfree(fwps_genie);
-               return -EINVAL;
+               ret = -EINVAL;
+               goto exit;
             }
             else if (memcmp(&wps_genie[2], "\x00\x50\xf2\x04", 4) == 0) 
             {
@@ -4018,6 +4017,11 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                       pos += 2; 
                       length = *pos<<8 | *(pos+1);
                       pos += 2;
+                      if (length > sizeof(pSap_WPSIe->sapwpsie.sapWPSBeaconIE.UUID_E))
+                      {
+                          ret = -EINVAL;
+                          goto exit;
+                      }
                       vos_mem_copy(pSap_WPSIe->sapwpsie.sapWPSBeaconIE.UUID_E, pos, length);
                       pSap_WPSIe->sapwpsie.sapWPSBeaconIE.FieldPresent |= WPS_BEACON_UUIDE_PRESENT; 
                       pos += length;
@@ -4032,9 +4036,8 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                    
                    default:
                       hddLog (LOGW, "UNKNOWN TLV in WPS IE(%x)", (*pos<<8 | *(pos+1)));
-                      vos_mem_free(pSap_WPSIe);
-                      kfree(fwps_genie);
-                      return -EINVAL; 
+                      ret = -EINVAL;
+                      goto exit;
                 }
               }  
             }
@@ -4046,9 +4049,8 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                  
          default:
             hddLog (LOGE, "%s Set UNKNOWN IE %X",__func__, wps_genie[0]);
-            vos_mem_free(pSap_WPSIe);
-            kfree(fwps_genie);
-            return 0;
+            ret = -EINVAL;
+            goto exit;
       }
     } 
     else if( wps_genie[0] == eQC_WPS_PROBE_RSP_IE)
@@ -4060,9 +4062,8 @@ static int __iw_softap_setwpsie(struct net_device *dev,
          case DOT11F_EID_WPA: 
             if (wps_genie[1] < 2 + 4)
             {
-               vos_mem_free(pSap_WPSIe); 
-               kfree(fwps_genie);
-               return -EINVAL;
+                ret = -EINVAL;
+                goto exit;
             }
             else if (memcmp(&wps_genie[2], "\x00\x50\xf2\x04", 4) == 0) 
             {
@@ -4126,6 +4127,11 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                       pos += 2; 
                       length = *pos<<8 | *(pos+1);
                       pos += 2;
+                      if (length > (sizeof(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.UUID_E)))
+                      {
+                          ret = -EINVAL;
+                          goto exit;
+                      }
                       vos_mem_copy(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.UUID_E, pos, length);
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.FieldPresent |= WPS_PROBRSP_UUIDE_PRESENT;
                       pos += length;
@@ -4135,6 +4141,11 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                       pos += 2;
                       length = *pos<<8 | *(pos+1);
                       pos += 2;
+                      if (length >  (sizeof(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.Manufacture.name)))
+                      {
+                          ret = -EINVAL;
+                          goto exit;
+                      }
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.Manufacture.num_name = length;
                       vos_mem_copy(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.Manufacture.name, pos, length);
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.FieldPresent |= WPS_PROBRSP_MANUFACTURE_PRESENT;
@@ -4145,6 +4156,11 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                       pos += 2;
                       length = *pos<<8 | *(pos+1);
                       pos += 2;
+                      if (length > (sizeof(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.ModelName.text)))
+                      {
+                          ret = -EINVAL;
+                          goto exit;
+                      }
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.ModelName.num_text = length;
                       vos_mem_copy(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.ModelName.text, pos, length);
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.FieldPresent |= WPS_PROBRSP_MODELNAME_PRESENT;
@@ -4154,6 +4170,11 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                       pos += 2;
                       length = *pos<<8 | *(pos+1);
                       pos += 2;
+                      if (length > (sizeof(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.ModelNumber.text)))
+                      {
+                          ret = -EINVAL;
+                          goto exit;
+                      }
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.ModelNumber.num_text = length;
                       vos_mem_copy(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.ModelNumber.text, pos, length);
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.FieldPresent |= WPS_PROBRSP_MODELNUMBER_PRESENT;
@@ -4163,6 +4184,11 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                       pos += 2;
                       length = *pos<<8 | *(pos+1);
                       pos += 2;
+                      if (length > (sizeof(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.SerialNumber.text)))
+                      {
+                          ret = -EINVAL;
+                          goto exit;
+                      }
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.SerialNumber.num_text = length;
                       vos_mem_copy(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.SerialNumber.text, pos, length);
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.FieldPresent |= WPS_PROBRSP_SERIALNUMBER_PRESENT;
@@ -4186,6 +4212,11 @@ static int __iw_softap_setwpsie(struct net_device *dev,
                       pos += 2;
                       length = *pos<<8 | *(pos+1);
                       pos += 2;
+                      if (length > (sizeof(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.DeviceName.text)))
+                      {
+                          ret = -EINVAL;
+                          goto exit;
+                      }
                       pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.DeviceName.num_text = length;
                       vos_mem_copy(pSap_WPSIe->sapwpsie.sapWPSProbeRspIE.DeviceName.text, pos, length);
                       pos += length;
@@ -4217,6 +4248,8 @@ static int __iw_softap_setwpsie(struct net_device *dev,
       } // switch
     }
     halStatus = WLANSAP_Set_WpsIe(pVosContext, pSap_WPSIe);
+    if (halStatus != eHAL_STATUS_SUCCESS)
+        ret = -EINVAL;
     pHostapdState = WLAN_HDD_GET_HOSTAP_STATE_PTR(pHostapdAdapter);
     if( pHostapdState->bCommit && WPSIeType == eQC_WPS_PROBE_RSP_IE)
     {
@@ -4225,10 +4258,11 @@ static int __iw_softap_setwpsie(struct net_device *dev,
         WLANSAP_Update_WpsIe ( pVosContext );
     }
  
+exit:
     vos_mem_free(pSap_WPSIe);   
     kfree(fwps_genie);
     EXIT();
-    return halStatus;
+    return ret;
 }
 
 static int iw_softap_setwpsie(struct net_device *dev,
-- 
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