staging/lustre/llite: pass correct pointer to obd_iocontrol()

In copy_and_ioctl() use the kernel space copy as the karg to
obd_iocontrol().

Lustre-change: http://review.whamcloud.com/6274
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3283
Signed-off-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Sebastien Buisson <sebastien.buisson@bull.net>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index 22d0acc..1b217c8 100644 (file)
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -1048,20 +1048,25 @@ progress:
 }
 
 
-static int copy_and_ioctl(int cmd, struct obd_export *exp, void *data, int len)
+static int copy_and_ioctl(int cmd, struct obd_export *exp,
+                         const void __user *data, size_t size)
 {
-       void *ptr;
+       void *copy;
        int rc;
 
-       OBD_ALLOC(ptr, len);
-       if (ptr == NULL)
+       OBD_ALLOC(copy, size);
+       if (copy == NULL)
                return -ENOMEM;
-       if (copy_from_user(ptr, data, len)) {
-               OBD_FREE(ptr, len);
-               return -EFAULT;
+
+       if (copy_from_user(copy, data, size)) {
+               rc = -EFAULT;
+               goto out;
        }
-       rc = obd_iocontrol(cmd, exp, len, data, NULL);
-       OBD_FREE(ptr, len);
+
+       rc = obd_iocontrol(cmd, exp, size, copy, NULL);
+out:
+       OBD_FREE(copy, size);
+
        return rc;
 }