- RCU-tasks update, including addition of RCU Tasks Trace for
BPF use and TASKS_RUDE_RCU
- kfree_rcu() updates.
- Remove scheduler locking restriction
- RCU CPU stall warning updates.
- Torture-test updates.
- Miscellaneous fixes and other updates.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'core-rcu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
"The RCU updates for this cycle were:
- RCU-tasks update, including addition of RCU Tasks Trace for BPF use
and TASKS_RUDE_RCU
- kfree_rcu() updates.
- Remove scheduler locking restriction
- RCU CPU stall warning updates.
- Torture-test updates.
- Miscellaneous fixes and other updates"
* tag 'core-rcu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (103 commits)
rcu: Allow for smp_call_function() running callbacks from idle
rcu: Provide rcu_irq_exit_check_preempt()
rcu: Abstract out rcu_irq_enter_check_tick() from rcu_nmi_enter()
rcu: Provide __rcu_is_watching()
rcu: Provide rcu_irq_exit_preempt()
rcu: Make RCU IRQ enter/exit functions rely on in_nmi()
rcu/tree: Mark the idle relevant functions noinstr
x86: Replace ist_enter() with nmi_enter()
x86/mce: Send #MC singal from task work
x86/entry: Get rid of ist_begin/end_non_atomic()
sched,rcu,tracing: Avoid tracing before in_nmi() is correct
sh/ftrace: Move arch_ftrace_nmi_{enter,exit} into nmi exception
lockdep: Always inline lockdep_{off,on}()
hardirq/nmi: Allow nested nmi_enter()
arm64: Prepare arch_nmi_enter() for recursion
printk: Disallow instrumenting print_nmi_enter()
printk: Prepare for nested printk_nmi_enter()
rcutorture: Convert ULONG_CMP_LT() to time_before()
torture: Add a --kasan argument
torture: Save a few lines by using config_override_param initially
...
logic, instead of the current per debug facility blacklist, use the more generic
.noinstr.text approach, combined with a 'noinstr' marker for functions.
Also add instrumentation_begin()/end() to better manage the exact place in entry
code where instrumentation may be used.
Also add a kprobes blacklist for modules.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'core-kprobes-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull kprobes updates from Ingo Molnar:
"Various kprobes updates, mostly centered around cleaning up the
no-instrumentation logic.
Instead of the current per debug facility blacklist, use the more
generic .noinstr.text approach, combined with a 'noinstr' marker for
functions.
Also add instrumentation_begin()/end() to better manage the exact
place in entry code where instrumentation may be used.
And add a kprobes blacklist for modules"
* tag 'core-kprobes-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
kprobes: Prevent probes in .noinstr.text section
vmlinux.lds.h: Create section for protection against instrumentation
samples/kprobes: Add __kprobes and NOKPROBE_SYMBOL() for handlers.
kprobes: Support NOKPROBE_SYMBOL() in modules
kprobes: Support __kprobes blacklist in modules
kprobes: Lock kprobe_mutex while showing kprobe_blacklist
their width from CPUID. As a prerequsite, streamline and unify the CPUID
detection of the respective resource control attributes. By Reinette
Chatre.
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Merge tag 'x86_cache_updates_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cache resource control updates from Borislav Petkov:
"Add support for wider Memory Bandwidth Monitoring counters by querying
their width from CPUID.
As a prerequsite for that, streamline and unify the CPUID detection of
the respective resource control attributes.
By Reinette Chatre"
* tag 'x86_cache_updates_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/resctrl: Support wider MBM counters
x86/resctrl: Support CPUID enumeration of MBM counter width
x86/resctrl: Maintain MBM counter width per resource
x86/resctrl: Query LLC monitoring properties once during boot
x86/resctrl: Remove unnecessary RMID checks
x86/cpu: Move resctrl CPUID code to resctrl/
x86/resctrl: Rename asm/resctrl_sched.h to asm/resctrl.h
value from stop_machine(), from Mihai Carabas.
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Merge tag 'x86_microcode_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 microcode update from Borislav Petkov:
"A single fix for late microcode loading to handle the correct return
value from stop_machine(), from Mihai Carabas"
* tag 'x86_microcode_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/microcode: Fix return value for microcode late loading
steppings due to the offset change of the bus number configuration
register, by Qiuxu Zhuo.
* The usual cleanups and fixes all over the place.
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Merge tag 'edac_updates_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras
Pull EDAC updates from Borislav Petkov:
- Fix i10nm_edac loading on some Ice Lake and Tremont/Jacobsville
steppings due to the offset change of the bus number configuration
register, by Qiuxu Zhuo.
- The usual cleanups and fixes all over the place.
* tag 'edac_updates_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
EDAC/amd64: Remove redundant assignment to variable ret in hw_info_get()
EDAC/skx: Use the mcmtr register to retrieve close_pg/bank_xor_enable
EDAC/i10nm: Update driver to support different bus number config register offsets
EDAC, {skx,i10nm}: Make some configurations CPU model specific
EDAC/amd8131: Remove defined but not used bridge_str
EDAC/thunderx: Make symbols static
MAINTAINERS: Remove sifive_l2_cache.c from EDAC-SIFIVE pattern
EDAC/xgene: Remove set but not used address local var
EDAC/armada_xp: Fix some log messages
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Merge tag 'printk-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- Benjamin Herrenschmidt solved a problem with non-matched console
aliases by first checking consoles defined on the command line. It is
a more conservative approach than the previous attempts.
- Benjamin also made sure that the console accessible via /dev/console
always has CON_CONSDEV flag.
- Andy Shevchenko added the %ptT modifier for printing struct time64_t.
It extends the existing %ptR handling for struct rtc_time.
- Bruno Meneguele fixed /dev/kmsg error value returned by unsupported
SEEK_CUR.
- Tetsuo Handa removed unused pr_cont_once().
... and a few small fixes.
* tag 'printk-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
printk: Remove pr_cont_once()
printk: handle blank console arguments passed in.
kernel/printk: add kmsg SEEK_CUR handling
printk: Fix a typo in comment "interator"->"iterator"
usb: pulse8-cec: Switch to use %ptT
ARM: bcm2835: Switch to use %ptT
lib/vsprintf: Print time64_t in human readable format
lib/vsprintf: update comment about simple_strto<foo>() functions
printk: Correctly set CON_CONSDEV even when preferred console was not registered
printk: Fix preferred console selection with multiple matches
printk: Move console matching logic into a separate function
printk: Convert a use of sprintf to snprintf in console_unlock
Fix kerneldoc warnings and some coding style inconsistencies.
This mirrors the similar cleanups being done in fs/crypto/.
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Merge tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt
Pull fsverity updates from Eric Biggers:
"Fix kerneldoc warnings and some coding style inconsistencies.
This mirrors the similar cleanups being done in fs/crypto/"
* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
fs-verity: remove unnecessary extern keywords
fs-verity: fix all kerneldoc warnings
- Add the IV_INO_LBLK_32 encryption policy flag which modifies the
encryption to be optimized for eMMC inline encryption hardware.
- Make the test_dummy_encryption mount option for ext4 and f2fs support
v2 encryption policies.
- Fix kerneldoc warnings and some coding style inconsistencies.
There will be merge conflicts with the ext4 and f2fs trees due to the
test_dummy_encryption change, but the resolutions are straightforward.
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Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt
Pull fscrypt updates from Eric Biggers:
- Add the IV_INO_LBLK_32 encryption policy flag which modifies the
encryption to be optimized for eMMC inline encryption hardware.
- Make the test_dummy_encryption mount option for ext4 and f2fs support
v2 encryption policies.
- Fix kerneldoc warnings and some coding style inconsistencies.
* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
fscrypt: add support for IV_INO_LBLK_32 policies
fscrypt: make test_dummy_encryption use v2 by default
fscrypt: support test_dummy_encryption=v2
fscrypt: add fscrypt_add_test_dummy_key()
linux/parser.h: add include guards
fscrypt: remove unnecessary extern keywords
fscrypt: name all function parameters
fscrypt: fix all kerneldoc warnings
- refactor pstore locking for safer module unloading (Kees Cook)
- remove orphaned records from pstorefs when backend unloaded (Kees Cook)
- refactor dump_oops parameter into max_reason (Pavel Tatashin)
- introduce pstore/zone for common code for contiguous storage (WeiXiong Liao)
- introduce pstore/blk for block device backend (WeiXiong Liao)
- introduce mtd backend (WeiXiong Liao)
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Merge tag 'pstore-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore updates from Kees Cook:
"Fixes and new features for pstore.
This is a pretty big set of changes (relative to past pstore pulls),
but it has been in -next for a while. The biggest change here is the
ability to support a block device as a pstore backend, which has been
desired for a while. A lot of additional fixes and refactorings are
also included, mostly in support of the new features.
- refactor pstore locking for safer module unloading (Kees Cook)
- remove orphaned records from pstorefs when backend unloaded (Kees
Cook)
- refactor dump_oops parameter into max_reason (Pavel Tatashin)
- introduce pstore/zone for common code for contiguous storage
(WeiXiong Liao)
- introduce pstore/blk for block device backend (WeiXiong Liao)
- introduce mtd backend (WeiXiong Liao)"
* tag 'pstore-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (35 commits)
mtd: Support kmsg dumper based on pstore/blk
pstore/blk: Introduce "best_effort" mode
pstore/blk: Support non-block storage devices
pstore/blk: Provide way to query pstore configuration
pstore/zone: Provide way to skip "broken" zone for MTD devices
Documentation: Add details for pstore/blk
pstore/zone,blk: Add ftrace frontend support
pstore/zone,blk: Add console frontend support
pstore/zone,blk: Add support for pmsg frontend
pstore/blk: Introduce backend for block devices
pstore/zone: Introduce common layer to manage storage zones
ramoops: Add "max-reason" optional field to ramoops DT node
pstore/ram: Introduce max_reason and convert dump_oops
pstore/platform: Pass max_reason to kmesg dump
printk: Introduce kmsg_dump_reason_str()
printk: honor the max_reason field in kmsg_dumper
printk: Collapse shutdown types into a single dump reason
pstore/ftrace: Provide ftrace log merging routine
pstore/ram: Refactor ftrace buffer merging
pstore/ram: Refactor DT size parsing
...
Pull crypto updates from Herbert Xu:
"API:
- Introduce crypto_shash_tfm_digest() and use it wherever possible.
- Fix use-after-free and race in crypto_spawn_alg.
- Add support for parallel and batch requests to crypto_engine.
Algorithms:
- Update jitter RNG for SP800-90B compliance.
- Always use jitter RNG as seed in drbg.
Drivers:
- Add Arm CryptoCell driver cctrng.
- Add support for SEV-ES to the PSP driver in ccp"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (114 commits)
crypto: hisilicon - fix driver compatibility issue with different versions of devices
crypto: engine - do not requeue in case of fatal error
crypto: cavium/nitrox - Fix a typo in a comment
crypto: hisilicon/qm - change debugfs file name from qm_regs to regs
crypto: hisilicon/qm - add DebugFS for xQC and xQE dump
crypto: hisilicon/zip - add debugfs for Hisilicon ZIP
crypto: hisilicon/hpre - add debugfs for Hisilicon HPRE
crypto: hisilicon/sec2 - add debugfs for Hisilicon SEC
crypto: hisilicon/qm - add debugfs to the QM state machine
crypto: hisilicon/qm - add debugfs for QM
crypto: stm32/crc32 - protect from concurrent accesses
crypto: stm32/crc32 - don't sleep in runtime pm
crypto: stm32/crc32 - fix multi-instance
crypto: stm32/crc32 - fix run-time self test issue.
crypto: stm32/crc32 - fix ext4 chksum BUG_ON()
crypto: hisilicon/zip - Use temporary sqe when doing work
crypto: hisilicon - add device error report through abnormal irq
crypto: hisilicon - remove codes of directly report device errors through MSI
crypto: hisilicon - QM memory management optimization
crypto: hisilicon - unify initial value assignment into QM
...
The big change in this release is that Matti Vaittinen has factored out
the linear ranges support into a separate library in lib/ since it is
also useful for at least the power subsystem (and most likely others
too), it helps subsystems which need to map register values into more
useful real world values do so with minimal per-driver code.
- Factoring out of the linear ranges support into a library in lib/
from Matti Vaittinen.
- Trace points for bypass mode.
- Use the consumer name in debugfs to make it easier to understand.
- New drivers for Maxim MAX77826 and MAX8998.
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Merge tag 'regulator-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator updates from Mark Brown:
"The big change in this release is that Matti Vaittinen has factored
out the linear ranges support into a separate library in lib/ since it
is also useful for at least the power subsystem (and most likely
others too), it helps subsystems which need to map register values
into more useful real world values do so with minimal per-driver code.
- Factoring out of the linear ranges support into a library in lib/
from Matti Vaittinen.
- Trace points for bypass mode.
- Use the consumer name in debugfs to make it easier to understand.
- New drivers for Maxim MAX77826 and MAX8998"
* tag 'regulator-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (23 commits)
regulator: max8998: max8998_set_current_limit() can be static
dt-bindings: regulator: Convert anatop regulator to json-schema
regulator: core: Add regulator bypass trace points
regulator: extract voltage balancing code to the separate function
regulator/mfd: max8998: Document charger regulator
regulator: max8998: Add charger regulator
MAINTAINERS: Add maintainer entry for linear ranges helper
regulator: bd718x7: remove voltage change restriction from BD71847 LDOs
lib: linear_ranges: Add missing MODULE_LICENSE()
regulator: use linear_ranges helper
power: supply: bd70528: rename linear_range to avoid collision
lib/test_linear_ranges: add a test for the 'linear_ranges'
lib: add linear ranges helpers
regulator: db8500-prcmu: Use true,false for bool variable
regulator: bd718x7: remove voltage change restriction from BD71847
regulator: max77826: Remove erroneous additionalProperties
regulator: qcom-rpmh: Fix typos in pm8150 and pm8150l
regulator: Document bindings for max77826
regulator: max77826: Add max77826 regulator driver
regulator: tps80031: remove redundant assignment to variables ret and val
...
This has been a very active release for the DesignWare driver in
particular - after a long period of inactivity we have had a lot of
people actively working on it for unrelated reasons this cycle with some
of that work still not landed. Otherwise it's been fairly quiet for the
subsystem. Highlights include:
- Lots of performance improvements and fixes for the DesignWare driver
from Serge Semin, Andy Shevchenko, Wan Ahmad Zainie, Clement Leger,
Dinh Nguyen and Jarkko Nikula.
- Support for octal mode transfers in spidev.
- Slave mode support for the Rockchip drivers.
- Support for AMD controllers, Broadcom mspi and Raspberry Pi 4,
and Intel Elkhart Lake.
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Merge tag 'spi-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown:
"This has been a very active release for the DesignWare driver in
particular - after a long period of inactivity we have had a lot of
people actively working on it for unrelated reasons this cycle with
some of that work still not landed.
Otherwise it's been fairly quiet for the subsystem.
Highlights include:
- Lots of performance improvements and fixes for the DesignWare
driver from Serge Semin, Andy Shevchenko, Wan Ahmad Zainie, Clement
Leger, Dinh Nguyen and Jarkko Nikula.
- Support for octal mode transfers in spidev.
- Slave mode support for the Rockchip drivers.
- Support for AMD controllers, Broadcom mspi and Raspberry Pi 4, and
Intel Elkhart Lake"
* tag 'spi-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (125 commits)
spi: spi-fsl-dspi: fix native data copy
spi: Convert DW SPI binding to DT schema
spi: dw: Refactor mid_spi_dma_setup() to separate DMA and IRQ config
spi: dw: Make DMA request line assignments explicit for Intel Medfield
spi: bcm2835: Remove shared interrupt support
dt-bindings: snps,dw-apb-ssi: add optional reset property
spi: dw: add reset control
spi: bcm2835: Enable shared interrupt support
spi: bcm2835: Implement shutdown callback
spi: dw: Use regset32 DebugFS method to create regdump file
spi: dw: Add DMA support to the DW SPI MMIO driver
spi: dw: Cleanup generic DW DMA code namings
spi: dw: Add DW SPI DMA/PCI/MMIO dependency on the DW SPI core
spi: dw: Remove DW DMA code dependency from DW_DMAC_PCI
spi: dw: Move Non-DMA code to the DW PCIe-SPI driver
spi: dw: Add core suffix to the DW APB SSI core source file
spi: dw: Fix Rx-only DMA transfers
spi: dw: Use DMA max burst to set the request thresholds
spi: dw: Parameterize the DMA Rx/Tx burst length
spi: dw: Add SPI Rx-done wait method to DMA-based transfer
...
This has been a very active release for the regmap API for some reason,
a lot of it due to new devices with odd requirements that can sensibly
be handled here.
- Add support for buses implementing a custom reg_update_bits()
method in case the bus has a native operation for this.
- Support 16 bit register addresses in SMBus.
- Allow customization of the device attached to regmap-irq.
- Helpers for bitfield operations and per-port field initializations.
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Merge tag 'regmap-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap updates from Mark Brown:
"This has been a very active release for the regmap API for some
reason, a lot of it due to new devices with odd requirements that can
sensibly be handled here.
- Add support for buses implementing a custom reg_update_bits()
method in case the bus has a native operation for this.
- Support 16 bit register addresses in SMBus.
- Allow customization of the device attached to regmap-irq.
- Helpers for bitfield operations and per-port field initializations"
* tag 'regmap-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: provide helpers for simple bit operations
regmap: add helper for per-port regfield initialization
regmap-i2c: add 16-bit width registers support
regmap: Simplify implementation of the regmap_field_read_poll_timeout() macro
regmap: Simplify implementation of the regmap_read_poll_timeout() macro
regmap: add reg_sequence helpers
regmap-irq: make it possible to add irq_chip do a specific device node
regmap: Add bus reg_update_bits() support
regmap: debugfs: check count when read regmap file
Infrastructure
- Add notification support
New drivers
- Baikal-T1 PVT sensor driver
- amd_energy driver to report energy counters
- Driver for Maxim MAX16601
- Gateworks System Controller
Various
- applesmc: avoid overlong udelay()
- dell-smm: Use one DMI match for all XPS models
- ina2xx: Implement alert functions
- lm70: Add support for ACPI
- lm75: Fix coding-style warnings
- lm90: Add max6654 support to lm90 driver
- nct7802: Replace container_of() API
- nct7904: Set default timeout
- nct7904: Add watchdog function
- pmbus: Improve initialization of 'currpage' and 'currphase'
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Merge tag 'hwmon-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
"Infrastructure:
- Add notification support
New drivers:
- Baikal-T1 PVT sensor driver
- amd_energy driver to report energy counters
- Driver for Maxim MAX16601
- Gateworks System Controller
Various:
- applesmc: avoid overlong udelay()
- dell-smm: Use one DMI match for all XPS models
- ina2xx: Implement alert functions
- lm70: Add support for ACPI
- lm75: Fix coding-style warnings
- lm90: Add max6654 support to lm90 driver
- nct7802: Replace container_of() API
- nct7904: Set default timeout
- nct7904: Add watchdog function
- pmbus: Improve initialization of 'currpage' and 'currphase'"
* tag 'hwmon-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (24 commits)
hwmon: Add Baikal-T1 PVT sensor driver
hwmon: Add notification support
dt-bindings: hwmon: Add Baikal-T1 PVT sensor binding
hwmon: (applesmc) avoid overlong udelay()
hwmon: (nct7904) Set default timeout
hwmon: (amd_energy) Missing platform_driver_unregister() on error in amd_energy_init()
MAINTAINERS: add entry for AMD energy driver
hwmon: (amd_energy) Add documentation
hwmon: Add amd_energy driver to report energy counters
hwmon: (nct7802) Replace container_of() API
hwmon: (lm90) Add max6654 support to lm90 driver
hwmon : (nct6775) Use kobj_to_dev() API
hwmon: (pmbus) Driver for Maxim MAX16601
hwmon: (pmbus) Improve initialization of 'currpage' and 'currphase'
hwmon: (adt7411) update contact email
hwmon: (lm75) Fix all coding-style warnings on lm75 driver
hwmon: Reduce indentation level in __hwmon_device_register()
hwmon: (ina2xx) Implement alert functions
hwmon: (lm70) Add support for ACPI
hwmon: (dell-smm) Use one DMI match for all XPS models
...
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Merge tag 'tpmdd-next-20200522' of git://git.infradead.org/users/jjs/linux-tpmdd
Pull tpm updates from Jarkko Sakkinen.
* tag 'tpmdd-next-20200522' of git://git.infradead.org/users/jjs/linux-tpmdd:
tpm: eventlog: Replace zero-length array with flexible-array member
tpm/tpm_ftpm_tee: Use UUID API for exporting the UUID
This introduces mtdpstore, which is similar to mtdoops but more
powerful. It uses pstore/blk, and aims to store panic and oops logs to
a flash partition, where pstore can later read back and present as files
in the mounted pstore filesystem.
To make mtdpstore work, the "blkdev" of pstore/blk should be set
as MTD device name or MTD device number. For more details, see
Documentation/admin-guide/pstore-blk.rst
This solves a number of issues:
- Work duplication: both of pstore and mtdoops do the same job storing
panic/oops log. They have very similar logic, registering to kmsg
dumper and storing logs to several chunks one by one.
- Layer violations: drivers should provides methods instead of polices.
MTD should provide read/write/erase operations, and allow a higher
level drivers to provide the chunk management, kmsg dump
configuration, etc.
- Missing features: pstore provides many additional features, including
presenting the logs as files, logging dump time and count, and
supporting other frontends like pmsg, console, etc.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-11-keescook@chromium.org/
Link: https://lore.kernel.org/r/1589266715-4168-1-git-send-email-liaoweixiong@allwinnertech.com
Signed-off-by: Kees Cook <keescook@chromium.org>
In order to use arbitrary block devices as a pstore backend, provide a
new module param named "best_effort", which will allow using any block
device, even if it has not provided a panic_write callback.
Link: https://lore.kernel.org/lkml/20200511233229.27745-12-keescook@chromium.org/
Signed-off-by: Kees Cook <keescook@chromium.org>
Add support for non-block devices (e.g. MTD). A non-block driver calls
pstore_blk_register_device() to register iself.
In addition, pstore/zone is updated to handle non-block devices,
where an erase must be done before a write. Without this, there is no
way to remove records stored to an MTD.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-10-keescook@chromium.org/
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
In order to configure itself, the MTD backend needs to be able to query
the current pstore configuration. Introduce pstore_blk_get_config() for
this purpose.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-9-keescook@chromium.org/
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
One requirement to support MTD devices in pstore/zone is having a
way to declare certain regions as broken. Add this support to
pstore/zone.
The MTD driver should return -ENOMSG when encountering a bad region,
which tells pstore/zone to skip and try the next one.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-8-keescook@chromium.org/
Co-developed-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: //lore.kernel.org/lkml/20200512173801.222666-1-colin.king@canonical.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Yes, staying withing 80 columns is certainly still _preferred_. But
it's not the hard limit that the checkpatch warnings imply, and other
concerns can most certainly dominate.
Increase the default limit to 100 characters. Not because 100
characters is some hard limit either, but that's certainly a "what are
you doing" kind of value and less likely to be about the occasional
slightly longer lines.
Miscellanea:
- to avoid unnecessary whitespace changes in files, checkpatch will no
longer emit a warning about line length when scanning files unless
--strict is also used
- Add a bit to coding-style about alignment to open parenthesis
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Prevent a memory leak in ioperm which was caused by the stupid
assumption that the exit cleanup is always called for current, which is
not the case when fork fails after taking a reference on the ioperm
bitmap.
- Fix an arithmething overflow in the DMA code on 32bit systems
- Fill gaps in the xstate copy with defaults instead of leaving them
uninitialized
- Revert: o"Make __X32_SYSCALL_BIT be unsigned long" as it turned out
that existing user space fails to build.
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Merge tag 'x86-urgent-2020-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A pile of x86 fixes:
- Prevent a memory leak in ioperm which was caused by the stupid
assumption that the exit cleanup is always called for current,
which is not the case when fork fails after taking a reference on
the ioperm bitmap.
- Fix an arithmething overflow in the DMA code on 32bit systems
- Fill gaps in the xstate copy with defaults instead of leaving them
uninitialized
- Revert: "Make __X32_SYSCALL_BIT be unsigned long" as it turned out
that existing user space fails to build"
* tag 'x86-urgent-2020-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ioperm: Prevent a memory leak when fork fails
x86/dma: Fix max PFN arithmetic overflow on 32 bit systems
copy_xstate_to_kernel(): don't leave parts of destination uninitialized
x86/syscalls: Revert "x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long"
current->mm check is not reliable as the mm might be temporary
due to use_mm() in a kthread. Check for PF_KTHREAD explictely.
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Merge tag 'sched-urgent-2020-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Thomas Gleixner:
"A single scheduler fix preventing a crash in NUMA balancing.
The current->mm check is not reliable as the mm might be temporary due
to use_mm() in a kthread. Check for PF_KTHREAD explictly"
* tag 'sched-urgent-2020-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Don't NUMA balance for kthreads
Pull networking fixes from David Miller:
"Another week, another set of bug fixes:
1) Fix pskb_pull length in __xfrm_transport_prep(), from Xin Long.
2) Fix double xfrm_state put in esp{4,6}_gro_receive(), also from Xin
Long.
3) Re-arm discovery timer properly in mac80211 mesh code, from Linus
Lüssing.
4) Prevent buffer overflows in nf_conntrack_pptp debug code, from
Pablo Neira Ayuso.
5) Fix race in ktls code between tls_sw_recvmsg() and
tls_decrypt_done(), from Vinay Kumar Yadav.
6) Fix crashes on TCP fallback in MPTCP code, from Paolo Abeni.
7) More validation is necessary of untrusted GSO packets coming from
virtualization devices, from Willem de Bruijn.
8) Fix endianness of bnxt_en firmware message length accesses, from
Edwin Peer.
9) Fix infinite loop in sch_fq_pie, from Davide Caratti.
10) Fix lockdep splat in DSA by setting lockless TX in netdev features
for slave ports, from Vladimir Oltean.
11) Fix suspend/resume crashes in mlx5, from Mark Bloch.
12) Fix use after free in bpf fmod_ret, from Alexei Starovoitov.
13) ARP retransmit timer guard uses wrong offset, from Hongbin Liu.
14) Fix leak in inetdev_init(), from Yang Yingliang.
15) Don't try to use inet hash and unhash in l2tp code, results in
crashes. From Eric Dumazet"
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (77 commits)
l2tp: add sk_family checks to l2tp_validate_socket
l2tp: do not use inet_hash()/inet_unhash()
net: qrtr: Allocate workqueue before kernel_bind
mptcp: remove msk from the token container at destruction time.
mptcp: fix race between MP_JOIN and close
mptcp: fix unblocking connect()
net/sched: act_ct: add nat mangle action only for NAT-conntrack
devinet: fix memleak in inetdev_init()
virtio_vsock: Fix race condition in virtio_transport_recv_pkt
drivers/net/ibmvnic: Update VNIC protocol version reporting
NFC: st21nfca: add missed kfree_skb() in an error path
neigh: fix ARP retransmit timer guard
bpf, selftests: Add a verifier test for assigning 32bit reg states to 64bit ones
bpf, selftests: Verifier bounds tests need to be updated
bpf: Fix a verifier issue when assigning 32bit reg states to 64bit ones
bpf: Fix use-after-free in fmod_ret check
net/mlx5e: replace EINVAL in mlx5e_flower_parse_meta()
net/mlx5e: Fix MLX5_TC_CT dependencies
net/mlx5e: Properly set default values when disabling adaptive moderation
net/mlx5e: Fix arch depending casting issue in FEC
...
syzbot was able to trigger a crash after using an ISDN socket
and fool l2tp.
Fix this by making sure the UDP socket is of the proper family.
BUG: KASAN: slab-out-of-bounds in setup_udp_tunnel_sock+0x465/0x540 net/ipv4/udp_tunnel.c:78
Write of size 1 at addr ffff88808ed0c590 by task syz-executor.5/3018
CPU: 0 PID: 3018 Comm: syz-executor.5 Not tainted 5.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xd3/0x413 mm/kasan/report.c:382
__kasan_report.cold+0x20/0x38 mm/kasan/report.c:511
kasan_report+0x33/0x50 mm/kasan/common.c:625
setup_udp_tunnel_sock+0x465/0x540 net/ipv4/udp_tunnel.c:78
l2tp_tunnel_register+0xb15/0xdd0 net/l2tp/l2tp_core.c:1523
l2tp_nl_cmd_tunnel_create+0x4b2/0xa60 net/l2tp/l2tp_netlink.c:249
genl_family_rcv_msg_doit net/netlink/genetlink.c:673 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:718 [inline]
genl_rcv_msg+0x627/0xdf0 net/netlink/genetlink.c:735
netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469
genl_rcv+0x24/0x40 net/netlink/genetlink.c:746
netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:672
____sys_sendmsg+0x6e6/0x810 net/socket.c:2352
___sys_sendmsg+0x100/0x170 net/socket.c:2406
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2439
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca29
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007effe76edc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004fe1c0 RCX: 000000000045ca29
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000005
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000094e R14: 00000000004d5d00 R15: 00007effe76ee6d4
Allocated by task 3018:
save_stack+0x1b/0x40 mm/kasan/common.c:49
set_track mm/kasan/common.c:57 [inline]
__kasan_kmalloc mm/kasan/common.c:495 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468
__do_kmalloc mm/slab.c:3656 [inline]
__kmalloc+0x161/0x7a0 mm/slab.c:3665
kmalloc include/linux/slab.h:560 [inline]
sk_prot_alloc+0x223/0x2f0 net/core/sock.c:1612
sk_alloc+0x36/0x1100 net/core/sock.c:1666
data_sock_create drivers/isdn/mISDN/socket.c:600 [inline]
mISDN_sock_create+0x272/0x400 drivers/isdn/mISDN/socket.c:796
__sock_create+0x3cb/0x730 net/socket.c:1428
sock_create net/socket.c:1479 [inline]
__sys_socket+0xef/0x200 net/socket.c:1521
__do_sys_socket net/socket.c:1530 [inline]
__se_sys_socket net/socket.c:1528 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1528
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xb3
Freed by task 2484:
save_stack+0x1b/0x40 mm/kasan/common.c:49
set_track mm/kasan/common.c:57 [inline]
kasan_set_free_info mm/kasan/common.c:317 [inline]
__kasan_slab_free+0xf7/0x140 mm/kasan/common.c:456
__cache_free mm/slab.c:3426 [inline]
kfree+0x109/0x2b0 mm/slab.c:3757
kvfree+0x42/0x50 mm/util.c:603
__free_fdtable+0x2d/0x70 fs/file.c:31
put_files_struct fs/file.c:420 [inline]
put_files_struct+0x248/0x2e0 fs/file.c:413
exit_files+0x7e/0xa0 fs/file.c:445
do_exit+0xb04/0x2dd0 kernel/exit.c:791
do_group_exit+0x125/0x340 kernel/exit.c:894
get_signal+0x47b/0x24e0 kernel/signal.c:2739
do_signal+0x81/0x2240 arch/x86/kernel/signal.c:784
exit_to_usermode_loop+0x26c/0x360 arch/x86/entry/common.c:161
prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305
entry_SYSCALL_64_after_hwframe+0x49/0xb3
The buggy address belongs to the object at ffff88808ed0c000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1424 bytes inside of
2048-byte region [ffff88808ed0c000, ffff88808ed0c800)
The buggy address belongs to the page:
page:ffffea00023b4300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002838208 ffffea00015ba288 ffff8880aa000e00
raw: 0000000000000000 ffff88808ed0c000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88808ed0c480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88808ed0c500: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808ed0c580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88808ed0c600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88808ed0c680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Fixes: 6b9f34239b ("l2tp: fix races in tunnel creation")
Fixes: fd558d186d ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Chapman <jchapman@katalix.com>
Cc: Guillaume Nault <gnault@redhat.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A null pointer dereference in qrtr_ns_data_ready() is seen if a client
opens a qrtr socket before qrtr_ns_init() can bind to the control port.
When the control port is bound, the ENETRESET error will be broadcasted
and clients will close their sockets. This results in DEL_CLIENT
packets being sent to the ns and qrtr_ns_data_ready() being called
without the workqueue being allocated.
Allocate the workqueue before setting sk_data_ready and binding to the
control port. This ensures that the work and workqueue structs are
allocated and initialized before qrtr_ns_data_ready can be called.
Fixes: 0c2204a4ad ("net: qrtr: Migrate nameservice to kernel from userspace")
Signed-off-by: Chris Lew <clew@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Paolo Abeni says:
====================
mptcp: a bunch of fixes
This patch series pulls together a few bugfixes for MPTCP bug observed while
doing stress-test with apache bench - forced to use MPTCP and multiple
subflows.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently we remote the msk from the token container only
via mptcp_close(). The MPTCP master socket can be destroyed
also via other paths (e.g. if not yet accepted, when shutting
down the listener socket). When we hit the latter scenario,
dangling msk references are left into the token container,
leading to memory corruption and/or UaF.
This change addresses the issue by moving the token removal
into the msk destructor.
Fixes: 79c0949e9a ("mptcp: Add key generation and token tree")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If a MP_JOIN subflow completes the 3whs while another
CPU is closing the master msk, we can hit the
following race:
CPU1 CPU2
close()
mptcp_close
subflow_syn_recv_sock
mptcp_token_get_sock
mptcp_finish_join
inet_sk_state_load
mptcp_token_destroy
inet_sk_state_store(TCP_CLOSE)
__mptcp_flush_join_list()
mptcp_sock_graft
list_add_tail
sk_common_release
sock_orphan()
<socket free>
The MP_JOIN socket will be leaked. Additionally we can hit
UaF for the msk 'struct socket' referenced via the 'conn'
field.
This change try to address the issue introducing some
synchronization between the MP_JOIN 3whs and mptcp_close
via the join_list spinlock. If we detect the msk is closing
the MP_JOIN socket is closed, too.
Fixes: f296234c98 ("mptcp: Add handling of incoming MP_JOIN requests")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently unblocking connect() on MPTCP sockets fails frequently.
If mptcp_stream_connect() is invoked to complete a previously
attempted unblocking connection, it will still try to create
the first subflow via __mptcp_socket_create(). If the 3whs is
completed and the 'can_ack' flag is already set, the latter
will fail with -EINVAL.
This change addresses the issue checking for pending connect and
delegating the completion to the first subflow. Additionally
do msk addresses and sk_state changes only when needed.
Fixes: 2303f994b3 ("mptcp: Associate MPTCP context with TCP socket")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently add nat mangle action with comparing invert and orig tuple.
It is better to check IPS_NAT_MASK flags first to avoid non necessary
memcmp for non-NAT conntrack.
Signed-off-by: wenxu <wenxu@ucloud.cn>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When devinet_sysctl_register() failed, the memory allocated
in neigh_parms_alloc() should be freed.
Fixes: 20e61da7ff ("ipv4: fail early when creating netdev named all or default")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When client on the host tries to connect(SOCK_STREAM, O_NONBLOCK) to the
server on the guest, there will be a panic on a ThunderX2 (armv8a server):
[ 463.718844] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[ 463.718848] Mem abort info:
[ 463.718849] ESR = 0x96000044
[ 463.718852] EC = 0x25: DABT (current EL), IL = 32 bits
[ 463.718853] SET = 0, FnV = 0
[ 463.718854] EA = 0, S1PTW = 0
[ 463.718855] Data abort info:
[ 463.718856] ISV = 0, ISS = 0x00000044
[ 463.718857] CM = 0, WnR = 1
[ 463.718859] user pgtable: 4k pages, 48-bit VAs, pgdp=0000008f6f6e9000
[ 463.718861] [0000000000000000] pgd=0000000000000000
[ 463.718866] Internal error: Oops: 96000044 [#1] SMP
[...]
[ 463.718977] CPU: 213 PID: 5040 Comm: vhost-5032 Tainted: G O 5.7.0-rc7+ #139
[ 463.718980] Hardware name: GIGABYTE R281-T91-00/MT91-FS1-00, BIOS F06 09/25/2018
[ 463.718982] pstate: 60400009 (nZCv daif +PAN -UAO)
[ 463.718995] pc : virtio_transport_recv_pkt+0x4c8/0xd40 [vmw_vsock_virtio_transport_common]
[ 463.718999] lr : virtio_transport_recv_pkt+0x1fc/0xd40 [vmw_vsock_virtio_transport_common]
[ 463.719000] sp : ffff80002dbe3c40
[...]
[ 463.719025] Call trace:
[ 463.719030] virtio_transport_recv_pkt+0x4c8/0xd40 [vmw_vsock_virtio_transport_common]
[ 463.719034] vhost_vsock_handle_tx_kick+0x360/0x408 [vhost_vsock]
[ 463.719041] vhost_worker+0x100/0x1a0 [vhost]
[ 463.719048] kthread+0x128/0x130
[ 463.719052] ret_from_fork+0x10/0x18
The race condition is as follows:
Task1 Task2
===== =====
__sock_release virtio_transport_recv_pkt
__vsock_release vsock_find_bound_socket (found sk)
lock_sock_nested
vsock_remove_sock
sock_orphan
sk_set_socket(sk, NULL)
sk->sk_shutdown = SHUTDOWN_MASK
...
release_sock
lock_sock
virtio_transport_recv_connecting
sk->sk_socket->state (panic!)
The root cause is that vsock_find_bound_socket can't hold the lock_sock,
so there is a small race window between vsock_find_bound_socket() and
lock_sock(). If __vsock_release() is running in another task,
sk->sk_socket will be set to NULL inadvertently.
This fixes it by checking sk->sk_shutdown(suggested by Stefano) after
lock_sock since sk->sk_shutdown is set to SHUTDOWN_MASK under the
protection of lock_sock_nested.
Signed-off-by: Jia He <justin.he@arm.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A fix for the recent change to how we restore non-volatile GPRs, which broke our
emulation of reading from the DSCR (Data Stream Control Register).
And a fix for the recent rewrite of interrupt/syscall exit in C, we need to
exclude KCOV from that code, otherwise it can lead to unrecoverable faults.
Thanks to:
Daniel Axtens.
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Merge tag 'powerpc-5.7-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- a fix for the recent change to how we restore non-volatile GPRs,
which broke our emulation of reading from the DSCR (Data Stream
Control Register).
- a fix for the recent rewrite of interrupt/syscall exit in C, we need
to exclude KCOV from that code, otherwise it can lead to
unrecoverable faults.
Thanks to Daniel Axtens.
* tag 'powerpc-5.7-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s: Disable sanitisers for C syscall/interrupt entry/exit code
powerpc/64s: Fix restore of NV GPRs after facility unavailable exception
- Fix proving of mvebu chips without PWM
- Fix errorpath on ida_get_simple() on the exar driver
- Notify userspace properly about line status changes
when flags are changed on lines.
- Fix a sleeping while holding spinlock in the mellanox
driver.
- Fix return value of the PXA and Kona probe calls.
- Fix IRQ locking of open drain lines, it is fine to
have IRQs on open drain lines flagged for output.
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Merge tag 'gpio-v5.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"Here are some (very) late fixes for GPIO, none of them very serious
except the one tagged for stable for enabling IRQ on open drain lines:
- Fix probing of mvebu chips without PWM
- Fix error path on ida_get_simple() on the exar driver
- Notify userspace properly about line status changes when flags are
changed on lines.
- Fix a sleeping while holding spinlock in the mellanox driver.
- Fix return value of the PXA and Kona probe calls.
- Fix IRQ locking of open drain lines, it is fine to have IRQs on
open drain lines flagged for output"
* tag 'gpio-v5.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: fix locking open drain IRQ lines
gpio: bcm-kona: Fix return value of bcm_kona_gpio_probe()
gpio: pxa: Fix return value of pxa_gpio_probe()
gpio: mlxbf2: Fix sleeping while holding spinlock
gpiolib: notify user-space about line status changes after flags are set
gpio: exar: Fix bad handling for ida_simple_get error path
gpio: mvebu: Fix probing for chips without PWM
Add details on using pstore/blk, the new backend of pstore to record
dumps to block devices, in Documentation/admin-guide/pstore-blk.rst
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-7-keescook@chromium.org/
Signed-off-by: Kees Cook <keescook@chromium.org>
Support backend for console. To enable console backend, just make
console_size be greater than 0 and a multiple of 4096.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-5-keescook@chromium.org/
Signed-off-by: Kees Cook <keescook@chromium.org>
