1 files changed, 3 insertions, 2 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index c3cdde87cc8c..08ae99343d92 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -249,7 +249,8 @@ struct super_block *freeze_bdev(struct block_device *bdev)
                  * thaw_bdev drops it.
                  */
                 sb = get_super(bdev);
-                drop_super(sb);
+                if (sb)
+                        drop_super(sb);
                 mutex_unlock(&bdev->bd_fsfreeze_mutex);
                 return sb;
         }
@@ -646,7 +647,7 @@ static struct dentry *bd_mount(struct file_system_type *fs_type,
 {
         struct dentry *dent;
         dent = mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, BDEVFS_MAGIC);
-        if (dent)
+        if (!IS_ERR(dent))
                 dent->d_sb->s_iflags |= SB_I_CGROUPWB;
         return dent;
 }