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At Linux Plumbers, Andy Lutomirski approached me and pointed out that the
function call syscall_get_arguments() implemented in x86 was horribly
written and not optimized for the standard case of passing in 0 and 6 for
the starting index and the number of system calls to get. When looking at
all the users of this function, I discovered that all instances pass in only
0 and 6 for these arguments. Instead of having this function handle
different cases that are never used, simply rewrite it to return the first 6
arguments of a system call.
This should help out the performance of tracing system calls by ptrace,
ftrace and perf.
Link: http://lkml.kernel.org/r/20161107213233.754809394@goodmis.org
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Dave Martin <dave.martin@arm.com>
Cc: "Dmitry V. Levin" <ldv@altlinux.org>
Cc: x86@kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-arch@vger.kernel.org
Acked-by: Paul Burton <paul.burton@mips.com> # MIPS parts
Acked-by: Max Filippov <jcmvbkbc@gmail.com> # For xtensa changes
Acked-by: Will Deacon <will.deacon@arm.com> # For the arm64 bits
Reviewed-by: Thomas Gleixner <tglx@linutronix.de> # for x86
Reviewed-by: Dmitry V. Levin <ldv@altlinux.org>
Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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C-SKY syscall arguments are located in orig_a0,a1,a2,a3,regs[0],regs[1]
fields of struct pt_regs.
Due to an off-by-one bug and a bug in pointer arithmetic
syscall_get_arguments() was reading orig_a0,regs[1..5] fields instead.
Likewise, syscall_set_arguments() was writing orig_a0,regs[1..5] fields
instead.
Link: http://lkml.kernel.org/r/20190329171230.GB32456@altlinux.org
Fixes: 4859bfca11c7d ("csky: System Call")
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Cc: stable@vger.kernel.org # v4.20+
Tested-by: Guo Ren <ren_guo@c-sky.com>
Acked-by: Guo Ren <ren_guo@c-sky.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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RISC-V syscall arguments are located in orig_a0,a1..a5 fields
of struct pt_regs.
Due to an off-by-one bug and a bug in pointer arithmetic
syscall_get_arguments() was reading s3..s7 fields instead of a1..a5.
Likewise, syscall_set_arguments() was writing s3..s7 fields
instead of a1..a5.
Link: http://lkml.kernel.org/r/20190329171221.GA32456@altlinux.org
Fixes: e2c0cdfba7f69 ("RISC-V: User-facing API")
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-riscv@lists.infradead.org
Cc: stable@vger.kernel.org # v4.15+
Acked-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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The only users that calls syscall_get_arguments() with a variable and not a
hard coded '6' is ftrace_syscall_enter(). syscall_get_arguments() can be
optimized by removing a variable input, and always grabbing 6 arguments
regardless of what the system call actually uses.
Change ftrace_syscall_enter() to pass the 6 args into a local stack array
and copy the necessary arguments into the trace event as needed.
This is needed to remove two parameters from syscall_get_arguments().
Link: http://lkml.kernel.org/r/20161107213233.627583542@goodmis.org
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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task_current_syscall() has a single user that passes in 6 for maxargs, which
is the maximum arguments that can be used to get system calls from
syscall_get_arguments(). Instead of passing in a number of arguments to
grab, just get 6 arguments. The args argument even specifies that it's an
array of 6 items.
This will also allow changing syscall_get_arguments() to not get a variable
number of arguments, but always grab 6.
Linus also suggested not passing in a bunch of arguments to
task_current_syscall() but to instead pass in a pointer to a structure, and
just fill the structure. struct seccomp_data has almost all the parameters
that is needed except for the stack pointer (sp). As seccomp_data is part of
uapi, and I'm afraid to change it, a new structure was created
"syscall_info", which includes seccomp_data and adds the "sp" field.
Link: http://lkml.kernel.org/r/20161107213233.466776454@goodmis.org
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Pull KVM fixes from Paolo Bonzini:
"A collection of x86 and ARM bugfixes, and some improvements to
documentation.
On top of this, a cleanup of kvm_para.h headers, which were exported
by some architectures even though they not support KVM at all. This is
responsible for all the Kbuild changes in the diffstat"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (28 commits)
Documentation: kvm: clarify KVM_SET_USER_MEMORY_REGION
KVM: doc: Document the life cycle of a VM and its resources
KVM: selftests: complete IO before migrating guest state
KVM: selftests: disable stack protector for all KVM tests
KVM: selftests: explicitly disable PIE for tests
KVM: selftests: assert on exit reason in CR4/cpuid sync test
KVM: x86: update %rip after emulating IO
x86/kvm/hyper-v: avoid spurious pending stimer on vCPU init
kvm/x86: Move MSR_IA32_ARCH_CAPABILITIES to array emulated_msrs
KVM: x86: Emulate MSR_IA32_ARCH_CAPABILITIES on AMD hosts
kvm: don't redefine flags as something else
kvm: mmu: Used range based flushing in slot_handle_level_range
KVM: export <linux/kvm_para.h> and <asm/kvm_para.h> iif KVM is supported
KVM: x86: remove check on nr_mmu_pages in kvm_arch_commit_memory_region()
kvm: nVMX: Add a vmentry check for HOST_SYSENTER_ESP and HOST_SYSENTER_EIP fields
KVM: SVM: Workaround errata#1096 (insn_len maybe zero on SMAP violation)
KVM: Reject device ioctls from processes other than the VM's creator
KVM: doc: Fix incorrect word ordering regarding supported use of APIs
KVM: x86: fix handling of role.cr4_pae and rename it to 'gpte_size'
KVM: nVMX: Do not inherit quadrant and invalid for the root shadow EPT
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A pile of x86 updates:
- Prevent exceeding he valid physical address space in the /dev/mem
limit checks.
- Move all header content inside the header guard to prevent compile
failures.
- Fix the bogus __percpu annotation in this_cpu_has() which makes
sparse very noisy.
- Disable switch jump tables completely when retpolines are enabled.
- Prevent leaking the trampoline address"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/realmode: Make set_real_mode_mem() static inline
x86/cpufeature: Fix __percpu annotation in this_cpu_has()
x86/mm: Don't exceed the valid physical address space
x86/retpolines: Disable switch jump tables when retpolines are enabled
x86/realmode: Don't leak the trampoline kernel address
x86/boot: Fix incorrect ifdeffery scope
x86/resctrl: Remove unused variable
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf tooling fixes from Thomas Gleixner:
"Core libraries:
- Fix max perf_event_attr.precise_ip detection.
- Fix parser error for uncore event alias
- Fixup ordering of kernel maps after obtaining the main kernel map
address.
Intel PT:
- Fix TSC slip where A TSC packet can slip past MTC packets so that
the timestamp appears to go backwards.
- Fixes for exported-sql-viewer GUI conversion to python3.
ARM coresight:
- Fix the build by adding a missing case value for enumeration value
introduced in newer library, that now is the required one.
tool headers:
- Syncronize kernel headers with the kernel, getting new io_uring and
pidfd_send_signal syscalls so that 'perf trace' can handle them"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf pmu: Fix parser error for uncore event alias
perf scripts python: exported-sql-viewer.py: Fix python3 support
perf scripts python: exported-sql-viewer.py: Fix never-ending loop
perf machine: Update kernel map address and re-order properly
tools headers uapi: Sync powerpc's asm/kvm.h copy with the kernel sources
tools headers: Update x86's syscall_64.tbl and uapi/asm-generic/unistd
tools headers uapi: Update drm/i915_drm.h
tools arch x86: Sync asm/cpufeatures.h with the kernel sources
tools headers uapi: Sync linux/fcntl.h to get the F_SEAL_FUTURE_WRITE addition
tools headers uapi: Sync asm-generic/mman-common.h and linux/mman.h
perf evsel: Fix max perf_event_attr.precise_ip detection
perf intel-pt: Fix TSC slip
perf cs-etm: Add missing case value
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull CPU hotplug fixes from Thomas Gleixner:
"Two SMT/hotplug related fixes:
- Prevent crash when HOTPLUG_CPU is disabled and the CPU bringup
aborts. This is triggered with the 'nosmt' command line option, but
can happen by any abort condition. As the real unplug code is not
compiled in, prevent the fail by keeping the CPU in zombie state.
- Enforce HOTPLUG_CPU for SMP on x86 to avoid the above situation
completely. With 'nosmt' being a popular option it's required to
unplug the half brought up sibling CPUs (due to the MCE wreckage)
completely"
* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/smp: Enforce CONFIG_HOTPLUG_CPU when SMP=y
cpu/hotplug: Prevent crash when CPU bringup fails on CONFIG_HOTPLUG_CPU=n
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixlet from Thomas Gleixner:
"Trivial update to the maintainers file"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
MAINTAINERS: Remove deleted file from futex file pattern
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core fixes from Thomas Gleixner:
"A small set of core updates:
- Make the watchdog respect the selected CPU mask again. That was
broken by the rework of the watchdog thread management and caused
inconsistent state and NMI watchdog being unstoppable.
- Ensure that the objtool build can find the libelf location.
- Remove dead kcore stub code"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
watchdog: Respect watchdog cpumask on CPU hotplug
objtool: Query pkg-config for libelf location
proc/kcore: Remove unused kclist_add_remap()
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Three non-regression fixes.
- Our optimised memcmp could read past the end of one of the buffers
and potentially trigger a page fault leading to an oops.
- Some of our code to read energy management data on PowerVM had an
endian bug leading to bogus results.
- When reporting a machine check exception we incorrectly reported
TLB multihits as D-Cache multhits due to a missing entry in the
array of causes.
Thanks to: Chandan Rajendra, Gautham R. Shenoy, Mahesh Salgaonkar,
Segher Boessenkool, Vaidyanathan Srinivasan"
* tag 'powerpc-5.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/pseries/mce: Fix misleading print for TLB mutlihit
powerpc/pseries/energy: Use OF accessor functions to read ibm,drc-indexes
powerpc/64: Fix memcmp reading past the end of src/dest
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git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul:
- Revert "dmaengine: stm32-mdma: Add a check on read_u32_array" as that
caused regression
- Fix MAINTAINER file uniphier-mdmac.c file path
* tag 'dmaengine-fix-5.1-rc3' of git://git.infradead.org/users/vkoul/slave-dma:
MAINTAINERS: Fix uniphier-mdmac.c file path
dmaengine: stm32-mdma: Revert "dmaengine: stm32-mdma: Add a check on read_u32_array"
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git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
Pull LED fixes from Jacek Anaszewski:
- fix refcnt leak on interface rename
- use memcpy in device_name_store() to avoid including garbage from a
previous, longer value in the device_name
- fix a potential NULL pointer dereference in case of_match_device()
cannot find a match
* tag 'led-fixes-for-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
leds: trigger: netdev: use memcpy in device_name_store
leds: pca9532: fix a potential NULL pointer dereference
leds: trigger: netdev: fix refcnt leak on interface rename
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"As you can see [in the git history] I was away on leave and Bartosz
kindly stepped in and collected a slew of fixes, I pulled them into my
tree in two sets and merged some two more fixes (fixing my own caused
bugs) on top.
Summary:
- Revert the extended use of gpio_set_config() and think about how we
can do this properly.
- Fix up the SPI CS GPIO handling so it now works properly on the SPI
bus children, as intended.
- Error paths and driver fixes"
* tag 'gpio-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: mockup: use simple_read_from_buffer() in debugfs read callback
gpio: of: Fix of_gpiochip_add() error path
gpio: of: Check for "spi-cs-high" in child instead of parent node
gpio: of: Check propname before applying "cs-gpios" quirks
gpio: mockup: fix debugfs read
Revert "gpio: use new gpio_set_config() helper in more places"
gpio: aspeed: fix a potential NULL pointer dereference
gpio: amd-fch: Fix bogus SPDX identifier
gpio: adnp: Fix testing wrong value in adnp_gpio_direction_input
gpio: exar: add a check for the return value of ida_simple_get fails
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If userspace doesn't end the input with a newline (which can easily
happen if the write happens from a C program that does write(fd,
iface, strlen(iface))), we may end up including garbage from a
previous, longer value in the device_name. For example
# cat device_name
# printf 'eth12' > device_name
# cat device_name
eth12
# printf 'eth3' > device_name
# cat device_name
eth32
I highly doubt anybody is relying on this behaviour, so switch to
simply copying the bytes (we've already checked that size is <
IFNAMSIZ) and unconditionally zero-terminate it; of course, we also
still have to strip a trailing newline.
This is also preparation for future patches.
Fixes: 06f502f57d0d ("leds: trigger: Introduce a NETDEV trigger")
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
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In case of_match_device cannot find a match, return -EINVAL to avoid
NULL pointer dereference.
Fixes: fa4191a609f2 ("leds: pca9532: Add device tree support")
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are some small staging driver fixes for 5.1-rc3, and one driver
removal.
The biggest thing here is the removal of the mt7621-eth driver as a
"real" network driver was merged in 5.1-rc1 for this hardware, so this
old driver can now be removed.
Other than that, there are just a number of small fixes, all resolving
reported issues and some potential corner cases for error handling
paths.
All of these have been in linux-next with no reported issues"
* tag 'staging-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: vt6655: Remove vif check from vnt_interrupt
staging: erofs: keep corrupted fs from crashing kernel in erofs_readdir()
staging: octeon-ethernet: fix incorrect PHY mode
staging: vc04_services: Fix an error code in vchiq_probe()
staging: erofs: fix error handling when failed to read compresssed data
staging: vt6655: Fix interrupt race condition on device start up.
staging: rtlwifi: Fix potential NULL pointer dereference of kzalloc
staging: rtl8712: uninitialized memory in read_bbreg_hdl()
staging: rtlwifi: rtl8822b: fix to avoid potential NULL pointer dereference
staging: rtl8188eu: Fix potential NULL pointer dereference of kcalloc
staging, mt7621-pci: fix build without pci support
staging: speakup_soft: Fix alternate speech with other synths
staging: axis-fifo: add CONFIG_OF dependency
staging: olpc_dcon_xo_1: add missing 'const' qualifier
staging: comedi: ni_mio_common: Fix divide-by-zero for DIO cmdtest
staging: erofs: fix to handle error path of erofs_vmap()
staging: mt7621-dts: update ethernet settings.
staging: remove mt7621-eth
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some small tty and serial driver fixes for 5.1-rc3.
Nothing major here, just a number of potential problems fixes for
error handling paths, as well as some other minor bugfixes for
reported issues with 5.1-rc1.
All of these have been in linux-next with no reported issues"
* tag 'tty-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: fix NULL pointer issue when tty_port ops is not set
Disable kgdboc failed by echo space to /sys/module/kgdboc/parameters/kgdboc
dt-bindings: serial: Add compatible for Mediatek MT8183
tty/serial: atmel: RS485 HD w/DMA: enable RX after TX is stopped
tty/serial: atmel: Add is_half_duplex helper
serial: sh-sci: Fix setting SCSCR_TIE while transferring data
serial: ar933x_uart: Fix build failure with disabled console
tty: serial: qcom_geni_serial: Initialize baud in qcom_geni_console_setup
sc16is7xx: missing unregister/delete driver on error in sc16is7xx_init()
tty: mxs-auart: fix a potential NULL pointer dereference
tty: atmel_serial: fix a potential NULL pointer dereference
serial: max310x: Fix to avoid potential NULL pointer dereference
serial: mvebu-uart: Fix to avoid a potential NULL pointer dereference
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB fixes for 5.1-rc3.
Nothing major at all here, just a small collection of fixes for
reported issues, and potential problems with error handling paths.
Also a few new device ids, as normal.
All of these have been in linux-next with no reported issues"
* tag 'usb-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (25 commits)
USB: serial: option: add Olicard 600
USB: serial: cp210x: add new device id
usb: u132-hcd: fix resource leak
usb: cdc-acm: fix race during wakeup blocking TX traffic
usb: mtu3: fix EXTCON dependency
usb: usb251xb: fix to avoid potential NULL pointer dereference
usb: core: Try generic PHY_MODE_USB_HOST if usb_phy_roothub_set_mode fails
phy: sun4i-usb: Support set_mode to USB_HOST for non-OTG PHYs
xhci: Don't let USB3 ports stuck in polling state prevent suspend
usb: xhci: dbc: Don't free all memory with spinlock held
xhci: Fix port resume done detection for SS ports with LPM enabled
USB: serial: mos7720: fix mos_parport refcount imbalance on error path
USB: gadget: f_hid: fix deadlock in f_hidg_write()
usb: gadget: net2272: Fix net2272_dequeue()
usb: gadget: net2280: Fix net2280_dequeue()
usb: gadget: net2280: Fix overrun of OUT messages
usb: dwc3: pci: add support for Comet Lake PCH ID
usb: usb251xb: Remove unnecessary comparison of unsigned integer with >= 0
usb: common: Consider only available nodes for dr_mode
usb: typec: tcpm: Try PD-2.0 if sink does not respond to 3.0 source-caps
...
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"This corrects a previous attempt to make Linux use its own set of ACPI
debug flags different from the upstream ACPICA's default (Erik
Schmauss)"
* tag 'acpi-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: use different default debug value than ACPICA
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix CPU base frequency reporting in the intel_pstate driver and
a use-after-free in the scpi-cpufreq driver.
Specifics:
- Fix the ACPI CPPC library to actually follow the specification when
decoding the guaranteed performance register information and make
the intel_pstate driver to fall back to the nominal frequency when
reporting the base frequency if the guaranteed performance register
information is not there (Srinivas Pandruvada).
- Fix use-after-free in the exit callback of the scpi-cpufreq left
after an update during the 5.0 development cycle (Vincent Stehlé)"
* tag 'pm-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: scpi: Fix use after free
cpufreq: intel_pstate: Also use CPPC nominal_perf for base_frequency
ACPI / CPPC: Fix guaranteed performance handling
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git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security layer fixes from James Morris:
"Yama and LSM config fixes"
* 'fixes-v5.1-a' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
LSM: Revive CONFIG_DEFAULT_SECURITY_* for "make oldconfig"
Yama: mark local symbols as static
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Merge misc fixes from Andrew Morton:
"22 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (22 commits)
fs/proc/proc_sysctl.c: fix NULL pointer dereference in put_links
fs: fs_parser: fix printk format warning
checkpatch: add %pt as a valid vsprintf extension
mm/migrate.c: add missing flush_dcache_page for non-mapped page migrate
drivers/block/zram/zram_drv.c: fix idle/writeback string compare
mm/page_isolation.c: fix a wrong flag in set_migratetype_isolate()
mm/memory_hotplug.c: fix notification in offline error path
ptrace: take into account saved_sigmask in PTRACE{GET,SET}SIGMASK
fs/proc/kcore.c: make kcore_modules static
include/linux/list.h: fix list_is_first() kernel-doc
mm/debug.c: fix __dump_page when mapping->host is not set
mm: mempolicy: make mbind() return -EIO when MPOL_MF_STRICT is specified
include/linux/hugetlb.h: convert to use vm_fault_t
iommu/io-pgtable-arm-v7s: request DMA32 memory, and improve debugging
mm: add support for kmem caches in DMA32 zone
ocfs2: fix inode bh swapping mixup in ocfs2_reflink_inodes_lock
mm/hotplug: fix offline undo_isolate_page_range()
fs/open.c: allow opening only regular files during execve()
mailmap: add Changbin Du
mm/debug.c: add a cast to u64 for atomic64_read()
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fix from Catalin Marinas:
"Use memblock_alloc() instead of memblock_alloc_low() in
request_standard_resources(), the latter being limited to the low 4G
memory range on arm64"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: replace memblock_alloc_low with memblock_alloc
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
- Fix a bug in the AMD IOMMU driver not handling exclusion ranges
correctly. In fact the driver did not reserve these ranges for IOVA
allocations, so that dma-handles could be allocated in an exclusion
range, leading to data corruption. Exclusion ranges have not been
used by any firmware up to now, so this issue remained undiscovered
for quite some time.
- Fix wrong warning messages that the IOMMU core code prints when it
tries to allocate the default domain for an iommu group and the
driver does not support any of the default domain types (like Intel
VT-d).
* tag 'iommu-fixes-v5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Reserve exclusion range in iova-domain
iommu: Don't print warning when IOMMU driver only supports unmanaged domains
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fix from Greg KH:
"Here is a single driver core patch for 5.1-rc3.
After 5.1-rc1, all of the users of BUS_ATTR() are finally removed, so
we can now drop this macro from include/linux/device.h so that no more
new users will be created.
This patch has been in linux-next for a while, with no reported
issues"
* tag 'driver-core-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
driver core: remove BUS_ATTR()
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some binder, habanalabs, and vboxguest driver fixes for
5.1-rc3.
The Binder fixes resolve some reported issues found by testing, first
by the selinux developers, and then earlier today by syzbot.
The habanalabs fixes are all minor, resolving a number of tiny things.
The vboxguest patches are a bit larger. They resolve the fact that
virtual box decided to change their api in their latest release in a
way that broke the existing kernel code, despite saying that they were
never going to do that. So this is a bit of a "new feature", but is
good to get merged so that 5.1 will work with the latest release. The
changes are not large and of course virtual box "swears" they will not
break this again, but no one is holding their breath here.
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
virt: vbox: Implement passing requestor info to the host for VirtualBox 6.0.x
binder: fix race between munmap() and direct reclaim
binder: fix BUG_ON found by selinux-testsuite
habanalabs: cast to expected type
habanalabs: prevent host crash during suspend/resume
habanalabs: perform accounting for active CS
habanalabs: fix mapping with page size bigger than 4KB
habanalabs: complete user context cleanup before hard reset
habanalabs: fix bug when mapping very large memory area
habanalabs: fix MMU number of pages calculation
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Thirteen fixes, seven of which are for IBM fibre channel and three
additional for fairly serious bugs in drivers (qla2xxx, mpt3sas,
aacraid).
Of the three core fixes, the most significant is probably the missed
run queue causing an indefinite hang. The others are fixing a
potential use after free on device close and silencing an incorrect
warning"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: ibmvfc: Clean up transport events
scsi: ibmvfc: Byte swap status and error codes when logging
scsi: ibmvfc: Add failed PRLI to cmd_status lookup array
scsi: ibmvfc: Remove "failed" from logged errors
scsi: zfcp: reduce flood of fcrscn1 trace records on multi-element RSCN
scsi: zfcp: fix scsi_eh host reset with port_forced ERP for non-NPIV FCP devices
scsi: zfcp: fix rport unblock if deleted SCSI devices on Scsi_Host
scsi: sd: Quiesce warning if device does not report optimal I/O size
scsi: sd: Fix a race between closing an sd device and sd I/O
scsi: core: Run queue when state is set to running after being blocked
scsi: qla4xxx: fix a potential NULL pointer dereference
scsi: aacraid: Insure we don't access PCIe space during AER/EEH
scsi: mpt3sas: Fix kernel panic during expander reset
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"A new ID for the i801 driver and some Documentation fixes to make it
easier for people to find the bindings (which is also a basis for
further improvements in that area)"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: wmt: make bindings file name match the driver
i2c: sun6i-p2wi: make bindings file name match the driver
i2c: stu300: make bindings file name match the driver
i2c: mt65xx: make bindings file name match the driver
i2c: iop3xx: make bindings file name match the driver
i2c: i801: Add support for Intel Comet Lake
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"The important fixes at this time are a couple fixes in ALSA core: a
fix for PCM is about the OOB access in PCM OSS plugins that has been
for long time, but hasn't hit so often until now just because we
allocated a large buffer via vmalloc(), and surfaced more often after
switching to kvmalloc(). Another fix is for a long-standing PCM
problem wrt racy PM resume.
Others are trivial nospec coverage and usual HD-audio quirks"
* tag 'sound-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek - Fix speakers on Acer Predator Helios 500 Ryzen laptops
ALSA: pcm: Don't suspend stream in unrecoverable PCM state
ALSA: hda/ca0132 - Simplify alt firmware loading code
ALSA: pcm: Fix possible OOB access in PCM oss plugins
ALSA: hda/realtek: Enable headset MIC of ASUS X430UN and X512DK with ALC256
ALSA: hda/realtek: Enable headset mic of ASUS P5440FF with ALC256
ALSA: hda/realtek: Enable ASUS X441MB and X705FD headset MIC with ALC256
ALSA: hda/realtek - Add support for Acer Aspire E5-523G/ES1-432 headset mic
ALSA: hda/realtek: Enable headset MIC of Acer Aspire Z24-890 with ALC286
ALSA: seq: oss: Fix Spectre v1 vulnerability
ALSA: rawmidi: Fix potential Spectre v1 vulnerability
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Remove harmful -Oz option of Clang
- Get back the original behavior (no recursion for in-tree build) for
GNU Make 4.x
- Some minor fixes for coccinelle patches
- Do not overwrite .gitignore in the output directory in case it is
version-controlled
- Fix missed record-mcount bug for dynamic ftrace
- Fix endianness bug in modversions for relative CRC
- Cater to '^H' key code in Kconfig ncurses programs
* tag 'kbuild-fixes-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig/[mn]conf: handle backspace (^H) key
kbuild: modversions: Fix relative CRC byte order interpretation
scripts: coccinelle: Fix description of badty.cocci
kbuild: strip whitespace in cmd_record_mcount findstring
kbuild: do not overwrite .gitignore in output directory
kbuild: skip parsing pre sub-make code for recursion
coccinelle: put_device: reduce false positives
kbuild: skip sub-make for in-tree build with GNU Make 4.x
Revert "kbuild: use -Oz instead of -Os when using clang"
|
|
Pull block fixes from Jens Axboe:
"Small set of fixes that should go into this series. This contains:
- compat signal mask fix for io_uring (Arnd)
- EAGAIN corner case for direct vs buffered writes for io_uring
(Roman)
- NVMe pull request from Christoph with various little fixes
- sbitmap ws_active fix, which caused a perf regression for shared
tags (me)
- sbitmap bit ordering fix (Ming)
- libata on-stack DMA fix (Raymond)"
* tag 'for-linus-20190329' of git://git.kernel.dk/linux-block:
nvmet: fix error flow during ns enable
nvmet: fix building bvec from sg list
nvme-multipath: relax ANA state check
nvme-tcp: fix an endianess miss-annotation
libata: fix using DMA buffers on stack
io_uring: offload write to async worker in case of -EAGAIN
sbitmap: order READ/WRITE freed instance and setting clear bit
blk-mq: fix sbitmap ws_active for shared tags
io_uring: fix big-endian compat signal mask handling
blk-mq: update comment for blk_mq_hctx_has_pending()
blk-mq: use blk_mq_put_driver_tag() to put tag
|
|
Pull ceph fixes from Ilya Dryomov:
"A patch to avoid choking on multipage bvecs in the messenger and a
small use-after-free fix"
* tag 'ceph-for-5.1-rc3' of git://github.com/ceph/ceph-client:
ceph: fix use-after-free on symlink traversal
libceph: fix breakage caused by multipage bvecs
|
|
Pull xfs fixes from Darrick Wong:
"Here are a few fixes for some corruption bugs and uninitialized
variable problems. The few patches here have gone through a few days
worth of fstest runs with no new problems observed.
Changes since last update:
- Fix a bunch of static checker complaints about uninitialized
variables and insufficient range checks.
- Avoid a crash when incore extent map data are corrupt.
- Disallow FITRIM when we haven't recovered the log and know the
metadata are stale.
- Fix a data corruption when doing unaligned overlapping dio writes"
* tag 'xfs-5.1-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: serialize unaligned dio writes against all other dio writes
xfs: prohibit fstrim in norecovery mode
xfs: always init bma in xfs_bmapi_write
xfs: fix btree scrub checking with regards to root-in-inode
xfs: dabtree scrub needs to range-check level
xfs: don't trip over uninitialized buffer on extent read of corrupted inode
|
|
Commit 70b62c25665f636c ("LoadPin: Initialize as ordered LSM") removed
CONFIG_DEFAULT_SECURITY_{SELINUX,SMACK,TOMOYO,APPARMOR,DAC} from
security/Kconfig and changed CONFIG_LSM to provide a fixed ordering as a
default value. That commit expected that existing users (upgrading from
Linux 5.0 and earlier) will edit CONFIG_LSM value in accordance with
their CONFIG_DEFAULT_SECURITY_* choice in their old kernel configs. But
since users might forget to edit CONFIG_LSM value, this patch revives
the choice (only for providing the default value for CONFIG_LSM) in order
to make sure that CONFIG_LSM reflects CONFIG_DEFAULT_SECURITY_* from their
old kernel configs.
Note that since TOMOYO can be fully stacked against the other legacy
major LSMs, when it is selected, it explicitly disables the other LSMs
to avoid them also initializing since TOMOYO does not expect this
currently.
Reported-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Fixes: 70b62c25665f636c ("LoadPin: Initialize as ordered LSM")
Co-developed-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo:
Core libraries:
Jiri Olsa:
- Fix max perf_event_attr.precise_ip detection.
Kan Liang:
- Fix parser error for uncore event alias
Wei Lin:
- Fixup ordering of kernel maps after obtaining the main kernel map address.
Intel PT:
Adrian Hunter:
- Fix TSC slip where A TSC packet can slip past MTC packets so that the
timestamp appears to go backwards.
- Fixes for exported-sql-viewer GUI conversion to python3.
ARM coresight:
Solomon Tan:
- Fix the build by adding a missing case value for enumeration value introduced
in newer library, that now is the required one.
tool headers:
Arnaldo Carvalho de Melo:
- Syncronize kernel headers with the kernel, getting new io_uring and
pidfd_send_signal syscalls so that 'perf trace' can handle them.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Pull drm fixes from Dave Airlie:
"Weekly fixes roundup, nothing two serious, some usb device regressions
are fixed, and i915 GVT has a bigger fix but otherwise not really much
happening here.
core:
- fb bpp check regression fix
- release/unplug fix
- use after free fixes
i915:
- fix mmap range checks
- fix gvt ppgtt mm LRU list access races
- fix selftest error pointer check
- fix a macro definition (pre-emptive for potential further backports)
- fix one AML SKU ULX status
amdgpu:
- one variable refresh rate fix
udl:
- fix EDID reading
tegra:
- build/warning fixes
meson:
- cleanup path fixes
- TMDS clock filter fix
rockchip:
- NV12 buffers and scalar fix"
* tag 'drm-fixes-2019-03-29' of git://anongit.freedesktop.org/drm/drm: (22 commits)
drm/i915/icl: Fix VEBOX mismatch BUG_ON()
drm/i915/selftests: Fix an IS_ERR() vs NULL check
drm/i915: Mark AML 0x87CA as ULX
drm/meson: fix TMDS clock filtering for DMT monitors
drm/meson: Uninstall IRQ handler
drm/meson: Fix invalid pointer in meson_drv_unbind()
drm/udl: Refactor edid retrieving in UDL driver (v2)
drm: Fix drm_release() and device unplug
drm/fb: avoid setting 0 depth.
drm/tegra: vic: Fix implicit function declaration warning
drm/tegra: hub: Fix dereference before check
drm/i915/icl: Fix the TRANS_DDI_FUNC_CTL2 bitfield macro
drm/amd/display: Only allow VRR when vrefresh is within supported range
drm/rockchip: vop: reset scale mode when win is disabled
drm/vkms: fix use-after-free when drm_gem_handle_create() fails
drm/vgem: fix use-after-free when drm_gem_handle_create() fails
drm/i915/gvt: Add mutual lock for ppgtt mm LRU list
drm/i915/gvt: Only assign ppgtt root at dispatch time
drm/i915/gvt: Don't submit request for error workload dispatch
drm/i915/gvt: stop scheduling workload when vgpu is inactive
...
|
|
Syzkaller reports:
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN PTI
CPU: 1 PID: 5373 Comm: syz-executor.0 Not tainted 5.0.0-rc8+ #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
RIP: 0010:put_links+0x101/0x440 fs/proc/proc_sysctl.c:1599
Code: 00 0f 85 3a 03 00 00 48 8b 43 38 48 89 44 24 20 48 83 c0 38 48 89 c2 48 89 44 24 28 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 fe 02 00 00 48 8b 74 24 20 48 c7 c7 60 2a 9d 91
RSP: 0018:ffff8881d828f238 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881e01b1140 RCX: ffffffff8ee98267
RDX: 0000000000000007 RSI: ffffc90001479000 RDI: ffff8881e01b1178
RBP: dffffc0000000000 R08: ffffed103ee27259 R09: ffffed103ee27259
R10: 0000000000000001 R11: ffffed103ee27258 R12: fffffffffffffff4
R13: 0000000000000006 R14: ffff8881f59838c0 R15: dffffc0000000000
FS: 00007f072254f700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff8b286668 CR3: 00000001f0542002 CR4: 00000000007606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
drop_sysctl_table+0x152/0x9f0 fs/proc/proc_sysctl.c:1629
get_subdir fs/proc/proc_sysctl.c:1022 [inline]
__register_sysctl_table+0xd65/0x1090 fs/proc/proc_sysctl.c:1335
br_netfilter_init+0xbc/0x1000 [br_netfilter]
do_one_initcall+0xfa/0x5ca init/main.c:887
do_init_module+0x204/0x5f6 kernel/module.c:3460
load_module+0x66b2/0x8570 kernel/module.c:3808
__do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902
do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x462e99
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f072254ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00007f072254ec70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f072254f6bc
R13: 00000000004bcefa R14: 00000000006f6fb0 R15: 0000000000000004
Modules linked in: br_netfilter(+) dvb_usb_dibusb_mc_common dib3000mc dibx000_common dvb_usb_dibusb_common dvb_usb_dw2102 dvb_usb classmate_laptop palmas_regulator cn videobuf2_v4l2 v4l2_common snd_soc_bd28623 mptbase snd_usb_usx2y snd_usbmidi_lib snd_rawmidi wmi libnvdimm lockd sunrpc grace rc_kworld_pc150u rc_core rtc_da9063 sha1_ssse3 i2c_cros_ec_tunnel adxl34x_spi adxl34x nfnetlink lib80211 i5500_temp dvb_as102 dvb_core videobuf2_common videodev media videobuf2_vmalloc videobuf2_memops udc_core lnbp22 leds_lp3952 hid_roccat_ryos s1d13xxxfb mtd vport_geneve openvswitch nf_conncount nf_nat_ipv6 nsh geneve udp_tunnel ip6_udp_tunnel snd_soc_mt6351 sis_agp phylink snd_soc_adau1761_spi snd_soc_adau1761 snd_soc_adau17x1 snd_soc_core snd_pcm_dmaengine ac97_bus snd_compress snd_soc_adau_utils snd_soc_sigmadsp_regmap snd_soc_sigmadsp raid_class hid_roccat_konepure hid_roccat_common hid_roccat c2port_duramar2150 core mdio_bcm_unimac iptable_security iptable_raw iptable_mangle
iptable_nat nf_nat_ipv4 nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bpfilter ip6_vti ip_vti ip_gre ipip sit tunnel4 ip_tunnel hsr veth netdevsim devlink vxcan batman_adv cfg80211 rfkill chnl_net caif nlmon dummy team bonding vcan bridge stp llc ip6_gre gre ip6_tunnel tunnel6 tun crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel joydev mousedev ide_pci_generic piix aesni_intel aes_x86_64 ide_core crypto_simd atkbd cryptd glue_helper serio_raw ata_generic pata_acpi i2c_piix4 floppy sch_fq_codel ip_tables x_tables ipv6 [last unloaded: lm73]
Dumping ftrace buffer:
(ftrace buffer empty)
---[ end trace 770020de38961fd0 ]---
A new dir entry can be created in get_subdir and its 'header->parent' is
set to NULL. Only after insert_header success, it will be set to 'dir',
otherwise 'header->parent' is set to NULL and drop_sysctl_table is called.
However in err handling path of get_subdir, drop_sysctl_table also be
called on 'new->header' regardless its value of parent pointer. Then
put_links is called, which triggers NULL-ptr deref when access member of
header->parent.
In fact we have multiple error paths which call drop_sysctl_table() there,
upon failure on insert_links() we also call drop_sysctl_table().And even
in the successful case on __register_sysctl_table() we still always call
drop_sysctl_table().This patch fix it.
Link: http://lkml.kernel.org/r/20190314085527.13244-1-yuehaibing@huawei.com
Fixes: 0e47c99d7fe25 ("sysctl: Replace root_list with links between sysctl_table_sets")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: <stable@vger.kernel.org> [3.4+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Fix printk format warning (seen on i386 builds) by using ptrdiff format
specifier (%t):
fs/fs_parser.c:413:6: warning: format `%lu' expects argument of type `long unsigned int', but argument 3 has type `int' [-Wformat=]
Link: http://lkml.kernel.org/r/19432668-ffd3-fbb2-af4f-1c8e48f6cc81@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Commit 4d42c44727a0 ("lib/vsprintf: Print time and date in human
readable format via %pt") introduced a new extension, %pt.
Add it in the list of valid extensions.
Link: http://lkml.kernel.org/r/20190314203719.29130-1-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Our MIPS 1004Kc SoCs were seeing random userspace crashes with SIGILL
and SIGSEGV that could not be traced back to a userspace code bug. They
had all the magic signs of an I/D cache coherency issue.
Now recently we noticed that the /proc/sys/vm/compact_memory interface
was quite efficient at provoking this class of userspace crashes.
Studying the code in mm/migrate.c there is a distinction made between
migrating a page that is mapped at the instant of migration and one that
is not mapped. Our problem turned out to be the non-mapped pages.
For the non-mapped page the code performs a copy of the page content and
all relevant meta-data of the page without doing the required D-cache
maintenance. This leaves dirty data in the D-cache of the CPU and on
the 1004K cores this data is not visible to the I-cache. A subsequent
page-fault that triggers a mapping of the page will happily serve the
process with potentially stale code.
What about ARM then, this bug should have seen greater exposure? Well
ARM became immune to this flaw back in 2010, see commit c01778001a4f
("ARM: 6379/1: Assume new page cache pages have dirty D-cache").
My proposed fix moves the D-cache maintenance inside move_to_new_page to
make it common for both cases.
Link: http://lkml.kernel.org/r/20190315083502.11849-1-larper@axis.com
Fixes: 97ee0524614 ("flush cache before installing new page at migraton")
Signed-off-by: Lars Persson <larper@axis.com>
Reviewed-by: Paul Burton <paul.burton@mips.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Makoto report a below KASAN error: zram does out-of-bounds read. Because
strscpy copies from source up to count bytes unconditionally. It could
cause out-of-bounds read on next object in slab.
To prevent it, use strlcpy which checks source's length automatically.
BUG: KASAN: slab-out-of-bounds in strscpy+0x68/0x154
Read of size 8 at addr ffffffc0c3495a00 by task system_server/1314
..
Call trace:
strscpy+0x68/0x154
idle_store+0xc4/0x34c
dev_attr_store+0x50/0x6c
sysfs_kf_write+0x98/0xb4
kernfs_fop_write+0x198/0x260
__vfs_write+0x10c/0x338
vfs_write+0x114/0x238
SyS_write+0xc8/0x168
__sys_trace_return+0x0/0x4
Allocated by task 1314:
__kmalloc+0x280/0x318
kernfs_fop_write+0xac/0x260
__vfs_write+0x10c/0x338
vfs_write+0x114/0x238
SyS_write+0xc8/0x168
__sys_trace_return+0x0/0x4
Freed by task 2855:
kfree+0x138/0x630
kernfs_put_open_node+0x10c/0x124
kernfs_fop_release+0xd8/0x114
__fput+0x130/0x2a4
____fput+0x1c/0x28
task_work_run+0x16c/0x1c8
do_notify_resume+0x2bc/0x107c
work_pending+0x8/0x10
The buggy address belongs to the object at ffffffc0c3495a00
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 0 bytes inside of
128-byte region [ffffffc0c3495a00, ffffffc0c3495a80)
The buggy address belongs to the page:
page:ffffffbf030d2500 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0
flags: 0x4000000000010200(slab|head)
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffffffc0c3495900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffc0c3495980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffffffc0c3495a00: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffffffc0c3495a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffffffc0c3495b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Link: http://lkml.kernel.org/r/20190319231911.145968-1-minchan@kernel.org
Cc: <stable@vger.kernel.org> [5.0]
Signed-off-by: Minchan Kim <minchan@kernel.org>
Reported-by: Makoto Wu <makotowu@google.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Due to has_unmovable_pages() taking an incorrect irqsave flag instead of
the isolation flag in set_migratetype_isolate(), there are issues with
HWPOSION and error reporting where dump_page() is not called when there
is an unmovable page.
Link: http://lkml.kernel.org/r/20190320204941.53731-1-cai@lca.pw
Fixes: d381c54760dc ("mm: only report isolation failures when offlining memory")
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Qian Cai <cai@lca.pw>
Cc: <stable@vger.kernel.org> [5.0.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When start_isolate_page_range() returned -EBUSY in __offline_pages(), it
calls memory_notify(MEM_CANCEL_OFFLINE, &arg) with an uninitialized
"arg". As the result, it triggers warnings below. Also, it is only
necessary to notify MEM_CANCEL_OFFLINE after MEM_GOING_OFFLINE.
page:ffffea0001200000 count:1 mapcount:0 mapping:0000000000000000
index:0x0
flags: 0x3fffe000001000(reserved)
raw: 003fffe000001000 ffffea0001200008 ffffea0001200008 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: unmovable page
WARNING: CPU: 25 PID: 1665 at mm/kasan/common.c:665
kasan_mem_notifier+0x34/0x23b
CPU: 25 PID: 1665 Comm: bash Tainted: G W 5.0.0+ #94
Hardware name: HP ProLiant DL180 Gen9/ProLiant DL180 Gen9, BIOS U20
10/25/2017
RIP: 0010:kasan_mem_notifier+0x34/0x23b
RSP: 0018:ffff8883ec737890 EFLAGS: 00010206
RAX: 0000000000000246 RBX: ff10f0f4435f1000 RCX: f887a7a21af88000
RDX: dffffc0000000000 RSI: 0000000000000020 RDI: ffff8881f221af88
RBP: ffff8883ec737898 R08: ffff888000000000 R09: ffffffffb0bddcd0
R10: ffffed103e857088 R11: ffff8881f42b8443 R12: dffffc0000000000
R13: 00000000fffffff9 R14: dffffc0000000000 R15: 0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560fbd31d730 CR3: 00000004049c6003 CR4: 00000000001606a0
Call Trace:
notifier_call_chain+0xbf/0x130
__blocking_notifier_call_chain+0x76/0xc0
blocking_notifier_call_chain+0x16/0x20
memory_notify+0x1b/0x20
__offline_pages+0x3e2/0x1210
offline_pages+0x11/0x20
memory_block_action+0x144/0x300
memory_subsys_offline+0xe5/0x170
device_offline+0x13f/0x1e0
state_store+0xeb/0x110
dev_attr_store+0x3f/0x70
sysfs_kf_write+0x104/0x150
kernfs_fop_write+0x25c/0x410
__vfs_write+0x66/0x120
vfs_write+0x15a/0x4f0
ksys_write+0xd2/0x1b0
__x64_sys_write+0x73/0xb0
do_syscall_64+0xeb/0xb78
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f14f75cc3b8
RSP: 002b:00007ffe84d01d68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007f14f75cc3b8
RDX: 0000000000000008 RSI: 0000563f8e433d70 RDI: 0000000000000001
RBP: 0000563f8e433d70 R08: 000000000000000a R09: 00007ffe84d018f0
R10: 000000000000000a R11: 0000000000000246 R12: 00007f14f789e780
R13: 0000000000000008 R14: 00007f14f7899740 R15: 0000000000000008
Link: http://lkml.kernel.org/r/20190320204255.53571-1-cai@lca.pw
Fixes: 7960509329c2 ("mm, memory_hotplug: print reason for the offlining failure")
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Qian Cai <cai@lca.pw>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: <stable@vger.kernel.org> [5.0.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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There are a few system calls (pselect, ppoll, etc) which replace a task
sigmask while they are running in a kernel-space
When a task calls one of these syscalls, the kernel saves a current
sigmask in task->saved_sigmask and sets a syscall sigmask.
On syscall-exit-stop, ptrace traps a task before restoring the
saved_sigmask, so PTRACE_GETSIGMASK returns the syscall sigmask and
PTRACE_SETSIGMASK does nothing, because its sigmask is replaced by
saved_sigmask, when the task returns to user-space.
This patch fixes this problem. PTRACE_GETSIGMASK returns saved_sigmask
if it's set. PTRACE_SETSIGMASK drops the TIF_RESTORE_SIGMASK flag.
Link: http://lkml.kernel.org/r/20181120060616.6043-1-avagin@gmail.com
Fixes: 29000caecbe8 ("ptrace: add ability to get/set signal-blocked mask")
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix sparse warning:
fs/proc/kcore.c:591:19: warning:
symbol 'kcore_modules' was not declared. Should it be static?
Link: http://lkml.kernel.org/r/20190320135417.13272-1-yuehaibing@huawei.com
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Mukesh Ojha <mojha@codeaurora.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Omar Sandoval <osandov@fb.com>
Cc: James Morse <james.morse@arm.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix typo of kernel-doc parameter notation (there should be no space
between '@' and the parameter name).
Also fixes bogus kernel-doc notation output formatting.
Link: http://lkml.kernel.org/r/ddce8b80-9a8a-d52d-3546-87b2211c089a@infradead.org
Fixes: 70b44595eafe9 ("mm, compaction: use free lists to quickly locate a migration source")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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While debugging something, I added a dump_page() into do_swap_page(),
and I got the splat from below. The issue happens when dereferencing
mapping->host in __dump_page():
...
else if (mapping) {
pr_warn("%ps ", mapping->a_ops);
if (mapping->host->i_dentry.first) {
struct dentry *dentry;
dentry = container_of(mapping->host->i_dentry.first, struct dentry, d_u.d_alias);
pr_warn("name:\"%pd\" ", dentry);
}
}
...
Swap address space does not contain an inode information, and so
mapping->host equals NULL.
Although the dump_page() call was added artificially into
do_swap_page(), I am not sure if we can hit this from any other path, so
it looks worth fixing it. We can easily do that by checking
mapping->host first.
Link: http://lkml.kernel.org/r/20190318072931.29094-1-osalvador@suse.de
Fixes: 1c6fb1d89e73c ("mm: print more information about mapping in __dump_page")
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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