Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

[lisovros/linux_canprio.git] / fs / btrfs / ioctl.c

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index e84ef60ffe35bc13830e78754c6698a135e7683c..97a97839a867f1c0773f8a684a1289ae185d0eb6 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1481,12 +1481,17 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
                ret = -EBADF;
                goto out_drop_write;
        }
+
        src = src_file->f_dentry->d_inode;
 
        ret = -EINVAL;
        if (src == inode)
                goto out_fput;
 
+       /* the src must be open for reading */
+       if (!(src_file->f_mode & FMODE_READ))
+               goto out_fput;
+
        ret = -EISDIR;
        if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode))
                goto out_fput;