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git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Pull EFI updates from Ard Biesheuvel:
- Set the LoaderDevicePartUUID EFI variable from the stub to help
systemd discover the file system layout when booting straight into
Linux without GRUB or systemd-boot (Vincent Mailhol)
- Some GUID deduplication work from Vincent
- Remove pointless UTF16->UTF8 and vice versa conversions from the stub
- Some kmap() -> kmap_local_page() conversions in the capsule loader
- Add a runtime control to en/disable EFI runtime services so that
PREEMPT_RT systems can enable them as needed
- Add a 'nostatfs' mount option to efivarfs so that the cost of
querying the EFI variable store (which is already rate limited) can
be avoided entirely on systems where it is disproportionately costly
- Rework the EFI libstub Makefile to align x86 with other
architectures, and inherit/adapt the global CFLAGS variable rather
than reconstruct it from scratch
- Constify attributes of statically allocated sysfs nodes
- Avoid register x18 when building the arm64 EFI stub, in order to
comply with the UEFI spec, and to permit it to execute in a context
where x18 is special
- Preserve the physical addresses of all EFI config tables that may be
of interest to an incoming kexec kernel
- Add some LKDTM tests for EFI runtime crashes where the faulting
address is inside a EFI memory region
- Other minor bug fixes and cosmetic cleanups
* tag 'efi-next-for-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi: (35 commits)
lkdtm: Add more EFI runtime tests
efi: Initialize all configuration table addresses to EFI_INVALID_TABLE_ADDR
efi: Retain the address of the LINUX_EFI_MEMRESERVE table
efi/libstub: Don't replace an existing LINUX_EFI_MEMRESERVE table
efi/runtime-wrappers: Don't park the worker after a recovered firmware fault
efi: Use sysfs_emit() not sprintf() to generate sysfs file contents
efi: Constify sysfs attributes
efi/libstub: Disable kernel stack erasing in the common flags
efi/libstub: Build the x86 stub from KBUILD_CFLAGS
efi/libstub: Declare the x86 stub's assembly entry points
efi/libstub: arm64: Don't use the platform register x18
efi/libstub: Free cmdline_ptr in efi_pe_entry
efi/riscv: libstub: Don't set image_size in handle_kernel_image()
efi/libstub: Fix error unwind freeing fdt in allocate_new_fdt_and_exit_boot()
efivarfs: add nostatfs mount option to skip QueryVariableInfo()
efi/libstub: add initial Boot Loader Interface support
efi/libstub: Add efi_snprintf() to construct wide strings
efi/libstub: Add support for printing human readable GUIDs
efi/libstub: Output UTF-16 directly from vsnprintf()
efi/libstub: Avoid efi_puts() for compile time constant strings
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull Char/Misc/IIO/others driver updates from Greg KH:
"Here is the big set of char/misc/android/iio and other small driver
subsystem patches for 7.4-rc1. Loads of stuff in here, larger than
normal. Highlights include:
- removal of the C binder code, the rust version is stable and will
be used going forward in a few billion devices. Great job by those
developers
- loads and loads of IIO driver updates and feature additions
- speakup driver fixes and updates
- mhi driver updates
- mei driver updates
- xillybus driver fixes
- comedi driver fixes
- lots of coresight driver updates
- Interconnect driver updates
- nvmem driver updates and fixes
- slimbus driver updates and fixes
- spmi driver updates and fixes
- lots of tiny misc and char driver fixes based on people scanning
for things
All of these have been in linux-next for a while with no reported
issues, other than a merge conflict with one of the rust tree files,
which should be simple to resolve"
* tag 'char-misc-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (446 commits)
rust_binder: wake epoll on self-work queued to poll thread
rust_binder: avoid overflow in get_node_debug_info()
MAINTAINERS: Add Abel as SPMI co-maintainer
spmi: mtk-pmif: Fix clock reference leak in mtk_spmi_bus_probe()
iio: adc: qcom-spmi-iadc: Remove regmap R/W wrapper functions
iio: adc: qcom-spmi-iadc: Migrate to devm_spmi_subdevice_alloc_and_add()
misc: qcom-coincell: Migrate to devm_spmi_subdevice_alloc_and_add()
phy: qualcomm: eusb2-repeater: Migrate to devm_spmi_subdevice_alloc_and_add()
power: reset: qcom-pon: Migrate to devm_spmi_subdevice_alloc_and_add()
nvmem: qcom-spmi-sdam: Migrate to devm_spmi_subdevice_alloc_and_add()
spmi: Add helper to get a parent SPMI device
spmi: Implement spmi_subdevice_alloc_and_add() and devm variant
spmi: Remove unneeded goto in spmi_device_add() error path
spmi: Print error status with %pe format
spmi: Remove redundant dev_name() print in spmi_device_add()
spmi: Fix potential use-after-free by grabbing of_node reference
spmi: mtk-pmif: Add workaround for FSM lockup/error in read operation
MAINTAINERS: Add Qualcomm SPMI controller entry
spmi: pmic-arb: return 0 in spmi_pmic_arb_register_buses() on success
comedi: addi_apci_3xxx: fix subdevice count underallocation
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Paolo Abeni:
"This includes a significant number of low-priority fixes - especially
in the NIC drivers area - that we deferred from the last few RCs in
the previous cycle, which can't be easily outlined in the synopsis
below.
Core & protocols:
- Continue the work on removing rtnl_lock dependencies:
- per-netns ARP and ND neighbour tables, with the default settings
now configurable per netns (inheritance from init_net is
controlled by the new net.core.neigh_inherit_init_net sysctl)
- RCU-protected configuration and rtnl_lock-less fill_info() for
hsr, netkit, sit, vlan and vxlan devices
- per-netns device unregistration for ip tunnel and gre devices
- use the netdev instance lock instead of rtnl_lock when reading
speed and duplex via sysfs
- batch the flushing of uncached routes at device unregistration
time, relieving rtnl_lock contention on netns dismantle.
- Add hardware pacing offload support, admin-controlled via a new
rtnetlink attribute, with sch_fq integration (implemented in idpf).
- Re-segment BIG TCP GSO packets into GSO packets fitting the egress
device limits instead of plain MSS-sized segments, improving
throughput for mixed BIG TCP / non-BIG TCP paths by up to 70%.
- Generate RSS keys that spread flows over all the RX queues; the
previous random keys could leave some queues unused.
- Optimize the bridge VLAN forwarding paths: cache the port-VLAN in
fdb entries and consider only VLAN members when flooding, for ~10%
more Mpps in the fdb forwarding path.
- A few TCP/IP performance improvements aimed at efficient cache
usage and reducing contention.
- Add the TCP ROCCET congestion control, a CUBIC variant aimed at
avoiding bufferbloat in cellular networks.
- Continue the conversion of getsockopt callbacks to sockopt_t.
- Add an ethtool command to list the front-facing ports of an
interface, including SFP cages and modules, using the phy_port
representation.
- Enable BIG TCP support for bareudp tunnels.
- Remove the IPV6_ADDRFORM socket option and disallow buggy TCP state
transitions (listen() + shutdown() + connect() and connect() +
connect(AF_UNSPEC) + listen()).
- Remove most BUG_ON()s from core packet processing, replacing them
with error paths.
Wireless:
- Latency improvements, including lockless station get/dump and
beacon updates, plus RTNL reduction and locking cleanups.
- Infrastructure for non-station TX/RX with MLO.
- NAN (Wi-Fi Aware) Instant Communication support and other NAN
improvements.
- Control frame Integrity Protocol (CIP) and protected TWT support.
- Improvements for AP regulatory checks.
Netfilter:
- Disable br_netfilter in user namespaces and schedule it for removal
in 2027.
- Restrict the raw table in nft_compat to the specific family, hook
and priority.
- Prepare the flowtable for mixed IPv4-over-IPv6 tunneling (and vice
versa).
- Use GFP_KERNEL_ACCOUNT for most netfilter allocations, for better
integration with memcg.
- Allow discovering conntrack zone filtering support in ctnetlink
dumps, and fix nfnetlink_hook handling of large dumps.
Deletions:
- Move the LLC type 2 sockets out of tree. There are no known users
and the code attracts a never-ending stream of LLM-driven fixes.
Device drivers:
- New drivers:
- Meta Platforms NIC (mpnic), the second-generation NIC from Meta
- initial skeleton of the Nebula-matrix NICs driver (nbl)
- X-Powers AC200/AC300 Fast Ethernet PHYs
- Ethernet high-speed NICs:
- Intel:
- i40e: XDP metadata support for RX hash and VLAN tag
- ice: expose the E825 TSPLL state via the DPLL subsystem
- nVidia/Mellanox:
- move the data direct infrastructure from IB to core, in
preparation for netdev support.
- reduce the memory used per offloaded TC rule
- Meta (fbnic):
- support large io_uring zero-copy RX buffers
- Microsoft vNIC (mana):
- add BQL support
- Ethernet NICs consumer, and embedded:
- Airoha:
- LRO offload support
- Cadence (macb):
- context swapping for ringparam and MTU changes, avoiding
buffer loss under memory pressure
- Mucse (rnpgbe):
- TX/RX and link status support
- NXP (enetc):
- SR-IOV improvements and VF support for ENETC v4
- Qualcomm (ppe):
- IPQ5424 support
- Realtek PCI (r8169):
- phylink support
- RSS support for RTL8127
- Renesas (ravb):
- gPTP support for R-Car Gen4
- Synopsys (stmmac):
- XDP multi-buffer support on the TX side
- tc mqprio hw queue priority offload
- support for RK3568 SGMII, Allwinner H616 EMAC1, UltraRISC
DP1000 and Qualcomm sa8255p
- Ethernet switches:
- Mediatek (mt7530):
- fast age and change conduit support
- Microchip (ksz):
- support for KSZ8995XA/KS8995XA
- Microchip (lan966x):
- PCIe FDMA support, ~20x throughput increase in PCIe endpoint
- Microchip (sparx5):
- Time Aware Shaper (taprio) offload
- Motorcomm (yt921x):
- LED and SerDes PCS support
- Realtek (rtl8365mb):
- EEE support
- Ethernet PHYs:
- Broadcom:
- enable jumbo frames on BCM54xx
- Realtek:
- support for RTL8261CE_CG and RTL8261D_VM
- MDIO support for RTL838x and RTL839x
- WiFi drivers:
- Broadcom (brcmfmac):
- FT/OKC roaming offload
- Intel (iwlwifi):
- UHR sniffer support
- support for newer UEFI/BIOS tables
- MediaTek (mt76):
- mt7925 NAN improvements
- offchannel/scan improvements and MLO fixes
- Morse Micro (mm81x):
- monitor mode support
- Qualcomm (ath12k):
- IPQ5332 platform infrastructure
- Realtek (rtw88):
- RTL8723BS support
- SDIO TX performance improvements
- Realtek (rtw89):
- P2P_DEVICE support
- BT-coex updates for RTL8922D
- Bluetooth:
- move H:4 reassembly into the Bluetooth core
- add generic support for vendor packets
- MGMT: add security level changed event
- Bluetooth drivers:
- btusb: support Bulk Serialization Mode
- Intel: support Draco and Titan Lake, allow unsigned firmware
- Mediatek: MT7928 support
- Qualcomm: QCC2072 support
- Broadcom: Synaptics 4384 support"
* tag 'net-next-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2126 commits)
Bluetooth: btusb: disable by default Qualcomm multi-subsystem
tipc: fix broadcast sender hang on last acker departure
tipc: fix use-after-free of broadcast reception link at node release
r8169: clear TX LPI on RTL8168h at link up after phylink conversion
tun: Require CAP_NET_ADMIN to attach to an ownerless device
net/sched/sch_cake: drop dead nla_nest_end() error check
net/sched/sch_cake: widen buffer_used to u64
net/sched/sch_cake: reduce parent backlog when clearing a tin
net/sched/sch_cake: serialize reconfiguration with the datapath
tg3: Add Datto SIRIS 5 1U Server to restart AER quirk table
net/mlx5e: Stop asserting for RTNL when closing channels
net: shrink the payload-only part of skb dataref to one bit
net: wwan: iosm: validate msg_head before indexing msg_ring
net: bgmac: rate limit RX error messages
selftests: net: veth: test XDP_TX to a peer with GRO enabled
veth: schedule the peer's NAPI after XDP_TX when only GRO is enabled
pppoe: delete session hash entries by pointer match
net: lan969x: don't disable hardirqs in fdma tx clear
net: sparx5/lan969x: do not clobber the PSFP cycle timer update period
net: lan969x: fix DSM calendar for empty taxis
...
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git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening updates from Kees Cook:
- Provide kmalloc_obj*-style API for devm_kmalloc()
- Improve seq_buf API for saner C String handling with several bug
fixes along the way (Kees Cook, Bill Wendling)
- Overflow helper readability improvements (Bill Wendling)
- Unexport native_write_cr4() (Dennis Chen)
- um: fix CONFIG_GCOV for built-in code (Johannes Berg)
- Improve stackinit test coverage (Justin Stitt)
- KMSAN: fix memset() when using fortify-source, again (Arnd Bergmann)
- lkdtm: use kmalloc() instead of __get_free_page (Mahad Ibrahim)
- signalfd: don't dequeue the forced fatal signals (Oleg Nesterov)
- Fix randstruct to recognize new container_of() behavior
- coccinelle: kmalloc_obj: Convert multi-byte integral allocations too
- Fix a couple remaining allocation return type mismatches
* tag 'hardening-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (29 commits)
overflow: Match arithmetic in both parts of __builtin_choose_expr
lkdtm: Make UNSET_SMEP built-in-only and unexport native_write_cr4()
extcon: realtek: Remove const from type_c_cfg allocation type
coresight: cti: Add const to con_groups allocation type
docs: core-api: Document the seq_buf API
nvdimm: ndtest: Return the string length from flags_show()
powerpc/papr_scm: Return the string length from the sysfs show functions
seq_buf: Add seq_buf_init_append()
bpf: Remove dead newline stripping from format_disasm_line()
seq_buf: Add seq_buf_terminate()
seq_buf: Add seq_buf_strlen()
seq_buf: Clear what a writer did not claim when a seq_buf overflows
seq_buf: Copy what fits when seq_buf_puts() and seq_buf_putmem() overflow
scsi: lpfc: Print rx monitor records straight into the seq_buf
seq_buf: Do not pop from an overflowed seq_buf
seq_buf: Do not print an empty line from an overflowed seq_buf_do_printk()
.get_maintainer.ignore: Add Kees Cook
devres: Provide kmalloc_obj*-style API for devm_kmalloc
mm: Move default_gfp() into gfp_types.h
kunit/stackinit: Clean up XFAIL under instrumentation
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Catalin Marinas:
"Here are the arm64 updates for 7.4.
The more interesting bits are the removal of big-endian kernel support
(already marked BROKEN for some time), preemptible this_cpu_*()
operations and MPAM support for the firmware-backed (Fb) interface.
CCA (Arm's confidential compute) is slowly trickling in with host RMI
(Realm Management Interface) support and some refactoring, including a
dedicated SMCCC bus to advertise firmware services. There are also the
usual PMU updates for new hardware and a few fixes/cleanups.
Core features:
- Remove big-endian kernel support: CONFIG_CPU_BIG_ENDIAN has
depended on BROKEN for a while, so drop the remaining code (BE
hypervisor object, BPF JIT, assembly/crypto/library routines,
endianness helper macros, selftests) and force a little-endian
build
- Add preemptible this_cpu_*() operations (read/write, RMW, xchg,
cmpxchg and cmpxchg128) that no longer need to disable preemption
around the per-CPU address generation and access
- Preparation patches for implementing CONFIG_HOTPLUG_PARALLEL on
arm64
Memory management:
- Treat faults taken by EFI runtime firmware as kernel faults
- Clear PTE_WRITE for EFI_MEMORY_RO mappings (with hardware dirty
state management enabled, this is not truly read-only)
- Raise the default ARCH_MMAP_RND_BITS for 48-bit and 52-bit VA
configurations (28/26/24 bits for 4K/16K/64K pages)
- Implement clear_page[s]() using memset()
- Enable BBML2 no-abort (a.k.a. BBML3) for the NVIDIA Rigel CPU
Perf and PMU:
- Support for HiSilicon's ITS PMU
- Add support for some new events: INST_SIMD_ALU_VEC for Apple PMUs
and a cycle counter for the latest version of HiSilicon's MN PMU
hardware
- A bunch of fixes to the CXL PMU driver to address pre-existing
issues from Sashiko
- Fix generation of PERF_RECORD_ITRACE_START records for SPE and ETM
drivers
- Reduce excessive stack consumption in the Marvell DDR PMU driver
- Minor driver updates and cleanups all over
Arm Confidential Compute Architecture (CCA):
- Add an Arm SMCCC bus for firmware services discovered through SMCCC
and move the TRNG and CCA guest (TSM provider) drivers onto it,
removing the dummy CCA platform device and adding a sysfs ABI for
Realm guests
- Move the Realm Service Interface (RSI) code out of arch/arm64/ into
drivers/firmware/arm_rmm/
- Add the host side of the Realm Management Interface (RMI): detect,
configure and activate the RMM, add SRO support and wrappers for
the Realm RMI commands
- Block hibernation (new arch hook in the PM core) and kexec while
the RMM is active. To be revisited in the future with proper
support for deactivation
- Handle Granule Protection Faults (GPFs) taken by the host, caused
by accesses to memory delegated to the RMM. In a future patch, the
exception table lookup will be limited to is_kdump_kernel() cases
MPAM (Memory Partitioning And Monitoring):
- Add support for the MPAM firmware-backed (Fb) interface, allowing
MSC accesses to be mediated by firmware
- Fix a list of theoretical issues with the driver (MSC access error
propagation, MBWU monitor save/restore and locking, resctrl class
handling, error interrupt restore, maximum number of PARTIDs)
- Add the mailing list and a missing file to the MAINTAINERS entry
- Document when to set arm64.nompam
Errata and CPU features:
- Add the NXP i.MX8QM/8QP workaround for the Cortex-A53 cache
coherency issue (ERR050104), using a new ARM64_CPUCAP_SOC_ERRATUM
capability type for SoC-level errata
Miscellaneous:
- Mask debug exceptions (DAIF) around the hardware breakpoint
register manipulations when called from generic kernel code
- Don't zero the SVE state buffer when the SVE state is live
- Return -EPERM instead of -EBUSY from the GCS prctl() locking
failures (matching x86), with the selftest updated. Slight ABI
change but no software deployment yet
- kselftest: fix unsound MTE fault skipping by introducing MTE-safe
memory accessors, avoid copying each signal test binary more than
once
- Update sysreg definitions (fix three enum values and two field
names, mark architecturally dropped fields as RES0) and remove the
TME transaction state check from the BRBE driver
- Fix the description of ARM64_HAS_LPA2 and remove a redundant
ID_AA64MMFR0 define"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (144 commits)
arm64: cpufeature: Enable BBML2 for NVIDIA Rigel
arm64: cputype: Add NVIDIA Rigel definitions
arm64: raise default ARCH_MMAP_RND_BITS for 48-bit and 52-bit VA
arm64/debug: mask debug exceptions when called from common code
kselftest/arm64: signal: copy each test binary only once
kselftest/arm64: Check for -EPERM not -EBUSY in the locking test
arm64: gcs: Return -EPERM not -EBUSY for prctl() locking failures
perf: arm_brbe: Remove the check for TME transaction states
arm64: sysreg: Mark fields the architecture dropped as RES0
arm64: sysreg: Fix the names of two misspelt fields
arm64: sysreg: Fix three incorrect enum values
arm64: smp: Defer RCU registration during secondary CPU bringup
arm64: smp: Don't bother printing the I-cache policy for each CPU
arm64: smp: Defer update of secondary CPU capabilities
arm64: smp: Tidy up cpuinfo init and cpufeature updates
arm64: smp: Tidy up smp_prepare_cpus()
arm64: cpufeature: Store every ID register with its overrides applied
arm64: cpufeature: Read MPAMIDR_EL1 in __cpuinfo_store_cpu()
arm64: cpufeature: Add read_cpuid_with_overrides()
arm64: cpufeature: Check arm64_ftr_regs[] before the first store
...
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull file table updates from Christian Brauner:
"This annotates struct fdtable's fd array with __counted_by_ptr so
KASAN and the fortified functions can bounds check it against max_fds
and adds a KUnit suite for fdtable. A follow-up uses __struct_size()
in the test since sparse doesn't know __builtin_dynamic_object_size().
FD_PREPARE() is simplified. It was built as an ACQUIRE-style guard on
infrastructure that was never needed. The ACQUIRE machinery and
CLASS_INIT() go away, the variable is declared with __cleanup()
directly, struct fd_prepare loses its err field since the fd either
holds the descriptor or the error, and callers get a const pointer to
the guard behind a UNIQUE_ID() name so they can't shadow it. Code
generation is identical"
* tag 'vfs-7.4-rc1.file' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
file: make struct fd_prepare const and kill its err field
cleanup: remove CLASS_INIT()
file: declare the FD_PREPARE() variable with __cleanup() directly
file: simplify FD_PREPARE()
vfs: use __struct_size() in the fdtable KUnit test
vfs: Add KUnit tests for fdtable
vfs: Annotate struct fdtable's fd field with __counted_by_ptr
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Two bugs were found in the arm64 EFI runtime support that weren't caught
by LKDTM. The existing EFI_RUNTIME_CRASH test instructs the firmware to
write to kernel memory that is mapped read-only, which usually fails as
expected. However, this does not exercise the runtime mapping logic in
the kernel, nor the fault recovery logic when the faulting address is
inside the EFI runtime memory regions itself.
So add two more test cases:
- a write to R/O memory test that uses the firmware's own executable
memory as an output buffer
- a branch to memory that is occupied by the firmware's runtime services
function table, which is usually mapped non-execute.
This depends on the EFI memory attributes table having been exposed by
the firmware and having been taken into account by the runtime mapping
code, so this is used as a prerequisite by the new tests, otherwise it
produces an XFAIL.
Reviewed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi into char-misc-next
Stephen writes:
More than a handful of changes for SPMI. I'm bringing on Abel
Vesa to help maintain SPMI so the tree may change in the future
but we'll probably continue to send patches when the pile is
small.
The big change here is that we gained a new function
spmi_subdevice_alloc_and_add() to support complex PMICs that have
different devices spread throughout the SPMI address. We've grown
subdevice drivers that use OF APIs directly to figure out some
base address to add to all their register read/write operations
which is tightly coupling our parent/child drivers. This change
allows us to clean all those drivers up to use standard device
APIs and their own regmap instead of relying on a parent SPMI
driver to do all the heavy lifting. The series also updated
drivers that could use the new API and I picked those all up
because they were acked by maintainers.
Beyond that we have some minor fixes to the Qualcomm and Mediatek
SPMI drivers for bugs in software and hardware and a couple
maintainer updates as stated earlier.
* tag 'spmi-for-next' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi:
MAINTAINERS: Add Abel as SPMI co-maintainer
spmi: mtk-pmif: Fix clock reference leak in mtk_spmi_bus_probe()
iio: adc: qcom-spmi-iadc: Remove regmap R/W wrapper functions
iio: adc: qcom-spmi-iadc: Migrate to devm_spmi_subdevice_alloc_and_add()
misc: qcom-coincell: Migrate to devm_spmi_subdevice_alloc_and_add()
phy: qualcomm: eusb2-repeater: Migrate to devm_spmi_subdevice_alloc_and_add()
power: reset: qcom-pon: Migrate to devm_spmi_subdevice_alloc_and_add()
nvmem: qcom-spmi-sdam: Migrate to devm_spmi_subdevice_alloc_and_add()
spmi: Add helper to get a parent SPMI device
spmi: Implement spmi_subdevice_alloc_and_add() and devm variant
spmi: Remove unneeded goto in spmi_device_add() error path
spmi: Print error status with %pe format
spmi: Remove redundant dev_name() print in spmi_device_add()
spmi: Fix potential use-after-free by grabbing of_node reference
spmi: mtk-pmif: Add workaround for FSM lockup/error in read operation
MAINTAINERS: Add Qualcomm SPMI controller entry
spmi: pmic-arb: return 0 in spmi_pmic_arb_register_buses() on success
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Some Qualcomm PMICs integrate a charger for coincells, usually
powering an RTC when external (or main battery) power is missing.
Instead of using the parent SPMI device (the main PMIC) as a kind
of syscon in this driver, register a new SPMI sub-device and
initialize its own regmap with this sub-device's specific base
address, retrieved from the devicetree.
This allows to stop manually adding the register base address to
every R/W call in this driver, as this can be, and is now, handled
by the regmap API instead.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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native_write_cr4 should not be exported to modules. Commit 21953ee5013d
("x86/cpu: Export native_write_cr4() only when CONFIG_LKTDM=m")
restricted the export somewhat, but native_write_cr4() is still exposed
to all GPL-compatible modules when CONFIG_LKDTM=m.
UNSET_SMEP is the only module user of native_write_cr4(). Restrict
the test to CONFIG_LKDTM=y and remove the export. When LKDTM is
built as a module, report XFAIL for UNSET_SMEP.
Suggested-by: Christoph Hellwig <hch@infradead.org>
Link: https://lore.kernel.org/all/20200420090102.GB24518@infradead.org/
Signed-off-by: Dennis Chen <dechen@redhat.com>
Link: https://patch.msgid.link/20261014175859.30863-1-dechen@redhat.com
Signed-off-by: Kees Cook <kees@kernel.org>
|
|
When a function-like macro expands to an expression, that expression
doesn't need a semicolon after it. All uses have been verified to
have their own semicolons.
This was found using the following Coccinelle semantic patch:
@r@
identifier i : script:ocaml() { String.lowercase_ascii i = i };
expression e;
@@
*#define i(...) e;
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Link: https://patch.msgid.link/20260801191002.1383835-14-Julia.Lawall@inria.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The 32-bit MSR interfaces rdmsr() and wrmsr() are planned to be
removed. Use the related 64-bit variants instead.
Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://patch.msgid.link/20261008071839.2247074-10-jgross@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Fix typos in comments, reported by scripts/checkpatch.pl using the
misspelling list in scripts/spelling.txt. One further misspelling of
"respectively" in genwqe/card_base.c is fixed as well: it is not in
scripts/spelling.txt, but it sits a few lines from one that checkpatch
does report. Only comments are touched, there are no code changes.
Assisted-by: LLM
Signed-off-by: Hemanth Selam <hemanth.selam@gmail.com>
Acked-by: Vishnu Dasa <vishnu.dasa@broadcom.com>
Link: https://patch.msgid.link/20261006060118.41933-1-hemanth.selam@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
vsc_tp_xfer() computes the packet CRC over sizeof(pkt) + olen bytes,
but pkt is a pointer, so sizeof(pkt) evaluates to the pointer size
instead of the size of struct vsc_tp_packet_hdr. The value correctly
match the 8-byte header on 64-bit builds.
Use sizeof(pkt->hdr), consistent with the header size used everywhere
else in the driver, e.g. in VSC_TP_PACKET_SIZE().
Cc: stable@kernel.org
Fixes: 566f5ca97680 ("mei: Add transport driver for IVSC device")
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://patch.msgid.link/20261006-vcs_fix_crc-v1-1-b7b149f13c1d@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
tifm_device_remove() sets sock->dev.driver to NULL after calling the
driver's remove() callback. Since commit a995fe1a3aa7 ("rust: driver:
drop device private data post unbind"), device_unbind_cleanup()
dereferences dev->driver after the bus remove() callback has returned,
so removing a card from a TI FlashMedia reader oopses:
BUG: kernel NULL pointer dereference, address: 0000000000000090
Workqueue: tifm tifm_7xx1_switch_media [tifm_7xx1]
RIP: 0010:device_unbind_cleanup+0x16/0xb0
Call Trace:
device_release_driver_internal+0x220/0x260
device_release_driver+0x12/0x20
bus_remove_device+0xf9/0x1c0
device_del+0x161/0x3b0
device_unregister+0x17/0x70
tifm_7xx1_switch_media.cold+0x6b/0xbd [tifm_7xx1]
process_one_work+0x1ac/0x3d0
worker_thread+0x1b8/0x360
kthread+0xf7/0x130
ret_from_fork+0x195/0x2a0
ret_from_fork_asm+0x1a/0x30
The driver core clears dev->driver itself in device_unbind_cleanup(), so
there is no need for the bus code to do it. Remove the assignment.
The problem was found and the fix written with the help of an AI coding
assistant. Tested on a Dell Precision M6500 (TI PCIxx12 FlashMedia,
104c:803b) running a 7.0 kernel: removing an SD card oopsed every time
without the fix; with it, insert, read and remove work.
Fixes: a995fe1a3aa7 ("rust: driver: drop device private data post unbind")
Cc: stable@kernel.org
Assisted-by: LLM
Signed-off-by: Joshua Mulloy <joshuamulloy@gmail.com>
Link: https://patch.msgid.link/20261004102525.34356-1-joshuamulloy@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The issei driver is Intel specific and hence x86 only.
Fixes: 65f0ecb9ec85c ("issei: initial driver skeleton")
Cc: stable <stable@kernel.org>
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Link: https://patch.msgid.link/20261003150433.1369234-1-pbrobinson@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Allocating and freeing Audio PD memory from userspace is unsafe because
the kernel cannot reliably determine when the DSP has finished using the
memory. Userspace may free buffers while they are still in use by the DSP,
and remote free requests cannot be safely trusted.
Additionally, the current implementation allows userspace to repeatedly
grow the Audio PD heap, but does not support shrinking it. This can lead
to unbounded memory usage over time, effectively causing a memory leak.
Fix this by allocating the entire Audio PD reserved-memory region during
rpmsg probe and tying its lifetime to the rpmsg channel. This removes
userspace-controlled alloc/free and ensures that memory is reclaimed only
when the DSP process is torn down.
The reserved-memory region is now mandatory for the Audio PD domain.
Rather than failing rpmsg probe when it is missing, validate it in
fastrpc_init_create_static_process() and reject only the static-process
creation. This keeps the fastrpc device probing for all other domains
even on a misconfigured device tree.
Fixes: 0871561055e66 ("misc: fastrpc: Add support for audiopd")
Cc: stable@kernel.org
Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Link: https://lore.kernel.org/all/20260814101955.234238-1-jianping.li@oss.qualcomm.com/
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20261002101220.1084101-3-srinivas.kandagatla@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
map->table is assigned right after dma_buf_map_attachment_unlocked()
succeeds. The two failure checks that follow, the len > map->size test
and, where subsystem VMIDs are configured, a failed qcom_scm_assign_mem(),
jump to map_err with map->table already set.
map_err manually calls dma_buf_detach() and dma_buf_put() and then falls
through to fastrpc_map_put(). Since that change the error path tail is
fastrpc_map_put() -> fastrpc_free_map(), and fastrpc_free_map() already
unmaps, detaches and puts the dma-buf whenever map->table is set.
The two operations therefore run twice: the second dma_buf_put() drops an
extra reference on map->buf, and dma_buf_unmap_attachment_unlocked()
dereferences the map->attach already freed by the manual dma_buf_detach().
kref_init() sets the refcount to 1 with no intervening get, so the final
fastrpc_map_put() frees the map synchronously and the redundant cleanup is
deterministic.
The len > map->size branch is reachable by an unprivileged process via
FASTRPC_IOCTL_MEM_MAP with an fd whose dma-buf is smaller than the
requested length, before any DSP invocation.
Route both map->table-is-set failure branches to get_err instead of
map_err, so fastrpc_free_map() is the single owner of the
unmap/detach/put sequence. map_err is retained for the
dma_buf_map_attachment_unlocked() failure, which is reached with
map->table still NULL and an attachment that fastrpc_free_map() will not
clean up, so its dma_buf_detach()/dma_buf_put() must still run manually.
Fixes: 334f1a1cbe03 ("misc: fastrpc: Use fastrpc_map_put in fastrpc_map_create on fail")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Yifei Gao <gyf161023@gmail.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20261002101220.1084101-2-srinivas.kandagatla@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The TC9564_PCI config option selects PCI_DYNAMIC_OF_NODES. But that
depends on OF_IRQ, and TC9564_PCI does not satisfy that dependency.
Simply adding "depends on OF_IRQ" results in a recursive Kconfig
dependency.
A little experimentation shows that *depending on* rather than
*selecting* PCI_QUIRKS allows us to avoid the recursion when
depending on OF_IRQ.
Separately, PCI_DYNAMIC_OF_NODES is a user-visible option, so it
should be depended on, not selected. Changing this allows some
further simplification.
PCI_DYNAMIC_OF_NODES is only exposed as an option if PCI is enabled,
so by depending on it, we can omit the dependency on PCI.
Additionally, PCI_DYNAMIC_OF_NODES depends on OF_IRQ, so we can omit
the explicit OF_IRQ dependency.
Finally, OF_IRQ is only exposed as an option if OF is enabled, so we
can skip explicitly depending on OF as well.
In summary, depending on (rather than selecting) PCI_DYNAMIC_OF_NODES
satisfies the dependencies on PCI, OF_IRQ, and OF. We still need to
*depend on* PCI_QUIRKS, to avoid the circular dependency related to
OF_IRQ.
Simplify the dependencies for TC9564_PCI to just depending on
PCI_DYNAMIC_OF_NODES and PCI_QUIRKS.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202610020124.ieOiopjQ-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202610021154.ObogJhHN-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202610021249.J94Hg1xo-lkp@intel.com/
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 1304b0c47ef81 ("misc: tc9564: introduce base PCI driver")
Signed-off-by: Alex Elder <elder@riscstar.com>
Link: https://patch.msgid.link/20261002155709.492894-1-elder@riscstar.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Add the fdma interrupt (OIC interrupt 14) to the lan966x PCI device
tree overlay, enabling FDMA-based frame injection/extraction when
the switch is connected over PCIe.
Tested-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260928-lan966x-pci-fdma-v9-15-a17caf60f89a@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
The ATU outbound windows used by the FDMA engine are programmed through
registers at offset 0x400000+, which falls outside the current cpu reg
mapping. Extend the cpu reg size from 0x100000 (1MB) to 0x800000 (8MB)
to cover the full PCIE DBI and iATU register space.
Tested-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260928-lan966x-pci-fdma-v9-14-a17caf60f89a@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Use the devres-managed devm_of_reserved_mem_device_init() to ensure
the reserved memory region is released on device removal, fixing a
missing of_reserved_mem_device_release() in fastrpc_rpmsg_remove().
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20261002101302.1084243-3-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
and session messages
On some platforms the DSP firmware does not support the fastrpc
capability/attribute query. The DSP side returns an error (err: -1)
while handling the request, so fastrpc_get_info_from_dsp() does not
return DSP_UNSUPPORTED_API but a generic error, and the "else if (err)"
branch in fastrpc_get_info_from_kernel() is taken.
cctx->valid_attributes is therefore never set and every open()/query
re-prints the same "dsp information is incorrect" line. This is not
tied to boot timing: it can be reproduced at any time by manually
starting adsprpcd. On RC builds with metadata flashing enabled several
clients come up and flood the console.
As this is an expected, platform-specific and non-fatal condition,
downgrade the message to dev_dbg. Similarly, the absence of reserved
DMA memory is a valid configuration and does not indicate an error,
so downgrade that message to dev_dbg as well. Also rate-limit the
"No session available" message with dev_err_ratelimited(): it reflects
a genuine failure (open() returns -EBUSY) so it should still be visible,
but must not flood dmesg when the session pool is exhausted.
No functional change intended.
Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
Link: https://lore.kernel.org/all/20260514062825.50172-1-jianping.li@oss.qualcomm.com/
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20261002101302.1084243-2-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
ibmvmc_init_crq_queue() allocates the CRQ message queue that is shared
with the hypervisor. The queue is mapped for DMA and registered with the
hypervisor by its DMA address.
This buffer can be allocated with kmalloc() as there's nothing special
about it to go directly to the page allocator.
kmalloc() provides a better API that does not require ugly casts and
kfree() does not need to know the size of the freed object.
Performance difference between kmalloc() and __get_free_pages() is not
measurable as both allocators take an object/page from a per-CPU list for
fast path allocations.
For the slow path the performance is anyway determined by the amount of
reclaim involved rather than by what allocator is used.
Replace use of get_zeroed_page() with kzalloc() and free_page() with
kfree().
Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Assisted-by: copilot:claude-opus
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Link: https://patch.msgid.link/20260830-char-misc-v1-3-05e2ce44f291@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The Toshiba TC9564 is small and highly-specialized SoC that implements
a PCIe switch as well as an Ethernet AVB/TSN bridge. In addition to
these, the SoC implements other functions, including a reset and clock
controller, an address translation unit, and a few other devices. PCIe
BARs provide access to registers that manage these IP blocks, and the
SoC is modeled using a PCI endpoint bus in devicetree. This allows the
IP blocks to be bound to platform drivers that do MMIO via the PCI BARs.
Create a new PCI driver under drivers/misc that binds with the embedded
PCI endpoint functions within the TC9564 SoC. Because these functions
will use devicetree pci-ep-bus to provide access to other IP blocks
within the TC9564 chip, the main purpose of this driver is to do basic
PCI initialization, then call of_platform_default_populate() to scan for
the any endpoint bus children, and probe all devices defined therein.
Because we're using pci-ep-bus, we need to use the PCI quirks mechanism
to have of_pci_make_dev_node() be called for each endpoint device in
pci_bus_add_device() (via pci_fixup_device(pci_fixup_final, dev)).
Co-developed-by: Daniel Thompson <daniel@riscstar.com>
Signed-off-by: Daniel Thompson <daniel@riscstar.com>
Signed-off-by: Alex Elder <elder@riscstar.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # quirks.c
Link: https://patch.msgid.link/20260918152659.413268-3-elder@riscstar.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
request_threaded_irq() enables the interrupt before returning, so the
threaded handler may schedule work while the probe is still initializing
its mutexes and work item. Initialize that state first and only free the
IRQ on paths where the request succeeded.
Fixes: 566f5ca97680 ("mei: Add transport driver for IVSC device")
Assisted-by: LLM
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Link: https://patch.msgid.link/20260929132245.2152433-1-runyu.xiao@seu.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
ad525x_group is registered through the I2C and SPI drivers' dev_groups.
The driver core creates those groups only after probe succeeds and removes
them before invoking the driver's remove callback. ad_dpot_probe() sets
the driver data before returning successfully, so ad525x_is_visible()
cannot legitimately observe a NULL value.
Drop the redundant check instead of silently hiding every attribute if
the driver lifecycle invariant is ever broken.
Signed-off-by: Jiale Yao <yaojiale02@163.com>
Link: https://patch.msgid.link/20260927123507.1219495-1-yaojiale02@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Convert open-coded if/else with set_bit/clear_bit to the assign_bit API.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://patch.msgid.link/20260919130759.3041493-1-peng.fan@oss.nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Add PCI error handler callbacks.
Stop and disable communication when error is detected;
reset the link and re-enable communication then device is
restored.
Co-developed-by: Menachem Adin <menachem.adin@intel.com>
Signed-off-by: Menachem Adin <menachem.adin@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://patch.msgid.link/20260902-cri_aer-v1-1-b0571c399265@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Improve performance of polling by reducing active timeout.
20 ms active timeout helps increase channel throughtput
and significately reduces data transfer times.
Our tests have prooved that timeout decrease does no ill effects
for core CPU utilization.
Reviewed-by: Menachem Adin <menachem.adin@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://patch.msgid.link/20260831-cri_polling-v1-4-d927315e6598@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Polling thread should not access hardware when not active.
Check for active state under device lock to avoid such
access when hardware is powered down.
Reviewed-by: Menachem Adin <menachem.adin@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://patch.msgid.link/20260831-cri_polling-v1-3-d927315e6598@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Add option to poll instead of waiting for the interrupt
to wallpaper over hardware not releasing the interrupt line.
Enable this workaround and leave option to use interrupts when
hardware is fixed.
Reviewed-by: Menachem Adin <menachem.adin@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://patch.msgid.link/20260831-cri_polling-v1-2-d927315e6598@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Polling thread wait should be interruptible to avoid stuck task.
Reviewed-by: Menachem Adin <menachem.adin@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://patch.msgid.link/20260831-cri_polling-v1-1-d927315e6598@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
free_ddcb_queue() does not release the per-DDCB wait queues,
which leaks memory whenever the service layer is released.
Signed-off-by: Xuewen Wang <wangxuewen@kylinos.cn>
Link: https://patch.msgid.link/20260902075405.944687-1-wangxuewen@kylinos.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
request_irq() may succeed while vio_enable_interrupts() fails. The
shared error path freed the CRQ and killed the tasklet but left the IRQ
registered. Call free_irq() before jumping to that path.
Signed-off-by: Li Youhong <liyouhong@kylinos.cn>
Link: https://patch.msgid.link/20260828072040.209200-1-dayou5941@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Convert the deprecated SIMPLE_DEV_PM_OPS
to DEFINE_SIMPLE_DEV_PM_OPS
and pm_sleep_ptr().
This lets us drop the __maybe_unused annotations
from the suspend and resume callbacks,
also reduces kernel size in case CONFIG_PM or
CONFIG_PM_SLEEP is disabled.
Also allow to remove #ifdef CONFIG_PM_SLEEP.
Signed-off-by: Triet Hoang <triet.hoang.dev@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://patch.msgid.link/20260821121315.23574-1-triet.hoang.dev@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
CBOR encodes byte-string lengths from 0 through 23 directly in the
additional-information field. cbor_object_get_array() only handles 23,
so shorter byte strings leave array_len uninitialized. Reserved values
28 through 30 and the unsupported indefinite-length encoding also fall
through without assigning it.
parse_resp_get_random() then uses the indeterminate value for bounds
checking and as the byte count returned to the hwrng core. This can
reject a valid short response or report an incorrect amount of entropy.
Decode the complete inline-length range and reject unsupported values.
Extended definite-length encodings retain their existing behavior, and
the existing size and INT_MAX checks continue to bound the returned
slice.
This issue was found by a static analysis checker and confirmed by
manual source review.
Fixes: b9873755a6c8 ("misc: Add Nitro Secure Module driver")
Assisted-by: unnamed:claude-opus-4.8 typestate
Signed-off-by: Ruoyu Wang <ruoyuw560@gmail.com>
Link: https://patch.msgid.link/20260815151745.3758574-1-ruoyuw560@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
nsm_device_probe() registers an hwrng provider and /dev/nsm.
hwrng_register() can make this the current RNG, and the hwrng fill kthread
finds it through the RCU-protected get_current_rng() rather than under the
rng_mutex that hwrng_register() holds, so it can be in nsm_rng_read()
offering buffers and kicking the queue before probe has returned.
The driver never calls virtio_device_ready(), so DRIVER_OK is set on its
behalf by virtio_dev_probe(), only once probe has returned. The virtio
spec is explicit about that ordering in 3.1 Device Initialization:
| The driver MUST NOT send any buffer available notifications to the
| device before setting DRIVER_OK.
A device that waits for DRIVER_OK before servicing the queue therefore
leaves that read unanswered.
Set DRIVER_OK once the virtqueue exists and before either interface is
registered, so that the queue is usable by the time anything that can reach
it is published; commit f5866db64f34 ("virtio_console: enable VQs early")
and commit 1d774589f924 ("i2c: virtio: mark device ready before registering
the adapter") do the same for the same reason. The err_hwrng and err_misc
paths then unwind a device that is live, so reset it before deleting the
virtqueue - the core only adds VIRTIO_CONFIG_S_FAILED to the status when
probe fails, it does not reset.
Fixes: b9873755a6c8 ("misc: Add Nitro Secure Module driver")
Signed-off-by: Jasper Wise <jaspwise@amazon.co.uk>
Link: https://patch.msgid.link/20260813083752.581981-1-jaspwise@amazon.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
After device_register() fails, the embedded struct device has already been
initialized and must be released with put_device() so that
enclosure_release() can drop the parent reference and free edev.
The error path currently does put_device(parent) + kfree(edev), which
skips the device lifetime rules and can free the object while the device
core still owns a reference (use-after-free).
Fixes: d569d5bb3fd9 ("[SCSI] enclosure: add support for enclosure services")
Signed-off-by: Linkai Gong <gonglinkai@kylinos.cn>
Link: https://patch.msgid.link/20260806070358.1599627-1-gonglinkai@kylinos.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Now that arm64 no longer supports a big-endian kernel, simplify some
driver Kconfig entries so that the dependency on a little-endian kernel
no longer needs to be called out explicitly.
Reviewed-by: Michael Kelley <mhklinux@outlook.com> # Hyper-V
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Will Deacon <will@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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FD_PREPARE() releases the fd as soon as the file expression fails. The
fd either holds the descriptor or the error. The separate field is
redundant. Make fd and file plain members and struct fd_prepare simpler.
Callers of FD_PREPARE() get a const pointer to the guard. Simplify all
users as they can now easily access the trivial struct.
No functional changes.
Link: https://patch.msgid.link/20260917-work-file-fd_prepare-v1-4-b87534ca49f3@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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lkdtm_debugfs_entry and direct_entry use __get_free_page to allocate a
temporary buffer, perform copy_from_user to get the crashtype name,
strim() to strip whitespace and find_crashtype to find the corresponding
crashtype that is being requested.
The lkdtm_debugfs_read uses __get_free_page to allocate a temporary
buffer to store all the available crashtypes, and then copy it to
userspace.
The buffers that are allocated can be allocated with kmalloc as there is
nothing special that requires a struct page, or the page allocator.
kmalloc() additionally provides a better API that doesn't require ugly
casts which obfuscate the code and kfree does not need to know the size
of the freed object.
Replace use of __get_free_page() with kmalloc().
Signed-off-by: Mahad Ibrahim <mahad.ibrahim.dev@gmail.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Link: https://patch.msgid.link/20260722230246.2869-1-mahad.ibrahim.dev@gmail.com
Signed-off-by: Kees Cook <kees@kernel.org>
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Let's start the 7.3 drm-misc-fixes cycle.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc/IIO/etc driver updates from Greg KH:
"Here is the big set of char, misc, iio, counter, fpga, and other small
driver subsystems for 7.3-rc1.
Overall, due to some driver removals we only added a bit more code
than removed, which was a nice change. Highlights in this merge
request are:
- Loads of IIO driver updates and additions
- binder driver updates (more on that below...)
- Removal of the SGI XP and GRU drivers as they are not used anymore
and turn out to be pretty insecure overall
- Removal of the obsolete ibmasm driver as it's not being used
anymore
- Coresight driver updates and additions
- Mei driver udpates
- Counter driver updates
- FPGA driver updates
- ICC driver updates
- lots and lots of other tiny driver updates to resolve reported
issues
All of these have been in linux-next for a while"
* tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (513 commits)
iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF
iio: adc: pac1921: fix wrong channel used in trigger handler read
iio: light: gp2ap002: re-enable irq if runtime suspend fails
iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
iio: light: apds9306: fix PM reference leak in apds9306_read_data()
iio: gyro: mpu3050: fix sign of raw angular velocity readings
iio: srf04: fix pm_runtime handling on probe error path
iio: adc: ad4080: configure backend data size
iio: adc: adi-axi-adc: add data size support for AD408X backend
iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable
iio: dac: ad5446: fix OF module device table
iio: light: opt4001: Fix reversed GENMASK() arguments in fault count mask
iio: light: opt4001: Reject integration times with a non-zero seconds part
iio: light: opt4001: Fix incompatible pointer type passed to div_u64_rem()
iio: light: opt4001: Fix power down clearing bits of the wrong register
iio: light: opt4060: Fix incorrect register name in threshold read error message
iio: light: opt4060: Fix pointer type passed to div_u64_rem()
iio: light: opt4060: Reject integration times with a non-zero seconds part
iio: light: ltrf216a: fix runtime PM reference leak in error path
iio: pressure: dps310: fix NULL pointer dereference on ACPI probe
...
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fastrpc_ioctl_alloc_dmabuf() calls dma_buf_fd() which installs the fd
into the caller's fd table before copy_to_user() copies the fd number
back to userspace. If copy_to_user() fails, the fd is already visible
to other threads in the same process but the ioctl returns -EFAULT.
The existing comment in the code even acknowledges the problem:
"The usercopy failed, but we can't do much about it, as dma_buf_fd()
already called fd_install()..."
Now that dma_buf_fd_install() is available (introduced to fix the same
issue in dma-heap), apply the same pattern here: reserve the fd with
get_unused_fd_flags(), attempt copy_to_user(), and only on success call
dma_buf_fd_install() to publish it atomically with the tracepoint. On
copy_to_user() failure, put_unused_fd() and dma_buf_put() cleanly
unwind without any user-visible side effects.
Fixes: 6cffd79504ce ("misc: fastrpc: Add support for dmabuf exporter")
Cc: stable@vger.kernel.org
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Baineng Shou <shoubaineng@gmail.com>
Link: https://lore.kernel.org/r/20260817050457.1005285-3-shoubaineng@gmail.com
Signed-off-by: Christian König <christian.koenig@amd.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI updates from Bjorn Helgaas:
"Resource management:
- Add hotplug reservation only once (not at each level of the
hierarchy) so bridge windows don't grow more than necessary (Ilpo
Järvinen)
Driver binding:
- Rework device matching so device ID lifetime only needs to cover
the probe path since dynamic IDs can be removed at any time (Gary
Guo)
Error handling:
- Update mappings of AER errors to agent & layer and log them for
each individual error when multiple errors detected (Lukas Wunner)
- Log Error Source only once, not twice in separate messages (Lukas
Wunner)
- Emit TLP Log only for unmasked errors (Lukas Wunner)
- Support Advisory Non-Fatal Errors (Lukas Wunner)
- Allow DPC on all Downstream Ports, not just Root Ports, when OS
controls AER (Darshit Shah)
ASPM:
- Program the same ASPM Control values for every function of
multi-function devices, as recommended by the PCIe spec (Krishna
Chaitanya Chundru)
- Avoid L0s for Realtek RTS525A, where it causes an AER interrupt
storm (Max Lee)
- Avoid ASPM L0s, L1, and L1 PM Substates based on 'aspm-no-l0s',
'aspm-no-l1' [1], and 'aspm-no-l1ss' DT properties (Krishna
Chaitanya Chundru)
Power management:
- Allow D3 for native hotplug-capable Root Ports on non-x86 platforms
(we avoid D3 for these ports on x86 because some old platforms
didn't validate it) (Manivannan Sadhasivam)
- Allow portdrv to claim Ports even if they don't support services
(AER, PME, DPC, hotplug, etc) so it can do power management (Brian
Norris)
Power control:
- Add support for PCIe WAKE# interrupt when described via DT (Krishna
Chaitanya Chundru)
- For the TC9563 PCIe switch:
- Take a reference on the I2C adapter to avoid uninterruptible
hang when unloading an I2C module while in-use (Johan Hovold)
- Update DT binding and driver to restrict Tx Amplitude, DFE and
N_FTS to USP, DSP1 and DSP2 (Manivannan Sadhasivam)
- Power off only external-facing ports (DSP1, DSP2), leaving USP
and DSP3 (aka VDSP) powered up (Manivannan Sadhasivam)
- Move integrated MAC Endpoint out of the list of internal ports
and configure it separately (Manivannan Sadhasivam)
Virtualization:
- Add ACS quirk for Pericom PI7C9X2G608 switches (Tim Harvey)
- Fix a long-standing bug in the Intel PCH Root Port MPC ACS quirk
that didn't update the intended INTEL_MPC_REG_IRBNCE bit because it
used a 16-bit config write when a 32-bit write was intended
(Mohamad Raizudeen)
Procfs:
- Avoid spurious runtime PM wakeup on config space accesses that are
outside config space and fail before reaching PCI (Krzysztof
Wilczyński)
- Warn on user-space writes to kernel-exclusive config space regions,
as we already do for sysfs (Krzysztof Wilczyński)
- Check credentials of opener, not reader, for config space reads, as
we already do for sysfs (Krzysztof Wilczyński)
Sysfs:
- In pci_write_legacy_io(), avoid out-of-bounds reads from the user
buffer and fix incorrect ioport write data (1-byte writes on
little-endian powerpc, 2- and 4-byte writes on big-endian powerpc)
(Krzysztof Wilczyński)
- In pci_read_legacy_io(), fix incorrect ioport read data for 2- and
4-byte reads on big-endian powerpc (Krzysztof Wilczyński)
- Fix I/O port accessor argument order in Alpha pci_legacy_write()
(Krzysztof Wilczyński)
- Avoid spurious runtime PM wakeup on config space accesses that are
outside config space and fail before reaching PCI (Krzysztof
Wilczyński)
- Return -EINVAL, not -ENODEV, for mmap of I/O BAR that fails because
the arch doesn't support it, as we do for procfs (Krzysztof
Wilczyński)
- Check for LOCKDOWN_PCI_ACCESS for legacy_io and legacy_mem, as we
do for other config space accessors (Krzysztof Wilczyński)
Peer-to-peer DMA:
- Add Nvidia Vera Rubin to list of platforms that support P2PDMA
(Leon Romanovsky)
Endpoint framework:
- Check doorbell SUCCESS bit in pci_endpoint_test to avoid treating
some failures as successes (Niklas Cassel)
- Fail doorbell test when the trigger IRQ is missed (Niklas Cassel)
New native PCIe controller drivers:
- Add DT binding and driver for NVIDIA Tegra264 (Thierry Reding)
Native PCIe controllers:
- Use common wait time definitions for PCIe link monitoring instead
of defining driver-private duplicates (Thierry Reding)
Generic host bridge driver:
- Fix NULL pointer dereference that caused enumeration failures on
32-bit CAM systems (Steffen Persvold)
Amlogic Meson PCIe controller driver:
- Correct the PERST# GPIO state so it remains asserted until power
and REFCLK become stable to fix enumeration failure (Ronald
Claveau)
ASPEED PCIe controller driver:
- Switch to irq_domain_create_linear() so we can obsolete
irq_domain_add_linear() (Jiri Slaby)
Cadence PCIe controller driver:
- Add MODULE_DEVICE_TABLE to generate module aliases for OF-based
module autoloading (Pengpeng Hou)
- Add debugfs 'ltssm_status' file for LGA- and HPA-based Cadence
controllers (Hans Zhang)
- Support up to x4 (not x2) lanes for J200 (Takuma Fujiwara)
- Fix host/endpoint dependencies for cadence-plat driver to fix link
error when cadence-plat is built-in but the host or endpoint driver
is modular (Aksh Garg)
Freescale i.MX6 PCIe controller driver:
- Add imx6 intr/aer/pme interrupt lines for i.MX95 (Richard Zhu)
- Remove PERST# checking from pci_host_common_parse_port() so callers
can decide whether to fall back to legacy DT binding with PERST# in
the host bridge (Sherry Sun)
- Fix build issues when PCI_PWRCTRL_GENERIC or PCI_HOST_COMMON is a
module (Arnd Bergmann)
- Create pwrctrl devices only once by doing it from imx_pcie_probe()
instead of imx_pcie_host_init(), which is used during both probe
and resume (Sherry Sun)
- Use 'dw_pcie_rp->skip_pwrctrl_off' to avoid powering off devices
during suspend to preserve wakeup capability (Sherry Sun)
- Add runtime PM support for i.MX95 to allow dynamic power management
when the link is idle (Richard Zhu)
Intel VMD host bridge driver:
- Support device ID 0x28C1 and assume that BIOS has already
enumerated the hierarchy below VMD and stored bus range info for OS
to use (Nirmal Patel)
- Add support for VMCONFIG BUS_RESTRICT_CFG=3, which makes it
possible to enumerate downstream devices on Intel Arrow Lake-HX
systems and probably others (Ali Alaei)
- Pay attention to _OSC negotiation for VMD hierarchy only when
running on bare metal, not when running in a VM (Nirmal Patel)
- Add Nova Lake (NVL) and Dunlow (DNL) Device IDs (Szymon Durawa)
MediaTek PCIe controller driver:
- Add support for PCIe controller in EcoNet EN7528 and EN751221 SoCs
(Caleb James DeLisle)
MediaTek PCIe Gen3 controller driver:
- Add mediatek-gen3 'memory-region' for restricted DMA buffer
(Chen-Yu Tsai)
NVIDIA Tegra264 PCIe controller driver:
- Distinguish Tegra264 C0 PCIe controller for internal GPU from C1-C5
controllers so the unit address matches the first 'reg' entry
(Thierry Reding)
- Add Tegra264 Root Port stanzas to prepare for generic WAKE#
handling (Thierry Reding)
Qualcomm PCIe controller driver:
- Add IPQ9650 compatible with global interrupt (Kathiravan
Thirumoorthy)
- Add IPQ5210 compatible with IPQ9574 fallback (Varadarajan
Narayanan)
- Add DT binding and driver support for Hawi SoC (Matthew Leung)
- Skip PERST# GPIOs provided by downstream PCIe devices, which should
be handled by drivers of those devices (Manivannan Sadhasivam)
- Stop advertising Attention Button Present (no Qcom SoCs support
Attention Buttons) so pciehp can use Presence Detect Changed events
(Qiang Yu)
Renesas R-Car PCIe controller driver:
- Add rcar-gen4-pci-host optional 'msi-parent' for GIT ITS (Marek
Vasut)
- When MSI is enabled but iMSI-RX is not used, configure AXIINTC to
allow GIT ITS to handle MSI (Marek Vasut)
- Refactor GIC600 implementation to make it easier to add platforms
that only support 32-bit addressing (Marek Vasut)
- Add Renesas R-Car Gen4 S4/V4H/V4M to the list of GIC600
integrations that only support 32-bit addressing (Marek Vasut)
Renesas RZ/G3S PCIe controller driver:
- Add DT binding and driver support for RZ/V2H(P) SoC, which contains
two PCIe controllers, configured either as a single x4 link or two
independent x2 link controllers (Lad Prabhakar)
SpacemiT K1 PCIe controller driver:
- Add missing MODULE_DEVICE_TABLE() to generate module alias info for
OF-based module autoloading (Pengpeng Hou)
StarFive PCIe controller driver:
- Fix resource leaks on error paths in host_init() (Ali Tariq)
- Fix runtime PM handling and teardown ordering to avoid register
access while power or clocks are disabled (Ali Tariq)
- Check for runtime PM resume failure to avoid register access while
power or clocks are disabled (Ali Tariq)
Synopsys DesignWare PCIe controller driver:
- Add LECARC PMU IDs to the DWC RAS/DES VSEC list so it can take
advantage of the existing debugfs support for silicon debug, error
injection, and event counters (Brett Zhou)
- Factor pcie_valid_speed() and pci_bus_speed2lnkctl2() out of bwctrl
so they can be shared by the DWC core (Hans Zhang)
- Flush MSI writes from endpoint before unmapping the iATU, as we
already do for MSI-X writes (Niklas Cassel)
- Unmap MSI iATU window before mapping MSI-X window, to avoid a
subsequent MSI write using a disabled aperture and losing the
interrupt (Niklas Cassel)
- Change endpoint .pre_init() and .init() callbacks to return errors
and handle them (Marek Vasut)
UltraRISC PCIe controller driver:
- Add 'core', 'dbi', and 'aux' clocks to DT binding and manage them
in the driver (Jia Wang)
- Use module_platform_driver() since this may be built as a module,
though not removable because IRQs can't be safely disposed (Jia
Wang)
MicroSemi Switchtec management driver:
- Add Microchip PCI1008 device ID and include it in NTB DMA alias
quirk (Logan Gunthorpe)
Miscellaneous:
- Document how to write PCI Host Controller drivers (Manivannan
Sadhasivam)
- Fix typos in documentation (D'Orus Tsitera)
- Use %pe format specifier to print error pointers so we get symbolic
errname when available (Krzysztof Wilczyński)"
* tag 'pci-v7.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (124 commits)
PCI: vmd: Add Nova Lake (NVL) and Dunlow (DNL) Device IDs
PCI: tegra264: Add Tegra264 support
dt-bindings: PCI: tegra264: Switch to PCIe Root Port bindings
dt-bindings: PCI: tegra264: Strictly distinguish C0 from C1-C5
PCI/AER: Support Advisory Non-Fatal Errors
PCI: Fix 32-bit config write in Intel PCH Root Port MPC ACS quirk
PCI: dwc: Handle return value from endpoint .pre_init callback
PCI: dwc: Handle return value from endpoint .init callback
PCI: dwc: Add PCI ID for LECARC PCIe PMU
PCI/ASPM: Mask ASPM states based on Devicetree properties
PCI/ASPM: Disable/restore ASPM on every function for multi-function devices
Documentation: PCI: Document how to write PCI Host Controller drivers
PCI/ASPM: Use pcie_capability_clear_and_set_word() for ASPM disable/restore
PCI: Add support for PCIe WAKE# interrupt
PCI: Allow D3 for native hotplug-capable Root Ports on non-x86 platforms
dt-bindings: PCI: Correct white-space style
PCI/ASPM: Avoid L0s for Realtek RTS525A
PCI: ultrarisc: Use module_platform_driver()
PCI: ultrarisc: Get and enable DP1000 PCIe controller clocks
dt-bindings: PCI: ultrarisc: Add required DP1000 PCIe clocks
...
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* pci/controller/root-port-reset:
misc: pci_endpoint_test: Add AER error handlers
PCI: dw-rockchip: Implement .reset_root_port() and use for link down
PCI: qcom: Implement .reset_root_port() and use for link down
PCI: host-common: Add link down handling for Root Ports
PCI/ERR: Add support for resetting the Root Ports in a platform-specific way
PCI: dwc: ep: Clear MSI iATU mapping in dw_pcie_ep_cleanup()
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Pull MMC updates from Ulf Hansson:
"MMC core:
- Reject invalid perdev_minors for the block device before division
- Document DT fixed-layout NVMEM provider support for eMMC cards
MMC host:
- Convert a couple of plain text DT bindings to the yaml format
- bcm2835: DMA mapping improvements
- cqhci: Fix sparse warnings for endian conversions
- dw_mmc: Stop and complete DMA also in busy state
- dw_mmc-rockchip: Add support for the RV1106 variant
- litex_mmc: Add dynamic bus width support
- moxart: Propagate error for DMA completion timeout
- pxamci: Remove PXA remnants for the PXA93x support
- rtsx_usb_sdmmc: Avoid USB I/O in runtime autosuspend
- rtsx_usb_sdmmc: Suppress false CD after init timeout
- sdhci_am654: Add Judith Mendez as maintainer
- sdhci-esdhc-mcf: Do not use readl()/writel() on ColdFire
- sdhci-msm: Extend the DT bindings for ICE
- sdhci-tegra: Add support for Tegra264/Tegra238 variants
- sunxi: Add support for the Allwinner A733 variant
- via-sdmmc: Clean up card detect work at remove and in probe error path"
* tag 'mmc-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (35 commits)
ARM: PXA: Fix build error for PXA93x
dt-bindings: mmc: sunxi: add compatible string for Allwinner A733 MMC0/1/2
dt-bindings: mmc: Document fixed-layout NVMEM provider support
mmc: sdhci-tegra: Add Tegra264 SoC data
dt-bindings: mmc: tegra: Document Tegra264 SDHCI
mmc: sdhci-tegra: Add Tegra238 SoC data
dt-bindings: mmc: tegra: Document Tegra238 SDHCI
mmc: omap_hsmmc: use platform_get_irq_optional for wake IRQ
mmc: via-sdmmc: cancel card-detect work on remove
mmc: via-sdmmc: stop card-detect handling on probe failure
mmc: moxart: use platform helpers for resource and IRQ
mmc: host: Remove redundant dev_err()/dev_err_probe()
mmc: bcm2835: DMA mapping improvements
mmc: dw_mmc: move declaration of dw_mci_pmops
dt-bindings: mmc: rockchip-dw-mshc: Add RV1106 compatible
mmc: rtsx_usb_sdmmc: suppress false CD after init timeout
misc: rtsx_usb: avoid USB I/O in runtime autosuspend
mmc: sdhci-of-dwcmshc: Log eMMC reset calls
mmc: block: reject invalid perdev_minors before division
mmc: sdhci-of-ma35d1: add missing MODULE_DEVICE_TABLE()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "mm: drop "sub" prefix from various places" (Dev Jain)
page->folio conversion and a naming cleanup
- "mm/kasan: remove redundant initialization for kasan_flag_write_only"
(Igor Putko)
KASAN cleanup work
- "mm/filemap: reduce unnecessary xarray lookups" (Chi Zhiling)
Small speedup in the pagecaache read code
- "mm/percpu: Fix possible NOFS/NOIO reclaim recursion" (Kaitao Cheng)
Improve the vmalloc code - mainly the avoidance of GFP_KERNEL
allocations when the caller asked for GFP_NOFS or GFP_NOIO
- "mm/kmemleak: avoid soft lockup when scanning task stacks" (Breno
Leitao)
Avoid a soft lockup watchdog trigger from the kmemleak scanning code
in extreme situations
- "mm/page_owner: misc cleanups" (Ye Liu)
Cleanups to the page_owner code. For some reason lots of people have
been working on the page_owner code this cycle.
- "mm: convert to walk_page_range_vma() to eliminate find_vma()"
(Kefeng Wang)
Simplify and accelerate the page walking library function
- "mm/migrate: preparatory cleanups for batch copy and offload"
(Shivank Garg)
Cleanups in the migration code
- "mm/page_owner: add per-fd filter infrastructure for print_mode and
NUMA filtering" (Zhen Ni)
Per-fd filtering to page_owner in order to reduce the sometimes vast
amount of output it can produce
- "mm: Refactor bootmem gigantic hugepage allocation" (Muchun Song)
Fixes and preparatory cleanups around bootmem HugeTLB handling,
sparse initialization ordering, and related vmemmap setup
- "mm/zsmalloc: reduce lock contention in zs_free()" (Wenchao Hao)
Reduce lock contention in zs_free(), which dominates the unmap path
under memory pressure on Android (LMK kills) and on x86 servers
running zswap-heavy workloads.
Up to 1.83x improvement in microbenchmarking.
- "move alloc_tag.c file under mm/" (Suren Baghdasaryan)
- "samples/damon: handle damon_{start,stop}() failures" (SJ Park)
Fix improper handling of damon_start(), damon_stop(), and
damon_call() failures across DAMON sample modules to prevent
potential memory leaks, operation disruptions and use-after-free
bugs
- "mm/damon/sysfs: kobject_del() directories that users can
create/remove" (SJ Park)
Fix delayed sysfs directory removal under DEBUG_KOBJECT_RELEASE
causeing creation failures due to duplicate directory names by adding
missing kobject_del() calls before creating new directories
- "mm: cleanup clear_not_present_full_ptes()" (David Hildenbrand)
Clean up the core pte handling code
- "selftests/damon: misc fixes for test bugs" (Kunwu Chan)
Fix several bugs in the DAMON selftests
- "selftests/damon: fix memcg_path staging handling" (Cheng Nie)
Fix a bug in _damon_sysfs.py for damos_filter memcg_path setup, and
add a test case for it in sysfs.py.
- "selftests/damon: test kdamond refresh_ms" (Ruslan Valiyev)
Selftest coverage for DAMON's refresh_ms sysfs feature by updating
the test control module and verifying that scheme stats update
automatically without manual intervention
- "mm/damon: five misc fixups" (Akinobu Mita)
Miscellaneous DAMON fixups.
- "mm/damon/core: detect internal variation above max_nr_regions/2"
(Jiayuan Chen)
Fix DAMON's region splitting behavior when region counts exceed half
the maximum budget by dynamically scaling down the split fraction as
the limit approaches, preventing large regions from staying un-split,
and add corresponding KUnit test coverage
- "mm: preparatory patches for PMD level swap entries" (Usama Arif)
Refactor and clean up PMD softleaf helpers, call sites, and
architecture flags to lay the groundwork for a follow-up series that
introduces PMD page table swap entries
- "mm/damon: update, optimize, and clean up doc, tests, and code" (SJ
Park)
Update DAMON design and ABI documentation, expands unit and selftest
coverage, optimize damon_commit_target_regions(), and clean up
recently added sysfs interface code for better readability
- "mm/vmpressure: reduce CPU, memory and code overhead on cgroup v2"
(Usama Arif)
Optimize vmpressure() by skipping unnecessary work on cgroup v2 for
userspace event notifications and refactor v1-only eventfd handling
into mm/memcontrol-v1.c to reduce memory overhead and code complexity
- "selftests/mm: refactor pkey helpers and fix mmap error handling"
(Hongfu Li)
Refactor pkeys shared tracing and assertion helpers into a common
file, unify protection key selftests to use consistent diagnostic
logging and assertions, and enforce standardized MAP_FAILED return
checks for mmap() calls across the tests
- "mm/damon: optimize out nr_accesses_bp" (SJ Park)
Replace the error-prone, continuously updated nr_accesses_bp field in
damon_region with an on-demand moving sum function, reducing
structure memory overhead and avoiding state corruption bugs
- "Open HugeTLB allocation routine for more generic use" (Ackerley Tng)
Decouple HugeTLB folio allocation from VMA dependencies by
introducing hugetlb_alloc_folio(), enabling subsystems like
guest_memfd to allocate HugeTLB folios without standard VMA
reservations or pseudo-VMAs
- "mm/damon: provide pseudo moving sum probe_hits" (SJ Park)
Integrate DAMON's probe_hits attribute counter into the pseudo moving
sum infrastructure, enabling real-time, online monitoring without
waiting for full aggregation intervals
- "mm: Some cleanups for page allocator APIs" (Brendan Jackman)
Simplify and refactor the page allocator entry points and flags by
unifying allocation paths, adding internal alloc_flags arguments, and
eliminating redundant __ prefixed alloc_pages variants.
- "Fix incorrect access of hugetlb pte entries" (Dev Jain)
Enforce the consistent use of huge_ptep_get() instead of ptep_get()
for HugeTLB entries and fixes an unaligned address issue in arm64's
huge_ptep_get() implementation
- "mm/damon: validate all parameters in the core" (SJ Park)
Consolidate parameter validation into the DAMON core specifically
within damon_start() and damon_commit_ctx() to centralize error
checking, eliminate caller-side redundant checks and to improve
maintenance efficiency
- "tools/mm/page_owner_sort: fix filtering and cleanup issues" (Yichong
Chen)
Rename is_need() to filter_record() for clearer return semantics, fix
per-record allocation memory leaks and bound output copies in
search_pattern() to address an existing buffer issue
- "memcg: bail out reclaim when memcg is dying" (Jiayuan Chen)
Mitigate a system-wide stall which occurs when a cgroup is removed
while one of its memory control files is doing synchronous reclaim
- "mm/memory-failure: add panic option for unrecoverable pages" (Breno
Leitao)
Introduce an opt-in vm.panic_on_unrecoverable_memory_failure sysctl
that immediately panics the kernel on unrecoverable memory errors in
kernel-owned pages to preserve error context and prevent delayed,
silent data corruption
- "mm/damon: refactor damon_{start,stop,commit}() for simple error
handling" (SJ Park)
Refactor the DAMON core API functions to guarantee that all contexts
are fully stopped when damon_start(), damon_stop(), or damon_commit()
fail, eliminating the need for complex and error-prone caller-side
cleanup code
- "Keep tail page private zero at free and folio split" (Zi Yan)
Add checks to ensure tail_page->private is zero when freeing compound
or high-order pages and when promoting tail pages during large folio
splits. By validating these fields at free and split time, it allows
the removal of redundant private field clearing inside
prep_compound_tail()
- "mm: drop redundant lru_add_drain in anon folio reuse paths" (Barry
Song)
Eliminate redundant lru_add_drain() calls in
wp_can_reuse_anon_folio() and do_swap_page() to reduce LRU lock
contention and system overhead
By validating folio refcounts against the LRU cache before draining
and removing unnecessary drains in the swap path, it achieves up to a
30.5% reduction in drain calls during heavy swap workloads
- "mm: clean up folio LRU and swap declarations" (Jianyue Wu)
Reorganize folio LRU and swap code by relocating page-cluster state
to mm/swap_state.c, renaming mm/swap.c to mm/folio.c, and moving
MM-internal reclaim declarations into mm/internal.h.
- "userfaultfd: working set tracking for VM guest memory" (Kiryl
Shutsemau)
Add userfaultfd support for tracking the working set of VM guest
memory, so a VMM can identify hot pages and reclaim cold ones to
tiered or remote storage
- "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 2)" (David
Hildenbrand)
Remove the remaining pieces of CONFIG_HAVE_BOOTMEM_INFO_NODE,
performing some smaller cleanups around freeing of reserved vmemmap
pages on the way.
- "mm/damon: update probe hits for runtime parameter commits" (SJ Park)
Ensure that DAMON's probe_hits attribute counter is properly updated
when monitoring intervals are changed at runtime, matching the
behavior of nr_accesses. To achieve this, it refactors and renames
existing helper functions for shared use, applies the updates to
probe_hits, and handles edge cases in damon_probe_hits_mvsum() to
maintain measurement accuracy.
- "KSM: performance optimizations for rmap_walk_ksm" (xu xin)
Resolve a severe KSM reverse-mapping performance bottleneck where
thousands of split VMAs sharing a single anon_vma cause extended lock
contention.
By adding an interval-filtering check during the rmap walk, it
reduces worst-case anon_vma lock hold times from over 500ms down to
under 2ms, preventing application freezes and latency spikes under
memory pressure.
- "mm: split a couple of headers from internal.h" (Mike Rapoport)
Split declarations related to mm_init, memblock, vmalloc and sparse
into new headers
- "KSM: use linear_page_index in collect_procs_ksm()" (xu xin)
Apply the interval tree optimization from rmap_walk_ksm() to
collect_procs_ksm() to avoid iterating over non-matching VMAs during
KSM memory error handling.
It hoists loop-invariant address initialization and restricts the
anon_vma_interval_tree_foreach walk to a targeted page offset range,
reducing redundant checks and improving lookup efficiency.
- "selftests/mm: avoid false failures in hugetlb and KSM tests" (Sayali
Patil)
Fix issues in the hugetlb and KSM MM selftest categories that can
report failures when the prerequisites for the tests are not
satisfied
- "mm/damon: introduce data attributes only monitoring" (SJ Park)
Introduce attribute-weighted region management in DAMON, allowing
users to prioritize specific data attributes (such as page sizes or
cgroups) over or instead of access monitoring.
By assigning weights to attribute probes, DAMON can completely
disable access tracking and adjust monitoring regions based on
weighted probe-hit counters to optimize monitoring quality for
attribute-focused workloads.
- "mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings"
(Stanislav Kinsburskii)
Extend hmm_range_fault() to support userfaultfd-backed regions by
allowing the mmap lock to be dropped during fault handling via a new
hmm_range_fault_locked() helper.
By accepting a locked pointer and signaling retry status when lock
release occurs, it enables page fault resolution in userfaultfd
regions while preserving backward compatibility for existing callers.
- "mm: make VMA page offset handling more consistent" (Lorenzo Stoakes)
Clean up and standardize how vma->vm_pgoff is accessed and
manipulated across file-backed and anonymous mappings in the kernel
It introduces dedicated helper functions such as vma_start_pgoff(),
vma_end_pgoff(), vma_set_pgoff() and linear_page_delta() while
renaming rmap interval tree helpers to better reflect their
functionality.
These changes establish a cleaner foundation for future work that
will unify virtual page offset indexing for all anonymous and CoW'd
folios.
- "mm: handle device-private PMDs in walk callbacks" (Usama Arif)
Address kernel panics and state corruption caused by MM walk
callbacks reaching non-present device-private PMD swap entries
created during HMM migrations
It ensures that functions which acquire pmd_trans_huge_lock()
properly recognize device-private PMDs instead of assuming a present
THP or a standard migration entry.
- "mm/rmap: Refactor try_to_unmap_one" (Dev Jain)
Refactor try_to_unmap_one by modularizing Hugetlb,
anonymous-lazyfree, and anonymous-swapbacked logic into dedicated
functions, laying the structural groundwork for batched anonymous
large folio unmapping.
- "Docs/ABI/damon: sysfs ABI document fixes and additions" (Song Hu)
Fix typos and fills in missing entries in the DAMON sysfs ABI
document
- "dax/kmem: atomic whole-device hotplug via sysfs" (Gregory Price)
Introduce an atomic sysfs state attribute and supporting DAX/MM
infrastructure to prevent userland races when offlining and removing
entire memory regions
By adding an unplugged state alongside standard online modes, it
enables whole-device atomic hotplug control while preserving backward
compatibility.
- "mm: convert more vm_flags_t users to vma_flags_t" (Lorenzo Stoakes)
Continue transitioning the kernel from the deprecated vm_flags_t type
to vma_flags_t across core memory management infrastructure.
It replaces legacy type usage in core functions such as do_mmap(),
unmapped area allocation, mm->def_vma_flags, and VMA operations like
mlock, mprotect, and mremap.
- "Two small patches to clean up mm/mm_slot.h" (xu xin)
Refactor mm_slot.h by introducing mm_slot_remove() to unify duplicate
slot deletion sequences in khugepaged and KSM. It also adds code
documentation explaining why mm_slot_lookup and mm_slot_insert must
remain as preprocessor macros rather than static inline functions.
- "mm/damon/core: hide core-private struct fields" (SJ Park)
Clean up DAMON core structures by consistently marking internal-only
fields with private: comment tags to prevent improper direct access
from outer layers.
It enforces encapsulation across core structures including
damon_region, damon_target, and damon_ctx and updates DAMON_SYSFS to
interact through approved access APIs instead of exposing raw struct
members.
- "mm/damon: unurgent fixes for infinite loop, NULL de-ref and races"
(SJ Park)
Address potential infinite loops, NULL dereferences, and race
conditions identified in DAMON
It fixes an infinite loop triggered by extreme user configurations, a
NULL pointer dereference within unit tests and minor monitoring
accuracy degradation caused by subtle runtime races.
- "mm/page_alloc: fixes for free_pages_nolock() on RT/UP" (Brendan
Jackman)
Fix an NMI safety flaw in __free_frozen_pages() where freeing pages
on non-SMP or PREEMPT_RT kernels can bypass can_spin_trylock() checks
via non-PCP or isolated migration paths.
It also resolves potential kernel crashes and privilege escalation
risks triggered when BPF tracing runs in NMI context alongside memory
hotplug or large allocation frees.
- "mm/page_alloc: couple of followups for recent cleanups" (Brendan
Jackman)
Clean up and update page allocator nomenclature, documentation, and
debug assertions.
It aligns internal FPI_ flags with the public "nolock" naming
convention, removes outdated internal implementation details from
high-level page allocator comments, and eliminates obsolete
VM_BUG_ON() assertions in allocation paths.
- "mm/mseal: further cleanups" (Lorenzo Stoakes)
Refactor and simplify the mseal implementation by clarifying API
boundaries and removing unnecessary code complexity.
It replaces generic do_mseal() usage outside the syscall with a
dedicated mseal_mmap_page_zero() helper for MMAP_PAGE_ZERO,
eliminates mm_struct parameters to enforce that sealing applies only
to current->mm, and streamlines overall logic and comments with no
functional changes intended.
- "mm/vmscan: fix swappiness=max and clean up per-node proactive
reclaim" (Ridong Chen)
Resolve reclaim behavior bugs and clean up function parameters across
memory reclaim paths
It fixes swappiness=max in both standard reclaim and MGLRU so
unswappable anonymous memory no longer falls back to evicting page
cache, ensures reclaim_store() returns accurate error codes instead
of collapsing all failures into -EAGAIN, and removes the obsolete
gfp_mask parameter from __node_reclaim().
- "mm: mincore: misc cleanups" (Kefeng Wang)
Clean up and simplifies the mincore code. Most importantly, it
removes the historical special behavior that always reports VM_PFNMAP
pages as non-resident.
- "mm/huge_memory: drop dead split helper variants" (Kiryl Shutsemau)
Two trivial cleanups in the folio split API
- "mm/damon: fix uninitialized DAMOS field and kunit exec expectation
bugs" (SJ Park)
Resolve minor operational and testing bugs in DAMON identified by
Sashiko. It initializes the damos->last_applied field to prevent
occasional efficiency degradation and fixes invalid memory accesses
in DAMON KUnit tests during test failure handling.
- "cleanup for stable_page_flags()" (Jinjiang Tu)
Clean up and refactor stable_page_flags() used by /proc/kpageflags
without altering functionality.
It uses BIT_ULL() to prevent shift-overflow warnings on 64-bit flag
bits, converts folio-specific flag checks to standard folio_test_*()
helpers, and removes redundant CONFIG_PAGE_IDLE_FLAG handling.
- "Batch unmap of uffd-wp file folios" (Dev Jain)
Extend batched folio unmapping support to file folios within
userfaultfd write-protect (uffd-wp) VMAs by adding batching
capabilities to pte_install_uffd_wp_if_needed().
This removes special-case restrictions on uffd-wp VMAs in
try_to_unmap_one(), significantly simplifying the function's control
flow and complexity.
- "mm/early_ioremap: clarify and clean up early_ioremap_reset()"
(Sang-Heon Jeon)
Clarify and clean up the architecture-specific usage of
__late_set_fixmap() and __late_clear_fixmap() after
early_ioremap_reset()
It adds explicit documentation regarding when early_ioremap_reset()
must be called and removes redundant macro definitions and reset
calls in the RISC-V and ARM64 architectures.
- "mm: fix reclaim storms in defrag_mode" (Johannes Weiner)
Address severe performance regressions, swap storms, and spurious
OOMs caused by vm.defrag_mode=1 under high memory pressure in Meta
production
It updates the page allocator slowpath so non-movable allocation
requests actively trigger direct reclaim and direct compaction at
pageblock_order scale, allowing them to claim whole pageblocks rather
than spinning unproductively.
- "zram: lockmap tweaks" (Sebastian Siewior)
Optimize and fix lockdep tracking for zram devices by consolidating
per-entry lockmaps and isolate lock classes across multiple instances
This reduces memory overhead by replacing per-entry lockdep_map
instances with a single map per struct zram, and assigns a dynamic
lock_class_key to each instance to prevent false deadlock reports
when different zram devices are backed by distinct filesystems.
* tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (501 commits)
selftests/mm: thuge-gen: fix test_shmget() for PAGE_SIZE check
selftests/mm: unpoison pages in memory-failure teardown
mm/shmem: downgrade final i_blocks check in shmem_evict_inode() to pr_warn()
mm/khugepaged: replace mutex_lock/mutex_unlock usage with guard macro
mm/zsmalloc: fix release order of locks in zs_page_migrate()
Documentation: zram: remove sections numbering
ksm: stop iterating VMAs when ksm_test_exit returns true
mm: fold userfaultfd_rwp() to false without CONFIG_ARCH_HAS_PTE_PROTNONE
mm/migrate: report RCU-tasks quiescent states in migrate_pages_batch()
zram: use a custom key for each zram object
zram: move lockmap to be per-zram instead per table
selftests/mm: fix gup_longterm EINVAL error message
mm: page_alloc: fix non-movable reclaim storm in defrag_mode
mm: page_alloc: move capture_control to the page allocator
mm: compaction: support non-movable compaction for pageblock requests
mm: page_alloc: __GFP_FS lockdep annotation for direct compaction
hugetlb: evaluate subpool free state while locked
mm/damon: remove trailing semicolons after function definitions
mm/damon/ops-common: prevent migration fallback to non-target nodes
mm/damon: update outdated comment about DAMOS filter handling
...
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Due to security concerns, remove the SGI GRU driver, which cannot be used
on anything newer than the long time unsupported UV2 platform.
Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
Acked-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Acked-By: Robin Holt <robinmholt@gmail.com>
Acked-by: Steve Wahl <steve.wahl@hpe.com>
Link: https://patch.msgid.link/amyzGw1-MVLpNH-d@hpe.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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