1 files changed, 9 insertions, 1 deletions

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 0f2252ec274d..3d5de16f028f 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -532,9 +532,17 @@ group_add_out:
         }
 
         case EXT4_IOC_SWAP_BOOT:
+        {
+                int err;
                 if (!(filp->f_mode & FMODE_WRITE))
                         return -EBADF;
-                return swap_inode_boot_loader(sb, inode);
+                err = mnt_want_write_file(filp);
+                if (err)
+                        return err;
+                err = swap_inode_boot_loader(sb, inode);
+                mnt_drop_write_file(filp);
+                return err;
+        }
 
         case EXT4_IOC_RESIZE_FS: {
                 ext4_fsblk_t n_blocks_count;