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Pull KVM updates from Radim Krčmář:
"ARM:
- icache invalidation optimizations, improving VM startup time
- support for forwarded level-triggered interrupts, improving
performance for timers and passthrough platform devices
- a small fix for power-management notifiers, and some cosmetic
changes
PPC:
- add MMIO emulation for vector loads and stores
- allow HPT guests to run on a radix host on POWER9 v2.2 CPUs without
requiring the complex thread synchronization of older CPU versions
- improve the handling of escalation interrupts with the XIVE
interrupt controller
- support decrement register migration
- various cleanups and bugfixes.
s390:
- Cornelia Huck passed maintainership to Janosch Frank
- exitless interrupts for emulated devices
- cleanup of cpuflag handling
- kvm_stat counter improvements
- VSIE improvements
- mm cleanup
x86:
- hypervisor part of SEV
- UMIP, RDPID, and MSR_SMI_COUNT emulation
- paravirtualized TLB shootdown using the new KVM_VCPU_PREEMPTED bit
- allow guests to see TOPOEXT, GFNI, VAES, VPCLMULQDQ, and more
AVX512 features
- show vcpu id in its anonymous inode name
- many fixes and cleanups
- per-VCPU MSR bitmaps (already merged through x86/pti branch)
- stable KVM clock when nesting on Hyper-V (merged through
x86/hyperv)"
* tag 'kvm-4.16-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (197 commits)
KVM: PPC: Book3S: Add MMIO emulation for VMX instructions
KVM: PPC: Book3S HV: Branch inside feature section
KVM: PPC: Book3S HV: Make HPT resizing work on POWER9
KVM: PPC: Book3S HV: Fix handling of secondary HPTEG in HPT resizing code
KVM: PPC: Book3S PR: Fix broken select due to misspelling
KVM: x86: don't forget vcpu_put() in kvm_arch_vcpu_ioctl_set_sregs()
KVM: PPC: Book3S PR: Fix svcpu copying with preemption enabled
KVM: PPC: Book3S HV: Drop locks before reading guest memory
kvm: x86: remove efer_reload entry in kvm_vcpu_stat
KVM: x86: AMD Processor Topology Information
x86/kvm/vmx: do not use vm-exit instruction length for fast MMIO when running nested
kvm: embed vcpu id to dentry of vcpu anon inode
kvm: Map PFN-type memory regions as writable (if possible)
x86/kvm: Make it compile on 32bit and with HYPYERVISOR_GUEST=n
KVM: arm/arm64: Fixup userspace irqchip static key optimization
KVM: arm/arm64: Fix userspace_irqchip_in_use counting
KVM: arm/arm64: Fix incorrect timer_is_pending logic
MAINTAINERS: update KVM/s390 maintainers
MAINTAINERS: add Halil as additional vfio-ccw maintainer
MAINTAINERS: add David as a reviewer for KVM/s390
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Pull networking fixes from David Miller:
1) Make allocations less aggressive in x_tables, from Minchal Hocko.
2) Fix netfilter flowtable Kconfig deps, from Pablo Neira Ayuso.
3) Fix connection loss problems in rtlwifi, from Larry Finger.
4) Correct DRAM dump length for some chips in ath10k driver, from Yu
Wang.
5) Fix ABORT handling in rxrpc, from David Howells.
6) Add SPDX tags to Sun networking drivers, from Shannon Nelson.
7) Some ipv6 onlink handling fixes, from David Ahern.
8) Netem packet scheduler interval calcualtion fix from Md. Islam.
9) Don't put crypto buffers on-stack in rxrpc, from David Howells.
10) Fix handling of error non-delivery status in netlink multicast
delivery over multiple namespaces, from Nicolas Dichtel.
11) Missing xdp flush in tuntap driver, from Jason Wang.
12) Synchonize RDS protocol netns/module teardown with rds object
management, from Sowini Varadhan.
13) Add nospec annotations to mpls, from Dan Williams.
14) Fix SKB truesize handling in TIPC, from Hoang Le.
15) Interrupt masking fixes in stammc from Niklas Cassel.
16) Don't allow ptr_ring objects to be sized outside of kmalloc's
limits, from Jason Wang.
17) Don't allow SCTP chunks to be built which will have a length
exceeding the chunk header's 16-bit length field, from Alexey
Kodanev.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (82 commits)
ibmvnic: Remove skb->protocol checks in ibmvnic_xmit
bpf: fix rlimit in reuseport net selftest
sctp: verify size of a new chunk in _sctp_make_chunk()
s390/qeth: fix SETIP command handling
s390/qeth: fix underestimated count of buffer elements
ptr_ring: try vmalloc() when kmalloc() fails
ptr_ring: fail early if queue occupies more than KMALLOC_MAX_SIZE
net: stmmac: remove redundant enable of PMT irq
net: stmmac: rename GMAC_INT_DEFAULT_MASK for dwmac4
net: stmmac: discard disabled flags in interrupt status register
ibmvnic: Reset long term map ID counter
tools/libbpf: handle issues with bpf ELF objects containing .eh_frames
selftests/bpf: add selftest that use test_libbpf_open
selftests/bpf: add test program for loading BPF ELF files
tools/libbpf: improve the pr_debug statements to contain section numbers
bpf: Sync kernel ABI header with tooling header for bpf_common.h
net: phy: fix phy_start to consider PHY_IGNORE_INTERRUPT
net: thunder: change q_len's type to handle max ring size
tipc: fix skb truesize/datasize ratio control
net/sched: cls_u32: fix cls_u32 on filter replace
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Pull more NFS client updates from Trond Myklebust:
"A few bugfixes and some small sunrpc latency/performance improvements
before the merge window closes:
Stable fixes:
- fix an incorrect calculation of the RDMA send scatter gather
element limit
- fix an Oops when attempting to free resources after RDMA device
removal
Bugfixes:
- SUNRPC: Ensure we always release the TCP socket in a timely fashion
when the connection is shut down.
- SUNRPC: Don't call __UDPX_INC_STATS() from a preemptible context
Latency/Performance:
- SUNRPC: Queue latency sensitive socket tasks to the less contended
xprtiod queue
- SUNRPC: Make the xprtiod workqueue unbounded.
- SUNRPC: Make the rpciod workqueue unbounded"
* tag 'nfs-for-4.16-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
SUNRPC: Don't call __UDPX_INC_STATS() from a preemptible context
fix parallelism for rpc tasks
Make the xprtiod workqueue unbounded.
SUNRPC: Queue latency-sensitive socket tasks to xprtiod
SUNRPC: Ensure we always close the socket after a connection shuts down
xprtrdma: Fix BUG after a device removal
xprtrdma: Fix calculation of ri_max_send_sges
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This patch switch to use kvmalloc_array() for using a vmalloc()
fallback to help in case kmalloc() fails.
Reported-by: syzbot+e4d4f9ddd4295539735d@syzkaller.appspotmail.com
Fixes: 2e0ab8ca83c12 ("ptr_ring: array based FIFO for pointers")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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To avoid slab to warn about exceeded size, fail early if queue
occupies more than KMALLOC_MAX_SIZE.
Reported-by: syzbot+e4d4f9ddd4295539735d@syzkaller.appspotmail.com
Fixes: 2e0ab8ca83c12 ("ptr_ring: array based FIFO for pointers")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"These are mostly fixes and cleanups, a few new quirks, a couple of
updates related to the handling of ACPI tables and ACPICA copyrights
refreshment.
Specifics:
- Update the ACPICA kernel code to upstream revision 20180105
including:
* Assorted fixes (Jung-uk Kim)
* Support for X32 ABI compilation (Anuj Mittal)
* Update of ACPICA copyrights to 2018 (Bob Moore)
- Prepare for future modifications to avoid executing the _STA
control method too early (Hans de Goede)
- Make the processor performance control library code ignore _PPC
notifications if they cannot be handled and fix up the C1 idle
state definition when it is used as a fallback state (Chen Yu,
Yazen Ghannam)
- Make it possible to use the SPCR table on x86 and to replace the
original IORT table with a new one from initrd (Prarit Bhargava,
Shunyong Yang)
- Add battery-related quirks for Asus UX360UA and UX410UAK and add
quirks for table parsing on Dell XPS 9570 and Precision M5530 (Kai
Heng Feng)
- Address static checker warnings in the CPPC code (Gustavo Silva)
- Avoid printing a raw pointer to the kernel log in the smart battery
driver (Greg Kroah-Hartman)"
* tag 'acpi-part2-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: sbshc: remove raw pointer from printk() message
ACPI: SPCR: Make SPCR available to x86
ACPI / CPPC: Use 64-bit arithmetic instead of 32-bit
ACPI / tables: Add IORT to injectable table list
ACPI / bus: Parse tables as term_list for Dell XPS 9570 and Precision M5530
ACPICA: Update version to 20180105
ACPICA: All acpica: Update copyrights to 2018
ACPI / processor: Set default C1 idle state description
ACPI / battery: Add quirk for Asus UX360UA and UX410UAK
ACPI: processor_perflib: Do not send _PPC change notification if not ready
ACPI / scan: Use acpi_bus_get_status() to initialize ACPI_TYPE_DEVICE devs
ACPI / bus: Do not call _STA on battery devices with unmet dependencies
PCI: acpiphp_ibm: prepare for acpi_get_object_info() no longer returning status
ACPI: export acpi_bus_get_status_handle()
ACPICA: Add a missing pair of parentheses
ACPICA: Prefer ACPI_TO_POINTER() over ACPI_ADD_PTR()
ACPICA: Avoid NULL pointer arithmetic
ACPICA: Linux: add support for X32 ABI compilation
ACPI / video: Use true for boolean value
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These are mostly fixes and cleanups and removal of the no longer
needed at32ap-cpufreq driver.
Specifics:
- Drop the at32ap-cpufreq driver which is useless after the removal
of the corresponding arch (Corentin LABBE).
- Fix a regression from the 4.14 cycle in the APM idle driver by
making it initialize the polling state properly (Rafael Wysocki).
- Fix a crash on failing system suspend due to a missing check in the
cpufreq core (Bo Yan).
- Make the intel_pstate driver initialize the hardware-managed
P-state control (HWP) feature on CPU0 upon resume from system
suspend if HWP had been enabled before the system was suspended
(Chen Yu).
- Fix up the SCPI cpufreq driver after recent changes (Sudeep Holla,
Wei Yongjun).
- Avoid pointer subtractions during frequency table walks in cpufreq
(Dominik Brodowski).
- Avoid the check for ProcFeedback in ST/CZ in the cpufreq driver for
AMD processors and add a MODULE_ALIAS for cpufreq on ARM IMX (Akshu
Agrawal, Nicolas Chauvet).
- Fix the prototype of swsusp_arch_resume() on x86 (Arnd Bergmann).
- Fix up the parsing of power domains DT data (Ulf Hansson)"
* tag 'pm-part2-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
arm: imx: Add MODULE_ALIAS for cpufreq
cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx()
cpufreq: intel_pstate: Enable HWP during system resume on CPU0
cpufreq: scpi: fix error return code in scpi_cpufreq_init()
x86: hibernate: fix swsusp_arch_resume() prototype
PM / domains: Fix up domain-idle-states OF parsing
cpufreq: scpi: fix static checker warning cdev isn't an ERR_PTR
cpufreq: remove at32ap-cpufreq
cpufreq: AMD: Ignore the check for ProcFeedback in ST/CZ
x86: PM: Make APM idle driver initialize polling state
cpufreq: Skip cpufreq resume if it's not suspended
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Pull nfsd update from Bruce Fields:
"A fairly small update this time around. Some cleanup, RDMA fixes,
overlayfs fixes, and a fix for an NFSv4 state bug.
The bigger deal for nfsd this time around was Jeff Layton's
already-merged i_version patches"
* tag 'nfsd-4.16' of git://linux-nfs.org/~bfields/linux:
svcrdma: Fix Read chunk round-up
NFSD: hide unused svcxdr_dupstr()
nfsd: store stat times in fill_pre_wcc() instead of inode times
nfsd: encode stat->mtime for getattr instead of inode->i_mtime
nfsd: return RESOURCE not GARBAGE_ARGS on too many ops
nfsd4: don't set lock stateid's sc_type to CLOSED
nfsd: Detect unhashed stids in nfsd4_verify_open_stid()
sunrpc: remove dead code in svc_sock_setbufsize
svcrdma: Post Receives in the Receive completion handler
nfsd4: permit layoutget of executable-only files
lockd: convert nlm_rqst.a_count from atomic_t to refcount_t
lockd: convert nlm_lockowner.count from atomic_t to refcount_t
lockd: convert nsm_handle.sm_count from atomic_t to refcount_t
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Pull idr updates from Matthew Wilcox:
- test-suite improvements
- replace the extended API by improving the normal API
- performance improvement for IDRs which are 1-based rather than
0-based
- add documentation
* 'idr-2018-02-06' of git://git.infradead.org/users/willy/linux-dax:
idr: Add documentation
idr: Make 1-based IDRs more efficient
idr: Warn if old iterators see large IDs
idr: Rename idr_for_each_entry_ext
idr: Remove idr_alloc_ext
cls_u32: Convert to idr_alloc_u32
cls_u32: Reinstate cyclic allocation
cls_flower: Convert to idr_alloc_u32
cls_bpf: Convert to use idr_alloc_u32
cls_basic: Convert to use idr_alloc_u32
cls_api: Convert to idr_alloc_u32
net sched actions: Convert to use idr_alloc_u32
idr: Add idr_alloc_u32 helper
idr: Delete idr_find_ext function
idr: Delete idr_replace_ext function
idr: Delete idr_remove_ext function
IDR test suite: Check handling negative end correctly
idr test suite: Fix ida_test_random()
radix tree test suite: Remove ARRAY_SIZE
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git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
Kalle Valo says:
====================
wireless-drivers-next patches for 4.16
The most important here is the ssb fix, it has been reported by the
users frequently and the fix just missed the final v4.15. Also
numerous other fixes, mt76 had multiple problems with aggregation and
a long standing unaligned access bug in rtlwifi is finally fixed.
Major changes:
ath10k
* correct firmware RAM dump length for QCA6174/QCA9377
* add new QCA988X device id
* fix a kernel panic during pci probe
* revert a recent commit which broke ath10k firmware metadata parsing
ath9k
* fix a noise floor regression introduced during the merge window
* add new device id
rtlwifi
* fix unaligned access seen on ARM architecture
mt76
* various aggregation fixes which fix connection stalls
ssb
* fix b43 and b44 on non-MIPS which broke in v4.15-rc9
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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In commit c7f5d105495a ("net: Add eth_platform_get_mac_address() helper."),
two declarations were added:
int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr);
unsigned char *arch_get_platform_get_mac_address(void);
An extra '_get' was introduced in arch_get_platform_get_mac_address, remove
it. Fix compile warning using W=1:
CC net/ethernet/eth.o
net/ethernet/eth.c:523:24: warning: no previous prototype for ‘arch_get_platform_mac_address’ [-Wmissing-prototypes]
unsigned char * __weak arch_get_platform_mac_address(void)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
AR net/ethernet/built-in.o
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
"This time there are not a lot of changes coming from the IOMMU side.
That is partly because I returned from my parental leave late in the
development process and probably partly because everyone was busy with
Spectre and Meltdown mitigation work and didn't find the time for
IOMMU work. So here are the few changes that queued up for this merge
window:
- 5-level page-table support for the Intel IOMMU.
- error reporting improvements for the AMD IOMMU driver
- additional DT bindings for ipmmu-vmsa (Renesas)
- small fixes and cleanups"
* tag 'iommu-updates-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu: Clean up of_iommu_init_fn
iommu/ipmmu-vmsa: Remove redundant of_iommu_init_fn hook
iommu/msm: Claim bus ops on probe
iommu/vt-d: Enable 5-level paging mode in the PASID entry
iommu/vt-d: Add a check for 5-level paging support
iommu/vt-d: Add a check for 1GB page support
iommu/vt-d: Enable upto 57 bits of domain address width
iommu/vt-d: Use domain instead of cache fetching
iommu/exynos: Don't unconditionally steal bus ops
iommu/omap: Fix debugfs_create_*() usage
iommu/vt-d: clean up pr_irq if request_threaded_irq fails
iommu: Check the result of iommu_group_get() for NULL
iommu/ipmmu-vmsa: Add r8a779(70|95) DT bindings
iommu/ipmmu-vmsa: Add r8a7796 DT binding
iommu/amd: Set the device table entry PPR bit for IOMMU V2 devices
iommu/amd - Record more information about unknown events
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull more arm64 updates from Catalin Marinas:
"As I mentioned in the last pull request, there's a second batch of
security updates for arm64 with mitigations for Spectre/v1 and an
improved one for Spectre/v2 (via a newly defined firmware interface
API).
Spectre v1 mitigation:
- back-end version of array_index_mask_nospec()
- masking of the syscall number to restrict speculation through the
syscall table
- masking of __user pointers prior to deference in uaccess routines
Spectre v2 mitigation update:
- using the new firmware SMC calling convention specification update
- removing the current PSCI GET_VERSION firmware call mitigation as
vendors are deploying new SMCCC-capable firmware
- additional branch predictor hardening for synchronous exceptions
and interrupts while in user mode
Meltdown v3 mitigation update:
- Cavium Thunder X is unaffected but a hardware erratum gets in the
way. The kernel now starts with the page tables mapped as global
and switches to non-global if kpti needs to be enabled.
Other:
- Theoretical trylock bug fixed"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (38 commits)
arm64: Kill PSCI_GET_VERSION as a variant-2 workaround
arm64: Add ARM_SMCCC_ARCH_WORKAROUND_1 BP hardening support
arm/arm64: smccc: Implement SMCCC v1.1 inline primitive
arm/arm64: smccc: Make function identifiers an unsigned quantity
firmware/psci: Expose SMCCC version through psci_ops
firmware/psci: Expose PSCI conduit
arm64: KVM: Add SMCCC_ARCH_WORKAROUND_1 fast handling
arm64: KVM: Report SMCCC_ARCH_WORKAROUND_1 BP hardening support
arm/arm64: KVM: Turn kvm_psci_version into a static inline
arm/arm64: KVM: Advertise SMCCC v1.1
arm/arm64: KVM: Implement PSCI 1.0 support
arm/arm64: KVM: Add smccc accessors to PSCI code
arm/arm64: KVM: Add PSCI_VERSION helper
arm/arm64: KVM: Consolidate the PSCI include files
arm64: KVM: Increment PC after handling an SMC trap
arm: KVM: Fix SMCCC handling of unimplemented SMC/HVC calls
arm64: KVM: Fix SMCCC handling of unimplemented SMC/HVC calls
arm64: entry: Apply BP hardening for suspicious interrupts from EL0
arm64: entry: Apply BP hardening for high-priority synchronous exceptions
arm64: futex: Mask __user pointers prior to dereference
...
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* pm-cpufreq:
arm: imx: Add MODULE_ALIAS for cpufreq
cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx()
cpufreq: intel_pstate: Enable HWP during system resume on CPU0
cpufreq: scpi: fix error return code in scpi_cpufreq_init()
cpufreq: scpi: fix static checker warning cdev isn't an ERR_PTR
cpufreq: remove at32ap-cpufreq
cpufreq: AMD: Ignore the check for ProcFeedback in ST/CZ
cpufreq: Skip cpufreq resume if it's not suspended
* pm-cpuidle:
x86: PM: Make APM idle driver initialize polling state
* pm-domains:
PM / domains: Fix up domain-idle-states OF parsing
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Pointer subtraction is slow and tedious. Therefore, replace all instances
where cpufreq_for_each_{valid_,}entry loops contained such substractions
with an iteration macro providing an index to the frequency_table entry.
Suggested-by: Al Viro <viro@ZenIV.linux.org.uk>
Link: http://lkml.kernel.org/r/20180120020237.GM13338@ZenIV.linux.org.uk
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux
Pull inode->i_version cleanup from Jeff Layton:
"Goffredo went ahead and sent a patch to rename this function, and
reverse its sense, as we discussed last week.
The patch is very straightforward and I figure it's probably best to
go ahead and merge this to get the API as settled as possible"
* tag 'iversion-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
iversion: Rename make inode_cmp_iversion{+raw} to inode_eq_iversion{+raw}
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Pull fbdev updates from Bartlomiej Zolnierkiewicz:
"There is nothing really major here:
- fix display-timings lookup in the Device Tree in atmel_lcdfb driver
(Johan Hovold)
- fix video mode and line_length to be set correctly in vfb driver
(Pieter "PoroCYon" Sluys)
- fix returning nonsensical values to the user-space on GIO_FONTX
ioctl when using dummy console (Nicolas Pitre)
- add missing license tag to mmpfb driver (Arnd Bergmann)
- convert radeonfb and pxa3xx_gcu drivers to use ktime_get[_ts64]()
instead of the deprecated do_gettimeofday() (Arnd Bergmann)
- switch udlfb driver from using the pr_*() logging functions to the
dev_*() ones + related cleanups (Ladislav Michl)
- use __raw I/O accessors also on arm64 (Ji Zhang)
- fix Kconfig help text for intelfb driver (Randy Dunlap)
- do not duplicate features data in omapfb driver (Ladislav Michl)
- misc cleanups (Colin Ian King, Markus Elfring, Rasmus Villemoes,
Vasyl Gomonovych, Himanshu Jha, Michael Trimarchi)"
* tag 'fbdev-v4.16' of git://github.com/bzolnier/linux: (25 commits)
video: udlfb: Switch from the pr_*() to the dev_*() logging functions
video: udlfb: Constify read only data
video: fbdev/mmp: add MODULE_LICENSE
console/dummy: leave .con_font_get set to NULL
fbdev: mxsfb: use framebuffer_alloc in the correct way
video: udlfb: Do not name private data 'dev'
video: udlfb: Remove noisy warnings
video: udlfb: Remove redundant gdev variable
video: udlfb: Remove unnecessary local variable
fbdev: auo_k190x: Use zeroing memory allocator instead of allocator/memset
vfb: fix video mode and line_length being set when loaded
fbdev: arm64 use __raw I/O memory api
omapfb: dss: Do not duplicate features data
video: fbdev: omap2: Use PTR_ERR_OR_ZERO()
fbdev: au1200fb: delete duplicate header contents
fbdev: pxa3xx: use ktime_get_ts64 for time stamps
fbdev: radeon: use ktime_get() for HZ calibration
video: smscufx: Improve a size determination in two functions
video: udlfb: Delete an unnecessary return statement in two functions
video: udlfb: Improve a size determination in dlfb_alloc_urb_list()
...
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The response to a write_space notification is very latency sensitive,
so we should queue it to the lower latency xprtiod_workqueue. This
is something we already do for the other cases where an rpc task
holds the transport XPRT_LOCKED bitlock.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Tobias Schramm <tobleminer@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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The declaration for swsusp_arch_resume() marks it as 'asmlinkage',
but the definition in x86-32 does not, and it fails to include
the header with the declaration. This leads to a warning when
building with link-time-optimizations:
kernel/power/power.h:108:23: error: type of 'swsusp_arch_resume' does not match original declaration [-Werror=lto-type-mismatch]
extern asmlinkage int swsusp_arch_resume(void);
^
arch/x86/power/hibernate_32.c:148:0: note: 'swsusp_arch_resume' was previously declared here
int swsusp_arch_resume(void)
This moves the declaration into a globally visible header file
and fixes up both x86 definitions to match it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The DEFINE_SHOW_ATTRIBUTE() helper macro would be useful for current
users, which are many of them, and for new comers to decrease code
duplication.
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Darren Hart (VMware) <dvhart@infradead.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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SPCR is currently only enabled or ARM64 and x86 can use SPCR to setup
an early console.
General fixes include updating Documentation & Kconfig (for x86),
updating comments, and changing parse_spcr() to acpi_parse_spcr(),
and earlycon_init_is_deferred to earlycon_acpi_spcr_enable to be
more descriptive.
On x86, many systems have a valid SPCR table but the table version is
not 2 so the table version check must be a warning.
On ARM64 when the kernel parameter earlycon is used both the early console
and console are enabled. On x86, only the earlycon should be enabled by
by default. Modify acpi_parse_spcr() to allow options for initializing
the early console and console separately.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Mark Salter <msalter@redhat.com>
Tested-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
|
Merge misc updates from Andrew Morton:
- kasan updates
- procfs
- lib/bitmap updates
- other lib/ updates
- checkpatch tweaks
- rapidio
- ubsan
- pipe fixes and cleanups
- lots of other misc bits
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (114 commits)
Documentation/sysctl/user.txt: fix typo
MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns
MAINTAINERS: update various PALM patterns
MAINTAINERS: update "ARM/OXNAS platform support" patterns
MAINTAINERS: update Cortina/Gemini patterns
MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern
MAINTAINERS: remove ANDROID ION pattern
mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
mm: docs: fix parameter names mismatch
mm: docs: fixup punctuation
pipe: read buffer limits atomically
pipe: simplify round_pipe_size()
pipe: reject F_SETPIPE_SZ with size over UINT_MAX
pipe: fix off-by-one error when checking buffer limits
pipe: actually allow root to exceed the pipe buffer limits
pipe, sysctl: remove pipe_proc_fn()
pipe, sysctl: drop 'min' parameter from pipe-max-size converter
kasan: rework Kconfig settings
crash_dump: is_kdump_kernel can be boolean
kernel/mutex: mutex_is_locked can be boolean
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
- membarrier updates (Mathieu Desnoyers)
- SMP balancing optimizations (Mel Gorman)
- stats update optimizations (Peter Zijlstra)
- RT scheduler race fixes (Steven Rostedt)
- misc fixes and updates
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Use a recently used CPU as an idle candidate and the basis for SIS
sched/fair: Do not migrate if the prev_cpu is idle
sched/fair: Restructure wake_affine*() to return a CPU id
sched/fair: Remove unnecessary parameters from wake_affine_idle()
sched/rt: Make update_curr_rt() more accurate
sched/rt: Up the root domain ref count when passing it around via IPIs
sched/rt: Use container_of() to get root domain in rto_push_irq_work_func()
sched/core: Optimize update_stats_*()
sched/core: Optimize ttwu_stat()
membarrier/selftest: Test private expedited sync core command
membarrier/arm64: Provide core serializing command
membarrier/x86: Provide core serializing command
membarrier: Provide core serializing command, *_SYNC_CORE
lockin/x86: Implement sync_core_before_usermode()
locking: Introduce sync_core_before_usermode()
membarrier/selftest: Test global expedited command
membarrier: Provide GLOBAL_EXPEDITED command
membarrier: Document scheduler barrier requirements
powerpc, membarrier: Skip memory barrier in switch_mm()
membarrier/selftest: Test private expedited command
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixlets from Ingo Molnar:
"An endianness fix and a jump labels branch hint update"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/qrwlock: include asm/byteorder.h as needed
jump_label: Add branch hints to static_branch_{un,}likely()
|
|
Pull networking fixes from David Miller:
1) Fix error path in netdevsim, from Jakub Kicinski.
2) Default values listed in tcp_wmem and tcp_rmem documentation were
inaccurate, from Tonghao Zhang.
3) Fix route leaks in SCTP, both for ipv4 and ipv6. From Alexey Kodanev
and Tommi Rantala.
4) Fix "MASK < Y" meant to be "MASK << Y" in xgbe driver, from Wolfram
Sang.
5) Use after free in u32_destroy_key(), from Paolo Abeni.
6) Fix two TX issues in be2net driver, from Suredh Reddy.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (25 commits)
be2net: Handle transmit completion errors in Lancer
be2net: Fix HW stall issue in Lancer
RDS: IB: Fix null pointer issue
nfp: fix kdoc warnings on nested structures
sample/bpf: fix erspan metadata
net: erspan: fix erspan config overwrite
net: erspan: fix metadata extraction
cls_u32: fix use after free in u32_destroy_key()
net: amd-xgbe: fix comparison to bitshift when dealing with a mask
net: phy: Handle not having GPIO enabled in the kernel
ibmvnic: fix empty firmware version and errors cleanup
sctp: fix dst refcnt leak in sctp_v4_get_dst
sctp: fix dst refcnt leak in sctp_v6_get_dst()
dwc-xlgmac: remove Jie Deng as co-maintainer
doc: Change the min default value of tcp_wmem/tcp_rmem.
samples/bpf: use bpf_set_link_xdp_fd
libbpf: add missing SPDX-License-Identifier
libbpf: add error reporting in XDP
libbpf: add function to setup XDP
tools: add netlink.h and if_link.h in tools uapi
...
|
|
A pipe's size is represented as an 'unsigned int'. As expected, writing a
value greater than UINT_MAX to /proc/sys/fs/pipe-max-size fails with
EINVAL. However, the F_SETPIPE_SZ fcntl silently truncates such values to
32 bits, rather than failing with EINVAL as expected. (It *does* fail
with EINVAL for values above (1 << 31) but <= UINT_MAX.)
Fix this by moving the check against UINT_MAX into round_pipe_size() which
is called in both cases.
Link: http://lkml.kernel.org/r/20180111052902.14409-6-ebiggers3@gmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
pipe_proc_fn() is no longer needed, as it only calls through to
proc_dopipe_max_size(). Just put proc_dopipe_max_size() in the ctl_table
entry directly, and remove the unneeded EXPORT_SYMBOL() and the ENOSYS
stub for it.
(The reason the ENOSYS stub isn't needed is that the pipe-max-size
ctl_table entry is located directly in 'kern_table' rather than being
registered separately. Therefore, the entry is already only defined when
the kernel is built with sysctl support.)
Link: http://lkml.kernel.org/r/20180111052902.14409-3-ebiggers3@gmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Patch series "pipe: buffer limits fixes and cleanups", v2.
This series simplifies the sysctl handler for pipe-max-size and fixes
another set of bugs related to the pipe buffer limits:
- The root user wasn't allowed to exceed the limits when creating new
pipes.
- There was an off-by-one error when checking the limits, so a limit of
N was actually treated as N - 1.
- F_SETPIPE_SZ accepted values over UINT_MAX.
- Reading the pipe buffer limits could be racy.
This patch (of 7):
Before validating the given value against pipe_min_size,
do_proc_dopipe_max_size_conv() calls round_pipe_size(), which rounds the
value up to pipe_min_size. Therefore, the second check against
pipe_min_size is redundant. Remove it.
Link: http://lkml.kernel.org/r/20180111052902.14409-2-ebiggers3@gmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Make is_kdump_kernel return bool due to this particular function only
using either one or zero as its return value.
No functional change.
Link: http://lkml.kernel.org/r/1513308799-19232-8-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Make mutex_is_locked return bool due to this particular function only
using either one or zero as its return value.
No functional change.
Link: http://lkml.kernel.org/r/1513266622-15860-7-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Make module_is_live return bool due to this particular function only using
either one or zero as its return value.
No functional change.
Link: http://lkml.kernel.org/r/1513266622-15860-6-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Make iomem_is_exclusive return bool due to this particular function only
using either one or zero as its return value.
No functional change.
Link: http://lkml.kernel.org/r/1513266622-15860-5-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Make current_cpuset_is_being_rebound return bool due to this particular
function only using either one or zero as its return value.
No functional change.
Link: http://lkml.kernel.org/r/1513266622-15860-4-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Make __lockref_is_dead return bool due to this function only using either
true or false as its return value.
No functional change.
Link: http://lkml.kernel.org/r/1513266622-15860-3-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Make memblock_is_map/region_memory return bool due to these two
functions only using either true or false as its return value.
No functional change.
Link: http://lkml.kernel.org/r/1513266622-15860-2-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This macro is only used by net/ipv6/mcast.c, but there is no reason
why it must be BUILD_BUG_ON_NULL().
Replace it with BUILD_BUG_ON_ZERO(), and remove BUILD_BUG_ON_NULL()
definition from <linux/build_bug.h>.
Link: http://lkml.kernel.org/r/1515121833-3174-3-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Do not duplicate BUILD_BUG_ON*. Use ones from <linux/build_bug.h>.
Link: http://lkml.kernel.org/r/1515121833-3174-2-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
There are several functions that do find_task_by_vpid() followed by
get_task_struct(). We can use a helper function instead.
Link: http://lkml.kernel.org/r/1509602027-11337-1-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
CPUmasks are never big enough to warrant 64-bit code.
Space savings:
add/remove: 0/0 grow/shrink: 1/4 up/down: 3/-17 (-14)
Function old new delta
sched_init_numa 1530 1533 +3
compat_sys_sched_setaffinity 160 159 -1
sys_sched_getaffinity 197 195 -2
sys_sched_setaffinity 183 176 -7
compat_sys_sched_getaffinity 179 172 -7
Link: http://lkml.kernel.org/r/20171204165531.GA8221@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
print_ip_sym() is mostly used for debugging, so I think it should print
the raw addresses.
Link: http://lkml.kernel.org/r/1514519382-405-1-git-send-email-chenhc@lemote.com
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: "Tobin C. Harding" <me@tobin.cc>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
We've measured that we spend ~0.6% of sys cpu time in cpumask_next_and().
It's essentially a joined iteration in search for a non-zero bit, which is
currently implemented as a lookup join (find a nonzero bit on the lhs,
lookup the rhs to see if it's set there).
Implement a direct join (find a nonzero bit on the incrementally built
join). Also add generic bitmap benchmarks in the new `test_find_bit`
module for new function (see `find_next_and_bit` in [2] and [3] below).
For cpumask_next_and, direct benchmarking shows that it's 1.17x to 14x
faster with a geometric mean of 2.1 on 32 CPUs [1]. No impact on memory
usage. Note that on Arm, the new pure-C implementation still outperforms
the old one that uses a mix of C and asm (`find_next_bit`) [3].
[1] Approximate benchmark code:
```
unsigned long src1p[nr_cpumask_longs] = {pattern1};
unsigned long src2p[nr_cpumask_longs] = {pattern2};
for (/*a bunch of repetitions*/) {
for (int n = -1; n <= nr_cpu_ids; ++n) {
asm volatile("" : "+rm"(src1p)); // prevent any optimization
asm volatile("" : "+rm"(src2p));
unsigned long result = cpumask_next_and(n, src1p, src2p);
asm volatile("" : "+rm"(result));
}
}
```
Results:
pattern1 pattern2 time_before/time_after
0x0000ffff 0x0000ffff 1.65
0x0000ffff 0x00005555 2.24
0x0000ffff 0x00001111 2.94
0x0000ffff 0x00000000 14.0
0x00005555 0x0000ffff 1.67
0x00005555 0x00005555 1.71
0x00005555 0x00001111 1.90
0x00005555 0x00000000 6.58
0x00001111 0x0000ffff 1.46
0x00001111 0x00005555 1.49
0x00001111 0x00001111 1.45
0x00001111 0x00000000 3.10
0x00000000 0x0000ffff 1.18
0x00000000 0x00005555 1.18
0x00000000 0x00001111 1.17
0x00000000 0x00000000 1.25
-----------------------------
geo.mean 2.06
[2] test_find_next_bit, X86 (skylake)
[ 3913.477422] Start testing find_bit() with random-filled bitmap
[ 3913.477847] find_next_bit: 160868 cycles, 16484 iterations
[ 3913.477933] find_next_zero_bit: 169542 cycles, 16285 iterations
[ 3913.478036] find_last_bit: 201638 cycles, 16483 iterations
[ 3913.480214] find_first_bit: 4353244 cycles, 16484 iterations
[ 3913.480216] Start testing find_next_and_bit() with random-filled
bitmap
[ 3913.481074] find_next_and_bit: 89604 cycles, 8216 iterations
[ 3913.481075] Start testing find_bit() with sparse bitmap
[ 3913.481078] find_next_bit: 2536 cycles, 66 iterations
[ 3913.481252] find_next_zero_bit: 344404 cycles, 32703 iterations
[ 3913.481255] find_last_bit: 2006 cycles, 66 iterations
[ 3913.481265] find_first_bit: 17488 cycles, 66 iterations
[ 3913.481266] Start testing find_next_and_bit() with sparse bitmap
[ 3913.481272] find_next_and_bit: 764 cycles, 1 iterations
[3] test_find_next_bit, arm (v7 odroid XU3).
[ 267.206928] Start testing find_bit() with random-filled bitmap
[ 267.214752] find_next_bit: 4474 cycles, 16419 iterations
[ 267.221850] find_next_zero_bit: 5976 cycles, 16350 iterations
[ 267.229294] find_last_bit: 4209 cycles, 16419 iterations
[ 267.279131] find_first_bit: 1032991 cycles, 16420 iterations
[ 267.286265] Start testing find_next_and_bit() with random-filled
bitmap
[ 267.302386] find_next_and_bit: 2290 cycles, 8140 iterations
[ 267.309422] Start testing find_bit() with sparse bitmap
[ 267.316054] find_next_bit: 191 cycles, 66 iterations
[ 267.322726] find_next_zero_bit: 8758 cycles, 32703 iterations
[ 267.329803] find_last_bit: 84 cycles, 66 iterations
[ 267.336169] find_first_bit: 4118 cycles, 66 iterations
[ 267.342627] Start testing find_next_and_bit() with sparse bitmap
[ 267.356919] find_next_and_bit: 91 cycles, 1 iterations
[courbet@google.com: v6]
Link: http://lkml.kernel.org/r/20171129095715.23430-1-courbet@google.com
[geert@linux-m68k.org: m68k/bitops: always include <asm-generic/bitops/find.h>]
Link: http://lkml.kernel.org/r/1512556816-28627-1-git-send-email-geert@linux-m68k.org
Link: http://lkml.kernel.org/r/20171128131334.23491-1-courbet@google.com
Signed-off-by: Clement Courbet <courbet@google.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Yury Norov <ynorov@caviumnetworks.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Behaviour of bitmap_fill() differs from bitmap_zero() in a way how bits
behind bitmap are handed. bitmap_zero() clears entire bitmap by unsigned
long boundary, while bitmap_fill() mimics bitmap_set().
Here we change bitmap_fill() behaviour to be consistent with bitmap_zero()
and add a note to documentation.
The change might reveal some bugs in the code where unused bits are
handled differently and in such cases bitmap_set() has to be used.
Link: http://lkml.kernel.org/r/20180109172430.87452-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
with bitmap_{from,to}_arr32 over the kernel. Additionally to it:
* __check_eq_bitmap() now takes single nbits argument.
* __check_eq_u32_array is not used in new test but may be used in
future. So I don't remove it here, but annotate as __used.
Tested on arm64 and 32-bit BE mips.
[arnd@arndb.de: perf: arm_dsu_pmu: convert to bitmap_from_arr32]
Link: http://lkml.kernel.org/r/20180201172508.5739-2-ynorov@caviumnetworks.com
[ynorov@caviumnetworks.com: fix net/core/ethtool.c]
Link: http://lkml.kernel.org/r/20180205071747.4ekxtsbgxkj5b2fz@yury-thinkpad
Link: http://lkml.kernel.org/r/20171228150019.27953-2-ynorov@caviumnetworks.com
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: David Decotigny <decot@googlers.com>,
Cc: David S. Miller <davem@davemloft.net>,
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This patchset replaces bitmap_{to,from}_u32array with more simple and
standard looking copy-like functions.
bitmap_from_u32array() takes 4 arguments (bitmap_to_u32array is similar):
- unsigned long *bitmap, which is destination;
- unsigned int nbits, the length of destination bitmap, in bits;
- const u32 *buf, the source; and
- unsigned int nwords, the length of source buffer in ints.
In description to the function it is detailed like:
* copy min(nbits, 32*nwords) bits from @buf to @bitmap, remaining
* bits between nword and nbits in @bitmap (if any) are cleared.
Having two size arguments looks unneeded and potentially dangerous.
It is unneeded because normally user of copy-like function should take
care of the size of destination and make it big enough to fit source
data.
And it is dangerous because function may hide possible error if user
doesn't provide big enough bitmap, and data becomes silently dropped.
That's why all copy-like functions have 1 argument for size of copying
data, and I don't see any reason to make bitmap_from_u32array()
different.
One exception that comes in mind is strncpy() which also provides size
of destination in arguments, but it's strongly argued by the possibility
of taking broken strings in source. This is not the case of
bitmap_{from,to}_u32array().
There is no many real users of bitmap_{from,to}_u32array(), and they all
very clearly provide size of destination matched with the size of
source, so additional functionality is not used in fact. Like this:
bitmap_from_u32array(to->link_modes.supported,
__ETHTOOL_LINK_MODE_MASK_NBITS,
link_usettings.link_modes.supported,
__ETHTOOL_LINK_MODE_MASK_NU32);
Where:
#define __ETHTOOL_LINK_MODE_MASK_NU32 \
DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
In this patch, bitmap_copy_safe and bitmap_{from,to}_arr32 are introduced.
'Safe' in bitmap_copy_safe() stands for clearing unused bits in bitmap
beyond last bit till the end of last word. It is useful for hardening
API when bitmap is assumed to be exposed to userspace.
bitmap_{from,to}_arr32 functions are replacements for
bitmap_{from,to}_u32array. They don't take unneeded nwords argument, and
so simpler in implementation and understanding.
This patch suggests optimization for 32-bit systems - aliasing
bitmap_{from,to}_arr32 to bitmap_copy_safe.
Other possible optimization is aliasing 64-bit LE bitmap_{from,to}_arr32 to
more generic function(s). But I didn't end up with the function that would
be helpful by itself, and can be used to alias 64-bit LE
bitmap_{from,to}_arr32, like bitmap_copy_safe() does. So I preferred to
leave things as is.
The following patch switches kernel to new API and introduces test for it.
Discussion is here: https://lkml.org/lkml/2017/11/15/592
[ynorov@caviumnetworks.com: rename bitmap_copy_safe to bitmap_copy_clear_tail]
Link: http://lkml.kernel.org/r/20180201172508.5739-3-ynorov@caviumnetworks.com
Link: http://lkml.kernel.org/r/20171228150019.27953-1-ynorov@caviumnetworks.com
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: David Decotigny <decot@googlers.com>,
Cc: David S. Miller <davem@davemloft.net>,
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Exported header doesn't use anything from <linux/string.h>,
it is <linux/uuid.h> which uses memcmp().
Link: http://lkml.kernel.org/r/20171225171121.GA22754@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Right now the fact that KASAN uses a single shadow byte for 8 bytes of
memory is scattered all over the code.
This change defines KASAN_SHADOW_SCALE_SHIFT early in asm include files
and makes use of this constant where necessary.
[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/34937ca3b90736eaad91b568edf5684091f662e3.1515775666.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Detect frees of pointers into middle of mempool objects.
I did a one-off test, but it turned out to be very tricky, so I reverted
it. First, mempool does not call kasan_poison_kfree() unless allocation
function fails. I stubbed an allocation function to fail on second and
subsequent allocations. But then mempool stopped to call
kasan_poison_kfree() at all, because it does it only when allocation
function is mempool_kmalloc(). We could support this special failing
test allocation function in mempool, but it also can't live with kasan
tests, because these are in a module.
Link: http://lkml.kernel.org/r/bf7a7d035d7a5ed62d2dd0e3d2e8a4fcdf456aa7.1514378558.git.dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>a
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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__builtin_return_address(1) is unreliable without frame pointers.
With defconfig on kmalloc_pagealloc_invalid_free test I am getting:
BUG: KASAN: double-free or invalid-free in (null)
Pass caller PC from callers explicitly.
Link: http://lkml.kernel.org/r/9b01bc2d237a4df74ff8472a3bf6b7635908de01.1514378558.git.dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>a
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Patch series "kasan: detect invalid frees".
KASAN detects double-frees, but does not detect invalid-frees (when a
pointer into a middle of heap object is passed to free). We recently had
a very unpleasant case in crypto code which freed an inner object inside
of a heap allocation. This left unnoticed during free, but totally
corrupted heap and later lead to a bunch of random crashes all over kernel
code.
Detect invalid frees.
This patch (of 5):
Detect frees of pointers into middle of large heap objects.
I dropped const from kasan_kfree_large() because it starts propagating
through a bunch of functions in kasan_report.c, slab/slub nearest_obj(),
all of their local variables, fixup_red_left(), etc.
Link: http://lkml.kernel.org/r/1b45b4fe1d20fc0de1329aab674c1dd973fee723.1514378558.git.dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>a
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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