Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu, Jun 28, 2018 at 01:42:52AM +0200, Ard Biesheuvel wrote: > But what point is there to letting LSMs decide that they do not trust > an I/O device if there is nothing we can do about it? How can we > prevent such an I/O device from modifying our memory? Simply LSMs can opt to not trust such

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 28 June 2018 at 01:33, Luis R. Rodriguez wrote: > On Thu, Jun 28, 2018 at 12:21:47AM +0200, Ard Biesheuvel wrote: >> On 27 June 2018 at 20:00, Luis R. Rodriguez wrote: >> > On Mon, Jun 25, 2018 at 05:08:08PM -0700, Bjorn Andersson wrote: >> >> On Thu 07 Jun 11:42 PDT 2018, Ard Biesheuvel

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu, Jun 28, 2018 at 12:21:47AM +0200, Ard Biesheuvel wrote: > On 27 June 2018 at 20:00, Luis R. Rodriguez wrote: > > On Mon, Jun 25, 2018 at 05:08:08PM -0700, Bjorn Andersson wrote: > >> On Thu 07 Jun 11:42 PDT 2018, Ard Biesheuvel wrote: > >> > >> > On 7 June 2018 at 20:21, Bjorn Andersson

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 27 June 2018 at 20:00, Luis R. Rodriguez wrote: > On Mon, Jun 25, 2018 at 05:08:08PM -0700, Bjorn Andersson wrote: >> On Thu 07 Jun 11:42 PDT 2018, Ard Biesheuvel wrote: >> >> > On 7 June 2018 at 20:21, Bjorn Andersson >> > wrote: >> > > On Thu 07 Jun 09:33 PDT 2018, Greg Kroah-Hartman

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Mon, Jun 25, 2018 at 05:08:08PM -0700, Bjorn Andersson wrote: > On Thu 07 Jun 11:42 PDT 2018, Ard Biesheuvel wrote: > > > On 7 June 2018 at 20:21, Bjorn Andersson wrote: > > > On Thu 07 Jun 09:33 PDT 2018, Greg Kroah-Hartman wrote: > [..] > > >> > > >> Why not just use kmalloc, it will always

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu 07 Jun 11:42 PDT 2018, Ard Biesheuvel wrote: > On 7 June 2018 at 20:21, Bjorn Andersson wrote: > > On Thu 07 Jun 09:33 PDT 2018, Greg Kroah-Hartman wrote: [..] > >> > >> Why not just use kmalloc, it will always return a DMAable buffer. > >> > > > > For the buffers being targeted by

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu, Jun 07, 2018 at 11:06:11AM -0700, Bjorn Andersson wrote: > On Thu 07 Jun 09:23 PDT 2018, Ard Biesheuvel wrote: > > > On 7 June 2018 at 18:18, Bjorn Andersson wrote: > > > On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: > > > > > >> On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R.

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 06/07/2018 06:33 PM, Greg Kroah-Hartman wrote: > On Thu, Jun 07, 2018 at 06:23:01PM +0200, Ard Biesheuvel wrote: >> On 7 June 2018 at 18:18, Bjorn Andersson wrote: >>> On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: >>> On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 7 June 2018 at 20:21, Bjorn Andersson wrote: > On Thu 07 Jun 09:33 PDT 2018, Greg Kroah-Hartman wrote: > >> On Thu, Jun 07, 2018 at 06:23:01PM +0200, Ard Biesheuvel wrote: >> > On 7 June 2018 at 18:18, Bjorn Andersson >> > wrote: >> > > On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote:

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu 07 Jun 09:33 PDT 2018, Greg Kroah-Hartman wrote: > On Thu, Jun 07, 2018 at 06:23:01PM +0200, Ard Biesheuvel wrote: > > On 7 June 2018 at 18:18, Bjorn Andersson wrote: > > > On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: > > > > > >> On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu 07 Jun 09:23 PDT 2018, Ard Biesheuvel wrote: > On 7 June 2018 at 18:18, Bjorn Andersson wrote: > > On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: > > > >> On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: > >> > On Tue, May 08, 2018 at 03:38:05PM +, Luis R.

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 7 June 2018 at 18:49, Greg Kroah-Hartman wrote: > On Thu, Jun 07, 2018 at 06:43:05PM +0200, Ard Biesheuvel wrote: >> On 7 June 2018 at 18:33, Greg Kroah-Hartman >> wrote: >> > On Thu, Jun 07, 2018 at 06:23:01PM +0200, Ard Biesheuvel wrote: >> >> On 7 June 2018 at 18:18, Bjorn Andersson >>

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu, Jun 07, 2018 at 06:43:05PM +0200, Ard Biesheuvel wrote: > On 7 June 2018 at 18:33, Greg Kroah-Hartman > wrote: > > On Thu, Jun 07, 2018 at 06:23:01PM +0200, Ard Biesheuvel wrote: > >> On 7 June 2018 at 18:18, Bjorn Andersson > >> wrote: > >> > On Wed 06 Jun 13:32 PDT 2018, Luis R.

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 7 June 2018 at 18:33, Greg Kroah-Hartman wrote: > On Thu, Jun 07, 2018 at 06:23:01PM +0200, Ard Biesheuvel wrote: >> On 7 June 2018 at 18:18, Bjorn Andersson wrote: >> > On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: >> > >> >> On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R.

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu, Jun 07, 2018 at 06:23:01PM +0200, Ard Biesheuvel wrote: > On 7 June 2018 at 18:18, Bjorn Andersson wrote: > > On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: > > > >> On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: > >> > On Tue, May 08, 2018 at 03:38:05PM +,

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: > On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: > > On Tue, May 08, 2018 at 03:38:05PM +, Luis R. Rodriguez wrote: > > > On Fri, May 04, 2018 at 12:44:37PM -0700, Martijn Coenen wrote: > > > > > > > > I think the

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 7 June 2018 at 18:18, Bjorn Andersson wrote: > On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: > >> On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: >> > On Tue, May 08, 2018 at 03:38:05PM +, Luis R. Rodriguez wrote: >> > > On Fri, May 04, 2018 at 12:44:37PM -0700,

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Thu, Jun 07, 2018 at 12:41:12AM +0200, Ard Biesheuvel wrote: > On 7 June 2018 at 00:29, Luis R. Rodriguez wrote: > > Given no one is providing a clear answer, and we cannot easily describe the > > buffer at run time we'll just move forward with > > READING_FIRMWARE_DMA_COHERENT. > > I

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 7 June 2018 at 00:29, Luis R. Rodriguez wrote: > On Wed, Jun 06, 2018 at 10:41:07PM +0200, Ard Biesheuvel wrote: >> On 6 June 2018 at 22:32, Luis R. Rodriguez wrote: >> > On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: >> >> On Tue, May 08, 2018 at 03:38:05PM +, Luis R.

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Wed, Jun 06, 2018 at 10:41:07PM +0200, Ard Biesheuvel wrote: > On 6 June 2018 at 22:32, Luis R. Rodriguez wrote: > > On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: > >> On Tue, May 08, 2018 at 03:38:05PM +, Luis R. Rodriguez wrote: > >> > On Fri, May 04, 2018 at

Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On 6 June 2018 at 22:32, Luis R. Rodriguez wrote: > On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: >> On Tue, May 08, 2018 at 03:38:05PM +, Luis R. Rodriguez wrote: >> > On Fri, May 04, 2018 at 12:44:37PM -0700, Martijn Coenen wrote: >> > > >> > > I think the Qualcomm

Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?

On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: > On Tue, May 08, 2018 at 03:38:05PM +, Luis R. Rodriguez wrote: > > On Fri, May 04, 2018 at 12:44:37PM -0700, Martijn Coenen wrote: > > > > > > I think the Qualcomm folks owning this (Andy, David, Bjorn, already > > > cc'd