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2018-04-09platform/chrome: chromeos_laptop - introduce pr_fmt()Dmitry Torokhov1-17/+14
Define pr_fmt() to standardize driver messages. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - stop setting suspend mode for Atmel devicesDmitry Torokhov1-2/+0
Atmel touch controller driver no longer respects suspend mode specified in platform data, so let's stop setting it. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - add SPDX identifierDmitry Torokhov1-22/+5
Replace the original license statement with the SPDX identifier. Add also one line of description as recommended by the COPYING file. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09Input: atmel_mxt_ts - switch ChromeOS ACPI devices to generic propsDmitry Torokhov1-23/+40
Move older ChromeOS devices describing Atmel controllers in ACPI, but not providing enough details to configure the controllers properly, from platform data over to generic device properties. This will allow us remove support for platform data later on, leaving only generic device properties in place. Acked-by: Nick Dyer <nick@shmanahar.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09Input: atmel_mxt_ts - switch from OF to generic device propertiesDmitry Torokhov1-29/+30
Instead of using OF-specific APIs to fecth device properties, let's switch to generic device properties API. This will allow us to use device properties on legacy ChromeOS devices and get rid of platform data down the road. Acked-by: Nick Dyer <nick@shmanahar.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09Input: atmel_mxt_ts - do not pass suspend mode in platform dataDmitry Torokhov1-5/+22
The way we are supposed to put controller to sleep and wake it up does not depend on the platform, but rather on controller itself, so we want to get rid of suspend mode in platform data (and eventually get rid of platform data completely). Unfortunately some early chromebooks (the original Pixel, Acer C720) were shipped with config that requires manually re-enabling touch reporting in T9. We will sort it out, but in the meantime let's switch to a simple DMI quirk. We'll keep pdata->suspend_mode for now and remove it when we rework chromeos-laptop driver. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-03-25Linux 4.16-rc7Linus Torvalds1-1/+1
2018-03-25tty: vt: fix up tabstops properlyLinus Torvalds1-4/+4
Tabs on a console with long lines do not wrap properly, so correctly account for the line length when computing the tab placement location. Reported-by: James Holderness <j4_james@hotmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-24Revert "mqueue: switch to on-demand creation of internal mount"Eric W. Biederman1-55/+19
This reverts commit 36735a6a2b5e042db1af956ce4bcc13f3ff99e21. Aleksa Sarai <asarai@suse.de> writes: > [REGRESSION v4.16-rc6] [PATCH] mqueue: forbid unprivileged user access to internal mount > > Felix reported weird behaviour on 4.16.0-rc6 with regards to mqueue[1], > which was introduced by 36735a6a2b5e ("mqueue: switch to on-demand > creation of internal mount"). > > Basically, the reproducer boils down to being able to mount mqueue if > you create a new user namespace, even if you don't unshare the IPC > namespace. > > Previously this was not possible, and you would get an -EPERM. The mount > is the *host* mqueue mount, which is being cached and just returned from > mqueue_mount(). To be honest, I'm not sure if this is safe or not (or if > it was intentional -- since I'm not familiar with mqueue). > > To me it looks like there is a missing permission check. I've included a > patch below that I've compile-tested, and should block the above case. > Can someone please tell me if I'm missing something? Is this actually > safe? > > [1]: https://github.com/docker/docker/issues/36674 The issue is a lot deeper than a missing permission check. sb->s_user_ns was is improperly set as well. So in addition to the filesystem being mounted when it should not be mounted, so things are not allow that should be. We are practically to the release of 4.16 and there is no agreement between Al Viro and myself on what the code should looks like to fix things properly. So revert the code to what it was before so that we can take our time and discuss this properly. Fixes: 36735a6a2b5e ("mqueue: switch to on-demand creation of internal mount") Reported-by: Felix Abecassis <fabecassis@nvidia.com> Reported-by: Aleksa Sarai <asarai@suse.de> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-03-23x86/entry/64: Don't use IST entry for #BP stackAndy Lutomirski3-10/+9
There's nothing IST-worthy about #BP/int3. We don't allow kprobes in the small handful of places in the kernel that run at CPL0 with an invalid stack, and 32-bit kernels have used normal interrupt gates for #BP forever. Furthermore, we don't allow kprobes in places that have usergs while in kernel mode, so "paranoid" is also unnecessary. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org
2018-03-23x86/efi: Free efi_pgd with free_pages()Waiman Long1-1/+1
The efi_pgd is allocated as PGD_ALLOCATION_ORDER pages and therefore must also be freed as PGD_ALLOCATION_ORDER pages with free_pages(). Fixes: d9e9a6418065 ("x86/mm/pti: Allocate a separate user PGD") Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/1521746333-19593-1-git-send-email-longman@redhat.com