Merge tag 'iommu-updates-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux
Pull IOMMU updates from Joerg Roedel:
"Core:
- Detect scatterlist length overflows and finalize deferred domain
attachments before mapping MSI pages
- Consolidate x86 MSI reserved-region handling and clean up internal
DMA and SVA helpers
AMD IOMMU:
- Add IOMMU PerfOpt support, enabled by amdgpu for supported
integrated GPUs in identity domains
- Restrict forced identity mapping to GPUs that require it
- Fix kdump device-table allocation and reuse, ATS configuration
error handling, and an interrupt-remapping allocation leak
- Clean up device probing and initialization
- Add Vasant Hegde as an AMD IOMMU maintainer
ARM SMMUv2:
[66 lines not shown]
Merge tag 'dma-mapping-7.4-2026-10-21' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
Pull dma-mapping updates from Marek Szyprowski:
- several SWIOTLB initialization cleanups (Aneesh Kumar K.V, Francesco
Valla)
- exact page allocation for DMA pages (Qingfang Deng)
- tools/dma build fixes (Sasha Levin)
- minor fixes for various corner cases (Marek Szyprowski, Leon
Romanovsky) and code cleanup (John Garry)
* tag 'dma-mapping-7.4-2026-10-21' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
dma-debug: Skip cacheline tracking for MMIO mappings
tools/dma: fix building from the top level with O=
tools/dma: fix building with O=
dma: swiotlb: Track whether the pool size was explicitly set
[7 lines not shown]
Merge tag 'vfio-v7.4-rc1' of https://github.com/awilliam/linux-vfio
Pull VFIO updates from Alex Williamson:
- Fix missing selftest <libgen.h> include for basename() to support
non-glibc builds (Hisam Mehboob)
- Add vfio selftest documentation covering the libvfio helper library
and guidance for developers to aid in adding and understanding the
framework (David Matlack)
- Fix vfio cdev open path to prevent a second open from clobbering the
vf_token or clearing the KVM reference. Add a selftest to avoid
future recurrences (Alex Williamson)
- Extend vfio selftest mix_and_match timeouts, in particular to account
for systems where generated faults can induce heavy SMM load,
delaying internal timeouts. Also extend timeout for execution via
runner to account for various tests exceeding default 45s timeout
[66 lines not shown]
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost,virtio updates from Michael Tsirkin:
"This adds CPR support for vhost.
Plus some fixes, notably for a host of races we had when callback fire
around device reset"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
tools/virtio: add missing device-id/virtio.h wrapper header
vhost/vsock: add VHOST_RESET_OWNER ioctl
vhost: synchronize with RCU readers when freeing workers
vhost/vsock: re-scan TX virtqueue on device start
vhost/vsock: suppress EHOSTUNREACH fast-fail during CPR pause
vhost/vsock: split out vhost_vsock_drop_backends helper
virtio_pci: drop callback sync on reset
virtio_pci_modern: move avq cleanup from reset to del_vqs
virtio: synchronize callbacks after device reset
virtio_vdpa: implement synchronize_cbs()
[5 lines not shown]
powerpc/irq: Fix build with CONFIG_PROC_FS=n
Commit fbb22ceaaf8f ("powerpc/irq: Make irqstats array based") made
arch_show_interrupts() call irq_proc_emit_counts(). That function lives
in kernel/irq/proc.c, which is only built with CONFIG_PROC_FS, so
kernels without procfs no longer link:
powerpc64-linux-ld: arch/powerpc/kernel/irq.o: in function `arch_show_interrupts':
arch/powerpc/kernel/irq.c:134:(.text+0x4b8c): undefined reference to `irq_proc_emit_counts'
arch_show_interrupts() is only called from irq_seq_show(), which is in
kernel/irq/proc.c as well, so build it only with CONFIG_PROC_FS, as x86
already does.
Fixes: fbb22ceaaf8f ("powerpc/irq: Make irqstats array based")
Reported-by: kernel test robot <lkp at intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202609271531.8kf2NTjK-lkp@intel.com/
Signed-off-by: Sasha Levin <sashal at kernel.org>
Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"ARM:
- pKVM state isolation: years after pKVM started being enabled
upstream, we finally get the basics in the form of state isolation.
The vcpu state is now off-limit for the host for protected VMs
- pKVM also grows a hypervisor-private memory allocator, allowing it
to deal with sub-page allocation, much like everywhere else
- pKVM also lands a trace_printk() equivalent, which hopefully will
make debugging a bit easier
- First shot at annotating portions of the KVM/arm64 code to be
extracted and built on s390. The real fun is yet to come
- Allow pre-faulting of stage-2 canonical mappings from userspace,
[301 lines not shown]
Merge tag 'bpf-next-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Pull bpf updates from Alexei Starovoitov:
"Major changes:
- Introduce scalar evolution (SCEV) analysis in the verifier.
It infers how registers and stack slots change in a loop and lets
the verifier check bounded loops with induction variables as ranges
instead of walking every iteration. The number of processed insns
drops ten fold in programs with loops (Eduard Zingerman)
- Add 'callx' instruction: indirect call of a static BPF subprogram.
The address is taken with ld_imm64 or loaded from read-only data.
Supported by x86-64, arm64 and riscv64 JITs (Alexei Starovoitov, Pu
Lehui)
- Add unwind_goto and unwind_exit instructions, so that Rust panic or
[145 lines not shown]
Merge tag 'bootconfig-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull bootconfig updates from Masami Hiramatsu:
"Parser robustness and validation improvements:
- Skip printing early params to cmdline from bootconfig
Suppress early_param keys from /proc/cmdline and warn the user,
since bootconfig does not invoke early_param handlers and silently
ignoring them is misleading
- Reject unexpected data after null character
Detect and reject non-null data following an intermediate null
character in the bootconfig buffer, preventing silently ignored
configuration after an early termination
Code cleanups:
[42 lines not shown]
Merge tag 'probes-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes updates from Masami Hiramatsu:
"Asynchronous optprobe optimizer and cleanups:
- Make optprobe optimizer multi-generational and asynchronous
Rework the optimizer as a state machine to avoid calling
time-consuming synchronize_rcu_tasks() while holding kprobe_mutex,
text_mutex, and cpus_read_lock(). Uses call_rcu_tasks() and a fixed
ring of generation slots instead, so locks are only held during the
brief instruction- patching window
- Use DEFINE_DEBUGFS_ATTRIBUTE for the kprobes enabled knob
Replace a hand-rolled debugfs read/write pair (dating from 2007)
with the proper DEFINE_DEBUGFS_ATTRIBUTE macro, removing dead code
and the stale XXX comment
[50 lines not shown]
Merge tag 'trace-ringbuffer-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull ring-buffer updates from Steven Rostedt:
- Add Vincent Donnefort as ring-buffer maintainer
Vincent has been doing a lot of updates to the ftrace ring buffer
lately. I'm going to start delegating updates for the ring buffer to
him.
- Use RING_BUFFER_MIN_NR_PAGES instead of open coding the number 2
Instead of using the number 2 as the minimum number of pages that a
ring buffer may have, create and use a macro
RING_BUFFER_MIN_NR_PAGES.
- Clean up the resize_disabled_checks
There's duplication of code to check for resize disabled. Create a
[23 lines not shown]
Merge tag 'trace-ftrace-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull ftrace updates from Steven Rostedt:
- Have the stacktrace option work with func-args
The func_stack_trace option has it's own ftrace handler and so does
the func-args option. When they are both set, neither would run. The
function tracer itself would error out.
Allow the stacktrace and function args to work together.
- Avoid BTF lookup in atomic context
The ftrace_dump() can call function graph tracing output from an
atomic context (like an NMI watchdog going off). The BTF lookup is
not safe to call from atomic context. Have btf_find_func_proto()
return if in atomic context.
[55 lines not shown]
Merge tag 'trace-tools-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull RTLA tooling updates from Steven Rostedt:
- Test actions in absence of threshold
Cover the case which regressed in the past in tests.
- More robust CPU count detection
Parse /sys/devices/system/cpu/possible directly instead of going
through libc for CPU count and sanity check against any mismatch with
the number reported by tracefs / osnoise.
- Add option to record IPI count in osnoise top
In addition to counting IRQs, add an option to enable counting IPIs
targetting the measurement CPU to the rtla-osnoise-top tool.
[31 lines not shown]
Merge tag 'trace-rv-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull runtime verifier updates from Steven Rostedt:
- Improve lockdep annotation for reactors
Reactors are not supposed to take locks, so they fit the LD_WAIT_FREE
lockdep class. However, reactors may run in preemptible context and
if the preempting code (tick or simply the scheduler) takes locks, we
see a lockdep splat. Switch to LD_WAIT_SPIN to avoid the splat while
documenting that reactors should still not take locks.
- Add KUnit tests for reactors
Add KUnit test cases to validate registration and reaction, this
requires exporting some symbols and other minor fixes.
- Use the right rv_this variable in the wakeup monitor
[10 lines not shown]
Merge tag 'livepatching-for-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching
Pull livepatching updates from Petr Mladek:
- Update maintainers list: added Joe and Song, removed Jiri
- Prevent removing the livepatch module before releasing all kobjects
- Ignore debug messages from other subsystems in livepatch selftests
* tag 'livepatching-for-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching:
livepatch: Add Joe and Song as maintainers
livepatch: remove myself from MAINTAINERS
selftests/livepatch: filter debug messages in check_result()
livepatch: Fix UAF of unregistered patch kobjects
Merge tag 'slab-for-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mm/slab
Pull slab updates from Harry Yoo:
- Performance improvement of the sheaf prefill API, by allowing the
barn to hold a partial sheaf and refilling sheaves from the barn.
This improves will-it-scale mmap1 throughput by 24% on the maple_node
cache (Hao Li)
- Restore memcg accounting of ipc msg_msg allocations, lost with e.g.
CONFIG_SLAB_BUCKETS=n where the allocations fall back to the general
kmalloc caches (Kees Cook)
- Fix an old race between kmem_cache_destroy() and slab_late_init(),
where a cache destroyed late in the boot process tries to release a
kobject that was never initialized (Imre Kaloz)
- Remove slab_folio(), the last use of struct folio in slab code
(Matthew Wilcox)
[19 lines not shown]
Merge tag 'printk-for-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- John Ogness became PRINTK co-maintainer
- Unregister boot consoles when any proper console is registered at the
end of the boot phase. Before they were removed only when the
so-called preferred console, usually set via the last 'console='
parameter, got registered
- Fix computation for increasing the printk ringbuffer on systems with
many CPUs and possibly long backtraces from all CPUs
- Cleaned up irq_works handling for deferred printk operations
- Use acquire/release semantic for filled_random_ptr_key
- Allow to use ':' in console options
[12 lines not shown]
Merge tag 'sysctl-7.04-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl
Pull sysctl updates from Joel Granados:
- Disallow partial vector updates
Stage sysctl vector writes before updating. Removes the chance of
leaving a sysctl vector partially updated due to erroneous input.
This is not an atomic write; a concurrent reader can still see a
partially updated vector.
- Remove redundant sysctl config guards
Remove locations where (CONFIG_SYSCTL && CONFIG_PROC_FS) was checked.
They are superfluous as CONFIG_SYSCTL now depends directly on
CONFIG_PROC_FS.
- Rewrite selftests using KTAP helpers
[22 lines not shown]
Merge tag 'modules-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux
Pull module updates from Petr Pavlu:
- Ignore local labels and mapping symbols during module load
These symbols were already ignored during kallsyms address-to-symbol
lookups. Filter them out earlier during module loading to reduce
lookup overhead and prevent them from appearing in /proc/kallsyms.
- Fix potentially incorrect access of SetOnce<T> when setting Rust
module parameters.
- Fix a potential read of an uninitialized count when printing taint
information for unloaded modules.
- Allocate the kmod argument array using kmalloc_array() in preparation
for conversion to type-aware allocators.
[33 lines not shown]
Merge tag 'kcsan-20261020-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/melver/linux
Pull KCSAN updates from Marco Elver:
- Avoid division by zero in kcsan_prandom_u32_max()
- test: Do not count report printing time against test duration
* tag 'kcsan-20261020-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/melver/linux:
kcsan: test: Do not count report printing time against test duration
kcsan: Avoid division by zero in kcsan_prandom_u32_max()
Merge tag 'mm-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mm/core
Pull core memory management updates from David Hildenbrand:
"This includes updates to:
- MEMHP (Memory Hotplug)
- GUP (Get User Pages)
The main change is:
- Reduce zone contiguity checking overhead during memory hot(un)plug
(Yuan Liu)
Other changes include smaller fixes along with various cleanups"
* tag 'mm-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mm/core:
mm/memory_hotplug: fix missing rollback in __add_pages()
mm/memory_hotplug: optimize zone contiguous check when changing pfn range
[6 lines not shown]
Merge tag 'mm-stable-2026-10-19-21-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "selftests/mm: improve khugepaged coverage" (Kiryl Shutsemau):
Give khugepaged a proper workout. Extend the tests to all supported
mTHP orders, check exactly which windows collapsed, and make scan
completion deterministic. Race collapse against faults, pinning, fork
and remap; verify that the contents survive.
Add coverage for whole-page-table zaps and memory pressure too.
- "selftests/mm: separate GUP microbenchmarking from functional testing"
(Sarthak Sharma):
Untangle GUP benchmarking from correctness testing. Move the
benchmark into tools/mm, add a standalone harness-based GUP selftest,
and move shared helpers into tools/lib/mm. Give each tool one job
[571 lines not shown]
Merge tag 'net-next-7.4' of 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
[192 lines not shown]
Merge tag 'hardening-v7.4-rc1' of 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)
[32 lines not shown]
Merge tag 'execve-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull execve update Kees Cook:
"Make CIs happier about the execve tests: report the skipped
binfmt_misc_bpf test on stderr (Sasha Levin)"
* tag 'execve-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
selftests/exec: report the skipped binfmt_misc_bpf test on stderr
Merge tag 'seccomp-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull seccomp updates from Kees Cook:
- allow addfd to transfer O_PATH descriptors (Cong Wang)
- allow restarting interrupted unreceived notifications (Cong Wang)
- fix SECCOMP_ADDFD_FLAG_SEND when interrupted (Hui Peng)
- Various docs and test clean-ups
* tag 'seccomp-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
selftests/seccomp: Split fork_and_close into clone and close tests
seccomp: Document RESTART_BEFORE_RECV and O_PATH addfd
selftests/seccomp: test addfd with an O_PATH descriptor
seccomp: allow addfd to transfer O_PATH descriptors
docs/seccomp: describe the SECCOMP_FILTER_FLAG_RESTART_BEFORE_RECV flag
selftests/seccomp: cover restart of unreceived notifications
[2 lines not shown]
Merge tag 'pstore-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore updates from Kees Cook:
- don't leave an ERR_PTR in the ramoops zone pointer (Andrea Parri)
- reject persistent RAM zones too small for the buffer header (Andrea Parri)
- publish big_oops_buf after max_compressed_size (Jaidev Shastri)
* tag 'pstore-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
pstore: publish big_oops_buf after max_compressed_size
pstore: reject persistent RAM zones too small for the buffer header
pstore: don't leave an ERR_PTR in the ramoops zone pointer
Merge tag 'for-linus-fwctl' of git://git.kernel.org/pub/scm/linux/kernel/git/fwctl/fwctl
Pull fwctl update from Jason Gunthorpe:
- One bug fix for a CFI issue in the Rust bindings
* tag 'for-linus-fwctl' of git://git.kernel.org/pub/scm/linux/kernel/git/fwctl/fwctl:
rust: fwctl: declare cfi_encoding for fwctl_rpc_scope
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma updates from Jason Gunthorpe:
"A smaller cycle for features, still mostly AI and tool found bug fixes
for long standing issues:
- Bug fixes and minor cleanups across bnxt_re, cxgb4, EFA, ERDMA,
HFI1, HNS, ionic, iRDMA, mlx4/mlx5, rdmavt, rtrs, RXE, SIW, SRP,
isert and IPoIB. Lots of error unwind leaks, integer overflows, and
use after free during teardown from timers/work that was not
cancelled
- Core fixes for uverbs DMABUF lifetime, RMPP reassembly use after
free, multicast rb-tree corruption, restrack, and a user
triggerable NULL deref when creating a WQ without a CQ
- Prevent userspace from getting a writable mmap of the cxgb4 status
page and the mlx4 clock page
[54 lines not shown]
Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd
Pull iommufd updates from Jason Gunthorpe:
"Several bug fixes, probably found by AI based on the emails:
- Several edge cases in the self test
- Reject malformed invalidation commands in case the VMM let them
through
- Rework how the invalidation interface works to the drivers to be
more robust and fix several Sashiko issues
- Correct several error unwind paths
- UAF during eventq file release
- Reject more malformed usage of the dirty tracking by the VMM"
[16 lines not shown]
Merge tag 'for-linus-tsm' of https://github.com/jgunthorpe/linux
Pull TSM update from Jason Gunthorpe:
"One patch to update the maintainers file following Dan's passing for
TSM subsystem. Three people have volunteered to help complete this
work"
* tag 'for-linus-tsm' of https://github.com/jgunthorpe/linux:
coco/tsm: Update maintainership
