This reverts commit 1815d9c86e.
Unfortunately this inverts the locking hierarchy, so back to the
drawing board. Full lockdep splat below:
======================================================
WARNING: possible circular locking dependency detected
5.13.0-rc7-CI-CI_DRM_10254+ #1 Not tainted
------------------------------------------------------
kms_frontbuffer/1087 is trying to acquire lock:
ffff88810dcd01a8 (&dev->master_mutex){+.+.}-{3:3}, at: drm_is_current_master+0x1b/0x40
but task is already holding lock:
ffff88810dcd0488 (&dev->mode_config.mutex){+.+.}-{3:3}, at: drm_mode_getconnector+0x1c6/0x4a0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&dev->mode_config.mutex){+.+.}-{3:3}:
__mutex_lock+0xab/0x970
drm_client_modeset_probe+0x22e/0xca0
__drm_fb_helper_initial_config_and_unlock+0x42/0x540
intel_fbdev_initial_config+0xf/0x20 [i915]
async_run_entry_fn+0x28/0x130
process_one_work+0x26d/0x5c0
worker_thread+0x37/0x380
kthread+0x144/0x170
ret_from_fork+0x1f/0x30
-> #1 (&client->modeset_mutex){+.+.}-{3:3}:
__mutex_lock+0xab/0x970
drm_client_modeset_commit_locked+0x1c/0x180
drm_client_modeset_commit+0x1c/0x40
__drm_fb_helper_restore_fbdev_mode_unlocked+0x88/0xb0
drm_fb_helper_set_par+0x34/0x40
intel_fbdev_set_par+0x11/0x40 [i915]
fbcon_init+0x270/0x4f0
visual_init+0xc6/0x130
do_bind_con_driver+0x1e5/0x2d0
do_take_over_console+0x10e/0x180
do_fbcon_takeover+0x53/0xb0
register_framebuffer+0x22d/0x310
__drm_fb_helper_initial_config_and_unlock+0x36c/0x540
intel_fbdev_initial_config+0xf/0x20 [i915]
async_run_entry_fn+0x28/0x130
process_one_work+0x26d/0x5c0
worker_thread+0x37/0x380
kthread+0x144/0x170
ret_from_fork+0x1f/0x30
-> #0 (&dev->master_mutex){+.+.}-{3:3}:
__lock_acquire+0x151e/0x2590
lock_acquire+0xd1/0x3d0
__mutex_lock+0xab/0x970
drm_is_current_master+0x1b/0x40
drm_mode_getconnector+0x37e/0x4a0
drm_ioctl_kernel+0xa8/0xf0
drm_ioctl+0x1e8/0x390
__x64_sys_ioctl+0x6a/0xa0
do_syscall_64+0x39/0xb0
entry_SYSCALL_64_after_hwframe+0x44/0xae
other info that might help us debug this:
Chain exists of: &dev->master_mutex --> &client->modeset_mutex --> &dev->mode_config.mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&dev->mode_config.mutex);
lock(&client->modeset_mutex);
lock(&dev->mode_config.mutex);
lock(&dev->master_mutex);
*** DEADLOCK ***
1 lock held by kms_frontbuffer/1087:
#0: ffff88810dcd0488 (&dev->mode_config.mutex){+.+.}-{3:3}, at: drm_mode_getconnector+0x1c6/0x4a0
stack backtrace:
CPU: 7 PID: 1087 Comm: kms_frontbuffer Not tainted 5.13.0-rc7-CI-CI_DRM_10254+ #1
Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP TLC, BIOS ICLSFWR1.R00.3234.A01.1906141750 06/14/2019
Call Trace:
dump_stack+0x7f/0xad
check_noncircular+0x12e/0x150
__lock_acquire+0x151e/0x2590
lock_acquire+0xd1/0x3d0
__mutex_lock+0xab/0x970
drm_is_current_master+0x1b/0x40
drm_mode_getconnector+0x37e/0x4a0
drm_ioctl_kernel+0xa8/0xf0
drm_ioctl+0x1e8/0x390
__x64_sys_ioctl+0x6a/0xa0
do_syscall_64+0x39/0xb0
entry_SYSCALL_64_after_hwframe+0x44/0xae
Note that this broke the intel-gfx CI pretty much across the board
because it has to reboot machines after it hits a lockdep splat.
Testcase: igt/debugfs_test/read_all_entries
Acked-by: Petri Latvala <petri.latvala@intel.com>
Fixes: 1815d9c86e ("drm: add a locked version of drm_is_current_master")
Cc: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210622075409.2673805-1-daniel.vetter@ffwll.ch
While checking the master status of the DRM file in
drm_is_current_master(), the device's master mutex should be
held. Without the mutex, the pointer fpriv->master may be freed
concurrently by another process calling drm_setmaster_ioctl(). This
could lead to use-after-free errors when the pointer is subsequently
dereferenced in drm_lease_owner().
The callers of drm_is_current_master() from drm_auth.c hold the
device's master mutex, but external callers do not. Hence, we implement
drm_is_current_master_locked() to be used within drm_auth.c, and
modify drm_is_current_master() to grab the device's master mutex
before checking the master status.
Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210620110327.4964-2-desmondcheongzx@gmail.com
Reference the spi_device_id table to silence W=1 warning:
drivers/gpu/drm/panel/panel-samsung-ld9040.c:377:35:
warning: ‘ld9040_ids’ defined but not used [-Wunused-const-variable=]
This also would be needed for matching the driver if booted without
CONFIG_OF (although it's not necessarily real case).
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210526123002.12913-1-krzysztof.kozlowski@canonical.com
'commit eec44d44a3 ("drm/atmel: Use drm_atomic_helper_commit")'
removed the home-grown handling of atomic commits and exposed an issue
in the crtc atomic commit handling where vblank is expected to be
enabled but hasn't yet, causing kernel warnings during boot. This patch
cleans up the crtc vblank handling thus removing the warning on boot.
Fixes: eec44d44a3 ("drm/atmel: Use drm_atomic_helper_commit")
Signed-off-by: Dan Sneddon <dan.sneddon@microchip.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210602160846.5013-1-dan.sneddon@microchip.com
If the HPD GPIO is not available and drm_probe_ddc fails, we end up
reading the HDMI_HOTPLUG register, but the controller might be powered
off resulting in a CPU hang. Make sure we have the power domain and the
HSM clock powered during the detect cycle to prevent the hang from
happening.
Fixes: 4f6e3d66ac ("drm/vc4: Add runtime PM support to the HDMI encoder driver")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210525091059.234116-4-maxime@cerno.tech
In order to access the HDMI controller, we need to make sure the HSM
clock is enabled. If we were to access it with the clock disabled, the
CPU would completely hang, resulting in an hard crash.
Since we have different code path that would require it, let's move that
clock enable / disable to runtime_pm that will take care of the
reference counting for us.
Fixes: 4f6e3d66ac ("drm/vc4: Add runtime PM support to the HDMI encoder driver")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210525091059.234116-3-maxime@cerno.tech
This patch eliminates the following smatch warning:
drivers/gpu/drm/drm_auth.c:320 drm_master_release() warn: unlocked access 'master' (line 318) expected lock '&dev->master_mutex'
The 'file_priv->master' field should be protected by the mutex lock to
'&dev->master_mutex'. This is because other processes can concurrently
modify this field and free the current 'file_priv->master'
pointer. This could result in a use-after-free error when 'master' is
dereferenced in subsequent function calls to
'drm_legacy_lock_master_cleanup()' or to 'drm_lease_revoke()'.
An example of a scenario that would produce this error can be seen
from a similar bug in 'drm_getunique()' that was reported by Syzbot:
https://syzkaller.appspot.com/bug?id=148d2f1dfac64af52ffd27b661981a540724f803
In the Syzbot report, another process concurrently acquired the
device's master mutex in 'drm_setmaster_ioctl()', then overwrote
'fpriv->master' in 'drm_new_set_master()'. The old value of
'fpriv->master' was subsequently freed before the mutex was unlocked.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210609092119.173590-1-desmondcheongzx@gmail.com
The calclulation of how many bytes we stuff into the
DSI pipeline for video mode panels is off by three
orders of magnitude because we did not account for the
fact that the DRM mode clock is in kilohertz rather
than hertz.
This used to be:
drm_mode_vrefresh(mode) * mode->htotal * mode->vtotal
which would become for example for s6e63m0:
60 x 514 x 831 = 25628040 Hz, but mode->clock is
25628 as it is in kHz.
This affects only the Samsung GT-I8190 "Golden" phone
right now since it is the only MCDE device with a video
mode display.
Curiously some specimen work with this code and wild
settings in the EOL and empty packets at the end of the
display, but I have noticed an eeire flicker until now.
Others were not so lucky and got black screens.
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reported-by: Stephan Gerhold <stephan@gerhold.net>
Fixes: 920dd1b142 ("drm/mcde: Use mode->clock instead of reverse calculating it from the vrefresh")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20210608213318.3897858-1-linus.walleij@linaro.org
There is a time-of-check-to-time-of-use error in drm_getunique() due
to retrieving file_priv->master prior to locking the device's master
mutex.
An example can be seen in the crash report of the use-after-free error
found by Syzbot:
https://syzkaller.appspot.com/bug?id=148d2f1dfac64af52ffd27b661981a540724f803
In the report, the master pointer was used after being freed. This is
because another process had acquired the device's master mutex in
drm_setmaster_ioctl(), then overwrote fpriv->master in
drm_new_set_master(). The old value of fpriv->master was subsequently
freed before the mutex was unlocked.
To fix this, we lock the device's master mutex before retrieving the
pointer from from fpriv->master. This patch passes the Syzbot
reproducer test.
Reported-by: syzbot+c3a706cec1ea99e1c693@syzkaller.appspotmail.com
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210608110436.239583-1-desmondcheongzx@gmail.com
In vc4_atomic_commit_tail() we iterate of the set of old CRTCs, and
attempt to wait on any channels which are still in use. When we iterate
over the CRTCs, we have:
* `i` - the index of the CRTC
* `channel` - the channel a CRTC is using
When we check the channel state, we consult:
old_hvs_state->fifo_state[channel].in_use
... but when we wait for the channel, we erroneously wait on:
old_hvs_state->fifo_state[i].pending_commit
... rather than:
old_hvs_state->fifo_state[channel].pending_commit
... and this bogus access has been observed to result in boot-time hangs
on some arm64 configurations, and can be detected using KASAN. FIx this
by using the correct index.
I've tested this on a Raspberry Pi 3 model B v1.2 with KASAN.
Trimmed KASAN splat:
| ==================================================================
| BUG: KASAN: slab-out-of-bounds in vc4_atomic_commit_tail+0x1cc/0x910
| Read of size 8 at addr ffff000007360440 by task kworker/u8:0/7
| CPU: 2 PID: 7 Comm: kworker/u8:0 Not tainted 5.13.0-rc3-00009-g694c523e7267 #3
|
| Hardware name: Raspberry Pi 3 Model B (DT)
| Workqueue: events_unbound deferred_probe_work_func
| Call trace:
| dump_backtrace+0x0/0x2b4
| show_stack+0x1c/0x30
| dump_stack+0xfc/0x168
| print_address_description.constprop.0+0x2c/0x2c0
| kasan_report+0x1dc/0x240
| __asan_load8+0x98/0xd4
| vc4_atomic_commit_tail+0x1cc/0x910
| commit_tail+0x100/0x210
| ...
|
| Allocated by task 7:
| kasan_save_stack+0x2c/0x60
| __kasan_kmalloc+0x90/0xb4
| vc4_hvs_channels_duplicate_state+0x60/0x1a0
| drm_atomic_get_private_obj_state+0x144/0x230
| vc4_atomic_check+0x40/0x73c
| drm_atomic_check_only+0x998/0xe60
| drm_atomic_commit+0x34/0x94
| drm_client_modeset_commit_atomic+0x2f4/0x3a0
| drm_client_modeset_commit_locked+0x8c/0x230
| drm_client_modeset_commit+0x38/0x60
| drm_fb_helper_set_par+0x104/0x17c
| fbcon_init+0x43c/0x970
| visual_init+0x14c/0x1e4
| ...
|
| The buggy address belongs to the object at ffff000007360400
| which belongs to the cache kmalloc-128 of size 128
| The buggy address is located 64 bytes inside of
| 128-byte region [ffff000007360400, ffff000007360480)
| The buggy address belongs to the page:
| page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7360
| flags: 0x3fffc0000000200(slab|node=0|zone=0|lastcpupid=0xffff)
| raw: 03fffc0000000200 dead000000000100 dead000000000122 ffff000004c02300
| raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
| page dumped because: kasan: bad access detected
|
| Memory state around the buggy address:
| ffff000007360300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
| ffff000007360380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
| >ffff000007360400: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
| ^
| ffff000007360480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
| ffff000007360500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
| ==================================================================
Link: https://lore.kernel.org/r/4d0c8318-bad8-2be7-e292-fc8f70c198de@samsung.com
Link: https://lore.kernel.org/linux-arm-kernel/20210607151740.moncryl5zv3ahq4s@gilmour
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Emma Anholt <emma@anholt.net>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Will Deacon <will@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210608085513.2069-1-mark.rutland@arm.com
We need to grab the resv lock first before doing that check.
v2 (chk): simplify the change for -fixes
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210528130041.1683-1-christian.koenig@amd.com
On sunxi boards that use HDMI output, HDMI device probe keeps being
avoided indefinitely with these repeated messages in dmesg:
platform 1ee0000.hdmi: probe deferral - supplier 1ef0000.hdmi-phy
not ready
There's a fwnode_link being created with fw_devlink=on between hdmi
and hdmi-phy nodes, because both nodes have 'compatible' property set.
Fw_devlink code assumes that nodes that have compatible property
set will also have a device associated with them by some driver
eventually. This is not the case with the current sun8i-hdmi
driver.
This commit makes sun8i-hdmi-phy into a proper platform device
and fixes the display pipeline probe on sunxi boards that use HDMI.
More context: https://lkml.org/lkml/2021/5/16/203
Signed-off-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Ondrej Jirman <megous@megous.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210607085836.2827429-1-megous@megous.com
Commit ccf953d8f3 makes framebuffers which use deferred I/O stop
displaying updates after the first one. This is because the pages
handled by fb_defio no longer have a page_mapping(). That prevents
page_mkclean() from marking the PTEs as clean, and so writes are only
noticed the first time.
Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/YLZEhv0cpZp8uVE3@casper.infradead.org
Pull i2c fixes from Wolfram Sang:
"This is a bit larger than usual at rc4 time. The reason is due to
Lee's work of fixing newly reported build warnings.
The rest is fixes as usual"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (22 commits)
MAINTAINERS: adjust to removing i2c designware platform data
i2c: s3c2410: fix possible NULL pointer deref on read message after write
i2c: mediatek: Disable i2c start_en and clear intr_stat brfore reset
i2c: i801: Don't generate an interrupt on bus reset
i2c: mpc: implement erratum A-004447 workaround
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 i2c controllers
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers
dt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag
i2c: busses: i2c-stm32f4: Remove incorrectly placed ' ' from function name
i2c: busses: i2c-st: Fix copy/paste function misnaming issues
i2c: busses: i2c-pnx: Provide descriptions for 'alg_data' data structure
i2c: busses: i2c-ocores: Place the expected function names into the documentation headers
i2c: busses: i2c-eg20t: Fix 'bad line' issue and provide description for 'msgs' param
i2c: busses: i2c-designware-master: Fix misnaming of 'i2c_dw_init_master()'
i2c: busses: i2c-cadence: Fix incorrectly documented 'enum cdns_i2c_slave_mode'
i2c: busses: i2c-ali1563: File headers are not good candidates for kernel-doc
i2c: muxes: i2c-arb-gpio-challenge: Demote non-conformant kernel-doc headers
i2c: busses: i2c-nomadik: Fix formatting issue pertaining to 'timeout'
i2c: sh_mobile: Use new clock calculation formulas for RZ/G2E
i2c: I2C_HISI should depend on ACPI
...
- Fix addfd notification race condition (Sargun Dhillon)
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Merge tag 'seccomp-fixes-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull seccomp fixes from Kees Cook:
"This fixes a hard-to-hit race condition in the addfd user_notif
feature of seccomp, visible since v5.9.
And a small documentation fix"
* tag 'seccomp-fixes-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
seccomp: Refactor notification handler to prepare for new semantics
Documentation: seccomp: Fix user notification documentation
I have a handful of RISC-V related fixes:
* A fix to avoid errors when the stack tracing code is tracing itself.
* A fix to resurrect the memtest= kernel command line argument on
RISC-V, which was briefly enabled during the merge window before a
refactoring disabled it.
* A build fix and some warning cleanups.
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Merge tag 'riscv-for-linus-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
"A handful of RISC-V related fixes:
- avoid errors when the stack tracing code is tracing itself.
- resurrect the memtest= kernel command line argument on RISC-V,
which was briefly enabled during the merge window before a
refactoring disabled it.
- build fix and some warning cleanups"
* tag 'riscv-for-linus-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: kexec: Fix W=1 build warnings
riscv: kprobes: Fix build error when MMU=n
riscv: Select ARCH_USE_MEMTEST
riscv: stacktrace: fix the riscv stacktrace when CONFIG_FRAME_POINTER enabled
- Fix a bug where unmapping operations end earlier than expected, which
can cause chaos on multi-block directory and symlink shrink
operations.
- Fix an erroneous assert that can trigger if we try to transition a
bmap structure from btree format to extents format with zero extents.
This was exposed by xfs/538.
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Merge tag 'xfs-5.13-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
"This week's pile mitigates some decades-old problems in how extent
size hints interact with realtime volumes, fixes some failures in
online shrink, and fixes a problem where directory and symlink
shrinking on extremely fragmented filesystems could fail.
The most user-notable change here is to point users at our (new) IRC
channel on OFTC. Freedom isn't free, it costs folks like you and me;
and if you don't kowtow, they'll expel everyone and take over your
channel. (Ok, ok, that didn't fit the song lyrics...)
Summary:
- Fix a bug where unmapping operations end earlier than expected,
which can cause chaos on multi-block directory and symlink shrink
operations.
- Fix an erroneous assert that can trigger if we try to transition a
bmap structure from btree format to extents format with zero
extents. This was exposed by xfs/538"
* tag 'xfs-5.13-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: bunmapi has unnecessary AG lock ordering issues
xfs: btree format inode forks can have zero extents
xfs: add new IRC channel to MAINTAINERS
xfs: validate extsz hints against rt extent size when rtinherit is set
xfs: standardize extent size hint validation
xfs: check free AG space when making per-AG reservations
This refactors the user notification code to have a do / while loop around
the completion condition. This has a small change in semantic, in that
previously we ignored addfd calls upon wakeup if the notification had been
responded to, but instead with the new change we check for an outstanding
addfd calls prior to returning to userspace.
Rodrigo Campos also identified a bug that can result in addfd causing
an early return, when the supervisor didn't actually handle the
syscall [1].
[1]: https://lore.kernel.org/lkml/20210413160151.3301-1-rodrigo@kinvolk.io/
Fixes: 7cf97b1254 ("seccomp: Introduce addfd ioctl to seccomp user notifier")
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Acked-by: Tycho Andersen <tycho@tycho.pizza>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Rodrigo Campos <rodrigo@kinvolk.io>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210517193908.3113-3-sargun@sargun.me
Here are some tiny char/misc driver fixes for 5.13-rc4.
Nothing huge here, just some tiny fixes for reported issues:
- 2 interconnect driver fixes
- kgdb build warning fix for gcc-11
- hgafb regression fix
- soundwire driver fix
- mei driver fix
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some tiny char/misc driver fixes for 5.13-rc4.
Nothing huge here, just some tiny fixes for reported issues:
- two interconnect driver fixes
- kgdb build warning fix for gcc-11
- hgafb regression fix
- soundwire driver fix
- mei driver fix
All have been in linux-next with no reported issues"
* tag 'char-misc-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
mei: request autosuspend after sending rx flow control
kgdb: fix gcc-11 warnings harder
video: hgafb: correctly handle card detect failure during probe
soundwire: qcom: fix handling of qcom,ports-block-pack-mode
interconnect: qcom: Add missing MODULE_DEVICE_TABLE
interconnect: qcom: bcm-voter: add a missing of_node_put()
Here are 3 small driver core / debugfs fixes for 5.13-rc4:
- debugfs fix for incorrect "lockdown" mode for selinux accesses
- 2 device link changes, one bugfix and one cleanup
All of these have been in linux-next for over a week with no reported
problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are three small driver core / debugfs fixes for 5.13-rc4:
- debugfs fix for incorrect "lockdown" mode for selinux accesses
- two device link changes, one bugfix and one cleanup
All of these have been in linux-next for over a week with no reported
problems"
* tag 'driver-core-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
drivers: base: Reduce device link removal code duplication
drivers: base: Fix device link removal
debugfs: fix security_locked_down() call for SELinux
Here are some small IIO and staging driver fixes for reported issues for
5.13-rc4.
Nothing major here, tiny changes for reported problems, full details are
in the shortlog if people are curious.
All have been in linux-next for a while with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO driver fixes from Greg KH:
"Here are some small IIO and staging driver fixes for reported issues
for 5.13-rc4.
Nothing major here, tiny changes for reported problems, full details
are in the shortlog if people are curious.
All have been in linux-next for a while with no reported problems"
* tag 'staging-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
iio: adc: ad7793: Add missing error code in ad7793_setup()
iio: adc: ad7923: Fix undersized rx buffer.
iio: adc: ad7768-1: Fix too small buffer passed to iio_push_to_buffers_with_timestamp()
iio: dac: ad5770r: Put fwnode in error case during ->probe()
iio: gyro: fxas21002c: balance runtime power in error path
staging: emxx_udc: fix loop in _nbu2ss_nuke()
staging: iio: cdc: ad7746: avoid overwrite of num_channels
iio: adc: ad7192: handle regulator voltage error first
iio: adc: ad7192: Avoid disabling a clock that was never enabled.
iio: adc: ad7124: Fix potential overflow due to non sequential channel numbers
iio: adc: ad7124: Fix missbalanced regulator enable / disable on error.
Here are some small fixes for reported problems for tty and serial
drivers for 5.13-rc4.
They consist of:
- 8250 bugfixes and new device support
- lockdown security mode fixup
- syzbot found problems fixed
- 8250_omap fix for interrupt storm
- revert of 8250_omap driver fix as it caused worse problem than
the original issue
All but the last patch have been in linux-next for a while, the last one
is a revert of a problem found in linux-next with the 8250_omap driver
change.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty / serial driver fixes from Greg KH:
"Here are some small fixes for reported problems for tty and serial
drivers for 5.13-rc4.
They consist of:
- 8250 bugfixes and new device support
- lockdown security mode fixup
- syzbot found problems fixed
- 8250_omap fix for interrupt storm
- revert of 8250_omap driver fix as it caused worse problem than the
original issue
All but the last patch have been in linux-next for a while, the last
one is a revert of a problem found in linux-next with the 8250_omap
driver change"
* tag 'tty-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
Revert "serial: 8250: 8250_omap: Fix possible interrupt storm"
serial: 8250_pci: handle FL_NOIRQ board flag
serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait'
serial: 8250_pci: Add support for new HPE serial device
serial: 8250: 8250_omap: Fix possible interrupt storm
serial: 8250: Use BIT(x) for UART_{CAP,BUG}_*
serial: 8250: Add UART_BUG_TXRACE workaround for Aspeed VUART
serial: 8250_dw: Add device HID for new AMD UART controller
serial: sh-sci: Fix off-by-one error in FIFO threshold register setting
serial: core: fix suspicious security_locked_down() call
serial: tegra: Fix a mask operation that is always true
Here are a number of tiny USB and Thunderbolt driver fixes for 5.13-rc4.
They consist of:
- thunderbolt fixes for some NVM bound issues
- xhci fixes for reported problems
- control-request fixups
- documentation build warning fixes
- new usb-serial driver device ids
- typec bugfixes for reported issues
- usbfs warning fixups (could be triggered from userspace)
- other tiny fixes for reported problems.
All of these have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / Thunderbolt fixes from Greg KH:
"Here are a number of tiny USB and Thunderbolt driver fixes for
5.13-rc4.
They consist of:
- thunderbolt fixes for some NVM bound issues
- xhci fixes for reported problems
- control-request fixups
- documentation build warning fixes
- new usb-serial driver device ids
- typec bugfixes for reported issues
- usbfs warning fixups (could be triggered from userspace)
- other tiny fixes for reported problems.
All of these have been in linux-next with no reported issues"
* tag 'usb-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (22 commits)
xhci: Fix 5.12 regression of missing xHC cache clearing command after a Stall
xhci: fix giving back URB with incorrect status regression in 5.12
usb: gadget: udc: renesas_usb3: Fix a race in usb3_start_pipen()
usb: typec: tcpm: Respond Not_Supported if no snk_vdo
usb: typec: tcpm: Properly interrupt VDM AMS
USB: trancevibrator: fix control-request direction
usb: Restore the usb_header label
usb: typec: tcpm: Use LE to CPU conversion when accessing msg->header
usb: typec: ucsi: Clear pending after acking connector change
usb: typec: mux: Fix matching with typec_altmode_desc
misc/uss720: fix memory leak in uss720_probe
usb: dwc3: gadget: Properly track pending and queued SG
USB: usbfs: Don't WARN about excessively large memory allocations
thunderbolt: usb4: Fix NVM read buffer bounds and offset issue
thunderbolt: dma_port: Fix NVM read buffer bounds and offset issue
usb: chipidea: udc: assign interrupt number to USB gadget structure
usb: cdnsp: Fix lack of removing request from pending list.
usb: cdns3: Fix runtime PM imbalance on error
USB: serial: pl2303: add device id for ADLINK ND-6530 GC
USB: serial: ti_usb_3410_5052: add startech.com device id
...
* Another state update on exit to userspace fix
* Prevent the creation of mixed 32/64 VMs
* Fix regression with irqbypass not restarting the guest on failed connect
* Fix regression with debug register decoding resulting in overlapping access
* Commit exception state on exit to usrspace
* Fix the MMU notifier return values
* Add missing 'static' qualifiers in the new host stage-2 code
x86 fixes:
* fix guest missed wakeup with assigned devices
* fix WARN reported by syzkaller
* do not use BIT() in UAPI headers
* make the kvm_amd.avic parameter bool
PPC fixes:
* make halt polling heuristics consistent with other architectures
selftests:
* various fixes
* new performance selftest memslot_perf_test
* test UFFD minor faults in demand_paging_test
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"ARM fixes:
- Another state update on exit to userspace fix
- Prevent the creation of mixed 32/64 VMs
- Fix regression with irqbypass not restarting the guest on failed
connect
- Fix regression with debug register decoding resulting in
overlapping access
- Commit exception state on exit to usrspace
- Fix the MMU notifier return values
- Add missing 'static' qualifiers in the new host stage-2 code
x86 fixes:
- fix guest missed wakeup with assigned devices
- fix WARN reported by syzkaller
- do not use BIT() in UAPI headers
- make the kvm_amd.avic parameter bool
PPC fixes:
- make halt polling heuristics consistent with other architectures
selftests:
- various fixes
- new performance selftest memslot_perf_test
- test UFFD minor faults in demand_paging_test"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (44 commits)
selftests: kvm: fix overlapping addresses in memslot_perf_test
KVM: X86: Kill off ctxt->ud
KVM: X86: Fix warning caused by stale emulation context
KVM: X86: Use kvm_get_linear_rip() in single-step and #DB/#BP interception
KVM: x86/mmu: Fix comment mentioning skip_4k
KVM: VMX: update vcpu posted-interrupt descriptor when assigning device
KVM: rename KVM_REQ_PENDING_TIMER to KVM_REQ_UNBLOCK
KVM: x86: add start_assignment hook to kvm_x86_ops
KVM: LAPIC: Narrow the timer latency between wait_lapic_expire and world switch
selftests: kvm: do only 1 memslot_perf_test run by default
KVM: X86: Use _BITUL() macro in UAPI headers
KVM: selftests: add shared hugetlbfs backing source type
KVM: selftests: allow using UFFD minor faults for demand paging
KVM: selftests: create alias mappings when using shared memory
KVM: selftests: add shmem backing source type
KVM: selftests: refactor vm_mem_backing_src_type flags
KVM: selftests: allow different backing source types
KVM: selftests: compute correct demand paging size
KVM: selftests: simplify setup_demand_paging error handling
KVM: selftests: Print a message if /dev/kvm is missing
...
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Merge tag 's390-5.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Vasily Gorbik:
"Fix races in vfio-ccw request handling"
* tag 's390-5.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
vfio-ccw: Serialize FSM IDLE state with I/O completion
vfio-ccw: Reset FSM state to IDLE inside FSM
vfio-ccw: Check initialized flag in cp_init()
vm_create allocates memory and maps it close to GPA. This memory
is separate from what is allocated in subsequent calls to
vm_userspace_mem_region_add, so it is incorrect to pass the
test memory size to vm_create_default. Just pass a small
fixed amount of memory which can be used later for page table,
otherwise GPAs are already allocated at MEM_GPA and the
test aborts.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
10 small fixes, all in drivers.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Ten small fixes, all in drivers"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: target: qla2xxx: Wait for stop_phase1 at WWN removal
scsi: hisi_sas: Drop free_irq() of devm_request_irq() allocated irq
scsi: vmw_pvscsi: Set correct residual data length
scsi: bnx2fc: Return failure if io_req is already in ABTS processing
scsi: aic7xxx: Remove multiple definition of globals
scsi: aic7xxx: Restore several defines for aic7xxx firmware build
scsi: target: iblock: Fix smp_processor_id() BUG messages
scsi: libsas: Use _safe() loop in sas_resume_port()
scsi: target: tcmu: Fix xarray RCU warning
scsi: target: core: Avoid smp_processor_id() in preemptible code
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Merge tag 'io_uring-5.13-2021-05-28' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"A few minor fixes:
- Fix an issue with hashed wait removal on exit (Zqiang, Pavel)
- Fix a recent data race introduced in this series (Marco)"
* tag 'io_uring-5.13-2021-05-28' of git://git.kernel.dk/linux-block:
io_uring: fix data race to avoid potential NULL-deref
io-wq: Fix UAF when wakeup wqe in hash waitqueue
io_uring/io-wq: close io-wq full-stop gap
- Fix error checking of BPF prog attachment in 'perf stat'.
- Fix getting maximum number of fds in the vendor events JSON parser.
- Move debug initialization earlier, fixing a segfault in some cases.
- Fix eventcode of power10 JSON events.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-fixes-for-v5.13-2021-05-28' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf tools fixes from Arnaldo Carvalho de Melo:
- Fix error checking of BPF prog attachment in 'perf stat'.
- Fix getting maximum number of fds in the vendor events JSON parser.
- Move debug initialization earlier, fixing a segfault in some cases.
- Fix eventcode of power10 JSON events.
* tag 'perf-tools-fixes-for-v5.13-2021-05-28' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
perf vendor events powerpc: Fix eventcode of power10 JSON events
perf stat: Fix error check for bpf_program__attach
perf debug: Move debug initialization earlier
perf jevents: Fix getting maximum number of fds
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Merge tag '5.13-rc4-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Three SMB3 fixes.
Two for stable, and the other fixes a problem pointed out with a
recently added ioctl"
* tag '5.13-rc4-smb3' of git://git.samba.org/sfrench/cifs-2.6:
cifs: change format of CIFS_FULL_KEY_DUMP ioctl
cifs: fix string declarations and assignments in tracepoints
cifs: set server->cipher_type to AES-128-CCM for SMB3.0
Highlights include:
Stable fixes
- Fix v4.0/v4.1 SEEK_DATA return -ENOTSUPP when set NFS_V4_2 config
- Fix Oops in xs_tcp_send_request() when transport is disconnected
- Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
Bugfixes
- Fix instances where signal_pending() should be fatal_signal_pending()
- fix an incorrect limit in filelayout_decode_layout()
- Fixes for the SUNRPC backlogged RPC queue
- Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
- Revert commit 586a0787ce ("Clean up rpcrdma_prepare_readch()")
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Merge tag 'nfs-for-5.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
"Stable fixes:
- Fix v4.0/v4.1 SEEK_DATA return -ENOTSUPP when set NFS_V4_2 config
- Fix Oops in xs_tcp_send_request() when transport is disconnected
- Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
Bugfixes:
- Fix instances where signal_pending() should be fatal_signal_pending()
- fix an incorrect limit in filelayout_decode_layout()
- Fixes for the SUNRPC backlogged RPC queue
- Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
- Revert commit 586a0787ce ("Clean up rpcrdma_prepare_readch()")"
* tag 'nfs-for-5.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
nfs: Remove trailing semicolon in macros
xprtrdma: Revert 586a0787ce
NFSv4: Fix v4.0/v4.1 SEEK_DATA return -ENOTSUPP when set NFS_V4_2 config
NFS: Clean up reset of the mirror accounting variables
NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
NFS: Fix an Oopsable condition in __nfs_pageio_add_request()
SUNRPC: More fixes for backlog congestion
SUNRPC: Fix Oops in xs_tcp_send_request() when transport is disconnected
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
SUNRPC in case of backlog, hand free slots directly to waiting task
pNFS/NFSv4: Remove redundant initialization of 'rd_size'
NFS: fix an incorrect limit in filelayout_decode_layout()
fs/nfs: Use fatal_signal_pending instead of signal_pending
A slightly high volume at this time due to pending ASoC fixes.
While there are a few generic simple-card fixes for regressions,
most of the changes are device-specific fixes: ASoC Intel SOF, codec
clocks, other codec / platform fixes as well as usual HD-audio and
USB-audio.
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Merge tag 'sound-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A slightly high volume at this time due to pending ASoC fixes.
While there are a few generic simple-card fixes for regressions, most
of the changes are device-specific fixes: ASoC Intel SOF, codec
clocks, other codec / platform fixes as well as usual HD-audio and
USB-audio"
* tag 'sound-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (37 commits)
ALSA: hda/realtek: fix mute/micmute LEDs and speaker for HP Zbook Fury 17 G8
ALSA: hda/realtek: fix mute/micmute LEDs and speaker for HP Zbook Fury 15 G8
ALSA: hda/realtek: fix mute/micmute LEDs and speaker for HP Zbook G8
ALSA: hda/realtek: fix mute/micmute LEDs for HP 855 G8
ALSA: hda/realtek: Chain in pop reduction fixup for ThinkStation P340
ALSA: usb-audio: scarlett2: snd_scarlett_gen2_controls_create() can be static
ALSA: hda/realtek: the bass speaker can't output sound on Yoga 9i
ALSA: hda/realtek: Headphone volume is controlled by Front mixer
ALSA: usb-audio: scarlett2: Improve driver startup messages
ALSA: usb-audio: scarlett2: Fix device hang with ehci-pci
ALSA: usb-audio: fix control-request direction
ASoC: qcom: lpass-cpu: Use optional clk APIs
ASoC: cs35l33: fix an error code in probe()
ASoC: SOF: Intel: hda: don't send DAI_CONFIG IPC for older firmware
ASoC: fsl: fix SND_SOC_IMX_RPMSG dependency
ASoC: cs42l52: Minor tidy up of error paths
ASoC: cs35l32: Add missing regmap use_single config
ASoC: cs35l34: Add missing regmap use_single config
ASoC: cs42l73: Add missing regmap use_single config
ASoC: cs53l30: Add missing regmap use_single config
...
- Another state update on exit to userspace fix
- Prevent the creation of mixed 32/64 VMs
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Merge tag 'kvmarm-fixes-5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 5.13, take #2
- Another state update on exit to userspace fix
- Prevent the creation of mixed 32/64 VMs
ctxt->ud is consumed only by x86_decode_insn(), we can kill it off by
passing emulation_type to x86_decode_insn() and dropping ctxt->ud
altogether. Tracking that info in ctxt for literally one call is silly.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <1622160097-37633-2-git-send-email-wanpengli@tencent.com>
Reported by syzkaller:
WARNING: CPU: 7 PID: 10526 at linux/arch/x86/kvm//x86.c:7621 x86_emulate_instruction+0x41b/0x510 [kvm]
RIP: 0010:x86_emulate_instruction+0x41b/0x510 [kvm]
Call Trace:
kvm_mmu_page_fault+0x126/0x8f0 [kvm]
vmx_handle_exit+0x11e/0x680 [kvm_intel]
vcpu_enter_guest+0xd95/0x1b40 [kvm]
kvm_arch_vcpu_ioctl_run+0x377/0x6a0 [kvm]
kvm_vcpu_ioctl+0x389/0x630 [kvm]
__x64_sys_ioctl+0x8e/0xd0
do_syscall_64+0x3c/0xb0
entry_SYSCALL_64_after_hwframe+0x44/0xae
Commit 4a1e10d5b5 ("KVM: x86: handle hardware breakpoints during emulation())
adds hardware breakpoints check before emulation the instruction and parts of
emulation context initialization, actually we don't have the EMULTYPE_NO_DECODE flag
here and the emulation context will not be reused. Commit c8848cee74 ("KVM: x86:
set ctxt->have_exception in x86_decode_insn()) triggers the warning because it
catches the stale emulation context has #UD, however, it is not during instruction
decoding which should result in EMULATION_FAILED. This patch fixes it by moving
the second part emulation context initialization into init_emulate_ctxt() and
before hardware breakpoints check. The ctxt->ud will be dropped by a follow-up
patch.
syzkaller source: https://syzkaller.appspot.com/x/repro.c?x=134683fdd00000
Reported-by: syzbot+71271244f206d17f6441@syzkaller.appspotmail.com
Fixes: 4a1e10d5b5 (KVM: x86: handle hardware breakpoints during emulation)
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <1622160097-37633-1-git-send-email-wanpengli@tencent.com>
The kvm_get_linear_rip() handles x86/long mode cases well and has
better readability, __kvm_set_rflags() also use the paired
function kvm_is_linear_rip() to check the vcpu->arch.singlestep_rip
set in kvm_arch_vcpu_ioctl_set_guest_debug(), so change the
"CS.BASE + RIP" code in kvm_arch_vcpu_ioctl_set_guest_debug() and
handle_exception_nmi() to this one.
Signed-off-by: Yuan Yao <yuan.yao@intel.com>
Message-Id: <20210526063828.1173-1-yuan.yao@linux.intel.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The documentation had some previously incorrect information about how
userspace notifications (and responses) were handled due to a change
from a previously proposed patchset.
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Acked-by: Tycho Andersen <tycho@tycho.pizza>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Fixes: 6a21cc50f0 ("seccomp: add a return code to trap to userspace")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210517193908.3113-2-sargun@sargun.me
Commit 5a517b5bf6 ("i2c: designware: Get rid of legacy platform data")
removes ./include/linux/platform_data/i2c-designware.h, but misses to
adjust the SYNOPSYS DESIGNWARE I2C DRIVER section in MAINTAINERS.
Hence, ./scripts/get_maintainer.pl --self-test=patterns complains:
warning: no file matches F: include/linux/platform_data/i2c-designware.h
Remove the file entry to this removed file as well.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Fixed the eventcode values in the power10 JSON event files to prepend
"0x" since these are hexadecimal values.
The patch also changes the event description of the PM_EXEC_STALL_LOAD_FINISH
and PM_EXEC_STALL_NTC_FLUSH event and move some events to correct files.
Fixes: 32daa5d789 ("perf vendor events: Initial JSON/events list for power10 platform")
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Reviewed-by: Paul A. Clarke <pc@us.ibm.com>
Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lore.kernel.org/lkml/20210525063723.1191514-1-kjain@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This reverts commit 31fae7c8b1.
Tony writes:
I just noticed this causes the following regression in Linux
next when pressing a key on uart console after boot at least on
omap3. This seems to happen on serial_port_in(port, UART_RX) in
the quirk handling.
So let's drop this.
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/YLCCJzkkB4N7LTQS@atomide.com
Fixes: 31fae7c8b1 ("serial: 8250: 8250_omap: Fix possible interrupt storm")
Reported-by: Tony Lindgren <tony@atomide.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Christian König