Export iov_iter_restore so that it can be used by modules.
This is needed by the virtio vsock transport (which can be built as a
module) to restore the msg_iter state when transmission fails.
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Octavian Purdila <tavip@google.com>
Message-ID: <20260622222757.2130402-2-tavip@google.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Includes a merge of 7.2-rc2 to pick up the changes around
mod_devicetable.h and reduce resulting conflicts around includes.
New device support
------------------
adi,ad3530R
- Add support for the AD3532R and AD3532 16 channel DACs.
adi,ad4080
- Add support for the AD4883 ADC.
adi,ad5686
- Add support for AD5313R, AD5317R, AD5674, AD5687R, AD5689, AD5689R DACs
over SPI
- Add support for AD5316R, AD5674, AD5697R and AD5696 DACs over I2C
- Significant driver refactoring prior to these additions, partly to reduce
bus traffic and to add triggered buffer and gain control support. An
earlier set added support for missing supplies, reset and LDAC GPIO.
adi,adf41513
- New driver to support this PLL frequency synthesizer that runs up to
26.5 GHz.
- Included infrastructure to handle higher precision attributes with
extensive tests
adi,ltc2378-20
- New driver supporting LTC2338, LTC2364, LTC2367, LTC2368, LT2369, LTC2370
LTC2376, LTC2377, LTC2378, LTC2379 and LTC23980 ADCs with both high speed
capture via appropriate backend and conventional triggered buffer SPI
capture.
invensense,icm42607
- New driver for this IMU.
mediateck,mt6323
- New driver for this PMIC ADC.
microchip,mcp47a1
- New driver for this I2C 6 bit DAC.
nxp,mcf54415-dac
- New driver for this DAC found in NXP SoCs.
qst,qmc5884l
- New driver for this 3 axis magnetometer. Included dt vendor entry for qst.
qst,qmc6308
- New driver for this 3 axis magnetometer.
sensiron,slf3s
- New driver for this liquid flow sensor. Includes adding IIO_VOLUMEFLOW
channel type.
st,vl53l1x
- Refactors to improve readability.
ti,ads112c14
- New driver supporting the ADS112C14 and ADS122C14 ADCs. These bring
some new ABI for input chopping, particular useful for resistive sensors
like thermocouples or Wheatstone bridges.
- Support CRC8 detection of corruption on the bus.
- Support buffered reads.
ti,tmp117
- (trivial) Add support for the tmp119 temperature sensor.
xilinx,versal-sysmon
- New ADC driver for this block found on various FPGAs including various
bus interfaces, threshold and oversampling support.
dt binding updates
------------------
new shared bindings
- excitation-channels and excitation-current-nanoamp allow per channel
specification of currents used for resistive sensor measurement.
- reference-sources property to allow selection of a per channel reference.
rockchip,saradc
- Add RV1106 which is compatible with the RV3588.
Features
--------
buffer-dmaengine
- Allow cyclic buffers, useful for repeating sequence generation with DACs.
devantech,dmard09
- Implement read back of channel scale - previously interface always
returned an error.
hid,sensors-als
- Enable separate channel scaling for hardware that supports it.
invensense,timestamp library
- Various precision improvements.
invensense,icm42600
- Add support for hwfifo watermark interfaces.
taos,tcs3472
- Support wait time and sampling frequency control.
Cleanups, minor fixes
---------------------
Minor cleanups not mentioned at all in this summary such
as white space fixes or typos.
Affecting various drivers
- Cleanup of conditionals that had no affect.
- Drop some runtime pm local wrappers as now runtime_pm does the
mark_last_busy part inside the put, these provide no useful code
deduplication or readability advantages over directly calling the
runtime_pm functions.
- Return 0 from write_raw() on success.
- Use of dev_err_probe() to simplify code and sometimes provide useful
info for deferred probe debugging.
- Drop some redundant error prints where the called function already
provides information on errors.
- Make some read only arrays in functions static.
- Fix up missing handling of regcache_sync() errors.
- Drop some false kernel-doc markings.
- Add missing MODULE_DEVICE_TABLE for some of_match_id tables.
- Use local variables for things like the struct device to shorten and
improve readability of code.
- Drop some unused structure elements.
- Reorder dds.h macro parameters to be inline with others.
- Header reorders and IWYU. Often part of a more significant series.
- Remove abstractions designed to allow a driver to support multiple device
types, when they have been around a long time and only the original part
showed up.
- Initialize spi_device_id arrays using member names following dropping of
driver data from drivers that didn't actually use it.
- Catch up with i2c_device_id tables added since previous effort to use
named initializers for all those.
- Use kernel types in a few places instead of standard C ones or bare
unsigned.
Misc
- Update Xilinx AMS maintainer.
- Update email address for Maxwell Doose.
- Update email address for Siratul Islam.
- Update email address for Tomasz Duszynski and re-add Tomasz to
various maintainer entries.
Docs
- Encourage use of differential channel naming even when there is no
flexibility in input to differential pair mapping. Intended to
provide a strong signal to userspace that a channel is differential.
adi,ad_sigma_delta
- Allow COMPILE_TEST without any users.
adi,ad2s1201
- Refactor trigger handler to avoid mix of guard() and goto.
adi,ad5686
- Avoid potential NULL dereference is user forces a driver bind.
adi,ad5696
- Add a couple of missing entries to the of_match_id table and update
binding to match.
atmel,ad91_adc
- Use const char * for DT string property allowing a cast to be dropped.
avia,hx711
- Various refactors and cleanup to enable support of additional parts
(to come)
- Add missing supply and gpio dt-bindings.
bosch,bmc150
- Harden against device reporting too large a FIFO sample count.
- Use FIELD_PREP() / FIELD_GET() to improve readability.
freescale,fxls8962af
- Harden against device reporting too large a FIFO sample count.
hid-sensors-*
- Reorder probe to not expose userspace interfaces until the rest of
the setup is done to avoid potentially dropping data.
honeywell,abp2030pa
- Drop an unreachable return.
invensens,icm45600
- Harden against bad value of FIFO sample count from device.
- Use i2c_match_data if firmware table sourced match data isn't available.
nxp,mpl1115
- Ensure runtime_pm is balanced on error in probe.
rohm,bm1390
- Make the driver slightly more likely to recover from transient errors.
sensiron,sgp30
- Handle thread creation errors.
st,lsm6dsx
- Update the enable mask when doing sensor fusion to avoid incorrect fifo
data handling.
st,stm32-dfsdm
- Treat dt flags as booleans.
ti,ads1015
- Switch to devm helpers which simplified code and closed a resource leak.
ti,opt3001
- Split complicated opt3001_get_processed() logic into irq an no irq
helper functions.
- Use devm to simplify code.
- Use guard() to simplify code.
- Reorder probe so final call exposes userspace interfaces.
- Various other more minor cleanup
taos,tsl2772
- Fix calibscale readback to check right channel type.
taos,tsl2583
- Use sysfs_emit() and sysfs_emit_at() to replace open coded equivalents.
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Merge tag 'iio-for-7.3a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next
Jonathan writes:
IIO new device support, features, cleanup for 7.3
Includes a merge of 7.2-rc2 to pick up the changes around
mod_devicetable.h and reduce resulting conflicts around includes.
New device support
------------------
adi,ad3530R
- Add support for the AD3532R and AD3532 16 channel DACs.
adi,ad4080
- Add support for the AD4883 ADC.
adi,ad5686
- Add support for AD5313R, AD5317R, AD5674, AD5687R, AD5689, AD5689R DACs
over SPI
- Add support for AD5316R, AD5674, AD5697R and AD5696 DACs over I2C
- Significant driver refactoring prior to these additions, partly to reduce
bus traffic and to add triggered buffer and gain control support. An
earlier set added support for missing supplies, reset and LDAC GPIO.
adi,adf41513
- New driver to support this PLL frequency synthesizer that runs up to
26.5 GHz.
- Included infrastructure to handle higher precision attributes with
extensive tests
adi,ltc2378-20
- New driver supporting LTC2338, LTC2364, LTC2367, LTC2368, LT2369, LTC2370
LTC2376, LTC2377, LTC2378, LTC2379 and LTC23980 ADCs with both high speed
capture via appropriate backend and conventional triggered buffer SPI
capture.
invensense,icm42607
- New driver for this IMU.
mediateck,mt6323
- New driver for this PMIC ADC.
microchip,mcp47a1
- New driver for this I2C 6 bit DAC.
nxp,mcf54415-dac
- New driver for this DAC found in NXP SoCs.
qst,qmc5884l
- New driver for this 3 axis magnetometer. Included dt vendor entry for qst.
qst,qmc6308
- New driver for this 3 axis magnetometer.
sensiron,slf3s
- New driver for this liquid flow sensor. Includes adding IIO_VOLUMEFLOW
channel type.
st,vl53l1x
- Refactors to improve readability.
ti,ads112c14
- New driver supporting the ADS112C14 and ADS122C14 ADCs. These bring
some new ABI for input chopping, particular useful for resistive sensors
like thermocouples or Wheatstone bridges.
- Support CRC8 detection of corruption on the bus.
- Support buffered reads.
ti,tmp117
- (trivial) Add support for the tmp119 temperature sensor.
xilinx,versal-sysmon
- New ADC driver for this block found on various FPGAs including various
bus interfaces, threshold and oversampling support.
dt binding updates
------------------
new shared bindings
- excitation-channels and excitation-current-nanoamp allow per channel
specification of currents used for resistive sensor measurement.
- reference-sources property to allow selection of a per channel reference.
rockchip,saradc
- Add RV1106 which is compatible with the RV3588.
Features
--------
buffer-dmaengine
- Allow cyclic buffers, useful for repeating sequence generation with DACs.
devantech,dmard09
- Implement read back of channel scale - previously interface always
returned an error.
hid,sensors-als
- Enable separate channel scaling for hardware that supports it.
invensense,timestamp library
- Various precision improvements.
invensense,icm42600
- Add support for hwfifo watermark interfaces.
taos,tcs3472
- Support wait time and sampling frequency control.
Cleanups, minor fixes
---------------------
Minor cleanups not mentioned at all in this summary such
as white space fixes or typos.
Affecting various drivers
- Cleanup of conditionals that had no affect.
- Drop some runtime pm local wrappers as now runtime_pm does the
mark_last_busy part inside the put, these provide no useful code
deduplication or readability advantages over directly calling the
runtime_pm functions.
- Return 0 from write_raw() on success.
- Use of dev_err_probe() to simplify code and sometimes provide useful
info for deferred probe debugging.
- Drop some redundant error prints where the called function already
provides information on errors.
- Make some read only arrays in functions static.
- Fix up missing handling of regcache_sync() errors.
- Drop some false kernel-doc markings.
- Add missing MODULE_DEVICE_TABLE for some of_match_id tables.
- Use local variables for things like the struct device to shorten and
improve readability of code.
- Drop some unused structure elements.
- Reorder dds.h macro parameters to be inline with others.
- Header reorders and IWYU. Often part of a more significant series.
- Remove abstractions designed to allow a driver to support multiple device
types, when they have been around a long time and only the original part
showed up.
- Initialize spi_device_id arrays using member names following dropping of
driver data from drivers that didn't actually use it.
- Catch up with i2c_device_id tables added since previous effort to use
named initializers for all those.
- Use kernel types in a few places instead of standard C ones or bare
unsigned.
Misc
- Update Xilinx AMS maintainer.
- Update email address for Maxwell Doose.
- Update email address for Siratul Islam.
- Update email address for Tomasz Duszynski and re-add Tomasz to
various maintainer entries.
Docs
- Encourage use of differential channel naming even when there is no
flexibility in input to differential pair mapping. Intended to
provide a strong signal to userspace that a channel is differential.
adi,ad_sigma_delta
- Allow COMPILE_TEST without any users.
adi,ad2s1201
- Refactor trigger handler to avoid mix of guard() and goto.
adi,ad5686
- Avoid potential NULL dereference is user forces a driver bind.
adi,ad5696
- Add a couple of missing entries to the of_match_id table and update
binding to match.
atmel,ad91_adc
- Use const char * for DT string property allowing a cast to be dropped.
avia,hx711
- Various refactors and cleanup to enable support of additional parts
(to come)
- Add missing supply and gpio dt-bindings.
bosch,bmc150
- Harden against device reporting too large a FIFO sample count.
- Use FIELD_PREP() / FIELD_GET() to improve readability.
freescale,fxls8962af
- Harden against device reporting too large a FIFO sample count.
hid-sensors-*
- Reorder probe to not expose userspace interfaces until the rest of
the setup is done to avoid potentially dropping data.
honeywell,abp2030pa
- Drop an unreachable return.
invensens,icm45600
- Harden against bad value of FIFO sample count from device.
- Use i2c_match_data if firmware table sourced match data isn't available.
nxp,mpl1115
- Ensure runtime_pm is balanced on error in probe.
rohm,bm1390
- Make the driver slightly more likely to recover from transient errors.
sensiron,sgp30
- Handle thread creation errors.
st,lsm6dsx
- Update the enable mask when doing sensor fusion to avoid incorrect fifo
data handling.
st,stm32-dfsdm
- Treat dt flags as booleans.
ti,ads1015
- Switch to devm helpers which simplified code and closed a resource leak.
ti,opt3001
- Split complicated opt3001_get_processed() logic into irq an no irq
helper functions.
- Use devm to simplify code.
- Use guard() to simplify code.
- Reorder probe so final call exposes userspace interfaces.
- Various other more minor cleanup
taos,tsl2772
- Fix calibscale readback to check right channel type.
taos,tsl2583
- Use sysfs_emit() and sysfs_emit_at() to replace open coded equivalents.
* tag 'iio-for-7.3a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (232 commits)
iio: dac: mcp47a1: add support for new device
dt-bindings: iio: dac: add support for mcp47a1
iio: Update email for Maxwell Doose
iio: imu: st_lsm6dsx: Update enable mask when using sensor fusion
iio: light: cm32181: return zero after writing calibscale
iio: flow: add Sensirion SLF3S liquid flow sensor driver
iio: core: add IIO_VAL_DECIMAL64_FEMTO format type
dt-bindings: iio: flow: add Sensirion SLF3S liquid flow sensor
iio: types: add IIO_VOLUMEFLOW channel type
iio: ABI: Encourage differential voltage ABI usage
iio: adc: ltc2378: Add support for LTC2338-18
iio: adc: ltc2378: Enable triggered buffer data capture
iio: adc: ltc2378: Enable high-speed data capture
iio: adc: ltc2378: Add support for LTC2378-20 and similar ADCs
dt-bindings: iio: adc: Add ltc2378
iio: magnetometer: ak8974: remove conditional return with no effect
iio: light: tsl2583: remove conditional return with no effect
iio: adc: rcar-gyroadc: remove rcar_gyroadc_set_power() helper
iio: light: vcnl4000: remove vcnl4000_set_pm_runtime_state() helper
iio: light: vcnl4035: remove vcnl4035_set_pm_runtime_state() helper
...
- Consolidate the VDSO datastore further and provide support for
mlock_all() and prefaulting.
- Provide 32-bit legacy time related functionality only if
CONFIG_COMPAT_32BIT_TIME is enabled. The config switch exists, but
architecture code still exposes the legacy functionality even disabled.
Clean this up by adding the missing guards and validating at build time
that the VDSO is legacy free if disabled.
- Consolidate the VDSO related config options in core and drivers, which
removes some non-sensical dependencies and quite an amount of #ifdeffery.
- Clean up the PAGE_SIZE definition maze
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Merge tag 'timers-vdso-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull VDSO updates from Thomas Gleixner:
- Consolidate the VDSO datastore further and provide support for
mlock_all() and prefaulting.
- Provide 32-bit legacy time related functionality only if
CONFIG_COMPAT_32BIT_TIME is enabled. The config switch exists,
but architecture code still exposes the legacy functionality even
disabled.
Clean this up by adding the missing guards and validating at build
time that the VDSO is legacy free if disabled.
- Consolidate the VDSO related config options in core and drivers,
which removes some non-sensical dependencies and quite an amount of
#ifdeffery.
- Clean up the PAGE_SIZE definition maze
* tag 'timers-vdso-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
random: vDSO: Drop custom PAGE_SIZE definitions
LoongArch: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery
clocksource/drivers/timer-riscv: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery
clocksource/drivers/arm_arch_timer: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery
clocksource/drivers/mips-gic-timer: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery
MIPS: csrc-r4k: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery
vDSO: Make clockmode constants available without CONFIG_GENERIC_GETTIMEOFDAY
kbuild: Support generated asm-headers in subdirectories
vdso: Rename HAVE_GENERIC_VDSO to VDSO_DATASTORE
vdso: Drop HAVE_GENERIC_VDSO from architecture kconfig files
vdso: Automatically select HAVE_GENERIC_VDSO if necessary
MIPS: vdso: Stop using CONFIG_HAVE_GENERIC_VDSO
vdso: Remove the dependency on HAVE_GENERIC_VDSO from ARCH_HAS_VDSO_ARCH_DATA
futex: Remove dependency on HAVE_GENERIC_VDSO from FUTEX_ROBUST_UNLOCK
vdso/gettimeofday: Verify COMPAT_32BIT_TIME interactions
sparc: vdso: Respect COMPAT_32BIT_TIME
MIPS: VDSO: Respect COMPAT_32BIT_TIME
powerpc/vdso: Respect COMPAT_32BIT_TIME
ARM: VDSO: Respect COMPAT_32BIT_TIME
arm64: vdso32: Respect COMPAT_32BIT_TIME
...
Futexes:
- Use runtime constants for futex_hash computation
(K Prateek Nayak, Peter Zijlstra)
- Optimise the size check get_futex_key() (Sebastian Andrzej Siewior)
- Avoid private hash use-after-free on final put (Felix Hoffmann)
- Tell kmemleak we're not leaking __futex_queues (Peter Zijlstra)
Rust integration updates:
- Implement refcounted interrupt disable and SpinLockIrq for Rust
(Boqun Feng, Heiko Carstens, Joel Fernandes, Lyude Paul)
- Rust sync: add helpers for mb, dma_mb and friends;
add generic memory barriers and use LKMM atomics
instead of Rust atomics in the revocable code (Gary Guo)
- Add abstraction and integrate synchronize_rcu() (Philipp Stanner)
Lock debugging:
- Add qspinlock contended_release tracepoint
(Dmitry Ilvokhin, Peter Zijlstra)
- Enable the printing of held locks of remote running tasks and print
task CPU (Ingo Molnar)
- percpu-rwsem: Annotate intentional data race in readers_active_check()
(Sun Shaojie)
Misc fixes and updates by Boqun Feng, Peter Zijlstra, Fangrui Song,
Naveen Kumar Chaudhary and Thomas Huth.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-core-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"Futexes:
- Use runtime constants for futex_hash computation (K Prateek Nayak,
Peter Zijlstra)
- Optimise the size check get_futex_key() (Sebastian Andrzej Siewior)
- Avoid private hash use-after-free on final put (Felix Hoffmann)
- Tell kmemleak we're not leaking __futex_queues (Peter Zijlstra)
Rust integration updates:
- Implement refcounted interrupt disable and SpinLockIrq for Rust
(Boqun Feng, Heiko Carstens, Joel Fernandes, Lyude Paul)
- Rust sync: add helpers for mb, dma_mb and friends; add generic
memory barriers and use LKMM atomics instead of Rust atomics in the
revocable code (Gary Guo)
- Add abstraction and integrate synchronize_rcu() (Philipp Stanner)
Lock debugging:
- Add qspinlock contended_release tracepoint (Dmitry Ilvokhin, Peter
Zijlstra)
- Enable the printing of held locks of remote running tasks and print
task CPU (Ingo Molnar)
- percpu-rwsem: Annotate intentional data race in readers_active_check()
(Sun Shaojie)
Misc fixes and updates by Boqun Feng, Peter Zijlstra, Fangrui Song,
Naveen Kumar Chaudhary and Thomas Huth"
* tag 'locking-core-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
rust: sync: Introduce SpinLockIrq::lock_with() and friends
rust: sync: Add SpinLockIrq
rust: sync: Use super::* in spinlock.rs
rust: helper: Add spin_{un,}lock_irq_{enable,disable}() helpers
rust: Introduce interrupt module
s390/preempt: Enable HAS_SEPARATE_PREEMPT_RESCHED_BITS
arm64: sched/preempt: Enable HAS_SEPARATE_PREEMPT_RESCHED_BITS
preempt: Introduce HAS_SEPARATE_PREEMPT_RESCHED_BITS
sched: Avoid signed comparison of preempt_count() in __cant_migrate()
sched: Remove the unused preempt_offset parameter of __cant_sleep()
locking: Switch to _irq_{disable,enable}() variants in cleanup guards
irq: Add KUnit test for refcounted interrupt enable/disable
irq,spin_lock: Add counted interrupt disabling/enabling
openrisc: Include <linux/cpumask.h> in smp.h
preempt: Introduce __preempt_count_{sub,add}_return()
preempt: Introduce HARDIRQ_DISABLE_BITS
preempt: Track NMI nesting to separate per-CPU counter
futex: Tell kmemleak we're not leaking __futex_queues
x86/paravirt: Trace contended_release on unlock
tracing/lock: Use TRACE_EVENT_FN() for contended_release
...
Fixes and new kunit and tool, enables new configs, and updates
documentation:
-- kunit: configs: enable GPIO kunit test cases in all_tests.config
-- kunit: string-stream: Replace strlcat() with strscpy() and seq_buf
-- kunit: configs: enable GPIO kunit test cases in all_tests.config
-- Documentation: kunit: Test Kconfig entries shouldn't select other
configs
-- Documentation: kunit: Fix outdated FAQ entries
Adds ability to skip entire test suites and an example test suite that
can be skipped at runtime.
-- kunit,rust: Add ability to skip entire test suites
-- kunit: Add example of test suite that can be skipped at runtime
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Merge tag 'linux_kselftest-kunit-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kunit updates from Shuah Khan:
"Fixes and new kunit and tools, enable new configs:
- configs: enable GPIO kunit test cases in all_tests.config
- string-stream: Replace strlcat() with strscpy() and seq_buf
- configs: enable GPIO kunit test cases in all_tests.config
Documentation:
- Test config entries shouldn't select other configs
- Fix outdated FAQ entries
Add the ability to skip entire test suites and an example test suite
that can be skipped at runtime:
- Add ability to skip entire test suites
- Add example of test suite that can be skipped at runtime"
* tag 'linux_kselftest-kunit-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: tool: fix _list_tests filtering wrong variable when list has TAP prefix
kunit: configs: enable GPIO kunit test cases in all_tests.config
kunit: string-stream: Replace strlcat() with strscpy() and seq_buf
Documentation: kunit: Fix outdated FAQ entries
Documentation: kunit: Test Kconfig entries shouldn't select other configs
kunit: Add example of test suite that can be skipped at runtime
kunit,rust: Add ability to skip entire test suites
- Add comprehensive KUnit test suites for the new AES-GCM and AES-CCM
library APIs.
- Add FIPS self-tests for all the AES encryption modes. This is needed
for parity with the traditional crypto API.
- Fix a couple more issues in the IRQ test helper.
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Merge tag 'libcrypto-tests-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux
Pull crypto library test updates from Eric Biggers:
- Add comprehensive KUnit test suites for the new AES-GCM and AES-CCM
library APIs
- Add FIPS self-tests for all the AES encryption modes. This is needed
for parity with the traditional crypto API
- Fix a couple more issues in the IRQ test helper
* tag 'libcrypto-tests-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux:
lib/crypto: aes-cmac: Use __cleanup() instead of memzero_explicit()
kunit: irq: Unregister on-stack timer and work from debugobjects
kunit: irq: Continue increasing hrtimer interval for longer
lib/crypto: tests: Add KUnit test suite for AES-GCM
lib/crypto: tests: Add KUnit test suite for AES-CCM
lib/crypto: tests: Add aead-test-template.h
lib/crypto: tests: Use per-test-case buffers in hash tests
lib/crypto: tests: Create test-utils.h
lib/crypto: aes: Add FIPS self-tests for GCM and CCM
lib/crypto: aes: Add FIPS self-tests for unauthenticated modes
lib/crypto: fips: Split fips.h into fips-aes.h and fips-sha.h
Add library APIs for most AES encryption modes that are used in the
kernel (ECB, CBC, CBC-CTS, CTR, XCTR, XTS, GCM, CCM).
These AES modes have many in-kernel users that are currently using the
crypto_skcipher or crypto_aead APIs. These existing APIs are difficult
to use and inefficient. Until now, the lack of proper library support
for these has been the main gap in the crypto library.
This set of changes is the next stage of addressing it:
- Implement the new APIs on top of the existing support for
single-block AES in the library.
- Fully document the new APIs.
- Migrate the only user of the old AES-GCM library API to the new,
more flexible API; then remove the old API and its implementation.
- Wire up the new APIs to the traditional crypto API by adding
crypto_skcipher and crypto_aead algorithms.
This makes the new APIs be covered by the traditional crypto API's
self-tests. It also makes them be already used for real on systems
that don't have architecture-optimized code for these modes.
But most importantly, this is a prerequisite for migrating the
architecture-optimized code for these AES modes (i.e.
arch/*/crypto/aes*) into the library, which as usual will
eliminate a lot of redundant "glue" code.
Note that unlike some of the other algorithms that have been migrated
to the library, e.g. SHA-512, for these AES modes there was too much
to get done in one cycle. Nor did it make sense to handle these modes
one at a time, because they tend to be coupled together or depend on
each other, especially in the architecture-optimized AES code.
Thus, most of the benefits (reductions in lines of code, performance
improvements, etc.) will follow in later cycles when
architecture-optimized code is migrated into the library and users of
crypto_skcipher and crypto_aead are updated to use the new APIs.
The design of the new APIs was informed by writing proof-of-concept
patches for many kernel subsystems currently accessing these same
algorithms via crypto_skcipher or crypto_aead (patches 18-33 of
https://lore.kernel.org/r/20260707053503.209874-1-ebiggers@kernel.org/).
While those patches will be resent for real later, the total diffstat
for them was negative 1905 lines. So clearly the new APIs are quite a
bit easier to use and align better with what users actually need.
Besides the new AES encryption APIs, there are also a few changes for
improved AES-CMAC key and context zeroization.
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Merge tag 'libcrypto-updates-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux
Pull crypto library updates from Eric Biggers:
"Add library APIs for most AES encryption modes that are used in the
kernel (ECB, CBC, CBC-CTS, CTR, XCTR, XTS, GCM, CCM).
These AES modes have many in-kernel users that are currently using the
crypto_skcipher or crypto_aead APIs. These existing APIs are difficult
to use and inefficient. Until now, the lack of proper library support
for these has been the main gap in the crypto library.
This set of changes is the next stage of addressing it:
- Implement the new APIs on top of the existing support for
single-block AES in the library.
- Fully document the new APIs.
- Migrate the only user of the old AES-GCM library API to the new,
more flexible API; then remove the old API and its implementation.
- Wire up the new APIs to the traditional crypto API by adding
crypto_skcipher and crypto_aead algorithms.
This makes the new APIs be covered by the traditional crypto API's
self-tests. It also makes them be already used for real on systems
that don't have architecture-optimized code for these modes.
But most importantly, this is a prerequisite for migrating the
architecture-optimized code for these AES modes (i.e.
arch/*/crypto/aes*) into the library, which as usual will eliminate
a lot of redundant "glue" code.
Note that unlike some of the other algorithms that have been migrated
to the library, e.g. SHA-512, for these AES modes there was too much
to get done in one cycle. Nor did it make sense to handle these modes
one at a time, because they tend to be coupled together or depend on
each other, especially in the architecture-optimized AES code.
Thus, most of the benefits (reductions in lines of code, performance
improvements, etc.) will follow in later cycles when
architecture-optimized code is migrated into the library and users of
crypto_skcipher and crypto_aead are updated to use the new APIs.
The design of the new APIs was informed by writing proof-of-concept
patches for many kernel subsystems currently accessing these same
algorithms via crypto_skcipher or crypto_aead (patches 18-33 of
https://lore.kernel.org/r/20260707053503.209874-1-ebiggers@kernel.org/).
While those patches will be resent for real later, the total diffstat
for them was negative 1905 lines. So clearly the new APIs are quite a
bit easier to use and align better with what users actually need.
Besides the new AES encryption APIs, there are also a few changes for
improved AES-CMAC key and context zeroization"
* tag 'libcrypto-updates-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux:
mac80211: fils_aead: Use __cleanup() instead of memzero_explicit()
Bluetooth: SMP: clear the aes_cmac_key when done
smb: clear the aes_cmac_key and aes_cmac_ctx when done
lib/crypto: aes-cmac: Add zeroization functions
lib/crypto: aesgcm: Remove old AES-GCM library
x86/sev: Remove obsolete virtual address check
x86/sev: Use new AES-GCM library
crypto: aes - Add CCM support using library
crypto: aes - Add GCM support using library
crypto: aes - Add XTS support using library
crypto: aes - Add CTR and XCTR support using library
crypto: aes - Add CBC and CBC-CTS support using library
crypto: aes - Add ECB support using library
lib/crypto: aes: Add CCM support
lib/crypto: aes: Add GCM support
lib/crypto: aes: Add XTS support
lib/crypto: aes: Add CTR and XCTR support
lib/crypto: aes: Add CBC and CBC-CTS support
lib/crypto: aes: Add ECB support
crypto: xts - Split out __xts_verify_key() helper
Please consider pulling these changes from the signed vfs-7.3-rc1.misc tag.
Thanks!
Christian
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Merge tag 'vfs-7.3-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull misc vfs updates from Christian Brauner:
"Bigger cleanups:
- The lockref dead-count handling is tidied up.
The open-coded check for a count below zero as the dead marker
relies on information the caller should not have.
- make put_mnt_ns() leave mounts connected. Destroying a mount
namespace disconnected its mounts from their mount points. So a
file descriptor still open on the parent of a mount point could be
used to peek under it.
Locked mounts were already kept connected to prevent exactly that.
But a mount is only locked when its tree is copied across a user
namespace boundary. So a mount namespace set up by a privileged
component had no locked mounts and its mounts were disconnected.
Passing UMOUNT_CONNECTED keeps every mount connected and prevents
that bug.
- vfs_prepare_mode() passes S_IFDIR for directories. I meant to fix
that ago but didn't get to it. So now someone finally did it.
This kills the exception where the mode could be 0 when a directory
was created whereas every other creation operation passed it
explicitly already.
- move long delayed work for ufs, jffs2, hfsplus, hfs and affs from
the per-cpu system_long_wq to the new unbound system_dfl_long_wq.
None of that work relies on per-cpu state and the work item is
enqueued with queue_delayed_work() whose timer is global anyway. So
it may as well benefit from scheduler task placement.
Smaller fixes and cleanups:
- unlock_buffer() and journal_end_buffer_io_sync() use
clear_and_wake_up_bit()
- the pipe page pools are unified into a single per-pipe pool and the
extra wake_up(rd_wait) is limited to EPOLLET consumers
- eventpoll now computes its timer slack lazily in ep_poll()
- shrink_dcache_for_umount() keeps making progress on busy roots
- excess xarray nodes are freed in clear_inode()
- romfs detects hard link cycles
- the user path of nested backing files is fixed
- pidfd holds exec_update_lock around the namespace ioctl
- non-memcg-aware nr_cached_objects is skipped during memcg slab
shrink
- iomap_write_iter() always returns status
- mangle_path() is renamed to seq_mangle_path()
- inode timestamp accessors are annotated
- new regression test for pipe->poll_usage.
- a few documentation, kernel-doc and selftest fixes"
* tag 'vfs-7.3-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (67 commits)
selftests/namespaces: Fix racy pipe handshake in timens and pidns_separate
selftests/epoll: add a regression test for pipe->poll_usage
pipe: only enable the extra wake_up(rd_wait) for EPOLLET consumers
pidfd: hold exec_update_lock around namespace ioctl
fs: fix user path of nested backing files
fs: remove stale inode_insert5() kernel-doc parameter
fs: fix switch/case indentation in sysfs() syscall
fs: document semantics of kstat::{uid,gid} fields
dcache: keep shrink_dcache_for_umount() making progress on busy roots
seq_file: rename mangle_path to seq_mangle_path
nstree: add/fix struct ns_id_req kernel-doc member fields
dcache: use lockref routines for dead count checks
lockref: tidy up dead count handling
initramfs: fix typo in reserve_initrd_mem comment
fs/pipe: unify the page pools into a single per-pipe pool
fs: annotate inode timestamp accessors
eventpoll: compute timer slack lazily in ep_poll()
selftests/filesystems: add mntns cleanup test
put_mnt_ns(): leave mounts connected
affs: Move long delayed work on system_dfl_long_wq
...
The help text still says the feature only covers mutexes, but blocker
tracking has since been extended to semaphores and rwsems. Update the
description to match the supported lock types.
Link: https://lore.kernel.org/20260730061854.176547-1-wangxb12@chinatelecom.cn
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Xibo Wang <wangxb12@chinatelecom.cn>
Suggested-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reduce the number of uint32_t <-> size_t conversions a little.
Eliminating such conversions entirely would require changing almost all
uint32_t to size_t, which would look confusing and increase the sizes of
the structs even more. Going the other way, converting everything to
uint32_t, isn't possible because the input and output buffers use size_t
in struct xz_buf.
Now both arguments to min() have the same type. This is required to for
compatibility with PowerPC boot code[1] whose min() is strict like
include/linux/minmax.h was before the commit d03eba99f5 ("minmax: allow
min()/max()/clamp() if the arguments have the same signedness.").
Swap the order of the "state" and "len" in struct lzma_dec to avoid
padding in the middle of the struct when size_t is 64 bits. The
reordering doesn't change the size of the struct; the padding just appears
at the end instead.
dict_flush() used to truncate size_t to uint32_t when returning. This
wasn't a bug; the value is always small enough.
Link: https://lore.kernel.org/20260614160521.924710-1-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://lore.kernel.org/lkml/20260610232323.GA1071374@ax162/ [1]
Reviewed-by: Thorsten Blum <thorsten.blum@linux.dev>
Cc: David Laight <david.laight.linux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Use the simpler min() macro since the values are unsigned and compatible.
Link: https://lore.kernel.org/20260609150030.634570-1-lasse.collin@tukaani.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Lasse Collin <lasse.collin@tukaani.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
By using __cleanup(aes_cmac_zeroize_key) for clearing the key data, we
can save one line of code here.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Link: https://patch.msgid.link/20260807125845.1477067-6-thuth@redhat.com
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Add a KUnit test suite for the AES-GCM library API.
It consists of:
- All the shared test cases from aead-test-template.h. These include
extensive consistency tests, a "Monte-Carlo test", and a benchmark.
- Tests against hardcoded AES-GCM test vectors from external sources.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802233005.161467-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Add a KUnit test suite for the AES-CCM library API.
It consists of:
- All the shared test cases from aead-test-template.h. These include
extensive consistency tests, a "Monte-Carlo test", and a benchmark.
- Tests against hardcoded AES-CCM test vectors from external sources.
- Tests for CCM-specific message length validation.
To generate the expected aes_ccm_monte_carlo_checksum[] value, add a
script gen-aead-testvecs.py which computes it using python-cryptography.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802233005.161467-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Add aead-test-template.h which contains shared test logic for AEAD
algorithms. It's similar to the existing hash-test-template.h, which
contains shared test logic for hash algorithms.
The initial use cases for this will be AES-CCM and AES-GCM.
It may be used by the existing ChaCha20Poly1305 test suite in the future
as well, though the ChaCha20Poly1305 API currently lacks some of the
functionality that the "template" expects to be present.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802233005.161467-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Make the test cases more self-contained by replacing the test suite
scoped guarded buffer ('test_buf') with buffers allocated by each test
case using the helper functions in test-utils.h.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802233005.161467-3-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Move hash-test-template's test RNG code and the buffer allocation code
from various test suites into a header test-utils.h. This allows them
to be shared by other test suites.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802233005.161467-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Upcoming changes will wire up architecture-optimized implementations of
GCM and CCM. FIPS labs can consider such designs to meet the threshold
for separate self-tests to be needed.
Therefore, add FIPS self-tests for encryption and decryption in these
modes.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802222408.91757-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Upcoming changes will wire up architecture-optimized implementations of
ECB, CBC, CBC-CTS, CTR, and XTS. FIPS labs can consider such designs to
meet the threshold for separate self-tests to be needed.
The inverse direction of the block cipher also needs to be exercised,
which the existing CMAC self-test doesn't do.
Therefore, add FIPS self-tests for encryption and decryption in these
modes as well as the "bare" AES.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802222408.91757-3-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
In preparation for adding FIPS self-tests for AES encryption modes,
split fips.h into separate files for the AES and SHA test vectors.
They are still generated by the same script, but this keeps things a bit
more organized.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802222408.91757-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Currently, CPU backtrace functions cannot be called from loadable
modules because the underlying helper arch_trigger_cpumask_backtrace()
is not exported.
Instead of exporting arch_trigger_cpumask_backtrace() individually
across every supported architecture, introduce and export a common
helper, cpumask_backtrace(), in lib/nmi_backtrace.c. Update the four
inline CPU backtrace macros in include/linux/nmi.h to route through this
centralized helper.
Signed-off-by: Mayank Rungta <mrungta@google.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lore.kernel.org/r/20260730-export-cpu-backtrace-apis-v1-1-bace8e1cb817@google.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
- Fix lockdep warning regression in rhashtable.
- Fix default authsize in rfc4309.
- Fix gcm cryptlen calculation in tegra.
- Fix qce registration error-path bug.
- Fix incorrect use of sg_dma_len before mapping in starfive.
- Allow cbc(paes) to be used with af_alg.
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Merge tag 'v7.2-p3' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
- Fix lockdep warning regression in rhashtable
- Fix default authsize in rfc4309
- Fix gcm cryptlen calculation in tegra
- Fix qce registration error-path bug
- Fix incorrect use of sg_dma_len before mapping in starfive
- Allow cbc(paes) to be used with af_alg
* tag 'v7.2-p3' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: af_alg - Allow cbc(paes)
crypto: starfive - use scatterlist length before DMA mapping
crypto: qce - fix error path in devm_qce_register_algs
rhashtable: fix false-positive lockdep splat on rhltable destruction
crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req()
crypto: ccm - Set rfc4309 maxauthsize from child
These custom definitions where added in commit 7f053812da ("random:
vDSO: minimize and simplify header includes") to avoid pulling in
non-vDSO-safe headers from linux/page.h.
vdso/page.h provides these definitions for the vDSO now. Use that instead.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260724-vdso-random-page-size-v1-1-e69283d36b2f@linutronix.de
With the changes that enable preempt count to track IRQ disabling
nesting, we don't have enough bits in 32-bit preempt count
implementation, as a result we move NMI nesting bits out of the 32-bit
preempt count. However on the architectures that can support 64-bit
preempt count implementation, we can keep the NMI nesting bits in the
32-bit preempt count and avoid maintaining NMI nesting bits outside of
the same cache line.
Therefore HAS_SEPARATE_PREEMPT_RESCHED_BITS is introduced to allow
architectures to select this. Note that under this Kconfig, preempt
count is maintained in a 64-bit word however preempt_count() still
remains as an int because all the effective bits still fit in
(previously we mask out NEED_RESCHED bit in preempt_count()). This
should make no functional changes for existing preempt_count() users.
Enable this for x86_64 along with the introduction of the Kconfig.
[boqun: Undo the __preempt_count_{add,sub}() optimization in 32-bit
preempt count since it may introduce {over,under}flow]
Originally-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Boqun Feng <boqun@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260804161447.84806-11-boqun@kernel.org
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Merge tag 'v7.2-rc7' into driver-core-next
We need the driver-core fixes in here as well to build on top of.
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
struct bvec_iter::bi_bvec_done is used an offset in the current bvec,
let's rename it accordingly for better clarity. I also plan to use it
for non-bvec based iteration in the future like dma-buf, so drop the
"bvec" part.
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/4e4c21858705a200bd8848ffe4080522e3eb5c1c.1786018753.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
kvcalloc with the __GFP_NOFAIL flag will never return NULL, so the
subsequent NULL checks are unreachable dead code. Remove them.
Link: https://lore.kernel.org/20260724022851.466017-6-gouhao@uniontech.com
Signed-off-by: Gou Hao <gouhao@uniontech.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Cc: Bharat Potnuri <bharat@chelsio.com>
Cc: Cédric Le Goater <clg@kaod.org>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: jiazhenyuan <jiazhenyuan@uniontech.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nam Cao <namcao@linutronix.de>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Nilay Shroff <nilay@linux.ibm.com>
Cc: Shrikanth Hegde <sshegde@linux.ibm.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
syzbot is reporting KCOV state corruption on PREEMPT_RT kernels, for the
temporary storage used for saving/restoring remote KCOV state is currently
allocated as the per-CPU area.
On PREEMPT_RT kernels, softirq handlers run as preemptible task threads
(e.g., ksoftirqd). If a softirq context preempts a task running a remote
KCOV session, it safely saves the task's state into the per-CPU area.
However, if that softirq thread is subsequently preempted by a higher-
priority softirq thread on the same CPU, the second softirq will overwrite
the same per-CPU area, permanently destroying the original task's KCOV
state.
Fix this data corruption by moving the temporary storage from the per-CPU
area to the per-thread area. Since each softirq thread now owns its own
task context, nested softirq preemption no longer causes data overwrites.
Note that while the temporary storage is now on a per-thread basis, the
per-CPU kcov_percpu_data.lock must be retained, for we need to ensure that
kcov_remote_start() and kcov_remote_stop() operate atomically without
racing against asynchronous interrupts that manipulate the current task's
KCOV state.
It is likely that GFP_KERNEL allocation by vmalloc_node() in kcov_init()
has already called panic() before returning NULL, for there will be no
OOM-killable userspace processes when __init function of built-in module
runs. But this patch also fixes crashing the kernel when vmalloc_node()
in kcov_init() returned NULL, for kcov_init() left per-CPU irq_area == NULL
but kcov_remote_start() depends on per-CPU irq_area != NULL, resulting in
(1) doing vmalloc() in kcov_remote_start() despite !in_task() context
(2) out-of-array-bounds access if (1) succeeded but
kcov->remote_size < CONFIG_KCOV_IRQ_AREA_SIZE
(3) always leak memory allocated by (1), eventually killing all
OOM-killable userspace processes
problems.
Link: https://lore.kernel.org/43552d09-2ce2-4b19-b0d3-a2d1ab952145@I-love.SAKURA.ne.jp
Reported-by: syzbot+3f51ad7ac3ae57a6fdcc@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=3f51ad7ac3ae57a6fdcc
Reported-by: syzbot+47cf95ca1f9dcca872c8@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=47cf95ca1f9dcca872c8
Reported-by: syzbot+8a173e13208949931dc7@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=8a173e13208949931dc7
Reported-by: syzbot+90984d3713722683112e@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=90984d3713722683112e
Analyzed-by: AI Mode in Google Search (no mail address)
Fixes: 5ff3b30ab5 ("kcov: collect coverage from interrupts")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Marco Elver <elver@google.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
checkpatch.pl reports a total of 18 incorrect use of spaces instead of
tabulations in lib/ucs2_string.c.
Apply
./scripts/checkpatch.pl --fix-inplace lib/ucs2_string.c
to fix them all.
Link: https://lore.kernel.org/20260723-fix-ucs2_strnlen-v2-2-9ea94e32a358@kernel.org
Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
Cc: Kees Cook <kees@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "lib/ucs2_string.c: fix out-of-bounds read in
ucs2_strnlen()", v2.
This series fixes an off-by-one out-of-bounds read in ucs2_strnlen().
The first patch is the real fix, the second patch comes as a bonus and
fixes the code indentation.
This patch (of 2):
ucs2_strnlen() checks the current character before checking whether the
caller-provided maximum length has been reached. If the input is not
NUL-terminated within that bound, the loop can read one ucs2_char_t past
the limit.
Test the length before dereferencing to prevent an off-by-one
out-of-bounds read.
Link: https://lore.kernel.org/20260723-fix-ucs2_strnlen-v2-0-9ea94e32a358@kernel.org
Link: https://lore.kernel.org/20260723-fix-ucs2_strnlen-v2-1-9ea94e32a358@kernel.org
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
Cc: Kees Cook <kees@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
CONFIG_SYSCTL used to make sense as a separate hidden bool before commit
61a47c1ad3 ("sysctl: Remove the sysctl system call"); it was selected
by both CONFIG_SYSCTL_SYSCALL and CONFIG_PROC_SYSCTL.
Today CONFIG_PROC_SYSCTL is the only selector, so the two are always
equal. Kill the hidden bool, rename the PROC_SYSCTL prompt to SYSCTL,
and s/CONFIG_PROC_SYSCTL/CONFIG_SYSCTL/ tree-wide.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Joel Granados <joel.granados@kernel.org>
Add test_hmm coverage for the HMM lock-dropping fault path. The test
module gets a new HMM_DMIRROR_READ_UNLOCKED ioctl that calls
hmm_range_fault_unlocked_timeout() with a timeout of 0, exercising the
unbounded retry mode while allowing the mmap lock to be dropped during
fault handling.
Add a userfaultfd_read selftest that registers an anonymous mapping with
UFFDIO_REGISTER_MODE_MISSING, services the faults from a handler thread
with UFFDIO_COPY, and verifies that HMM can read back the data supplied by
the handler. This exercises the path where handle_mm_fault() drops
mmap_lock and hmm_range_fault_unlocked_timeout() restarts the walk
internally.
Assisted-by: GitHub-Copilot:claude-opus-4.6
Link: https://lore.kernel.org/20260723-hmm-v10-v11-3-c55b003a4b61@gmail.com
Signed-off-by: Stanislav Kinsburskii <skinsburskii@gmail.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Dave Airlie <airlied@gmail.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lizhi Hou <lizhi.hou@amd.com>
Cc: Long Li <longli@microsoft.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Lyude <lyude@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Oded Gabbay <ogabbay@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add the required space before the opening parenthesis in switch statements
to conform to kernel coding style.
Link: https://lore.kernel.org/20260623061730.2024-1-git@tazy.dev
Signed-off-by: Watson Wheeler <git@tazy.dev>
Reviewed-by: Liam Howlett <liam@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
When slub_kunit is not built-in, call kfree_rcu() and kfree_rcu_nolock()
to test kfree_rcu_nolock() in slub_kunit.
Rename the test case as the test covers more _nolock() APIs.
Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Signed-off-by: Harry Yoo (Oracle) <harry@kernel.org>
Link: https://patch.msgid.link/20260729-kfree_rcu_nolock-v5-8-a28cdcda9673@kernel.org
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Add a benchmark to test the RAID 6 P/Q functions for more representative
block sizes and numbers of disks. This splits the maximum alloc size used
for the benchmark from the max size for the kunit test because recovery is
currently limited to a single page at a time. Hopefully this will be
fixed soon.
The runtime numbers are reported in GB/s as the numbers of modern
implementations are basically unreadable as MB/s. This means
retro-architectures could report 0, but that is an easy tradeoff.
Link: https://lore.kernel.org/20260715144825.95432-9-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Use plain ktime_get_ns for the timing, use 8 + 2 disks for a realistic
load, and report the throughput on the data disks as that is what storage
systems are measured on.
Link: https://lore.kernel.org/20260715144825.95432-8-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Don't hold up early boot and defer the selection just like we've been
doing for the RAID5 XOR code since commit 524ccdbdfb ("crypto: xor -
defer load time benchmark to a later time").
This will also allow full use of the timing subsystem for benchmarking.
Link: https://lore.kernel.org/20260715144825.95432-7-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The code doesn't have any locking, so this is trivial.
Link: https://lore.kernel.org/20260715144825.95432-6-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add a benchmark to test the XOR functions for more representative block
sizes and numbers of disks. Including 64k would be useful here, but
increasing the test buffer size increases the runtime of the functional
kunit test too much unfortunately.
The runtime numbers are reported in GB/s as the numbers of modern
implementations are basically unreadable as MB/s. This means
retro-architectures could report 0, but that is an easy tradeoff.
Link: https://lore.kernel.org/20260715144825.95432-5-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Use plain ktime_get_ns for the timing, use 4 + 1 disks for a realistic
load, and report the throughput on the data disks instead of the that on
the parity disk, which isn't all that useful.
Link: https://lore.kernel.org/20260715144825.95432-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "misc lib/raid/ improvements v2".
This series improves the benchmark-based algorithm selection and adds
kunit benchmarks for both the XOR and raid6 libraries, and tidies up a few
very minor other bits.
This patch (of 8):
The code doesn't have any locking, so this is trivial.
Link: https://lore.kernel.org/20260715144825.95432-1-hch@lst.de
Link: https://lore.kernel.org/20260715144825.95432-2-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This reverts commit 8901ac9d2c.
The commit 94bfc7f3b0 ("err.h: use __always_inline on all error pointer
helpers") fixes the problem with a dead code elimination by always
inlining IS_ERR() function. It prevents the related linker failures as
well.
The workaround with disabling branch profiling is not longer necessary.
Link: https://lore.kernel.org/20260707135522.120447-1-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Closes: https://lore.kernel.org/r/ah6WDkwO8eYY5f2a@ashevche-desk.local
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Aleksander Lobakin <aleksander.lobakin@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: David Laight <david.laight.linux@gmail.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Convert the existing prandom selftest (lib/random32.c) to use the KUnit
framework (lib/tests/random32_kunit.c). Unlike typical KUnit tests, this
file is directly #included into lib/random32.c.
The new test:
- Removes the legacy CONFIG_RANDOM32_SELFTEST from lib/random32.c.
- Adds CONFIG_PRANDOM_KUNIT_TEST (defaulting to KUNIT_ALL_TESTS).
- Moves the test logic to lib/tests/random32_kunit.c.
This commit is verified by `./tools/testing/kunit/kunit.py run`
with the .kunit/.kunitconfig:
CONFIG_KUNIT=y
CONFIG_PRANDOM_KUNIT_TEST=y
Link: https://lore.kernel.org/20260703050100.23944-1-note351@hotmail.com
Signed-off-by: Kir Chou <note351@hotmail.com>
Reviewed-by: David Gow <davidgow@google.com>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Jakub Kacinski <kuba@kernel.org>
Cc: Kuan-Wei Chiu <visitorckw@gmail.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Simon Horman <horms@kernel.org>
Cc: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add a KUnit test suite for the polynomial_calc() function, which had no
in-kernel test coverage. The tests verify correct evaluation of constant,
linear, quadratic, and cubic polynomials, including negative coefficients,
negative input data, zero-coefficient terms.
The Kconfig entry uses 'select POLYNOMIAL' rather than 'depends on
POLYNOMIAL' because POLYNOMIAL is a promptless tristate that cannot
be manually enabled on UML without an explicit selector.
Link: https://lore.kernel.org/20260606030319.316752-1-adinata.softwareengineer@gmail.com
Signed-off-by: Adi Nata <adinata.softwareengineer@gmail.com>
Cc: Maxim Kaurkin <maxim.kaurkin@baikalelectronics.ru>
Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <david@davidgow.net>
Cc: Rae Moar <raemoar63@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
memchr_inv() takes a size_t length but counts 8 byte words in an unsigned
int. At 32GiB that count wraps, so the scan can quietly miss most of the
range.
Use size_t for the word count.
Link: https://lore.kernel.org/20260621121133.16460-1-include@grrlz.net
Fixes: 798248206b ("lib/string.c: introduce memchr_inv()")
Signed-off-by: Bradley Morgan <include@grrlz.net>
Cc: Akinbou Mita <akinobu.mita@gmail.com>
Cc: Andy Shevchenko <andy@kernel.org>
Cc: Christoph Lameer <cl@linux-foundation.org>
Cc: Joern Engel <joern@logfs.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
