The controller is using non-standard "reset-n-io" name for its reset
gpio property, whereas gpiod API expects "<name>-gpios". Add a quirk
so that gpiod API will still work on unmodified DTSes.
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Some legacy mappings used "gpio[s]-reset" instead of "reset-gpios",
add a quirk so that gpiod API will still work on unmodified DTSes.
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Tighten selection of legacy gpio renaming quirks so that they only
considered on more relevant configurations.
Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This consolidates all quirks doing simple renames (either allowing
suffix-less names or trivial renames, when index changes are not
required) into a single quirk.
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The driver is using non-standard "i2s1-in-sel-gpio1" and
"i2s1-in-sel-gpio2" names to describe its gpios. In preparation to
converting to the standard naming (i2s1-in-sel-gpios) and switching the
driver to gpiod API add a quirk to gpiolib to keep compatibility with
existing DTSes.
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
In order to make it a proper module and disentangle it from facilities,
add a notifier for reporting memory errors. Use an atomic notifier
because calls sites like ghes_proc_in_irq() run in interrupt context.
[ bp: Massage commit message. ]
Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Jia He <justin.he@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20221010023559.69655-3-justin.he@arm.com
Before ghes_edac can be turned back into a proper module again, export
several helpers which are going to be used by it.
Signed-off-by: Jia He <justin.he@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20221010023559.69655-2-justin.he@arm.com
The test was constructed as a single function (test case) which checks
multiple conditions, calling the function that is tested multiple times
with different arguments.
This usually means that it can be easily converted into multiple test
cases.
Split igt_check_plane_state into two parameterized test cases,
drm_check_plane_state and drm_check_invalid_plane_state.
Passing output:
============================================================
============== drm_plane_helper (2 subtests) ===============
================== drm_check_plane_state ===================
[PASSED] clipping_simple
[PASSED] clipping_rotate_reflect
[PASSED] positioning_simple
[PASSED] upscaling
[PASSED] downscaling
[PASSED] rounding1
[PASSED] rounding2
[PASSED] rounding3
[PASSED] rounding4
============== [PASSED] drm_check_plane_state ==============
============== drm_check_invalid_plane_state ===============
[PASSED] positioning_invalid
[PASSED] upscaling_invalid
[PASSED] downscaling_invalid
========== [PASSED] drm_check_invalid_plane_state ==========
================ [PASSED] drm_plane_helper =================
============================================================
Testing complete. Ran 12 tests: passed: 12
v2: Add missing EXPECT/ASSERT (Maíra)
v3: Use single EXPECT insted of condition + KUNIT_FAILURE (Maíra)
v4: Rebase after "drm_test" rename
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Maíra Canal <mairacanal@riseup.net>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20221020082135.779872-2-michal.winiarski@intel.com
Currently the values are printed with debug log level.
Adjust the log level and link the output with the test by using kunit_err.
Example output:
foo: dst: 20x20+10+10, expected: 10x10+0+0
foo: EXPECTATION FAILED at drivers/gpu/drm/tests/drm_plane_helper_test.c:85
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Maíra Canal <mairacanal@riseup.net>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20221020082135.779872-1-michal.winiarski@intel.com
With the changes to the driver core to make more pointers const, the USB
subsystem also needs to be modified to take a const * for the devnode
callback so that the driver core's constant pointer will also be
properly propagated.
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Juergen Stuber <starblue@users.sourceforge.net>
Reviewed-by: Johan Hovold <johan@kernel.org>
Acked-by: Pete Zaitcev <zaitcev@redhat.com>
Reviewed-by: Jiri Kosina <jkosina@suse.cz>
Link: https://lore.kernel.org/r/20221001165128.2688526-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The functions to_usb_interface(), to_usb_device, and
interface_to_usbdev() sometimes would like to take a const * and return
a const * back. As we are doing pointer math, a call to container_of()
loses the const-ness of a pointer, so use a _Generic() macro to pick the
proper inline function to call instead.
Link: https://lore.kernel.org/r/20221016104155.1260201-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If a const * to a kobject is passed to kobj_to_dev(), we want to return
back a const * to a device as the driver core shouldn't be modifying a
constant structure. But when dealing with container_of() the pointer
const attribute is cast away, so we need to manually handle this by
determining the type of the pointer passed in to know the type of the
pointer to pass out.
Luckily _Generic can do this type of magic, and as the kernel now
supports C11 it is availble to us to handle this type of build-time type
detection.
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221016104126.1259809-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
__le32 and __le64 types aren't portable and are not available on
FreeBSD (which uses the same uAPI).
Instead of attempting to always output little endian, just use native
endianness in the dumps. Tools can detect the endianness in use by
looking at the 'magic' field, but equally we don't expect big-endian to
be used with Mali (there are no known implementations out there).
Bug: https://gitlab.freedesktop.org/mesa/mesa/-/issues/7252
Fixes: 730c2bf4ad ("drm/panfrost: Add support for devcoredump")
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221017104602.142992-3-steven.price@arm.com
The two structs internal to struct panfrost_dump_object_header were
named, but sadly that is incompatible with C++, causing an error: "an
anonymous union may only have public non-static data members".
However nothing refers to struct pan_reg_hdr and struct pan_bomap_hdr
and there's no need to export these definitions, so lets drop them. This
fixes the C++ build error with the minimum change in userspace API.
Reported-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Fixes: 730c2bf4ad ("drm/panfrost: Add support for devcoredump")
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221017104602.142992-2-steven.price@arm.com
Marc Kleine-Budde <mkl@pengutronix.de> says:
this series targets the gs_us driver. First there are some cleanup
patches by me, followed by now 4 patches by Jeroen Hofstee's. These
patches are based on the venus-5.19.4-gsusb branch of his Linux
repository and add 2 new features (GS_CAN_FEATURE_GET_STATE,
GS_CAN_FEATURE_BERR_REPORTING) to the driver.
Changes since v2: https://lore.kernel.org/all/20221019213035.1607752-1-mkl@pengutronix.de
- 7/7: add missing endianness conversion
Changes since v1: https://lore.kernel.org/all/20221006162452.200322-1-mkl@pengutronix.de
- added Jeroen's S-o-b to patches 4...7
- split former "[PATCH 4/6] can: gs_usb: add ability to enable / disable berr rerporting"
into 2 patches, fix subject, update patch description
Changes since venus-5.19.4-gsusb: https://github.com/jhofstee/linux/tree/venus-5.19.4-gsusb
- fixed 2nd parameter of usb_control_msg_recv()
- rebased to current net-next/main
- renumbered the FEATURE, MODE and BREQ bits, as termination support
landed mainline first
- split GS_CAN_FEATURE_GET_STATE patch into documentation and
implementation part
- added Not-Signed-off-by: tag, as these patches are not Signed-off yet
Link: https://lore.kernel.org/all/20221019221016.1659260-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Add support for reading the device state and CAN error counters, using
the GS_USB_BREQ_GET_STATE control message, if supported by the device,
indicated by the GS_CAN_FEATURE_GET_STATE feature flag.
Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Link: https://lore.kernel.org/all/20221019221016.1659260-8-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Document the new feature ("GS_CAN_FEATURE_GET_STATE") that indicates
that the state of the CAN controller can be queried with the new
GS_USB_BREQ_GET_STATE control message.
Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Link: https://lore.kernel.org/all/20221019221016.1659260-7-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The open source firmware candleLight report bus errors
unconditionally. This adds support to enable / disable bus error
reporting with the standard netlink property.
Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Link: https://lore.kernel.org/all/20221019221016.1659260-6-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Document the new feature ("GS_CAN_FEATURE_BERR_REPORTING") that
indicates that the bus error reporting in the CAN controller can
switched on and off with the GS_CAN_MODE_BERR_REPORTING mode bit in
the GS_USB_BREQ_MODE control message.
Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Link: https://lore.kernel.org/all/20221019221016.1659260-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Sort the checks for dev->can.ctrlmode by values of CAN_CTRLMODE_*, so
that it's clear where to add new checks.
While there, remove the comment that the Atmel UC3C hardware doesn't
support One Shot Mode. The One Shot mode is only available and to be
activated by the user, if the device specifies the feature bit
GS_CAN_FEATURE_ONE_SHOT.
Link: https://lore.kernel.org/all/20221019221016.1659260-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
To make it easier for new users to find the correct driver for
candleLight compatible CAN-USB devices mention candleLight in the
driver's Kconfig input prompt.
Link: https://lore.kernel.org/all/20221019205037.1600936-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
When a frame in CAN FD format has reached the data phase, the next CAN
event (error or valid frame) will be shown in DLEC.
Utilize the dedicated flag (Data Phase Last Error Code: DLEC flag) to
determine the type of last error that occurred in the data phase of a
CAN-FD frame and handle the bus errors.
Signed-off-by: Vivek Yadav <vivek.2311@samsung.com>
Link: https://lore.kernel.org/all/20221018081934.1336690-1-mkl@pengutronix.de
Reviewed-by: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The PSR register contains among other the error for the CAN
arbitration phase (LEC bits) and CAN data phase (DLEC bits).
Prepare is_lec_err() to be called with the (D)LEC value only instead
of the whole PSR register. While there rename LEC_UNUSED to
LEC_NO_CHANGE to match the latest M_CAN reference manual.
Link: https://lore.kernel.org/all/20221019211611.1605764-1-mkl@pengutronix.de
Reviewed-by: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
CRC errors (code -84 EILSEQ) have been observed for some SanDisk
Ultra A1 cards when running at 50MHz.
Waveform analysis suggest that the level shifters that are used on the
RK3399-Q7 module for voltage translation between 3.0 and 3.3V don't
handle clock rates at or above 48MHz properly. Back off to 40MHz for
some safety margin.
Cc: stable@vger.kernel.org
Fixes: 60fd9f72ce ("arm64: dts: rockchip: add Haikou baseboard with RK3399-Q7 SoM")
Signed-off-by: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Link: https://lore.kernel.org/r/20221019-upstream-puma-sd-40mhz-v1-0-754a76421518@theobroma-systems.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Commit 35a3b82f1b ("drm/connector: Introduce drmm_connector_init")
introduced the function drmm_connector_init() with a parameter for an
optional ddc pointer to the i2c controller used to access the DDC bus.
However, the underlying call to __drm_connector_init() was always
setting it to NULL instead of passing the ddc argument around.
This resulted in unexpected null pointer dereference on platforms
expecting to get a DDC controller.
Fixes: 35a3b82f1b ("drm/connector: Introduce drmm_connector_init")
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20221019143442.1798964-1-maxime@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Instead of discovering the kmalloc bucket size _after_ allocation, round
up proactively so the allocation is explicitly made for the full size,
allowing the compiler to correctly reason about the resulting size of
the buffer through the existing __alloc_size() hint.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
Reviewed-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/lkml/4d75a9fd-1b94-7208-9de8-5a0102223e68@ieee.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221018092724.give.735-kees@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Now that the posix acl api is active we can remove all the hacky helpers
we had to keep around for all these years and also remove the set and
get posix acl xattr handler methods as they aren't needed anymore.
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Now that 9p supports the get and set acl inode operations and the vfs
has been switched to the new posi api, 9p can simply rely on the stub
posix acl handlers. The custom xattr handlers and associated unused
helpers can be removed.
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Now that cifs supports the get and set acl inode operations and the vfs
has been switched to the new posi api, cifs can simply rely on the stub
posix acl handlers. The custom xattr handlers and associated unused
helpers can be removed.
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Now that ovl supports the get and set acl inode operations and the vfs
has been switched to the new posi api, ovl can simply rely on the stub
posix acl handlers. The custom xattr handlers and associated unused
helpers can be removed.
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Now that ecryptfs supports the get and set acl inode operations and the
vfs has been switched to the new posi api, ecryptfs can simply rely on
the stub posix acl handlers.
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The security and integrity infrastructure has dedicated hooks now so
evm_xattr_acl_change() is dead code. Before this commit the callchain was:
evm_protect_xattr()
-> evm_xattr_change()
-> evm_xattr_acl_change()
where evm_protect_xattr() was hit from evm_inode_setxattr() and
evm_inode_removexattr(). But now we have evm_inode_set_acl() and
evm_inode_remove_acl() and have switched over the vfs to rely on the posix
acl api so the code isn't hit anymore.
Suggested-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
In previous patches we built a new posix api solely around get and set
inode operations. Now that we have all the pieces in place we can switch
the system calls and the vfs over to only rely on this api when
interacting with posix acls. This finally removes all type unsafety and
type conversion issues explained in detail in [1] that we aim to get rid
of.
With the new posix acl api we immediately translate into an appropriate
kernel internal struct posix_acl format both when getting and setting
posix acls. This is a stark contrast to before were we hacked unsafe raw
values into the uapi struct that was stored in a void pointer relying
and having filesystems and security modules hack around in the uapi
struct as well.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Now that posix acls have a proper api us it to copy them.
All filesystems that can serve as lower or upper layers for overlayfs
have gained support for the new posix acl api in previous patches.
So switch all internal overlayfs codepaths for copying posix acls to the
new posix acl api.
Acked-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
In order to build a type safe posix api around get and set acl we need
all filesystem to implement get and set acl.
Now that we have added get and set acl inode operations that allow easy
access to the dentry we give overlayfs it's own get and set acl inode
operations.
The set acl inode operation is duplicates most of the ovl posix acl
xattr handler. The main difference being that the set acl inode
operation relies on the new posix acl api. Once the vfs has been
switched over the custom posix acl xattr handler will be removed
completely.
Note, until the vfs has been switched to the new posix acl api this
patch is a non-functional change.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Acked-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
In order to build a type safe posix api around get and set acl we need
all filesystem to implement get and set acl.
Now that we have added get and set acl inode operations that allow easy
access to the dentry we give overlayfs it's own get and set acl inode
operations.
Since overlayfs is a stacking filesystem it will use the newly added
posix acl api when retrieving posix acls from the relevant layer.
Since overlayfs can also be mounted on top of idmapped layers. If
idmapped layers are used overlayfs must take the layer's idmapping into
account after it retrieved the posix acls from the relevant layer.
Note, until the vfs has been switched to the new posix acl api this
patch is a non-functional change.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
In order to build a type safe posix api around get and set acl we need
all filesystem to implement get and set acl.
So far ecryptfs didn't implement get and set acl inode operations
because it wanted easy access to the dentry. Now that we extended the
set acl inode operation to take a dentry argument and added a new get
acl inode operation that takes a dentry argument we can let ecryptfs
implement get and set acl inode operations.
Note, until the vfs has been switched to the new posix acl api this
patch is a non-functional change.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
In order to build a type safe posix api around get and set acl we need
all filesystem to implement get and set acl.
So far ecryptfs didn't implement get and set acl inode operations
because it wanted easy access to the dentry. Now that we extended the
set acl inode operation to take a dentry argument and added a new get
acl inode operation that takes a dentry argument we can let ecryptfs
implement get and set acl inode operations.
Note, until the vfs has been switched to the new posix acl api this
patch is a non-functional change.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
Now that we've switched all filesystems that can serve as the lower
filesystem for ksmbd we can switch ksmbd over to rely on
the posix acl api. Note that this is orthogonal to switching the vfs
itself over.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
In previous patches we implemented get and set inode operations for all
non-stacking filesystems that support posix acls but didn't yet
implement get and/or set acl inode operations. This specifically
affected cifs and 9p.
Now we can build a posix acl api based solely on get and set inode
operations. We add a new vfs_remove_acl() api that can be used to set
posix acls. This finally removes all type unsafety and type conversion
issues explained in detail in [1] that we aim to get rid of.
After we finished building the vfs api we can switch stacking
filesystems to rely on the new posix api and then finally switch the
xattr system calls themselves to rely on the posix acl api.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
In previous patches we implemented get and set inode operations for all
non-stacking filesystems that support posix acls but didn't yet
implement get and/or set acl inode operations. This specifically
affected cifs and 9p.
Now we can build a posix acl api based solely on get and set inode
operations. We add a new vfs_get_acl() api that can be used to get posix
acls. This finally removes all type unsafety and type conversion issues
explained in detail in [1] that we aim to get rid of.
After we finished building the vfs api we can switch stacking
filesystems to rely on the new posix api and then finally switch the
xattr system calls themselves to rely on the posix acl api.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
In previous patches we implemented get and set inode operations for all
non-stacking filesystems that support posix acls but didn't yet
implement get and/or set acl inode operations. This specifically
affected cifs and 9p.
Now we can build a posix acl api based solely on get and set inode
operations. We add a new vfs_set_acl() api that can be used to set posix
acls. This finally removes all type unsafety and type conversion issues
explained in detail in [1] that we aim to get rid of.
After we finished building the vfs api we can switch stacking
filesystems to rely on the new posix api and then finally switch the
xattr system calls themselves to rely on the posix acl api.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Split out the generic checks whether an inode allows writing xattrs. Since
security.* and system.* xattrs don't have any restrictions and we're going
to split out posix acls into a dedicated api we will use this helper to
check whether we can write posix acls.
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The security_inode_post_setxattr() hook is used by security modules to
update their own security.* xattrs. Consequently none of the security
modules operate on posix acls. So we don't need an additional security
hook when post setting posix acls.
However, the integrity subsystem wants to be informed about posix acl
changes in order to reset the EVM status flag.
-> evm_inode_post_setxattr()
-> evm_update_evmxattr()
-> evm_calc_hmac()
-> evm_calc_hmac_or_hash()
and evm_cacl_hmac_or_hash() walks the global list of protected xattr
names evm_config_xattrnames. This global list can be modified via
/sys/security/integrity/evm/evm_xattrs. The write to "evm_xattrs" is
restricted to security.* xattrs and the default xattrs in
evm_config_xattrnames only contains security.* xattrs as well.
So the actual value for posix acls is currently completely irrelevant
for evm during evm_inode_post_setxattr() and frankly it should stay that
way in the future to not cause the vfs any more headaches. But if the
actual posix acl values matter then evm shouldn't operate on the binary
void blob and try to hack around in the uapi struct anyway. Instead it
should then in the future add a dedicated hook which takes a struct
posix_acl argument passing the posix acls in the proper vfs format.
For now it is sufficient to make evm_inode_post_set_acl() a wrapper
around evm_inode_post_setxattr() not passing any actual values down.
This will cause the hashes to be updated as before.
Reviewed-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
So far posix acls were passed as a void blob to the security and
integrity modules. Some of them like evm then proceed to interpret the
void pointer and convert it into the kernel internal struct posix acl
representation to perform their integrity checking magic. This is
obviously pretty problematic as that requires knowledge that only the
vfs is guaranteed to have and has lead to various bugs. Add a proper
security hook for setting posix acls and pass down the posix acls in
their appropriate vfs format instead of hacking it through a void
pointer stored in the uapi format.
I spent considerate time in the security module and integrity
infrastructure and audited all codepaths. EVM is the only part that
really has restrictions based on the actual posix acl values passed
through it (e.g., i_mode). Before this dedicated hook EVM used to translate
from the uapi posix acl format sent to it in the form of a void pointer
into the vfs format. This is not a good thing. Instead of hacking around in
the uapi struct give EVM the posix acls in the appropriate vfs format and
perform sane permissions checks that mirror what it used to to in the
generic xattr hook.
IMA doesn't have any restrictions on posix acls. When posix acls are
changed it just wants to update its appraisal status to trigger an EVM
revalidation.
The removal of posix acls is equivalent to passing NULL to the posix set
acl hooks. This is the same as before through the generic xattr api.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Acked-by: Paul Moore <paul@paul-moore.com> (LSM)
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
So far posix acls were passed as a void blob to the security and
integrity modules. Some of them like evm then proceed to interpret the
void pointer and convert it into the kernel internal struct posix acl
representation to perform their integrity checking magic. This is
obviously pretty problematic as that requires knowledge that only the
vfs is guaranteed to have and has lead to various bugs. Add a proper
security hook for setting posix acls and pass down the posix acls in
their appropriate vfs format instead of hacking it through a void
pointer stored in the uapi format.
I spent considerate time in the security module infrastructure and
audited all codepaths. Smack has no restrictions based on the posix
acl values passed through it. The capability hook doesn't need to be
called either because it only has restrictions on security.* xattrs. So
these all becomes very simple hooks for smack.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Reviewed-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
