staging: ath6kl: check return code of get_user and put_user

Function get_user may fail. Check for it.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/ath6kl/os/linux/ioctl.c b/drivers/staging/ath6kl/os/linux/ioctl.c
index 02af4b9..8ed87e7 100644 (file)
--- a/drivers/staging/ath6kl/os/linux/ioctl.c
+++ b/drivers/staging/ath6kl/os/linux/ioctl.c
@@ -1874,7 +1874,10 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
          * the first word of the parameter block, and use the command
          * AR6000_IOCTL_EXTENDED_CMD on the ioctl call.
          */
-        get_user(cmd, (int *)rq->ifr_data);
+       if (get_user(cmd, (int *)rq->ifr_data)) {
+           ret = -EFAULT;
+           goto ioctl_done;
+       }
         userdata = (char *)(((unsigned int *)rq->ifr_data)+1);
         if(is_xioctl_allowed(ar->arNextMode, cmd) != A_OK) {
             A_PRINTF("xioctl: cmd=%d not allowed in this mode\n",cmd);
@@ -2094,8 +2097,12 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
             break;
 
         case AR6000_XIOCTL_BMI_READ_MEMORY:
-            get_user(address, (unsigned int *)userdata);
-            get_user(length, (unsigned int *)userdata + 1);
+            if (get_user(address, (unsigned int *)userdata) ||
+               get_user(length, (unsigned int *)userdata + 1)) {
+               ret = -EFAULT;
+               break;
+           }
+
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("Read Memory (address: 0x%x, length: %d)\n",
                              address, length));
             if ((buffer = (unsigned char *)A_MALLOC(length)) != NULL) {
@@ -2111,8 +2118,11 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
             break;
 
         case AR6000_XIOCTL_BMI_WRITE_MEMORY:
-            get_user(address, (unsigned int *)userdata);
-            get_user(length, (unsigned int *)userdata + 1);
+            if (get_user(address, (unsigned int *)userdata) ||
+               get_user(length, (unsigned int *)userdata + 1)) {
+               ret = -EFAULT;
+               break;
+           }
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("Write Memory (address: 0x%x, length: %d)\n",
                              address, length));
             if ((buffer = (unsigned char *)A_MALLOC(length)) != NULL) {
@@ -2136,29 +2146,49 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
            break;
 
         case AR6000_XIOCTL_BMI_EXECUTE:
-            get_user(address, (unsigned int *)userdata);
-            get_user(param, (unsigned int *)userdata + 1);
+            if (get_user(address, (unsigned int *)userdata) ||
+               get_user(param, (unsigned int *)userdata + 1)) {
+               ret = -EFAULT;
+               break;
+           }
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("Execute (address: 0x%x, param: %d)\n",
                              address, param));
             ret = BMIExecute(hifDevice, address, (A_UINT32*)&param);
-            put_user(param, (unsigned int *)rq->ifr_data); /* return value */
+           /* return value */
+           if (put_user(param, (unsigned int *)rq->ifr_data)) {
+               ret = -EFAULT;
+               break;
+           }
             break;
 
         case AR6000_XIOCTL_BMI_SET_APP_START:
-            get_user(address, (unsigned int *)userdata);
+           if (get_user(address, (unsigned int *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("Set App Start (address: 0x%x)\n", address));
             ret = BMISetAppStart(hifDevice, address);
             break;
 
         case AR6000_XIOCTL_BMI_READ_SOC_REGISTER:
-            get_user(address, (unsigned int *)userdata);
+           if (get_user(address, (unsigned int *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             ret = BMIReadSOCRegister(hifDevice, address, (A_UINT32*)&param);
-            put_user(param, (unsigned int *)rq->ifr_data); /* return value */
+           /* return value */
+           if (put_user(param, (unsigned int *)rq->ifr_data)) {
+               ret = -EFAULT;
+               break;
+           }
             break;
 
         case AR6000_XIOCTL_BMI_WRITE_SOC_REGISTER:
-            get_user(address, (unsigned int *)userdata);
-            get_user(param, (unsigned int *)userdata + 1);
+           if (get_user(address, (unsigned int *)userdata) ||
+               get_user(param, (unsigned int *)userdata + 1)) {
+               ret = -EFAULT;
+               break;
+           }
             ret = BMIWriteSOCRegister(hifDevice, address, param);
             break;
 
@@ -2196,12 +2226,18 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         case AR6000_XIOCTL_HTC_RAW_READ:
             if (arRawIfEnabled(ar)) {
                 unsigned int streamID;
-                get_user(streamID, (unsigned int *)userdata);
-                get_user(length, (unsigned int *)userdata + 1);
+               if (get_user(streamID, (unsigned int *)userdata) ||
+                   get_user(length, (unsigned int *)userdata + 1)) {
+                   ret = -EFAULT;
+                   break;
+               }
                 buffer = (unsigned char*)rq->ifr_data + sizeof(length);
                 ret = ar6000_htc_raw_read(ar, (HTC_RAW_STREAM_ID)streamID,
                                           (char*)buffer, length);
-                put_user(ret, (unsigned int *)rq->ifr_data);
+               if (put_user(ret, (unsigned int *)rq->ifr_data)) {
+                   ret = -EFAULT;
+                   break;
+               }
             } else {
                 ret = A_ERROR;
             }
@@ -2210,12 +2246,18 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         case AR6000_XIOCTL_HTC_RAW_WRITE:
             if (arRawIfEnabled(ar)) {
                 unsigned int streamID;
-                get_user(streamID, (unsigned int *)userdata);
-                get_user(length, (unsigned int *)userdata + 1);
+               if (get_user(streamID, (unsigned int *)userdata) ||
+                   get_user(length, (unsigned int *)userdata + 1)) {
+                   ret = -EFAULT;
+                   break;
+               }
                 buffer = (unsigned char*)userdata + sizeof(streamID) + sizeof(length);
                 ret = ar6000_htc_raw_write(ar, (HTC_RAW_STREAM_ID)streamID,
                                            (char*)buffer, length);
-                put_user(ret, (unsigned int *)rq->ifr_data);
+               if (put_user(ret, (unsigned int *)rq->ifr_data)) {
+                   ret = -EFAULT;
+                   break;
+               }
             } else {
                 ret = A_ERROR;
             }
@@ -2223,13 +2265,19 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 #endif /* HTC_RAW_INTERFACE */
 
         case AR6000_XIOCTL_BMI_LZ_STREAM_START:
-            get_user(address, (unsigned int *)userdata);
+           if (get_user(address, (unsigned int *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("Start Compressed Stream (address: 0x%x)\n", address));
             ret = BMILZStreamStart(hifDevice, address);
             break;
 
         case AR6000_XIOCTL_BMI_LZ_DATA:
-            get_user(length, (unsigned int *)userdata);
+           if (get_user(length, (unsigned int *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("Send Compressed Data (length: %d)\n", length));
             if ((buffer = (unsigned char *)A_MALLOC(length)) != NULL) {
                 A_MEMZERO(buffer, length);
@@ -2256,8 +2304,11 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         {
             A_UINT32 period;
             A_UINT32 nbins;
-            get_user(period, (unsigned int *)userdata);
-            get_user(nbins, (unsigned int *)userdata + 1);
+           if (get_user(period, (unsigned int *)userdata) ||
+               get_user(nbins, (unsigned int *)userdata + 1)) {
+               ret = -EFAULT;
+               break;
+           }
 
             if (wmi_prof_cfg_cmd(ar->arWmi, period, nbins) != A_OK) {
                 ret = -EIO;
@@ -2270,7 +2321,10 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         case AR6000_XIOCTL_PROF_ADDR_SET:
         {
             A_UINT32 addr;
-            get_user(addr, (unsigned int *)userdata);
+           if (get_user(addr, (unsigned int *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
 
             if (wmi_prof_addr_set_cmd(ar->arWmi, addr) != A_OK) {
                 ret = -EIO;
@@ -2656,30 +2710,29 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 
             if (ar->arWmiReady == FALSE) {
                 ret = -EIO;
-            } else {
-                get_user(cmd.ieType, userdata);
-                if (cmd.ieType >= WMI_MAX_ASSOC_INFO_TYPE) {
-                    ret = -EIO;
-                } else {
-                    get_user(cmd.bufferSize, userdata + 1);
-                    if (cmd.bufferSize > WMI_MAX_ASSOC_INFO_LEN) {
-                        ret = -EFAULT;
-                        break;
-                    }
-                    if (copy_from_user(assocInfo, userdata + 2,
-                                       cmd.bufferSize))
-                    {
-                        ret = -EFAULT;
-                    } else {
-                        if (wmi_associnfo_cmd(ar->arWmi, cmd.ieType,
-                                                 cmd.bufferSize,
-                                                 assocInfo) != A_OK)
-                        {
-                            ret = -EIO;
-                        }
-                    }
-                }
-            }
+               break;
+           }
+
+           if (get_user(cmd.ieType, userdata))
+               ret = -EFAULT;
+               break;
+           }
+           if (cmd.ieType >= WMI_MAX_ASSOC_INFO_TYPE) {
+               ret = -EIO;
+               break;
+           }
+
+           if (get_user(cmd.bufferSize, userdata + 1) ||
+               (cmd.bufferSize > WMI_MAX_ASSOC_INFO_LEN) ||
+               copy_from_user(assocInfo, userdata + 2, cmd.bufferSize)) {
+               ret = -EFAULT;
+               break;
+           }
+           if (wmi_associnfo_cmd(ar->arWmi, cmd.ieType,
+                                 cmd.bufferSize, assocInfo) != A_OK) {
+               ret = -EIO;
+               break;
+           }
             break;
         }
         case AR6000_IOCTL_WMI_SET_ACCESS_PARAMS:
@@ -3212,10 +3265,10 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         case AR6000_XIOCTRL_WMI_SET_WLAN_STATE:
         {
             AR6000_WLAN_STATE state;
-            get_user(state, (unsigned int *)userdata);
-            if (ar6000_set_wlan_state(ar, state)!=A_OK) {
+           if (get_user(state, (unsigned int *)userdata))
+               ret = -EFAULT;
+           else if (ar6000_set_wlan_state(ar, state) != A_OK)
                 ret = -EIO;
-            }       
             break;
         }
         case AR6000_XIOCTL_WMI_GET_ROAM_DATA:
@@ -3426,19 +3479,28 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         case AR6000_XIOCTL_DIAG_READ:
         {
             A_UINT32 addr, data;
-            get_user(addr, (unsigned int *)userdata);
+           if (get_user(addr, (unsigned int *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             addr = TARG_VTOP(ar->arTargetType, addr);
             if (ar6000_ReadRegDiag(ar->arHifDevice, &addr, &data) != A_OK) {
                 ret = -EIO;
             }
-            put_user(data, (unsigned int *)userdata + 1);
+           if (put_user(data, (unsigned int *)userdata + 1)) {
+               ret = -EFAULT;
+               break;
+           }
             break;
         }
         case AR6000_XIOCTL_DIAG_WRITE:
         {
             A_UINT32 addr, data;
-            get_user(addr, (unsigned int *)userdata);
-            get_user(data, (unsigned int *)userdata + 1);
+           if (get_user(addr, (unsigned int *)userdata) ||
+               get_user(data, (unsigned int *)userdata + 1)) {
+               ret = -EFAULT;
+               break;
+           }
             addr = TARG_VTOP(ar->arTargetType, addr);
             if (ar6000_WriteRegDiag(ar->arHifDevice, &addr, &data) != A_OK) {
                 ret = -EIO;
@@ -3592,12 +3654,18 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
                 ret = -EIO;
                 goto ioctl_done;
             }
-            get_user(fType, (A_UINT32 *)userdata);
+           if (get_user(fType, (A_UINT32 *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             appIEcmd.mgmtFrmType = fType;
             if (appIEcmd.mgmtFrmType >= IEEE80211_APPIE_NUM_OF_FRAME) {
                 ret = -EIO;
             } else {
-                get_user(ieLen, (A_UINT32 *)(userdata + 4));
+               if (get_user(ieLen, (A_UINT32 *)(userdata + 4))) {
+                   ret = -EFAULT;
+                   break;
+               }
                 appIEcmd.ieLen = ieLen;
                 A_PRINTF("WPSIE: Type-%d, Len-%d\n",appIEcmd.mgmtFrmType, appIEcmd.ieLen);
                 if (appIEcmd.ieLen > IEEE80211_APPIE_FRAME_MAX_LEN) {
@@ -3669,16 +3737,23 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
             A_UINT32 do_activate;
             A_UINT32 rompatch_id;
 
-            get_user(ROM_addr, (A_UINT32 *)userdata);
-            get_user(RAM_addr, (A_UINT32 *)userdata + 1);
-            get_user(nbytes, (A_UINT32 *)userdata + 2);
-            get_user(do_activate, (A_UINT32 *)userdata + 3);
+           if (get_user(ROM_addr, (A_UINT32 *)userdata) ||
+               get_user(RAM_addr, (A_UINT32 *)userdata + 1) ||
+               get_user(nbytes, (A_UINT32 *)userdata + 2) ||
+               get_user(do_activate, (A_UINT32 *)userdata + 3)) {
+               ret = -EFAULT;
+               break;
+           }
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("Install rompatch from ROM: 0x%x to RAM: 0x%x  length: %d\n",
                              ROM_addr, RAM_addr, nbytes));
             ret = BMIrompatchInstall(hifDevice, ROM_addr, RAM_addr,
                                         nbytes, do_activate, &rompatch_id);
             if (ret == A_OK) {
-                put_user(rompatch_id, (unsigned int *)rq->ifr_data); /* return value */
+               /* return value */
+               if (put_user(rompatch_id, (unsigned int *)rq->ifr_data)) {
+                   ret = -EFAULT;
+                   break;
+               }
             }
             break;
         }
@@ -3687,7 +3762,10 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         {
             A_UINT32 rompatch_id;
 
-            get_user(rompatch_id, (A_UINT32 *)userdata);
+           if (get_user(rompatch_id, (A_UINT32 *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("UNinstall rompatch_id %d\n", rompatch_id));
             ret = BMIrompatchUninstall(hifDevice, rompatch_id);
             break;
@@ -3698,7 +3776,10 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         {
             A_UINT32 rompatch_count;
 
-            get_user(rompatch_count, (A_UINT32 *)userdata);
+           if (get_user(rompatch_count, (A_UINT32 *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,("Change rompatch activation count=%d\n", rompatch_count));
             length = sizeof(A_UINT32) * rompatch_count;
             if ((buffer = (unsigned char *)A_MALLOC(length)) != NULL) {
@@ -4522,7 +4603,10 @@ int ar6000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
         case AR6000_XIOCTL_SET_BT_HW_POWER_STATE:
         {
             unsigned int state;
-            get_user(state, (unsigned int *)userdata);
+           if (get_user(state, (unsigned int *)userdata)) {
+               ret = -EFAULT;
+               break;
+           }
             if (ar6000_set_bt_hw_state(ar, state)!=A_OK) {
                 ret = -EIO;
             }