| Commit message (Collapse) | Author | Age | Files | Lines |
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The usb-serial fixes are based on this branch, so merge it in here to
prevent merge confusion when merging in that tree.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In patch a1a2b7125e10 (Drop static setup of IRQ resource from DT
core) we stopped platform_get_resource() from returning the IRQ, as all
drivers were supposed to have switched to platform_get_irq()
Unfortunately the Freescale EHCI driver in host mode got missed. Fix
it.
Fixes: a1a2b7125e10 ("of/platform: Drop static setup of IRQ resource from DT core")
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Suggested-by: Rob Herring <robh@kernel.org>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Darren Stevens <darren@stevens-zone.net>
Link: https://lore.kernel.org/r/20220702220355.63b36fb8@Cyrus.lan
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When setting the function name, it is always truncated by one char since
snprintf is always including the null-termination in the len parameter.
We use strscpy and fix the size setting to use len + 1 instead.
Fixes: 324e4f85070f ("usb: gadget: uvc: allow changing interface name via configfs")
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20220707115612.2760569-1-m.grzeschik@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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System like Android allow user control power role from UI, it is possible
to implement application base on typec uevent to refresh UI, but found
there is chance that UI show different state from typec attribute file.
In typec_set_pwr_opmode(), when partner support PD, there is no uevent
send to user space which cause the problem.
Fix it by sending uevent notification when change power mode to PD.
Fixes: bdecb33af34f ("usb: typec: API for controlling USB Type-C Multiplexers")
Cc: stable@vger.kernel.org
Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
Link: https://lore.kernel.org/r/1656662934-10226-1-git-send-email-quic_linyyuan@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The clk get by devm_clk_get() will be released in devres_release_all(),
so there is no need explicitly call clk_put(), or it will cause UAF.
Fixes: e8784c0aec03 ("drivers: usb: dwc3: Add AM62 USB wrapper driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220629094635.3116961-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The DWC3_EVENT_PENDING flag is used to protect against invalid call to
top-half interrupt handler, which can occur when there's a delay in
software detection of the interrupt line deassertion.
However, the clearing of this flag was done prior to unmasking the
interrupt line, creating opportunity where the top-half handler can
come. This breaks the serialization and creates a race between the
top-half and bottom-half handler, resulting in losing synchronization
between the controller and the driver when processing events.
To fix this, make sure the clearing of the DWC3_EVENT_PENDING is done at
the end of the bottom-half handler.
Fixes: d325a1de49d6 ("usb: dwc3: gadget: Prevent losing events in event cache")
Cc: stable@vger.kernel.org
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/8670aaf1cf52e7d1e6df2a827af2d77263b93b75.1656380429.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty and serial driver fixes from Greg KH:
"Here are some TTY and Serial driver fixes for 5.19-rc7. They resolve a
number of reported problems including:
- longtime bug in pty_write() that has been reported in the past.
- 8250 driver fixes
- new serial device ids
- vt overlapping data copy bugfix
- other tiny serial driver bugfixes
All of these have been in linux-next for a while with no reported
problems"
* tag 'tty-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: use new tty_insert_flip_string_and_push_buffer() in pty_write()
tty: extract tty_flip_buffer_commit() from tty_flip_buffer_push()
serial: 8250: dw: Fix the macro RZN1_UART_xDMACR_8_WORD_BURST
vt: fix memory overlapping when deleting chars in the buffer
serial: mvebu-uart: correctly report configured baudrate value
serial: 8250: Fix PM usage_count for console handover
serial: 8250: fix return error code in serial8250_request_std_resource()
serial: stm32: Clear prev values before setting RTS delays
tty: Add N_CAN327 line discipline ID for ELM327 based CAN driver
serial: 8250: Fix __stop_tx() & DMA Tx restart races
serial: pl011: UPSTAT_AUTORTS requires .throttle/unthrottle
tty: serial: samsung_tty: set dma burst_size to 1
serial: 8250: dw: enable using pdata with ACPI
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There is a race in pty_write(). pty_write() can be called in parallel
with e.g. ioctl(TIOCSTI) or ioctl(TCXONC) which also inserts chars to
the buffer. Provided, tty_flip_buffer_push() in pty_write() is called
outside the lock, it can commit inconsistent tail. This can lead to out
of bounds writes and other issues. See the Link below.
To fix this, we have to introduce a new helper called
tty_insert_flip_string_and_push_buffer(). It does both
tty_insert_flip_string() and tty_flip_buffer_commit() under the port
lock. It also calls queue_work(), but outside the lock. See
71a174b39f10 (pty: do tty_flip_buffer_push without port->lock in
pty_write) for the reasons.
Keep the helper internal-only (in drivers' tty.h). It is not intended to
be used widely.
Link: https://seclists.org/oss-sec/2022/q2/155
Fixes: 71a174b39f10 (pty: do tty_flip_buffer_push without port->lock in pty_write)
Cc: 一只狗 <chennbnbnb@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Suggested-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220707082558.9250-2-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We will need this new helper in the next patch.
Cc: Hillf Danton <hdanton@sina.com>
Cc: 一只狗 <chennbnbnb@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220707082558.9250-1-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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As per RZ/N1 peripheral user manual(r01uh0752ej0100-rzn1-peripheral.pdf)
rev 1.0.0 Mar,2019, the value for 8_WORD_BURST is 4(b2,b1=2’b10).
This patch fixes the macro as per the user manual.
Fixes: aa63d786cea2 ("serial: 8250: dw: Add support for DMA flow controlling devices")
Reviewed-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20220630083909.4294-1-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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A memory overlapping copy occurs when deleting a long line. This memory
overlapping copy can cause data corruption when scr_memcpyw is optimized
to memcpy because memcpy does not ensure its behavior if the destination
buffer overlaps with the source buffer. The line buffer is not always
broken, because the memcpy utilizes the hardware acceleration, whose
result is not deterministic.
Fix this problem by using replacing the scr_memcpyw with scr_memmovew.
Fixes: 81732c3b2fed ("tty vt: Fix line garbage in virtual console on command line edition")
Cc: stable <stable@kernel.org>
Signed-off-by: Yangxi Xiang <xyangxi5@gmail.com>
Link: https://lore.kernel.org/r/20220628093322.5688-1-xyangxi5@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Functions tty_termios_encode_baud_rate() and uart_update_timeout() should
be called with the baudrate value which was set to hardware. Linux then
report exact values via ioctl(TCGETS2) to userspace.
Change mvebu_uart_baud_rate_set() function to return baudrate value which
was set to hardware and propagate this value to above mentioned functions.
With this change userspace would see precise value in termios c_ospeed
field.
Fixes: 68a0db1d7da2 ("serial: mvebu-uart: add function to change baudrate")
Cc: stable <stable@kernel.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20220628100922.10717-1-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When console is enabled, univ8250_console_setup() calls
serial8250_console_setup() before .dev is set to uart_port. Therefore,
it will not call pm_runtime_get_sync(). Later, when the actual driver
is going to take over univ8250_console_exit() is called. As .dev is
already set, serial8250_console_exit() makes pm_runtime_put_sync() call
with usage count being zero triggering PM usage count warning
(extra debug for univ8250_console_setup(), univ8250_console_exit(), and
serial8250_register_ports()):
[ 0.068987] univ8250_console_setup ttyS0 nodev
[ 0.499670] printk: console [ttyS0] enabled
[ 0.717955] printk: console [ttyS0] printing thread started
[ 1.960163] serial8250_register_ports assigned dev for ttyS0
[ 1.976830] printk: console [ttyS0] disabled
[ 1.976888] printk: console [ttyS0] printing thread stopped
[ 1.977073] univ8250_console_exit ttyS0 usage:0
[ 1.977075] serial8250 serial8250: Runtime PM usage count underflow!
[ 1.977429] dw-apb-uart.6: ttyS0 at MMIO 0x4010006000 (irq = 33, base_baud = 115200) is a 16550A
[ 1.977812] univ8250_console_setup ttyS0 usage:2
[ 1.978167] printk: console [ttyS0] printing thread started
[ 1.978203] printk: console [ttyS0] enabled
To fix the issue, call pm_runtime_get_sync() in
serial8250_register_ports() as soon as .dev is set for an uart_port
if it has console enabled.
This problem became apparent only recently because 82586a721595 ("PM:
runtime: Avoid device usage count underflows") added the warning
printout. I confirmed this problem also occurs with v5.18 (w/o the
warning printout, obviously).
Fixes: bedb404e91bb ("serial: 8250_port: Don't use power management for kernel console")
Cc: stable <stable@kernel.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/b4f428e9-491f-daf2-2232-819928dc276e@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If port->mapbase = NULL in serial8250_request_std_resource() , it need
return a error code instead of 0. If uart_set_info() fail to request new
regions by serial8250_request_std_resource() but the return value of
serial8250_request_std_resource() is 0, The system incorrectly considers
that the resource application is successful and does not attempt to
restore the old setting. A null pointer reference is triggered when the
port resource is later invoked.
Signed-off-by: Yi Yang <yiyang13@huawei.com>
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/20220628083515.64138-1-yiyang13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The code lacks clearing of previous DEAT/DEDT values. Thus, changing
values on the fly results in garbage delays tending towards the maximum
value as more and more bits are ORed together. (Leaving RS485 mode
would have cleared the old values though).
Fixes: 1bcda09d2910 ("serial: stm32: add support for RS485 hardware control mode")
Cc: stable <stable@kernel.org>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220627150753.34510-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The actual driver will be added via the CAN tree.
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Max Staudt <max@enpas.org>
Link: https://lore.kernel.org/r/20220618180134.9890-1-max@enpas.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Commit e8ffbb71f783 ("serial: 8250: use THRE & __stop_tx also with
DMA") changed __dma_tx_complete() to enable THRI that is cleared in
__stop_tx() once THRE is asserted as UART runs out bits to transmit. It
is possible, however, that more data arrives in between in which case
serial8250_tx_dma() resumes Tx. THRI is not supposed to be on during
DMA Tx because DMA is based on completion handler, therefore THRI must
be cleared unconditionally in serial8250_tx_dma().
When Tx is about to start, another race window exists with
serial8250_handle_irq() leading to a call into __stop_tx() while the
Tx has already been resumed:
__tx_complete():
-> spin_lock(port->lock)
-> dma->tx_running = 0
-> serial8250_set_THRI()
-> spin_unlock(port->lock)
uart_start():
serial8250_handle_irq():
-> spin_lock(port->lock)
-> serial8250_tx_dma():
-> dma->tx_running = 1
-> spin_unlock(port->lock)
-> spin_lock(port->lock)
-> __stop_tx()
Close this race by checking !dma->tx_running before calling into
__stop_tx().
Fixes: e8ffbb71f783 ("serial: 8250: use THRE & __stop_tx also with DMA")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220615090651.15340-2-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The driver must provide throttle and unthrottle in uart_ops when it
sets UPSTAT_AUTORTS. Add them using existing stop_rx &
enable_interrupts functions.
Fixes: 2a76fa283098 (serial: pl011: Adopt generic flag to store auto RTS status)
Cc: stable <stable@kernel.org>
Cc: Lukas Wunner <lukas@wunner.de>
Reported-by: Nuno Gonçalves <nunojpg@gmail.com>
Tested-by: Nuno Gonçalves <nunojpg@gmail.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220614075637.8558-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The src_maxburst and dst_maxburst have been changed to 1 but the settings
of the UCON register aren't changed yet. They should be changed as well
according to the dmaengine slave config.
Fixes: aa2f80e752c7 ("serial: samsung: fix maxburst parameter for DMA transactions")
Cc: stable <stable@kernel.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Link: https://lore.kernel.org/r/20220627065113.139520-1-chanho61.park@samsung.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Commit ffd381445eac ("serial: 8250: dw: Move the USR register to pdata")
caused NULL-pointer dereference when booting with ACPI by unconditional
usage of the recently added pdata.
In order to fix that and prevent similar issues in future, hook the
default version of this structure in dw8250_acpi_match table.
While at it, sort all entries alphabetically.
Fixes: ffd381445eac ("serial: 8250: dw: Move the USR register to pdata")
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Link: https://lore.kernel.org/r/20220620121046.1307412-1-mw@semihalf.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Alexander Gordeev:
- Fix building of out-of-tree kernel modules without a pre-built kernel
in case CONFIG_EXPOLINE_EXTERN=y.
- Fix a reference counting error that could prevent unloading of zcrypt
modules.
* tag 's390-5.19-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/ap: fix error handling in __verify_queue_reservations()
s390/nospec: remove unneeded header includes
s390/nospec: build expoline.o for modules_prepare target
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The AP bus's __verify_queue_reservations function increments the ref count
for the device driver passed in as a parameter, but fails to decrement it
before returning control to the caller. This will prevents any subsequent
removal of the module.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reported-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Fixes: 4f8206b88286 ("s390/ap: driver callback to indicate resource in use")
Link: https://lore.kernel.org/r/20220706222619.602094-1-akrowiak@linux.ibm.com
Cc: stable@vger.kernel.org
[agordeev@linux.ibm.com fixed description, added Fixes and Link]
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Commit 4efd417f298b ("s390: raise minimum supported machine generation
to z10") removed the usage of alternatives and lowcore in expolines
macros. Remove unneeded header includes as well.
With that, expoline.S doesn't require asm-offsets.h and
expoline_prepare target dependency could be removed.
Tested-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://lore.kernel.org/r/patch-2.thread-d13b6c.git-d13b6c96fb5f.your-ad-here.call-01656331067-ext-4899@work.hours
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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When CONFIG_EXPOLINE_EXTERN is used expoline thunks are generated
from arch/s390/lib/expoline.S and postlinked into every module.
This is also true for external modules. Add expoline.o build to
the modules_prepare target.
Fixes: 1d2ad084800e ("s390/nospec: add an option to use thunk-extern")
Reported-by: Joe Lawrence <joe.lawrence@redhat.com>
Tested-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Tested-by: C. Erastus Toe <ctoe@redhat.com>
Tested-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://lore.kernel.org/r/patch-1.thread-d13b6c.git-a2387a74dc49.your-ad-here.call-01656331067-ext-4899@work.hours
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki
"Fix recent regression in the cpufreq mediatek driver related to
incorrect handling of regulator_get_optional() return value
(AngeloGioacchino Del Regno)"
* tag 'pm-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: mediatek: Handle sram regulator probe deferral
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git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Pull a cpufreq ARM fix for 5.19-rc7 from Viresh Kumar:
- mediatek: Handle sram regulator probe deferral
* tag 'cpufreq-arm-fixes-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
cpufreq: mediatek: Handle sram regulator probe deferral
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If the regulator_get_optional() call for the SRAM regulator returns
a probe deferral, we must bail out and retry probing later: failing
to do this will produce unstabilities on platforms requiring the
handling for this regulator.
Fixes: ffa7bdf7f344 ("cpufreq: mediatek: Make sram regulator optional")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"Fix more fallout from recent changes of the ACPI CPPC handling on AMD
platforms (Mario Limonciello)"
* tag 'acpi-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: CPPC: Fix enabling CPPC on AMD systems with shared memory
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When commit 72f2ecb7ece7 ("ACPI: bus: Set CPPC _OSC bits for all
and when CPPC_LIB is supported") was introduced, we found collateral
damage that a number of AMD systems that supported CPPC but
didn't advertise support in _OSC stopped having a functional
amd-pstate driver. The _OSC was only enforced on Intel systems at that
time.
This was fixed for the MSR based designs by commit 8b356e536e69f
("ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported")
but some shared memory based designs also support CPPC but haven't
advertised support in the _OSC. Add support for those designs as well by
hardcoding the list of systems.
Fixes: 72f2ecb7ece7 ("ACPI: bus: Set CPPC _OSC bits for all and when CPPC_LIB is supported")
Fixes: 8b356e536e69f ("ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported")
Link: https://lore.kernel.org/all/3559249.JlDtxWtqDm@natalenko.name/
Cc: 5.18+ <stable@vger.kernel.org> # 5.18+
Reported-and-tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk fix from Petr Mladek:
- Make pr_flush() fast when consoles are suspended.
* tag 'printk-for-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
printk: do not wait for consoles when suspended
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The console_stop() and console_start() functions call pr_flush().
When suspending, these functions are called by the serial subsystem
while the serial port is suspended. In this scenario, if there are
any pending messages, a call to pr_flush() will always result in a
timeout because the serial port cannot make forward progress. This
causes longer suspend and resume times.
Add a check in pr_flush() so that it will immediately timeout if
the consoles are suspended.
Fixes: 3b604ca81202 ("printk: add pr_flush()")
Reported-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Tested-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20220715061042.373640-2-john.ogness@linutronix.de
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Currently the jitter mechanism will require two timer ticks per
iteration, and it requires N iterations per bit. This N is determined
with a small measurement, and if it's too big, it won't waste time with
jitter entropy because it'd take too long or not have sufficient entropy
anyway.
With the current max N of 32, there are large timeouts on systems with a
small CONFIG_HZ. Rather than set that maximum to 32, instead choose a
factor of CONFIG_HZ. In this case, 1/30 seems to yield sane values for
different configurations of CONFIG_HZ.
Reported-by: Vladimir Murzin <vladimir.murzin@arm.com>
Fixes: 78c768e619fb ("random: vary jitter iterations based on cycle counter speed")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When running with return thunks enabled under 32-bit EFI, the system
crashes with:
kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle page fault for address: 000000005bc02900
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0011) - permissions violation
PGD 18f7063 P4D 18f7063 PUD 18ff063 PMD 190e063 PTE 800000005bc02063
Oops: 0011 [#1] PREEMPT SMP PTI
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc6+ #166
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:0x5bc02900
Code: Unable to access opcode bytes at RIP 0x5bc028d6.
RSP: 0018:ffffffffb3203e10 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000048
RDX: 000000000190dfac RSI: 0000000000001710 RDI: 000000007eae823b
RBP: ffffffffb3203e70 R08: 0000000001970000 R09: ffffffffb3203e28
R10: 747563657865206c R11: 6c6977203a696665 R12: 0000000000001710
R13: 0000000000000030 R14: 0000000001970000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8e013ca00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0018 ES: 0018 CR0: 0000000080050033
CR2: 000000005bc02900 CR3: 0000000001930000 CR4: 00000000000006f0
Call Trace:
? efi_set_virtual_address_map+0x9c/0x175
efi_enter_virtual_mode+0x4a6/0x53e
start_kernel+0x67c/0x71e
x86_64_start_reservations+0x24/0x2a
x86_64_start_kernel+0xe9/0xf4
secondary_startup_64_no_verify+0xe5/0xeb
That's because it cannot jump to the return thunk from the 32-bit code.
Using a naked RET and marking it as safe allows the system to proceed
booting.
Fixes: aa3d480315ba ("x86: Use return-thunk in asm code")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: <stable@vger.kernel.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- A fix to avoid printing a warning when modules do not exercise any
errata-dependent behavior and the SiFive errata are enabled.
- A fix to the Microchip PFSOC to attach the L2 cache to the CPU nodes.
* tag 'riscv-for-linus-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: don't warn for sifive erratas in modules
riscv: dts: microchip: hook up the mpfs' l2cache
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git://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git into fixes
Microchip RISC-V devicetree fixes for 5.19-rc6
A single fix for mpfs.dtsi:
- The l2 cache controller was never hooked up in the dt, so userspace
is presented with the wrong topology information, so it has been
hooked up.
* tag 'dt-fixes-for-palmer-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git:
riscv: dts: microchip: hook up the mpfs' l2cache
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The initial PolarFire SoC devicetree must have been forked off from
the fu540 one prior to the addition of l2cache controller support being
added there. When the controller node was added to mpfs.dtsi, it was
not hooked up to the CPUs & thus sysfs reports an incorrect cache
configuration. Hook it up.
Fixes: 0fa6107eca41 ("RISC-V: Initial DTS for Microchip ICICLE board")
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Daire McNamara <daire.mcnamara@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
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The SiFive errata code contains code checking applicable erratas
vs. actually applied erratas to suggest missing erratas to the
user when their Kconfig options are not enabled.
In the main kernel image one can be quite sure that all available
erratas appear at least once, so that check will succeed.
On the other hand modules can very well not use any errata-relevant
code, so the newly added module-alternative support may also patch
the module code, but not touch SiFive-specific erratas at all.
So to restore the original behaviour don't warn when patching
modules. This will keep the warning if necessary for the main kernel
image but prevent spurious warnings for modules.
Of course having such a vendor-specific warning may not be needed at
all, as CONFIG_ERRATA_SIFIVE is selected by CONFIG_SOC_SIFIVE and the
individual erratas are default-y so disabling them requires
deliberate action anyway. But for now just restore the old behaviour.
Fixes: a8e910168bba ("riscv: implement module alternatives")
Reported-by: Ron Economos <re@w6rz.net>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Ron Economos <re@w6rz.net>
Link: https://lore.kernel.org/r/20220608120849.1695191-1-heiko@sntech.de
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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Pull KVM fixes from Paolo Bonzini:
"RISC-V:
- Fix missing PAGE_PFN_MASK
- Fix SRCU deadlock caused by kvm_riscv_check_vcpu_requests()
x86:
- Fix for nested virtualization when TSC scaling is active
- Estimate the size of fastcc subroutines conservatively, avoiding
disastrous underestimation when return thunks are enabled
- Avoid possible use of uninitialized fields of 'struct
kvm_lapic_irq'
Generic:
- Mark as such the boolean values available from the statistics file
descriptors
- Clarify statistics documentation"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: emulate: do not adjust size of fastop and setcc subroutines
KVM: x86: Fully initialize 'struct kvm_lapic_irq' in kvm_pv_kick_cpu_op()
Documentation: kvm: clarify histogram units
kvm: stats: tell userspace which values are boolean
x86/kvm: fix FASTOP_SIZE when return thunks are enabled
KVM: nVMX: Always enable TSC scaling for L2 when it was enabled for L1
RISC-V: KVM: Fix SRCU deadlock caused by kvm_riscv_check_vcpu_requests()
riscv: Fix missing PAGE_PFN_MASK
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Instead of doing complicated calculations to find the size of the subroutines
(which are even more complicated because they need to be stringified into
an asm statement), just hardcode to 16.
It is less dense for a few combinations of IBT/SLS/retbleed, but it has
the advantage of being really simple.
Cc: stable@vger.kernel.org # 5.15.x: 84e7051c0bc1: x86/kvm: fix FASTOP_SIZE when return thunks are enabled
Cc: stable@vger.kernel.org
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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'vector' and 'trig_mode' fields of 'struct kvm_lapic_irq' are left
uninitialized in kvm_pv_kick_cpu_op(). While these fields are normally
not needed for APIC_DM_REMRD, they're still referenced by
__apic_accept_irq() for trace_kvm_apic_accept_irq(). Fully initialize
the structure to avoid consuming random stack memory.
Fixes: a183b638b61c ("KVM: x86: make apic_accept_irq tracepoint more generic")
Reported-by: syzbot+d6caa905917d353f0d07@syzkaller.appspotmail.com
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220708125147.593975-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Merge bugfix needed in both 5.19 (because it's bad) and 5.20 (because
it is a prerequisite to test new features).
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Windows 10/11 guests with Hyper-V role (WSL2) enabled are observed to
hang upon boot or shortly after when a non-default TSC frequency was
set for L1. The issue is observed on a host where TSC scaling is
supported. The problem appears to be that Windows doesn't use TSC
frequency for its guests even when the feature is advertised and KVM
filters SECONDARY_EXEC_TSC_SCALING out when creating L2 controls from
L1's. This leads to L2 running with the default frequency (matching
host's) while L1 is running with an altered one.
Keep SECONDARY_EXEC_TSC_SCALING in secondary exec controls for L2 when
it was set for L1. TSC_MULTIPLIER is already correctly computed and
written by prepare_vmcs02().
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20220712135009.952805-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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In the case of histogram statistics, the values are always sample
counts; the unit instead applies to the bucket range. For example,
halt_poll_success_hist is a nanosecond statistic because the buckets are
for 0ns, 1ns, 2-3ns, 4-7ns etc. There isn't really any other sensible
interpretation, but clarify this anyway in the Documentation.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Some of the statistics values exported by KVM are always only 0 or 1.
It can be useful to export this fact to userspace so that it can track
them specially (for example by polling the value every now and then to
compute a % of time spent in a specific state).
Therefore, add "boolean value" as a new "unit". While it is not exactly
a unit, it walks and quacks like one. In particular, using the type
would be wrong because boolean values could be instantaneous or peak
values (e.g. "is the rmap allocated?") or even two-bucket histograms
(e.g. "number of posted vs. non-posted interrupt injections").
Suggested-by: Amneesh Singh <natto@weirdnatto.in>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The return thunk call makes the fastop functions larger, just like IBT
does. Consider a 16-byte FASTOP_SIZE when CONFIG_RETHUNK is enabled.
Otherwise, functions will be incorrectly aligned and when computing their
position for differently sized operators, they will executed in the middle
or end of a function, which may as well be an int3, leading to a crash
like:
[ 36.091116] int3: 0000 [#1] SMP NOPTI
[ 36.091119] CPU: 3 PID: 1371 Comm: qemu-system-x86 Not tainted 5.15.0-41-generic #44
[ 36.091120] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014
[ 36.091121] RIP: 0010:xaddw_ax_dx+0x9/0x10 [kvm]
[ 36.091185] Code: 00 0f bb d0 c3 cc cc cc cc 48 0f bb d0 c3 cc cc cc cc 0f 1f 80 00 00 00 00 0f c0 d0 c3 cc cc cc cc 66 0f c1 d0 c3 cc cc cc cc <0f> 1f 80 00 00 00 00 0f c1 d0 c3 cc cc cc cc 48 0f c1 d0 c3 cc cc
[ 36.091186] RSP: 0018:ffffb1f541143c98 EFLAGS: 00000202
[ 36.091188] RAX: 0000000089abcdef RBX: 0000000000000001 RCX: 0000000000000000
[ 36.091188] RDX: 0000000076543210 RSI: ffffffffc073c6d0 RDI: 0000000000000200
[ 36.091189] RBP: ffffb1f541143ca0 R08: ffff9f1803350a70 R09: 0000000000000002
[ 36.091190] R10: ffff9f1803350a70 R11: 0000000000000000 R12: ffff9f1803350a70
[ 36.091190] R13: ffffffffc077fee0 R14: 0000000000000000 R15: 0000000000000000
[ 36.091191] FS: 00007efdfce8d640(0000) GS:ffff9f187dd80000(0000) knlGS:0000000000000000
[ 36.091192] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 36.091192] CR2: 0000000000000000 CR3: 0000000009b62002 CR4: 0000000000772ee0
[ 36.091195] PKRU: 55555554
[ 36.091195] Call Trace:
[ 36.091197] <TASK>
[ 36.091198] ? fastop+0x5a/0xa0 [kvm]
[ 36.091222] x86_emulate_insn+0x7b8/0xe90 [kvm]
[ 36.091244] x86_emulate_instruction+0x2f4/0x630 [kvm]
[ 36.091263] ? kvm_arch_vcpu_load+0x7c/0x230 [kvm]
[ 36.091283] ? vmx_prepare_switch_to_host+0xf7/0x190 [kvm_intel]
[ 36.091290] complete_emulated_mmio+0x297/0x320 [kvm]
[ 36.091310] kvm_arch_vcpu_ioctl_run+0x32f/0x550 [kvm]
[ 36.091330] kvm_vcpu_ioctl+0x29e/0x6d0 [kvm]
[ 36.091344] ? kvm_vcpu_ioctl+0x120/0x6d0 [kvm]
[ 36.091357] ? __fget_files+0x86/0xc0
[ 36.091362] ? __fget_files+0x86/0xc0
[ 36.091363] __x64_sys_ioctl+0x92/0xd0
[ 36.091366] do_syscall_64+0x59/0xc0
[ 36.091369] ? syscall_exit_to_user_mode+0x27/0x50
[ 36.091370] ? do_syscall_64+0x69/0xc0
[ 36.091371] ? syscall_exit_to_user_mode+0x27/0x50
[ 36.091372] ? __x64_sys_writev+0x1c/0x30
[ 36.091374] ? do_syscall_64+0x69/0xc0
[ 36.091374] ? exit_to_user_mode_prepare+0x37/0xb0
[ 36.091378] ? syscall_exit_to_user_mode+0x27/0x50
[ 36.091379] ? do_syscall_64+0x69/0xc0
[ 36.091379] ? do_syscall_64+0x69/0xc0
[ 36.091380] ? do_syscall_64+0x69/0xc0
[ 36.091381] ? do_syscall_64+0x69/0xc0
[ 36.091381] entry_SYSCALL_64_after_hwframe+0x61/0xcb
[ 36.091384] RIP: 0033:0x7efdfe6d1aff
[ 36.091390] Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 77 1f 48 8b 44 24 18 64 48 2b 04 25 28 00
[ 36.091391] RSP: 002b:00007efdfce8c460 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 36.091393] RAX: ffffffffffffffda RBX: 000000000000ae80 RCX: 00007efdfe6d1aff
[ 36.091393] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000c
[ 36.091394] RBP: 0000558f1609e220 R08: 0000558f13fb8190 R09: 00000000ffffffff
[ 36.091394] R10: 0000558f16b5e950 R11: 0000000000000246 R12: 0000000000000000
[ 36.091394] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
[ 36.091396] </TASK>
[ 36.091397] Modules linked in: isofs nls_iso8859_1 kvm_intel joydev kvm input_leds serio_raw sch_fq_codel dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua ipmi_devintf ipmi_msghandler drm msr ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel virtio_net net_failover crypto_simd ahci xhci_pci cryptd psmouse virtio_blk libahci xhci_pci_renesas failover
[ 36.123271] ---[ end trace db3c0ab5a48fabcc ]---
[ 36.123272] RIP: 0010:xaddw_ax_dx+0x9/0x10 [kvm]
[ 36.123319] Code: 00 0f bb d0 c3 cc cc cc cc 48 0f bb d0 c3 cc cc cc cc 0f 1f 80 00 00 00 00 0f c0 d0 c3 cc cc cc cc 66 0f c1 d0 c3 cc cc cc cc <0f> 1f 80 00 00 00 00 0f c1 d0 c3 cc cc cc cc 48 0f c1 d0 c3 cc cc
[ 36.123320] RSP: 0018:ffffb1f541143c98 EFLAGS: 00000202
[ 36.123321] RAX: 0000000089abcdef RBX: 0000000000000001 RCX: 0000000000000000
[ 36.123321] RDX: 0000000076543210 RSI: ffffffffc073c6d0 RDI: 0000000000000200
[ 36.123322] RBP: ffffb1f541143ca0 R08: ffff9f1803350a70 R09: 0000000000000002
[ 36.123322] R10: ffff9f1803350a70 R11: 0000000000000000 R12: ffff9f1803350a70
[ 36.123323] R13: ffffffffc077fee0 R14: 0000000000000000 R15: 0000000000000000
[ 36.123323] FS: 00007efdfce8d640(0000) GS:ffff9f187dd80000(0000) knlGS:0000000000000000
[ 36.123324] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 36.123325] CR2: 0000000000000000 CR3: 0000000009b62002 CR4: 0000000000772ee0
[ 36.123327] PKRU: 55555554
[ 36.123328] Kernel panic - not syncing: Fatal exception in interrupt
[ 36.123410] Kernel Offset: 0x1400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 36.135305] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---
Fixes: aa3d480315ba ("x86: Use return-thunk in asm code")
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Co-developed-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Message-Id: <20220713171241.184026-1-cascardo@canonical.com>
Tested-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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into HEAD
KVM/riscv fixes for 5.19, take #2
- Fix missing PAGE_PFN_MASK
- Fix SRCU deadlock caused by kvm_riscv_check_vcpu_requests()
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The kvm_riscv_check_vcpu_requests() is called with SRCU read lock held
and for KVM_REQ_SLEEP request it will block the VCPU without releasing
SRCU read lock. This causes KVM ioctls (such as KVM_IOEVENTFD) from
other VCPUs of the same Guest/VM to hang/deadlock if there is any
synchronize_srcu() or synchronize_srcu_expedited() in the path.
To fix the above in kvm_riscv_check_vcpu_requests(), we should do SRCU
read unlock before blocking the VCPU and do SRCU read lock after VCPU
wakeup.
Fixes: cce69aff689e ("RISC-V: KVM: Implement VCPU interrupts and requests handling")
Reported-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
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There are a bunch of functions that use the PFN from a page table entry
that end up with the svpbmt upper-bits because they are missing the newly
introduced PAGE_PFN_MASK which leads to wrong addresses conversions and
then crash: fix this by adding this mask.
Fixes: 100631b48ded ("riscv: Fix accessing pfn bits in PTEs for non-32bit variants")
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
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Pull ceph fix from Ilya Dryomov:
"A folio locking fixup that Xiubo and David cooperated on, marked for
stable. Most of it is in netfs but I picked it up into ceph tree on
agreement with David"
* tag 'ceph-for-5.19-rc7' of https://github.com/ceph/ceph-client:
netfs: do not unlock and put the folio twice
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