1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 653d4dcbee23..8f161743e18f 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2942,6 +2942,8 @@ static int get_array_info(mddev_t * mddev, void __user * arg)
         info.ctime         = mddev->ctime;
         info.level         = mddev->level;
         info.size          = mddev->size;
+        if (info.size != mddev->size) /* overflow */
+                info.size = -1;
         info.nr_disks      = nr;
         info.raid_disks    = mddev->raid_disks;
         info.md_minor      = mddev->md_minor;
@@ -3523,7 +3525,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
                 )
                 return -EINVAL;
         /* Check there is only one change */
-        if (mddev->size != info->size) cnt++;
+        if (info->size >= 0 && mddev->size != info->size) cnt++;
         if (mddev->raid_disks != info->raid_disks) cnt++;
         if (mddev->layout != info->layout) cnt++;
         if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) cnt++;
@@ -3540,7 +3542,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
                 else
                         return mddev->pers->reconfig(mddev, info->layout, -1);
         }
-        if (mddev->size != info->size)
+        if (info->size >= 0 && mddev->size != info->size)
                 rv = update_size(mddev, info->size);
 
         if (mddev->raid_disks    != info->raid_disks)