lib/iov_iter: initialize "flags" in new pipe_buffer

commit 9d2231c5 upstream.

The functions copy_page_to_iter_pipe() and push_pipe() can both allocate a new pipe_buffer, but the "flags" member initializer is missing.

Fixes: 241699cd ("new iov_iter flavour: pipe-backed") To: Alexander Viro viro@zeniv.linux.org.uk To: linux-fsdevel@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: Max Kellermann max.kellermann@ionos.com Signed-off-by: Al Viro viro@zeniv.linux.org.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org