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-rw-r--r--fs/btrfs/ioctl.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index e84ef60..97a9783 100644
--- 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;
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