cpqarray: check put_user() result

put_user() may fail, if so return -EFAULT.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Acked-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 9473215956f9..d53b0291c44b 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -1179,7 +1179,8 @@ out_passthru:
                 return error;
         case IDAGETCTLRSIG:
                 if (!arg) return -EINVAL;
-                put_user(host->ctlr_sig, (int __user *)arg);
+                if (put_user(host->ctlr_sig, (int __user *)arg))
+                        return -EFAULT;
                 return 0;
         case IDAREVALIDATEVOLS:
                 if (MINOR(bdev->bd_dev) != 0)
@@ -1187,7 +1188,8 @@ out_passthru:
                 return revalidate_allvol(host);
         case IDADRIVERVERSION:
                 if (!arg) return -EINVAL;
-                put_user(DRIVER_VERSION, (unsigned long __user *)arg);
+                if (put_user(DRIVER_VERSION, (unsigned long __user *)arg))
+                        return -EFAULT;
                 return 0;
         case IDAGETPCIINFO:
         {