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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc core fixes from Ingo Molnar:
- Fix an MM-CID race that can cause an OOB write (Rik van Riel)
- Fix a debugobjects OOM handling race (Thomas Gleixner)
* tag 'core-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
debugobjects: Plug race against a concurrent OOM disable
sched/mmcid: Fix OOB clear_bit when CID is MM_CID_UNSET in fixup path
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull more MM updates from Andrew Morton:
- "khugepaged: add mTHP collapse support" (Nico Pache)
Provide khugepaged with the capability to collapse anonymous memory
regions to mTHPs
- "Remove CONFIG_READ_ONLY_THP_FOR_FS and enable file THP for writable
files" (Zi Yan)
Remove the READ_ONLY_THP_FOR_FS check in file_thp_enabled(), so that
khugepaged and MADV_COLLAPSE can run on filesystems with PMD THP
pagecache support even without READ_ONLY_THP_FOR_FS enabled
- "make MM selftests more CI friendly" (Mike Rapoport)
General fixes and cleanups to the MM selftests. Also move more MM
selftests under the kselftest framework, making them more amenable to
ongoing CI testing
- "selftests/mm: fix failures and robustness improvements" and
"selftests/mm: assorted fixes for hmm-tests" (Sayali Patil)
Fix several issues in MM selftests which were revealed by powerpc 64k
pagesize
* tag 'mm-stable-2026-06-23-08-55' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (118 commits)
Revert "mm: limit filemap_fault readahead to VMA boundaries"
mm/vmscan: pass NULL to trace vmscan node reclaim
mm: use mapping_mapped to simplify the code
selftests/mm: fix exclusive_cow test fork() handling
selftests/mm: remove hardcoded THP sizing assumptions in hmm tests
selftests/mm: allow PUD-level entries in compound testcase of hmm tests
mm/gup_test: reject wrapped user ranges
mm/page_frag: reject invalid CPUs in page_frag_test
mm/damon/core: always put unsuccessfully committed target pids
mm: page_isolation: avoid unsafe folio reads while scanning compound pages
mm/shrinker: do not hold RCU lock in shrinker_debugfs_count_show()
selftests: mm: fix and speedup "droppable" test
mm: merge writeout into pageout
MAINTAINERS: add Hao Ge as reviewer for codetag and alloc_tag
selftests/mm: clarify alternate unmapping in compaction_test
selftests/mm: move hwpoison setup into run_test() and silence modprobe output for memory-failure category
selftests/mm: skip uffd-stress test when nr_pages_per_cpu is zero
selftests/mm: skip uffd-wp-mremap if UFFD write-protect is unsupported
selftests/mm: ensure destination is hugetlb-backed in hugetlb-mremap
selftest/mm: register existing mapping with userfaultfd in hugetlb-mremap
...
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syzbot reported a puzzling splat:
WARNING: kernel/time/hrtimer.c:443 at stub_timer+0xa/0x20
stub_timer() is installed as timer callback function in
hrtimer_fixup_assert_init(), which is invoked when
debug_object_assert_init() can't find a shadow object. In that case debug
objects emits a warning about it before invoking the fixup.
Though the provided console log lacks this warning and instead has the
following a few seconds before the splat:
ODEBUG: Out of memory. ODEBUG disabled
So the object was looked up in debug_object_assert_init() and the lookup
failed due a concurrent out of memory situation which disabled debug
objects and freed the shadow objects:
debug_object_assert_init()
if (!debug_objects_enabled)
return; obj = alloc();
if (!obj) {
// Out of memory
debug_objects_enabled = false;
free_objects();
obj = lookup_or_alloc();
// The lookup failed because the other side
// removed the objects, so this returns
// an error code as the object in question
// is not statically initialized
if (!IS_ERR_OR_NULL(obj))
return;
if (!obj) {
debug_oom();
return;
}
print(...)
if (!debug_objects_enabled)
return;
fixup(...)
The debug object splat is skipped because debug_objects_enabled is false,
but the fixup callback is invoked unconditionally, which makes the timer
disfunctional.
This is only a problem in debug_object_assert_init() and
debug_object_activate() as both have to handle statically initialized
objects and therefore must handle the error pointer return case
gracefully. All other places only handle the found/not found case and the
NULL pointer return is a signal for OOM. Otherwise they get a valid shadow
object.
Plug the hole by checking whether debug objects are still enabled before
invoking the print and fixup function in those two places.
Fixes: b84d435cc228 ("debugobjects: Extend to assert that an object is initialized")
Reported-by: syzbot+5e8dda76ca21dae314b6@syzkaller.appspotmail.com
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/874iiwlzlb.ffs@fw13
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I keep having to do this, because people think they can just move
directories around and move the gitignore files around with them.
You really can't do that - the old generated files stay around for
others, and still need to be ignored in the old location.
So when moving gitignore entries around because you moved the files (or
when moving a whole gitignore file around because the directory it was
in moved), the old gitignore situation needs to be dealt with.
Yes, those files may have moved in *your* tree when you moved the
directory. And yes, new repositories will never even have seen them.
But all those other developers that see the result of your move still
likely have a working tree with the old state, and the files that were
hidden from git by an old gitignore file do not suddenly become
relevant.
Fixes: 3626738bc714 ("raid6: move to lib/raid/")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- "taskstats: fix TGID dead-thread stat retention" (Yiyang Chen)
Fix a taskstats TGID aggregation bug where fields added in the TGID
query path were not preserved after thread exit, and adds a kselftest
covering the regression.
- "lib/tests: string_helpers: Slight improvements" (Andy Shevchenko)
Improve lib/tests/string_helpers_kunit.c a little
- "lib/base64: decode fixes" (Josh Law)
Address minor issues in lib/base64.c
- "selftests/filelock: Make output more kselftestish" (Mark Brown)
Make the output from the ofdlocks test a bit easier for tooling to
work with. Also ignore the generated file
- "uaccess: unify inline vs outline copy_{from,to}_user() selection"
(Yury Norov)
Simplify the usercopy code by removing the selectability of inlining
copy_{from,to}_user().
- "ocfs2: validate inline xattr header consumers" (ZhengYuan Huang)
Fix a number of possible issues in the ocfs2 xattr code
- "lib and lib/cmdline enhancements" (Dmitry Antipov)
Provide additional robustness checking in the cmdline handling code
and its in-kernel testing and selftests
- "cleanup the RAID6 P/Q library" (Christoph Hellwig)
Clean up the RAID6 P/Q library to match the recent updates to the
RAID 5 XOR library and other CRC/crypto libraries
- "ocfs2: harden inode validators against forged metadata" (Michael
Bommarito)
Add three structural checks to OCFS2 dinode validation so malformed
on-disk fields are rejected before ocfs2_populate_inode() copies them
into the in-core inode
- "lib/raid: replace __get_free_pages() call with kmalloc()" (Mike
Rapoport)
Clean up the lib/raid code by using kmalloc() in more places
* tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (108 commits)
ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write
ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits
lib: interval_tree_test: validate benchmark parameters
ocfs2: avoid moving extents to occupied clusters
treewide: fix transposed "sign" typos and update spelling.txt
ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec
fat: reject BPB volumes whose data area starts beyond total sectors
selftests/uevent: increase __UEVENT_BUFFER_SIZE to avoid ENOBUFS on busy systems
lib/test_firmware: allocate the configured into_buf size
fs: efs: remove unneeded debug prints
checkpatch: cuppress warnings when Reported-by: is followed by Link:
MAINTAINERS: add Alexander as a kcov reviewer
mailmap: update Alexander Sverdlin's Email addresses
fs: fat: inode: replace sprintf() with scnprintf()
ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent
ocfs2: fix race between ocfs2_control_install_private() and ocfs2_control_release()
ocfs2/dlm: require a ref for locking_state debugfs open
ocfs2: reject FITRIM ranges shorter than a cluster
ocfs2: validate fast symlink target during inode read
ocfs2: add journal NULL check in ocfs2_checkpoint_inode()
...
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Letting a function argument indicate whether a lock or unlock operation
should be performed is incompatible with compile-time analysis of locking
operations by sparse and Clang. Hence, split codetag_lock_module_list()
into two functions: a function that locks cttype->mod_lock and another
function that unlocks cttype->mod_lock. No functionality has been
changed. See also commit 916cc5167cc6 ("lib: code tagging framework").
Link: https://lore.kernel.org/20260324214226.3684605-1-bvanassche@acm.org
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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allocinfo_start() only reinitializes the codetag iterator at position 0.
For subsequent reads (position > 0), it reuses cached iterator state from
the previous batch. allocinfo_stop() drops mod_lock between read batches,
which allows module unload to complete and free the module memory that the
cached iterator still references:
CPU0 (read) CPU1 (rmmod)
---- ----
allocinfo_start(pos=0)
down_read(mod_lock)
allocinfo_show()
...
allocinfo_stop()
up_read(mod_lock)
codetag_unload_module()
kfree(cmod)
release_module_tags()
...
free_mod_mem()
allocinfo_start(pos=N)
down_read(mod_lock)
// reuses cached iter, skips re-init
allocinfo_show()
ct->filename <-- UAF
After free_mod_mem() frees the module's .rodata, allocinfo_show()
dereferences ct->filename, ct->function which point there.
Save the iterator state in allocinfo_next() and resume from it in
allocinfo_start() with codetag_next_ct(), which detects module removal via
idr_find() returning NULL and skips to the next module.
Link: https://lore.kernel.org/20260604065938.105991-1-hao.ge@linux.dev
Fixes: 9f44df50fee4 ("alloc_tag: keep codetag iterator active between read()")
Signed-off-by: Hao Ge <hao.ge@linux.dev>
Suggested-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Pages allocated before page_ext is available have their codetag left
uninitialized. Track these early PFNs and clear their codetag in
clear_early_alloc_pfn_tag_refs() to avoid "alloc_tag was not set" warnings
when they are freed later.
Currently a fixed-size array of 8192 entries is used, with a warning if
the limit is exceeded. However, the number of early allocations depends
on the number of CPUs and can be larger than 8192.
Replace the fixed-size array with a dynamically allocated linked list of
pfn_pool structs. Each node is allocated via alloc_page() and mapped to a
pfn_pool containing a next pointer, an atomic slot counter, and a PFN
array that fills the remainder of the page.
The tracking pages themselves are allocated via alloc_page(), which would
trigger __pgalloc_tag_add() -> alloc_tag_add_early_pfn() and recurse
indefinitely. Introduce __GFP_NO_CODETAG (reuses the %__GFP_NO_OBJ_EXT
bit) and pass gfp_flags through pgalloc_tag_add() so that the early path
can skip recording allocations that carry this flag.
Link: https://lore.kernel.org/20260604024008.46592-1-hao.ge@linux.dev
Signed-off-by: Hao Ge <hao.ge@linux.dev>
Suggested-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux
Pull liveupdate updates from Mike Rapoport:
"Kexec Handover (KHO):
- make memory preservation compatible with deferred initialization
of the memory map
Live Update Orchestrator (LUO):
- add LIVEUPDATE_SESSION_GET_NAME ioctl and parameter verification
for LIVEUPDATE_IOCTL_CREATE_SESSION ioctl
- documentation updates for liveupdate=on command line option,
systemd support and the current compatibility status
- remove the fixed limits on the number of files that can be
preserved within a single session, and the total number of
sessions managed by the LUO
Misc fixes:
- reference count incoming File-Lifecycle-Bound (FLB) data so
it cannot be freed while a subsystem is still using it
- fixes for a TOCTOU race in luo_session_retrieve(), a use-
after-free in the file finish and unpreserve paths, concurrent
session mutations during reboot and serialization on
preserve_context kexec
- make sure ioctls for incoming LUO sessions are blocked for
outgoing sessions and vice versa
- make sure KHO scratch size is always aligned by
CMA_MIN_ALIGNMENT_BYTES
- fix memblock tests build issue introduced by KHO changes"
* tag 'liveupdate-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux: (36 commits)
liveupdate: Document that retrieve failure is permanent
docs: memfd_preservation: fix rendering of ABI documentation
selftests/liveupdate: Add stress-files kexec test
selftests/liveupdate: Add stress-sessions kexec test
selftests/liveupdate: Test session and file limit removal
liveupdate: Remove limit on the number of files per session
liveupdate: Remove limit on the number of sessions
liveupdate: defer session block allocation and physical address setting
kho: add support for linked-block serialization
liveupdate: Extract luo_session_deserialize_one helper
liveupdate: Extract luo_file_deserialize_one helper
liveupdate: register luo_ser as KHO subtree
liveupdate: centralize state management into struct luo_ser
liveupdate: avoid mixing cleanup guards with goto in luo_session_retrieve_fd
liveupdate: change file_set->count type to u64 for type safety
liveupdate: Remove unused ser field from struct luo_session
liveupdate: fix u-a-f in luo_file_unpreserve_files() and luo_file_finish()
liveupdate: block session mutations during reboot
liveupdate: fix TOCTOU race in luo_session_retrieve()
liveupdate: skip serialization for context-preserving kexec
...
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git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull strncpy removal from Kees Cook:
- Remove the per-arch strncpy implementations in alpha, m68k, powerpc,
x86, and xtensa
- Remove strncpy API
Over the last 6 years working on strncpy removal there were 362
commits by 70 contributors. Folks with more than 1 commit were:
211 Justin Stitt <justinstitt@google.com>
22 Xu Panda <xu.panda@zte.com.cn>
21 Kees Cook <kees@kernel.org>
17 Thorsten Blum <thorsten.blum@linux.dev>
12 Arnd Bergmann <arnd@arndb.de>
4 Pranav Tyagi <pranav.tyagi03@gmail.com>
4 Lee Jones <lee@kernel.org>
2 Steven Rostedt <rostedt@goodmis.org>
2 Sam Ravnborg <sam@ravnborg.org>
2 Marcelo Moreira <marcelomoreira1905@gmail.com>
2 Krzysztof Kozlowski <krzk@kernel.org>
2 Kalle Valo <kvalo@kernel.org>
2 Jaroslav Kysela <perex@perex.cz>
2 Daniel Thompson <danielt@kernel.org>
2 Andrew Lunn <andrew@lunn.ch>
* tag 'strncpy-removal-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
string: Remove strncpy() from the kernel
xtensa: Remove arch-specific strncpy() implementation
x86: Remove arch-specific strncpy() implementation
powerpc: Remove arch-specific strncpy() implementation
m68k: Remove arch-specific strncpy() implementation
alpha: Remove arch-specific strncpy() implementation
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "selftests/mm: clean up build output and verbosity" (Li Wang)
Remove some noise from the MM selftests build
- "mm: Free contiguous order-0 pages efficiently" (Ryan Roberts)
Speed up the freeing of a batch of 0-order pages by first scanning
them for coalescing opportunities. This is applicable to vfree() and
to the releasing of frozen pages
- "mm/damon: introduce DAMOS failed region quota charge ratio"
(SeongJae Park)
Address a DAMOS usability issue: The DAMOS quota often exhausts
prematurely because it charges for all memory attempted, causing slow
and inconsistent performance when actions fail on unreclaimable
memory.
To fix this, a new feature lets users set a smaller, flexible quota
charge ratio (via a numerator and denominator) for failed regions.
Since failed actions cause less overhead, reducing their quota cost
ensures more predictable and efficient DAMOS processing
- "selftests/cgroup: improve zswap tests robustness and support large
page sizes" (Li Wang)
Fix various spurious failures and improves the overall robustness of
the cgroup zswap selftests
- "fix MAP_DROPPABLE not supported errno" (Anthony Yznaga)
Fix an issue in the mlock selftests on arm32
- "mm: huge_memory: clean up defrag sysfs with shared" (Breno Leitao)
Some maintenance work in the huge_memory code
- "treewide: fixup gfp_t printks" (Brendan Jackman)
Use the special vprintf() gfp_t conversion in various places
- "mm: Fix vmemmap optimization accounting and initialization" (Muchun
Song)
Fix several bugs in the vmemmap optimization, mainly around incorrect
page accounting and memmap initialization in the DAX and memory
hotplug paths. It also fixes pageblock migratetype initialization and
struct page initialization for ZONE_DEVICE compound pages
- "mm/damon: repost non-hotfix reviewed patches in damon/next tree"
A sprinkle of unrelated minor bugfixes for DAMON
- "mm: remove page_mapped()" (David Hildenbrand)
Remove this function from the tree, replacing it with folio_mapped()
- "mm/damon: let DAMON be paused and resumed" (SeongJae Park)
Allow DAMON to be paused and resumed without losing its current state
- "kasan: hw_tags: Disable tagging for stack and page-tables" (Muhammad
Usama Anjum)
Simplify and speed up kasan by removing its ineffective tagging of
stacks and page tables
- "mm/damon/reclaim,lru_sort: monitor all system rams by default"
(SeongJae Park)
Simplify deployment on diverse hardware like NUMA systems by updating
DAMON_RECLAIM and DAMON_LRU_SORT to automatically monitor the
physical address range covering all System RAM areas by default,
replacing the overly restrictive behavior that only targeted the
single largest memory block to save on negligible overhead
- "mm/damon/sysfs: document filters/ directory as deprecated" (SeongJae
Park)
Update some DAMON docs
- "mm: use spinlock guards for zone lock" (Dmitry Ilvokhin)
Switch zone->lock handling over to using the guard() mechanisms
- "mm/filemap: tighten mmap_miss hit accounting" (fujunjie)
Fix a flaw where the mmap_miss counter over-credited page cache hits
during fault-arounds and page-fault retries. This results in
significant reduction of redundant synchronous mmap readahead I/O,
drastically cutting down execution time and gigabytes read for sparse
random or strided memory access workloads
- "selftests/cgroup: Fix false positive failures in test_percpu_basic"
(Li Wang)
Fix a couple of false-positives in the cgroup kmem selftests
- "mm/damon/reclaim: support monitoring intervals auto-tuning"
(SeongJae Park)
Add a new parameter to DAMON permitting DAMON_RECLAIM to
automatically tune DAMON's sampling and aggregation intervals
- "mm/damon/stat: add kdamond_pid parameter" (SeongJae Park)
Change DAMON_STAT to provide the pid of its kdamond
- "mm/kmemleak: dedupe verbose scan output" (Breno Leitao)
Remove large amounts of duplicated backtraces from the verbose-mode
kmemleak output
- "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 1)" (David
Hildenbrand)
Reduce our use of CONFIG_HAVE_BOOTMEM_INFO_NODE, with a view to
removing it entirely in a later series
- "mm/damon: validate min_region_size to be power of 2" (Liew Rui Yan)
Prevent users from passing a non-power-of-2 value of `addr_unit', as
this later results in undesirable behavior
- "mm: document read_pages and simplify usage" (Frederick Mayle)
- "tools/mm/page-types: Fix misc bugs" (Ye Liu)
Fix three issues in tools/mm/page-types.c
- "mm: misc cleanups from __GFP_UNMAPPED series" (Brendan Jackman)
Implement several cleanups in the page allocator and related code
- "mm, swap: swap table phase IV: unify allocation" (Kairui Song)
Unify the allocation and charging of anon and shmem swap in folios,
provides better synchronization, consolidates the metadata
management, hence dropping the static array and map, and improves
performance
- "mm/damon: introduce data attributes monitoring" (SeongJae Park(
Extend DAMON to monitor general data attributes other than accesses
- "mm/vmalloc: free unused pages on vrealloc() shrink" (Shivam Kalra)
Implement the TODO in vrealloc() to unmap and free unused pages when
shrinking across a page boundary
- "mm/damon: documentation and comment fixes" (niecheng)
- "remove mmap_action success, error hooks" (Lorenzo Stoakes)
Eliminate custom hooks from mmap_action by removing the problematic
success_hook which allowed drivers to improperly access uninitialized
VMAs. It replaces the error_hook with a simple error-code field and
updates the memory char driver accordingly
- "mm/damon: minor improvements for code readability and tests"
(SeongJae Park)
- "mm/damon: fix macro arguments and clarify quota goals doc" (Maksym
Shcherba)
- "userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c" (Mike
Rapoport)
- "mm/mglru: improve reclaim loop and dirty folio" (Kairui Song and
others)
Clean up and slightly improves MGLRU's reclaim loop and dirty
writeback handling. Large performance improvements are measured
- "use vma locks for proc/pid/{smaps|numa_maps} reads" (Suren
Baghdasaryan)
Use per-vma locks when reading /proc/pid/smaps and numa_maps similar
to reduce contention on central mmap_lock
- "refactors thpsize_shmem_enabled_store() and thpsize_shmem_enabled_show()"
(Ran Xiaokai)
Some cleanup work in the THP code
- "selftests/memfd: fix compilation warnings" (Konstantin Khorenko)
Fix a few build glitches in the memfd selftest code.
- "memcg: shrink obj_stock_pcp and cache multiple objcgs" (Shakeel
Butt)
Resolve a 68% performance regression caused by NUMA-node cache
thrashing around struct obj_stock_pcp by shrinking its existing
fields and expanding it into a multi-slot array that caches up to
five obj_cgroup pointers per CPU, allowing per-node variants of the
same memcg to coexist within a single 64-byte cache line.
- "zram: writeback fixes" (Sergey Senozhatsky)
address a couple of unrelated zram writeback issues
- "mm: switch THP shrinker to list_lru" (Johannes Weiner)
Resolve NUMA-awareness issues and streamlines callsite interaction by
refactoring and extending the list_lru API to completely replace the
complex, open-coded deferred split queue for Transparent Huge Pages
- "mm: improve large folio readahead for exec memory" (Usama Arif)
Improve large-folio readahead on systems like 64K-page arm64 by
preventing the mmap_miss check from permanently disabling
target-oriented VM_EXEC readahead, and by generalizing the
force_thp_readahead gate to support mappings with any usefully large
maximum folio order under the cache cap.
- "userfaultfd/pagemap: pre-existing fixes" (Kiryl Shutsemau)
Fix a bunch of minor issues in the userfaultfd/pagemap, all of which
were flagged by Sashiko review of proposed new material
- "mm/sparse-vmemmap: Provide generic vmemmap_set_pmd() and
vmemmap_check_pmd()" (Muchun Song)
Provide generic versions of these two functions so the four
arch-specific implementations can be removed.
- "mm/swap, PM: hibernate: fix swapoff race in uswsusp by pinning swap
device" (Youngjun Park)
Address a uswsusp-vs-swapoff race and reduces the swap device
reference taking/releasing frequency.
- "mm/hmm: A fix and a selftest" (Dev Jain)
* tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (321 commits)
selftests/mm/hmm-tests: test pagemap reads of PMD device-private entries
fs/proc/task_mmu: do not warn on seeing non-migration pmd entry
lib/test_hmm: check alloc_page_vma() return value and handle OOM
mm/compaction: cap compact_gap() at COMPACT_CLUSTER_MAX
mm/swap: remove redundant swap device reference in alloc/free
mm/swap, PM: hibernate: fix swapoff race in uswsusp by pinning swap device
mm/filemap: use folio_next_index() for start
vmalloc: fix NULL pointer dereference in is_vm_area_hugepages()
sparc/mm: drop vmemmap_check_pmd helper and use generic code
loongarch/mm: drop vmemmap_check_pmd helper and use generic code
riscv/mm: drop vmemmap_pmd helpers and use generic code
arm64/mm: drop vmemmap_pmd helpers and use generic code
mm/sparse-vmemmap: provide generic vmemmap_set_pmd() and vmemmap_check_pmd()
rust: page: mark Page::nid as inline
userfaultfd: build __VMA_UFFD_FLAGS from config-gated masks
userfaultfd: gate must_wait writability check on pte_present()
mm/huge_memory: preserve pmd_swp_uffd_wp on device-private PMD downgrade
fs/proc/task_mmu: fix hugetlb self-deadlock in pagemap_scan_pte_hole()
fs/proc/task_mmu: use huge_page_size() in pagemap_scan_hugetlb_entry()
fs/proc/task_mmu: fix make_uffd_wp_huge_pte() prot-update race
...
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing updates from Steven Rostedt:
- Remove a redundant IS_ERR() check
trace_pipe_open() already checks for IS_ERR() and does it again in
the return path. Remove the return check.
- Export seq_buf_putmem_hex() to allow kunit tests against them
To add Kunit tests on seq_buf_putmem_hex(), it needs to be exported.
- Replace strcat() and strcpy() with seq_buf() logic
The code for synthetic events uses a series of strcat() and strcpy()
which can be error prone. Replace them with seq_buf() logic that does
all the necessary bound checking.
- Add a lockdep rcu_is_watching() to trace_##event##_enabled() call
The trace_##event##_enabled() is a static branch that is true if the
"event" is enabled. But this can hide bugs if this logic is in a
location where RCU is disabled and not "watching". It would only
trigger if lockdep is enabled and the event is enabled.
Add a "rcu_is_watching()" warning if lockdep is enabled in that
helper function to trigger regardless if the event is enabled or not.
- Remove the local variable in the trace_printk() macro
For name space integrity, remove the _______STR variable in the
trace_printk() macro for using the sizeof() macro directly.
- Use guard()s for the trace_recursion_record.c file
- Fix typo in a comment of eventfs_callback() kerneldoc
- Use trace_call__##event() in events within trace_##event##_enabled()
A couple of events are called within an if block guarded by
trace_##event##_enabled(). That is a static key that is only enabled
when the event is enabled. The trace_call_##event() calls the
tracepoint code directly without adding a redundant static key for
that check.
- Allow perf to read synthetic events
Currently, perf does not have the ability to enable a synthetic
event. If it does, it will either cause a kernel warning or error
with "No such device". Synthetic events are not much different than
kprobes and perf can handle fine with a few modifications.
- Replace printk(KERN_WARNING ...) with pr_warn()
- Replace krealloc() on an array with krealloc_array()
- Fix README file path name for synthetic events
- Change tracing_map tracing_map_array to use a flexible array
Instead of allocating a separate pointer to hold the pages field of
tracing_map_array, allocate the pages field as a flexible array when
allocating the structure.
- Fold trace_iterator_increment() into trace_find_next_entry_inc()
The function trace_iterator_increment() was only used by
trace_find_next_entry_inc(). It's not big enough to be a helper
function for one user. Fold it into its caller.
- Make field_var_str field a flexible array of hist_elt_data
Instead of allocating a separate pointer for the field_var_str array
of the hist_elt_data structure, allocate it as a flexible array when
allocating the structure.
- Disable KCOV for trace_irqsoff.c
Like trace_preemptirq.c, trace_irqsoff.c has code that will crash
when KCOV is enabled on ARM. The irqsoff tracing can be called on ARM
because the irqsoff tracing code can be run from early interrupt code
and produce coverage unrelated to syscall inputs.
- Fix warning in __unregister_ftrace_function() called by perf
Perf calls unregister_ftrace_function() without checking if its
ftrace_ops has already been unregistered. There's an error path where
on clean up it will unregister the ftrace_ops even if it wasn't
registered and causes a warning.
* tag 'trace-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
perf/ftrace: Fix WARNING in __unregister_ftrace_function
tracing: Disable KCOV instrumentation for trace_irqsoff.o
tracing: Turn hist_elt_data field_var_str into a flexible array
tracing: Move trace_iterator_increment() into trace_find_next_entry_inc()
tracing: Simplify pages allocation for tracing_map logic
tracing: Fix README path for synthetic_events
tracing: Use krealloc_array() for trace option array growth
tracing/branch: Use pr_warn() instead of printk(KERN_WARNING)
tracing: Allow perf to read synthetic events
HID: Use trace_call__##name() at guarded tracepoint call sites
cpufreq: amd-pstate: Use trace_call__##name() at guarded tracepoint call site
tracefs: Fix typo in a comment of eventfs_callback() kerneldoc
tracing: Switch trace_recursion_record.c code over to use guard()
tracing: Remove local variable for argument detection from trace_printk()
tracepoint: Add lockdep rcu_is_watching() check to trace_##name##_enabled()
tracing: Bound synthetic-field strings with seq_buf
seq_buf: Export seq_buf_putmem_hex() and add KUnit tests
tracing: Remove redundant IS_ERR() check in trace_pipe_open()
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strncpy() has been a persistent source of bugs due to its ambiguous
intended usage and frequently counter-intuitive semantics: it may not
NUL-terminate the destination, and it unconditionally zero-pads to the
full length, which isn't always needed. All former callers have been
migrated[1] to:
- strscpy() for NUL-terminated destinations
- strscpy_pad() for NUL-terminated destinations needing zero-padding
- strtomem_pad() for non-NUL-terminated fixed-width fields
- memcpy_and_pad() for bounded copies with explicit padding
- memcpy() for known-length copies
Remove the generic implementation, its declaration, the FORTIFY_SOURCE
wrapper, and associated tests.
Link: https://github.com/KSPP/linux/issues/90 [1]
Signed-off-by: Kees Cook <kees@kernel.org>
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The interval tree runtime test accepts module parameters that are later
used as divisors while generating randomized intervals and while reporting
average timings. For example, max_endpoint=1 makes the generated interval
end value zero and the next modulo operation divides by that zero value.
Reject non-positive counts and require max_endpoint to provide at least
one non-zero generated endpoint before the test allocates state or starts
the benchmark.
[akpm@linux-foundation.org: include printk.h for pr_warn()]
Assisted-by: Codex:gpt-5.5-cyber-preview
Signed-off-by: Samuel Moelius <sam.moelius@trailofbits.com>
Link: https://lore.kernel.org/20260609005446.1241288.1525a5964698.interval-tree-test-small-max-endpoint-div0@trailofbits.com
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- Add upper case flavor for printing MAC addresses (%p[mM][U]) and use
it in the nintendo driver
- Fix matching of hash_pointers= parameter modes
- Fix size check of vsprintf() field_width and precision values
- Add check of size returned by vsprintf()
- Add KUnit test for restricted pointer printing (%pK)
- Some code cleanup
* tag 'printk-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
HID: nintendo: Use %pM format specifier for MAC addresses
vsprintf: Add upper case flavour to %p[mM]
lib/vsprintf: replace min_t/max_t with min/max
printk: fix typos in comments
lib/vsprintf: Require exact hash_pointers mode matches
vsprintf: Add test for restricted kernel pointers
vsprintf: Only export no_hash_pointers to test module
lib/vsprintf: Limit the returning size to INT_MAX
lib/vsprintf: Fix to check field_width and precision
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git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
Pull audit updates from Paul Moore:
- Fix a recursive deadlock when duplicating executable file rules
Avoid multiple lookups and attempted I_MUTEX_PARENT locks when moving
watched files by passing the already resolved inodes through the
audit code.
- Fix removal of executable watch rules after the file is deleted
Prior to this fix we were unable to remove an executable file watch
where the file had been previously deleted due to a negative dentry
check in the code that performs the lookup on the file watches.
- Convert our basic "unsigned" type usage to "unsigned int".
* tag 'audit-pr-20260615' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
audit: fix recursive locking deadlock in audit_dupe_exe()
audit: fix removal of dangling executable rules
audit: use 'unsigned int' instead of 'unsigned'
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Pull workqueue updates from Tejun Heo:
- Continued progress toward making alloc_workqueue() unbound by
default: more callers converted to WQ_PERCPU / system_percpu_wq /
system_dfl_wq, and new warnings for queues that use neither WQ_PERCPU
nor WQ_UNBOUND or the legacy system_wq / system_unbound_wq.
- Misc: drop the now-trivial apply_wqattrs_lock()/unlock() wrappers,
forbid the TEST_WORKQUEUE benchmark from being built-in, and fix a
spurious pointer level in the worker debug-dump path.
* tag 'wq-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
drm/bridge: anx7625: Add WQ_PERCPU add to alloc_workqueue
wifi: ath6kl: fix invalid workqueue flags in ath6kl_usb_create()
btrfs: Drop WQ_PERCPU from ordered_flags in btrfs_init_workqueues()
workqueue: Add warnings and ensure one among WQ_PERCPU or WQ_UNBOUND is present
workqueue: Add warnings and fallback if system_{unbound}_wq is used
workqueue: drop spurious '*' from print_worker_info() fn declaration
workqueue: forbid TEST_WORKQUEUE from being built-in
workqueue: drop apply_wqattrs_lock()/unlock() wrappers
umh: replace use of system_unbound_wq with system_dfl_wq
rapidio: rio: add WQ_PERCPU to alloc_workqueue users
media: ddbridge: add WQ_PERCPU to alloc_workqueue users
platform: cznic: turris-omnia-mcu: replace use of system_wq with system_percpu_wq
media: synopsys: hdmirx: replace use of system_unbound_wq with system_dfl_wq
virt: acrn: Add WQ_PERCPU to alloc_workqueue users
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Pull bitmap updates from Yury Norov:
"This includes the new FIELD_GET_SIGNED() helper,
bitmap_print_to_pagebuf() removal, RISCV/bitrev support, and a couple
cleanups.
- new handy helper FIELD_GET_SIGNED() (Yury)
- arch test_and_set_bit_lock() and clear_bit_unlock() cleanup (Randy)
- __bf_shf() simplification (Yury)
- bitmap_print_to_pagebuf() removal (Yury)
- RISCV/bitrev conditional support (Jindie, Yury)"
* tag 'bitmap-for-7.2' of https://github.com/norov/linux:
MAINTAINERS: BITOPS: include bitrev.[ch]
arch/riscv: Add bitrev.h file to support rev8 and brev8
bitops: Define generic___bitrev8/16/32 for reuse
lib/bitrev: Introduce GENERIC_BITREVERSE
arch: select HAVE_ARCH_BITREVERSE conditionally on BITREVERSE
bitmap: fix find helper documentation
bitmap: drop bitmap_print_to_pagebuf()
cpumask: switch cpumap_print_to_pagebuf() to using scnprintf()
bitfield: wire __bf_shf to __builtin_ctzll
bitops: use common function parameter names
ptp: switch to using FIELD_GET_SIGNED()
rtc: rv3032: switch to using FIELD_GET_SIGNED()
wifi: rtw89: switch to using FIELD_GET_SIGNED()
iio: mcp9600: switch to using FIELD_GET_SIGNED()
iio: pressure: bmp280: switch to using FIELD_GET_SIGNED()
iio: magnetometer: yas530: switch to using FIELD_GET_SIGNED()
iio: intel_dc_ti_adc: switch to using FIELD_GET_SIGNED()
x86/extable: switch to using FIELD_GET_SIGNED()
bitfield: add FIELD_GET_SIGNED()
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git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Pull bpf updates from Alexei Starovoitov:
"Major changes:
- Recover from BPF arena page faults using a scratch page and add
ptep_try_set() for lockless empty-slot installs on x86 and arm64.
This allows BPF kfuncs to access arena pointers directly.
The 'arena_direct_access' stable branch was created for this work
and was pulled into sched-ext and bpf-next trees (Tejun Heo, Kumar
Kartikeya Dwivedi)
- Lift old restriction and support 6+ arguments in BPF programs and
kfuncs on x86 and arm64 (Yonghong Song, Puranjay Mohan)
Other features and fixes:
- Add 24-bit BTF vlen and reclaim unused bits in the BTF UAPI to ease
addition of new BTF kinds (Alan Maguire)
- Raise the maximum BPF call chain depth from 8 to 16 frames (Alexei
Starovoitov)
- Refactor object relationship tracking in the verifier and fix a
dynptr use-after-free bug (Amery Hung)
- Harden the signed program loader and reject exclusive maps as inner
maps (Daniel Borkmann)
- Replace the verifier min/max bounds fields with a circular number
(cnum) representation and improve 32->64 bit range refinements
(Eduard Zingerman)
- Introduce the arena library and runtime (libarena) with a buddy
allocator, rbtree and SPMC queue data structures, ASAN support and
a parallel test harness. Allow subprograms to return arena pointers
and switch to a BTF type-tag based __arena annotation (Emil
Tsalapatis)
- Cache build IDs in the sleepable stackmap path and avoid faultable
build ID reads under mm locks (Ihor Solodrai)
- Introduce the tracing_multi link to attach a single BPF program to
many kernel functions at once. Allow specifying the uprobe_multi
target via FD (Jiri Olsa)
- Extend the bpf_list family of kfuncs with bpf_list_add/del(), and
bpf_list_is_first/is_last/empty() (Kaitao Cheng)
- Extend the BPF syscall with common attributes support for
prog_load, btf_load and map_create (Leon Hwang)
- Wrap rhashtable as BPF map (Mykyta Yatsenko, Herbert Xu)
- Add sleepable support for tracepoint programs and fix deadlocks in
LRU map due to NMI reentry (Mykyta Yatsenko)
- Fix OOB access in bpf_flow_keys, fix nullness analysis of inner
arrays, enforce write checks for global subprograms (Nuoqi Gui)
- Report the maximum combined stack depth and print a breakdown of
instructions processed per subprogram (Paul Chaignon)
- Add an XDP load-balancer benchmark and arm64 JIT support for stack
arguments (Puranjay Mohan)
- Add kfuncs to traverse over wakeup_sources (Samuel Wu)
- Allow sleepable BPF programs to use LPM trie maps directly (Vlad
Poenaru)
- Many more fixes and cleanups across the verifier, BTF, sockmap,
devmap, bpffs, security hooks, s390/riscv/loongarch JITs,
rqspinlock, libbpf, bpftool, selftests"
* tag 'bpf-next-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (336 commits)
selftests/bpf: Work around llvm stack overflow in crypto progs
selftests/bpf: add test for bpf_msg_pop_data() overflow
bpf, sockmap: fix integer overflow in bpf_msg_pop_data() bounds check
sockmap: Fix use-after-free in udp_bpf_recvmsg()
bpf, sockmap: keep sk_msg copy state in sync
bpf, sockmap: Fix wrong rsge offset in bpf_msg_push_data()
bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
selftsets/bpf: Retry map update on helper_fill_hashmap()
selftests/bpf: Add test for sleepable lsm_cgroup rejection
selftests/bpf: Add test to verify the fix for bpf_setsockopt() helper
bpf: Fix bpf_get/setsockopt to tos for ipv4-mapped ipv6 socket
selftests/bpf: Avoid static LLVM linking for cross builds
selftests/bpf: Use common CFLAGS for urandom_read
selftests/bpf: Initialize operation name before use
tools/bpf: build: Append extra cflags
libbpf: Initialize CFLAGS before including Makefile.include
bpftool: Append extra host flags
bpftool: Avoid adding EXTRA_CFLAGS to HOST_CFLAGS
bpftool: Pass host flags to bootstrap libbpf
selftests/bpf: correct CONFIG_PPC64 macro name in comment
...
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull bootconfig updates from Masami Hiramatsu:
- bootconfig: move xbc_snprint_cmdline() to lib/bootconfig.c
Move the xbc_snprint_cmdline() function and its buffer from
main.c to the shared lib/bootconfig.c parser library so it
can be reused by userspace tools.
- render kernel.* subtree as cmdline string with -C
Add a new -C option to print the kernel.* subtree as a flat
command-line string at build time, allowing early parameter
injection without runtime parsing.
* tag 'bootconfig-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tools/bootconfig: render kernel.* subtree as cmdline string with -C
bootconfig: move xbc_snprint_cmdline() to lib/bootconfig.c
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git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kunit updates from Shuah Khan:
"Fixes to tool and kunit core and new features to both to support JUnit
XML (primitive) and backtrace suppression API:
- Core support for suppressing warning backtraces
- Parse and print the reason tests are skipped
- Add (primitive) support for outputting JUnit XML
- Don't write to stdout when it should be disabled
- Add backtrace suppression self-tests
- Suppress intentional warning backtraces in scaling unit tests
- Add documentation for warning backtrace suppression API
- Fix spelling mistakes in comments and messages
- gen_compile_commands: Ignore libgcc.a
- qemu_configs: Add or1k / openrisc configuration"
* tag 'linux_kselftest-kunit-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit:tool: Don't write to stdout when it should be disabled
kunit: tool: Add (primitive) support for outputting JUnit XML
kunit: tool: Parse and print the reason tests are skipped
kunit: Add documentation for warning backtrace suppression API
drm: Suppress intentional warning backtraces in scaling unit tests
kunit: Add backtrace suppression self-tests
bug/kunit: Core support for suppressing warning backtraces
kunit: Fix spelling mistakes in comments and messages
kunit: qemu_configs: Add or1k / openrisc configuration
gen_compile_commands: Ignore libgcc.a
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git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening updates from Kees Cook:
- lkdtm:
- Add case to provoke a crash in EFI runtime services (Ard Biesheuvel)
- add PPC_RADIX_TLBIEL test and missed isync (Sayali Patil)
- stddef: Document designated initializer semantics for
__TRAILING_OVERLAP() (Gustavo A. R. Silva)
- strarray: drop redundant allocation, add __counted_by_ptr (Thorsten
Blum)
* tag 'hardening-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
lkdtm/powerpc: add PPC_RADIX_TLBIEL test for radix MCE validation
lkdtm/powerpc: add isync after slbmte to enforce SLB update ordering
lkdtm: Add case to provoke a crash in EFI runtime services
lib/string_helpers: annotate struct strarray with __counted_by_ptr
lib/string_helpers: drop redundant allocation in kasprintf_strarray
MAINTAINERS: add kernel hardening keyword __counted_by_ptr
stddef: Document designated initializer semantics for __TRAILING_OVERLAP()
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git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux
Pull crypto library updates from Eric Biggers:
- Drop the last architecture-specific implementation of MD5
- Mark clmul32() as noinline_for_stack to improve codegen in some cases
* tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux:
lib/crypto: gf128hash: mark clmul32() as noinline_for_stack
lib/crypto: powerpc/md5: Drop powerpc optimized MD5 code
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git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux
Pull CRC updates from Eric Biggers:
"Accelerate CRC64-NVME for 32-bit ARM by refactoring the arm64 NEON
intrinsics implementation to be shared by 32-bit and 64-bit.
Also apply a similar cleanup to the 32-bit ARM NEON implementation of
xor_gen(), where it now reuses code from the 64-bit implementation"
* tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux:
crypto: aegis128 - Use neon-intrinsics.h on ARM too
lib/crc: arm: Enable arm64's NEON intrinsics implementation of crc64
lib/crc: Turn NEON intrinsics crc64 implementation into common code
xor/arm64: Use shared NEON intrinsics implementation from 32-bit ARM
xor/arm: Replace vectorized implementation with arm64's intrinsics
ARM: Add a neon-intrinsics.h header like on arm64
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git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab updates from Vlastimil Babka:
- Support for "allocation tokens" (currently available in Clang 22+)
for smarter partitioning of kmalloc caches based on the allocated
object type, which can be enabled instead of the "random"
per-caller-address-hash partitioning.
It should be able to deterministically separate types containing a
pointer from those that do not (Marco Elver)
- Improvements and simplification of the kmem_cache_alloc_bulk() and
mempool_alloc_bulk() API. This includes adaptation of callers
(Christoph Hellwig)
- Performance improvements and cleanups related mostly to sheaves
refill (Hao Li, Shengming Hu, Vlastimil Babka)
- Several fixups for the slabinfo tool (Xuewen Wang)
* tag 'slab-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
mm/slab: do not limit zeroing to orig_size when only red zoning is enabled
mm/slub: preserve original size in _kmalloc_nolock_noprof retry path
mm: simplify the mempool_alloc_bulk API
mm/slab: improve kmem_cache_alloc_bulk
mm/slub: detach and reattach partial slabs in batch
mm/slub: introduce helpers for node partial slab state
mm/slub: use empty sheaf helpers for oversized sheaves
tools/mm/slabinfo: remove redundant slab->partial assignment
tools/mm/slabinfo: remove dead assignment in get_obj_and_str()
tools/mm/slabinfo: Fix trace disable logic inversion
MAINTAINERS: add slab-related scripts and tools to SLAB ALLOCATOR
mm/slub: fix typo in sheaves comment
mm, slab: simplify returning slab in __refill_objects_node()
mm, slab: add an optimistic __slab_try_return_freelist()
slab: fix kernel-docs for mm-api
slab: improve KMALLOC_PARTITION_RANDOM randomness
slab: support for compiler-assisted type-based slab cache partitioning
mm/slub: defer freelist construction until after bulk allocation from a new slab
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev
Pull fbdev updates from Helge Deller:
"Beside the removal of the Hercules monochrome ISA graphics driver and
the corresponding text console driver, there is just the typical
maintanance with smaller driver fixes and cleanups:
Removal of drivers:
- Hercules monochrome ISA graphics adapter driver (Ethan Nelson-Moore)
- Hercules mdacon console driver (Ethan Nelson-Moore)
Changes affecting many drivers at once:
- possible memory leak fixes in various drivers (Abdun Nihaal)
- many conversions to use strscpy() (David Laight)
- Use named initializers in drivers (Uwe Kleine-König)
Code fixes:
- fbcon: don't suspend/resume when vc is graphics mode (Lu Yao)
- modedb: fix a possible UAF in fb_find_mode() (Tuo Li)
- modedb: Fix entry for 1920x1080-60 mode (Steffen Persvold)
- arm: Export acorndata_8x8 font symbol for bootloader (Helge Deller)
- omap2: fix use-after-free in omapfb_mmap (Hongling Zeng)
Cleanups:
- pxa168fb: use devm_ioremap_resource() (Alberto Arostegui)
- provice helpers for fb_set_var() and fb_blank() and fbcon updates
(Thomas Zimmermann)
- fbcon: Use correct type for vc_resize() return value (Jiacheng Yu)
- chipsfb: add missing MODULE_DESCRIPTION() macro (Rahman Mahmutović)
- sunxvr2500: replace printk with device-aware logging functions
(Rahman Mahmutović)
- sm712: Fix operator precedence in big_swap macro (Li RongQing)
- imxfb: Use of_device_get_match_data() (Rosen Penev)
- atmel_lcdfb: Use of_device_get_match_data() (Rosen Penev)
Documentation fixes:
- grvga: Fix CLUT register address offset in comment (Eduardo Silva)
- omap/dss: Fix stale modedb.c path (Costa Shulyupin)
- correct CONFIG_FB_TILEBLITTING macro name in #endif comment (Ethan
Nelson-Moore)"
* tag 'fbdev-for-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (43 commits)
fbdev: modedb: Fix misaligned fields in the 1920x1080-60 mode
fbdev: modedb: fix a possible UAF in fb_find_mode()
fbdev: s3fb: Use strscpy() to copy strings into arrays
fbdev: sm501fb: Fix buffer errors in OF binding code
fbcon: correct CONFIG_FB_TILEBLITTING macro name in #endif comment
fbdev/arm: Export acorndata_8x8 font symbol for bootloader
fbdev: mmpfb: Use strscpy() to copy device name
fbdev: sisfb: Replace strlen() strcpy() pair with strscpy()
fbdev: rivafb: Use strscpy() to copy device name
fbdev: cyber2000fb: Use strscpy() to copy device name
fbdev: atmel_lcdfb: Use strscpy() to copy device name
fbdev: Do not export fbcon from fbdev
fbdev: Wrap fbcon updates from vga-switcheroo in helper
fbdev: Wrap user-invoked calls to fb_blank() in helper
fbdev: Wrap user-invoked calls to fb_set_var() in helper
fbdev: omap2: fix use-after-free in omapfb_mmap
docs: omap/dss: Fix stale modedb.c path
fbdev: pxa168fb: use devm_ioremap_resource() for MMIO
fbdev: grvga: Fix CLUT register address offset in comment
fbdev: sunxvr2500: replace printk with device-aware logging functions
...
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git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio updates from Bartosz Golaszewski:
"There's one new driver, one legacy driver removed, a kunit test-suite
for the GPIO core, support for new models in existing drivers and a
slew of various changes in many places though I can't think of
anything controversial that would stand out - it's been a relatively
calm cycle.
GPIO core:
- Add an initial set of kunit test cases for the GPIO subsystem
- Use the devres owner as the GPIO chip's parent in absence of any
other parent
- Fix const-correctness of GPIO chip SRCU guards
- Provide new GPIO consumer interfaces: gpiod_is_single_ended() and
fwnode_gpiod_get()
- Quarantine all legacy GPIO APIs in linux/gpio/legacy.h
- Use __ro_after_init where applicable
New drivers:
- Add driver for the GPIO controller on Waveshare DSI TOUCH panels
Removed drivers:
- Remove the obsolete ts5500 GPIO driver
Driver updates:
- Modernize gpio-timberdale: remove platform data support and use
generic device property accessors
- Extend test build coverage by enabling COMPILE_TEST for more GPIO
drivers
- Add some missing dependencies in Kconfig
- Add support for sparse fixed direction to gpio-regmap
- Remove dead code from gpio-nomadik
- use BIT() in gpio-mxc
- use bitmap_complement() in gpio-xilinx and gpio-pca953x
- Use more appropriate printing functions where applicable
- Use named initializers for platform_device_id and i2c_device_id
arrays
- Convert gpio-altera to using the generic GPIO chip helper library
- Add support for new models to gpio-dwapb, gpio-zynq, gpio-usbio and
gpio-tegra186
- Unify the naming convention for Qualcomm in GPIO drivers
- Fix interrupt bank mapping to GPIO chips in gpio-mt7621
- Add support for the lines-initial-states property to gpio-74x164
- Switch to using dynamic GPIO base in gpio-ixp4xx
- Move the handling of an OF quirk from ASoC to gpiolib-of.c where
other such quirks live
- Use handle_bad_irq() in gpio-ep93xx
- Some other minor tweaks and refactorings
Devicetree bindings:
- Document the Waveshare GPIO controller for DSI TOUCH panels
- Document new models: Tegra238 in gpio-tegra186 and EIO GPIO in
gpio-zynq
- Add new properties for gpio-dwapb and fairchild,74hc595
- Fix whitespace issues
- Sort compatibles alphabetically in gpio-zynq
Documentation:
- Fix kerneldoc warnings in gpio-realtek-otto
Misc:
- Attach software nodes representing GPIO chips to the actual struct
device objects associated with them in some legacy platforms
enabling real firmware node lookup instead of string matching
- Drop unneeded dependencies on OF_GPIO from bus and staging drivers"
* tag 'gpio-updates-for-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (62 commits)
gpio: nomadik: remove dead DB8540 code from <gpio/gpio-nomadik.h>
gpio: mt7621: fix interrupt banks mapping on gpio chips
bus: ts-nbus: drop unneeded dependency on OF_GPIO
staging: media: max96712: drop unneeded dependency on OF_GPIO
gpiolib: Replace strcpy() with memcpy()
gpio: remove obsolete UAF FIXMEs from lookup paths
gpio: core: fix const-correctness of gpio_chip_guard
gpio: mxc: use BIT() macro
gpio: realtek-otto: fix kernel-doc warnings
gpio: max77620: Unify usage of space and comma in platform_device_id array
gpio: Use named initializers for platform_device_id arrays
gpio: cros-ec: Drop unused assignment of platform_device_id driver data
ARM: omap1: enable real software node lookup of GPIOs on Nokia 770
ARM: omap1: use platform_device_register_full() for GPIO devices on OMAP 16xx
ARM: omap1: drop unused variable from omap16xx_gpio_init()
gpio: gpiolib: use seq_puts() for plain strings
gpio: ts5500: remove obsolete driver
gpio: add kunit test cases for the GPIO subsystem
kunit: provide kunit_platform_device_unregister()
kunit: provide kunit_platform_device_register_full()
...
|
|
gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Ingo Molnar:
- A large series of KLP fixes and improvements, in preparation of the
arm64 port (Josh Poimboeuf)
- Fix a number of bugs and issues on specific distro, LTO, FineIBT and
kCFI configs (Josh Poimboeuf)
- Misc other fixes by Josh Poimboeuf and Joe Lawrence
* tag 'objtool-core-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (53 commits)
objtool/klp: Cache dont_correlate() result
objtool: Improve and simplify prefix symbol detection
objtool/klp: Fix kCFI prefix finding/cloning
objtool: Grow __cfi_* prefix symbols for all CFI+CALL_PADDING
objtool/klp: Fix position-dependent checksums for non-relocated jumps/calls
objtool: Add insn_sym() helper
objtool/klp: Add correlation debugging output
objtool/klp: Rewrite symbol correlation algorithm
objtool/klp: Calculate object checksums
klp-build: Validate short-circuit prerequisites
objtool/klp: Remove "objtool --checksum"
klp-build: Use "objtool klp checksum" subcommand
objtool/klp: Add "objtool klp checksum" subcommand
objtool: Consolidate file decoding into decode_file()
objtool/klp: Extricate checksum calculation from validate_branch()
objtool: Add is_cold_func() helper
objtool: Add is_alias_sym() helper
objtool/klp: Handle Clang .data..Lanon anonymous data sections
objtool/klp: Create empty checksum sections for function-less object files
objtool: Include libsubcmd headers directly from source tree
...
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gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"Futex updates:
- Optimize futex hash bucket access patterns (Peter Zijlstra)
- Large series to address the robust futex unlock race for real, by
Thomas Gleixner:
"The robust futex unlock mechanism is racy in respect to the
clearing of the robust_list_head::list_op_pending pointer because
unlock and clearing the pointer are not atomic.
The race window is between the unlock and clearing the pending op
pointer. If the task is forced to exit in this window, exit will
access a potentially invalid pending op pointer when cleaning up
the robust list.
That happens if another task manages to unmap the object
containing the lock before the cleanup, which results in an UAF.
In the worst case this UAF can lead to memory corruption when
unrelated content has been mapped to the same address by the time
the access happens.
User space can't solve this problem without help from the kernel.
This series provides the kernel side infrastructure to help it
along:
1) Combined unlock, pointer clearing, wake-up for the
contended case
2) VDSO based unlock and pointer clearing helpers with a
fix-up function in the kernel when user space was interrupted
within the critical section.
... with help by André Almeida:
- Add a note about robust list race condition (André Almeida)
- Add self-tests for robust release operations (André Almeida)
Context analysis updates:
- Implement context analysis for 'struct rt_mutex'. (Bart Van Assche)
- Bump required Clang version to 23 (Marco Elver)
Guard infrastructure updates:
- Series to remove NULL check from unconditional guards (Dmitry
Ilvokhin)
Lockdep updates:
- Restore self-test migrate_disable() and sched_rt_mutex state on
PREEMPT_RT (Karl Mehltretter)
Membarriers updates:
- Use per-CPU mutexes for targeted commands (Aniket Gattani)
- Modernize membarrier_global_expedited with cleanup guards (Aniket
Gattani)
- Add rseq stress test for CFS throttle interactions (Aniket Gattani)
percpu-rwsems updates:
- Extract __percpu_up_read() to optimize inlining overhead (Dmitry
Ilvokhin)
Seqlocks updates:
- Allow UBSAN_ALIGNMENT to fail optimizing (Heiko Carstens)
Lock tracing:
- Add contended_release tracepoint to sleepable locks such as
mutexes, percpu-rwsems, rtmutexes, rwsems and semaphores (Dmitry
Ilvokhin)
MAINTAINERS updates:
- MAINTAINERS: Add RUST [SYNC] entry (Boqun Feng)
Misc updates and fixes by Randy Dunlap, YE WEI-HONG, Fabricio Parra,
Dmitry Ilvokhin and Peter Zijlstra"
* tag 'locking-core-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (36 commits)
locking: Add contended_release tracepoint to sleepable locks
locking/percpu-rwsem: Extract __percpu_up_read()
tracing/lock: Remove unnecessary linux/sched.h include
futex: Optimize futex hash bucket access patterns
rust: sync: completion: Mark inline complete_all and wait_for_completion
MAINTAINERS: Add RUST [SYNC] entry
cleanup: Specify nonnull argument index
selftests: futex: Add tests for robust release operations
Documentation: futex: Add a note about robust list race condition
x86/vdso: Implement __vdso_futex_robust_try_unlock()
x86/vdso: Prepare for robust futex unlock support
futex: Provide infrastructure to plug the non contended robust futex unlock race
futex: Add robust futex unlock IP range
futex: Add support for unlocking robust futexes
futex: Cleanup UAPI defines
x86: Select ARCH_MEMORY_ORDER_TSO
uaccess: Provide unsafe_atomic_store_release_user()
futex: Provide UABI defines for robust list entry modifiers
futex: Move futex related mm_struct data into a struct
futex: Make futex_mm_init() void
...
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gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip
Pull vdso updates from Thomas Gleixner:
- Remove the redundant CONFIG_GENERIC_TIME_VSYSCALL after converting
the remaining users over.
- Rework and sanitize the MIPS VDSO handling, so it does not handle the
time related VDSO if there is no VDSO capable clocksource available.
Also stop mapping VDSO data pages unconditionally even if there is no
usage possible.
* tag 'timers-vdso-2026-06-13' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip:
MIPS: VDSO: Fold MIPS_CLOCK_VSYSCALL into MIPS_GENERIC_GETTIMEOFDAY
MIPS: VDSO: Gate microMIPS restriction on GCC version
MIPS: VDSO: Fold MIPS_DISABLE_VDSO into MIPS_GENERIC_GETTIMEOFDAY
clocksource/drivers/mips-gic-timer: Only use VDSO_CLOCKMODE_GIC when it is a available
MIPS: csrc-r4k: Only use VDSO_CLOCKMODE_R4K when it is a available
MIPS: VDSO: Only map the data pages when the vDSO is used
MIPS: Introduce Kconfig MIPS_GENERIC_GETTIMEOFDAY
vdso/datastore: Always provide symbol declarations
MAINTAINERS: Add include/linux/vdso_datastore.h to vDSO block
vdso/gettimeofday: Rename __arch_get_vdso_u_timens_data()
vdso/treewide: Drop GENERIC_TIME_VSYSCALL
vdso/vsyscall: Gate update_vsyscall() behind CONFIG_GENERIC_GETTIMEOFDAY
riscv: vdso: Drop CONFIG_GENERIC_TIME_VSYSCALL guard around syscall fallbacks
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull misc vfs updates from Christian Brauner:
"Features:
- Reduce pipe->mutex contention by pre-allocating pages outside the
lock in anon_pipe_write().
anon_pipe_write() called alloc_page() once per page while holding
pipe->mutex. The allocation can sleep doing direct reclaim and runs
memcg charging, which extends the critical section and stalls any
concurrent reader on the same mutex. Now up to 8 pages are
pre-allocated before the mutex is taken, leftovers are recycled
into the per-pipe tmp_page[] cache before unlock, and any remainder
is released after unlock, keeping the allocator out of the critical
section on both sides. On a writers x readers sweep with 64KB
writes against a 1 MB pipe throughput improves 6-28% and average
write latency drops 5-22%; under memory pressure - when the cost of
holding the mutex across reclaim is highest - throughput improves
21-48% and latency drops 17-33%. The microbenchmark is added to
selftests.
- uaccess/sockptr: fix the ignored_trailing logic in
copy_struct_to_user() to behave as documented and the usize check
in copy_struct_from_sockptr() for user pointers, and add
copy_struct_{from,to}_bounce_buffer() and copy_struct_to_sockptr()
helpers for upcoming users (IPPROTO_SMBDIRECT, IPPROTO_QUIC).
- bpf: add a sleepable bpf_real_inode() kfunc that resolves the real
inode backing a dentry via d_real_inode(). On overlayfs the inode
attached to the dentry doesn't carry the underlying device
information; this is used by the filesystem restriction BPF program
that was merged into systemd.
- docs: add guidelines for submitting new filesystems, motivated by
the maintenance burden abandoned and untestable filesystems impose
on VFS developers, blocking infrastructure work like folio
conversions and iomap migration.
Fixes:
- libfs: set SB_I_NOEXEC and SB_I_NODEV by default in init_pseudo()
and drop the now-redundant assignments in callers. This began as a
one-line dma-buf fix for a path_noexec() warning; a pseudo
filesystem has no reason not to set SB_I_NOEXEC. All init_pseudo()
callers were audited: the only visible effect is on dma-buf where
SB_I_NOEXEC silences the warning.
- Handle set_blocksize() failures in legacy filesystems (bfs, hpfs,
qnx4, jfs, befs, affs, isofs, minix, ntfs3, omfs). Mounting a
device with a sector size > PAGE_SIZE crashed roughly half of them;
the rest had the same missing error handling pattern. Plus a
follow-up releasing the superblock buffer_head when setting the
minix v3 block size fails.
- mount: honour SB_NOUSER in the new mount API.
- fs/fcntl: fix a SOFTIRQ-unsafe lock order in fasync signaling by
switching the process-group paths of send_sigio() and send_sigurg()
from read_lock(&tasklist_lock) to RCU, matching the single-PID
path.
- vfs: add an FS_USERNS_DELEGATABLE flag and set it for NFS, fixing
delegated NFS mounts (fsopen() in a container with the mount
performed by a privileged daemon) that broke when non-init
s_user_ns was tied to FS_USERNS_MOUNT.
- selftests/namespaces: fix a hang in nsid_test where an unreaped
grandchild kept the TAP pipe write-end open, a waitpid(-1) race in
listns_efault_test, and a false FAIL on kernels without listns()
where the tests should SKIP.
- filelock: fix the break_lease() stub signature for
CONFIG_FILE_LOCKING=n.
- init/initramfs_test: wait for the async initramfs unpacking before
running; the test and do_populate_rootfs() share the parser state.
- fs/coredump: reduce redundant log noise in
validate_coredump_safety().
- iomap: pass the correct length to fserror_report_io() in
__iomap_write_begin().
- backing-file: fix the backing_file_open() kerneldoc.
Cleanups:
- initramfs: refactor the cpio hex header parsing to use hex2bin()
instead of the hand-rolled simple_strntoul() which is reverted, and
extend the initramfs KUnit tests to cover header fields with 0x
prefixes.
- Replace __get_free_pages() and friends with kmalloc()/kzalloc()
across quota, proc, ocfs2/dlm, nilfs2, nfs, nfsd, libfs, jfs, jbd2,
isofs, fuse, select, namespace, configfs, binfmt_misc, bfs, and the
do_mounts init code - part of the larger work of replacing page
allocator calls with kmalloc().
- Use clear_and_wake_up_bit() in unlock_buffer() and
journal_end_buffer_io_sync() instead of open-coding the sequence.
- Drop unused VFS exports: unexport drop_super_exclusive(), remove
start_removing_user_path_at(), and fold __start_removing_path()
into start_removing_path().
- fs/read_write: narrow the __kernel_write() export with
EXPORT_SYMBOL_FOR_MODULES().
- vfs: uapi: retire octal and hex constants in favor of (1 << n) for
the O_ flags. Finding a free bit for a new flag across the
architectures was needlessly hard with the mixed bases.
- dcache: add extra sanity checks of dead dentries in dentry_free()
via a new DENTRY_WARN_ONCE() that also prints d_flags.
- iov_iter: use kmemdup_array() in dup_iter() to harden the
allocation against multiplication overflow.
- fs/pipe: write to ->poll_usage only once.
- vfs: remove an always-taken if-branch in find_next_fd().
- dcache: use kmalloc_flex() for struct external_name in __d_alloc().
- namei: use QSTR() instead of QSTR_INIT() in path_pts().
- sync_file_range: delete dead S_ISLNK code.
- Comment fixes: retire a stale comment in fget_task_next() and fix
assorted spelling mistakes"
* tag 'vfs-7.2-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (73 commits)
backing-file: fix backing_file_open() kerneldoc parameter
iomap: pass the correct len to fserror_report_io in __iomap_write_begin
vfs: add FS_USERNS_DELEGATABLE flag and set it for NFS
filelock: fix break_lease() stub signature for CONFIG_FILE_LOCKING=n
vfs: uapi: retire octal and hex numbers in favor of (1 << n) for O_ flags
bpf: add bpf_real_inode() kfunc
fs/read_write: Do not export __kernel_write() to the entire world
libfs: drop redundant SB_I_NOEXEC/SB_I_NODEV in init_pseudo() callers
libfs: set SB_I_NOEXEC and SB_I_NODEV by default in init_pseudo()
mount: honour SB_NOUSER in the new mount API
fs/fcntl: fix SOFTIRQ-unsafe lock order in fasync signaling
selftests/pipe: add pipe_bench microbenchmark
fs/pipe: pre-allocate pages outside pipe->mutex in anon_pipe_write
fs: retire stale comment in fget_task_next()
fs: fix spelling mistakes in comment
bfs: replace get_zeroed_page() with kzalloc()
binfmt_misc: replace __get_free_page() with kmalloc()
configfs: replace __get_free_pages() with kzalloc()
fs/namespace: use __getname() to allocate mntpath buffer
fs/select: replace __get_free_page() with kmalloc()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull misc kernel updates from Christian Brauner:
"Fixes
- rhashtable: give each instance its own lockdep class
syzbot reported a circular locking dependency between ht->mutex and
fs_reclaim via the simple_xattrs rhashtable being torn down during
inode eviction.
The predicted deadlock cannot occur: rhashtable_free_and_destroy()
cancels the deferred worker before taking ht->mutex and
acquisitions on distinct rhashtables are on distinct mutexes.
Lockdep flags a cycle anyway because every ht->mutex in the kernel
shared the single static lockdep class from
rhashtable_init_noprof().
The lockdep key is lifted to a per-call-site static key so every
rhashtable instance gets its own class.
- selftests/clone3: fix misuse of the libcap library interface in the
cap_checkpoint_restore test and remove unused variables
- selftests/pid_namespace: compute the pid_max test limits
dynamically instead of hardcoding values below the kernel-enforced
minimum of PIDS_PER_CPU_MIN * num_possible_cpus() which made the
tests fail on machines with many possible CPUs
- selftests: fix the Makefile TARGETS entry for nsfs which wasn't
adjusted when the tests moved under filesystems/
Cleanups
- ipc/sem.c: use unsigned int for nsops to match the declaration in
syscalls.h"
* tag 'kernel-7.2-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
selftests/clone3: remove unused variables
selftests/clone3: fix libcap interface usage
ipc/sem.c: use unsigned int for nsops
selftests: Fix Makefile target for nsfs
rhashtable: give each instance its own lockdep class
selftests/pid_namespace: compute pid_max test limits dynamically
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull debugobjects fix from Ingo Molnar:
- Fix potential debugobjects deadlock on PREEMPT_RT kernels (Waiman
Long)
* tag 'core-urgent-2026-06-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
debugobjects: Don't call fill_pool() in early boot hardirq context
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Some of the (ABI aware) code needs an upper case when printing MAC
addresses. Introduce an extension for that into the existing %p[mM].
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://patch.msgid.link/20260603104351.152085-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
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During randconfig testing, I came across a lot of warnings for the newly
added carryless multiplication function triggering excessive stack usage
from spilling temporary variables to the stack:
lib/crypto/gf128hash.c:166:1: error: stack frame size (1192) exceeds limit (1024) in 'polyval_mul_generic' [-Werror,-Wframe-larger-than]
In addition to the possible risk of overflowing the kernel stack,
the generated object code surely performs very poorly.
This only happens on architectures that don't provide uint128_t
(which should be all 32-bit architectures on modern compilers), but
though I tested random x86 and arm configs, I only saw this with arm's
CONFIG_THUMB2_KERNEL, which adds more pressure to the register allocator.
The testing was done using clang-22, I don't know if gcc has the same
problem. Marking clmul32() as noinline_for_stack experimentally shows
all of the affected builds to completely solve the problem, reducing
the stack usage to a few bytes as expected.
Since u64 arithmetic frequently leads to compilers badly optimizing
32-bit targets, keeping clmul32 out of line is likely to help on
other 32-bit configurations as well when they run into this problem,
though it may also result in a small performance degradation in
configurations that would benefit from inlining.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260611125952.3387258-1-arnd@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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The batched into_buf test path allocates TEST_FIRMWARE_BUF_SIZE bytes
unconditionally, but then passes test_fw_config->buf_size to
request_firmware_into_buf() or request_partial_firmware_into_buf().
Userspace can set config_buf_size above TEST_FIRMWARE_BUF_SIZE before
triggering a batched request. If the firmware file is large enough, the
firmware loader writes past the end of the 1 KiB test buffer.
Allocate the buffer with the same size that the test passes to the firmware
API so config_buf_size remains the actual buffer size under test.
Assisted-by: Codex:gpt-5.5-cyber-preview
Link: https://lore.kernel.org/20260605003038.2005840-1-sam.moelius@trailofbits.com
Signed-off-by: Samuel Moelius <sam.moelius@trailofbits.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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The text display code used in the Risc PC kernel image decompression
code uses arch/arm/boot/compressed/font.c, which includes
lib/fonts/font_acorn_8x8.c, which further includes <linux/font.h>.
Since commit 97df8960240a ("lib/fonts: Provide helpers for calculating
glyph pitch and size") <linux/font.h> contains inline functions that
require __do_div64, which is not linked into the ARM kernel
decompressor. This makes Risc PC zImages fail to build.
Resolve this issue by defining the BOOTLOADER symbol and use it to avoid
a static declaration of the acorndata_8x8 symbol. That way it can be
referenced by the arm bootloader, and other static math functions and
symbols (like __do_div64) stay static and don't get unneccesary included
in the ARM kernel bootloader decompressor object file.
Fixes: 97df8960240a ("lib/fonts: Provide helpers for calculating glyph pitch and size")
Reported-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Helge Deller <deller@gmx.de>
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Check alloc_page_vma() return status for page allocation failures, free
allocated pages and return VM_FAULT_OOM on error.
Handle return codes of dmirror_devmem_fault_alloc_and_copy(), call
migrate_vma_finalize() to remove migration entries from
migrate_vma_setup().
Link: https://lore.kernel.org/20260521021858.21511-1-liuqiangneo@163.com
Signed-off-by: Qiang Liu <liuqiang@kylinos.cn>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
[akpm@linux-foundation.org: fix dmirror_devmem_fault_alloc_and_copy() retval handling]
Link: https://lore.kernel.org/oe-kbuild-all/202606011329.zWs2BKy4-lkp@intel.com/
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Move the kvcalloc() calls after the early return checks to avoid leaking
src_pfns and dst_pfns when end < start or mmget_not_zero() fails.
Link: https://lore.kernel.org/20260528011336.20797-1-hao.ge@linux.dev
Fixes: 775465fd26a3 ("lib/test_hmm: add zone device private THP test infrastructure")
Signed-off-by: Hao Ge <hao.ge@linux.dev>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Reported-by: Sashiko <sashiko-bot@kernel.org>
Reviewed-by: Balbir Singh <balbirs@nvidia.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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rhashtable.o builds with warnings as rhashtable_next_key() kdoc
from lib/rhashtable.c does not have the arguments descriptions.
Move rhashtable_next_key() kdoc from header to c file, matching
other functions.
Move rhashtable_next_key() next to the other forward declarations
in the header file.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202606061925.WI4bYI8k-lkp@intel.com/
Fixes: 8f4fa9f89b72 ("rhashtable: Add rhashtable_next_key() API")
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Link: https://lore.kernel.org/r/20260606-rhash_fixes_1-v1-1-932ab036e6bc@meta.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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When booting a debug PREEMPT_RT kernel on an ARM64 system, a "inconsistent
{HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage" lockdep warning message was
reported to the console.
During early boot, interrupts are enabled before the scheduler is
enabled. In this window (before SYSTEM_SCHEDULING is set) interrupts can
fire and in the hard interrupt context handler attempt to fill the pool
This can lead to a deadlock when the interrupt occurred when the interrupt
hits a region which holds a lock that is required to be taken in the
allocation path.
Add a new can_fill_pool() helper and reorder the exception rule and forbid
this scenario by excluding allocations from hard interrupt context.
Fixes: 06e0ae988f6e ("debugobjects: Allow to refill the pool before SYSTEM_SCHEDULING")
Suggested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260605173038.495075-1-longman@redhat.com
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Insert n elements, then verify:
- NULL prev_key walks from the beginning, visiting all n
- non-existing prev_key returns ERR_PTR(-ENOENT)
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/20260605-rhash-v7-2-5b8e05f8630d@meta.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Introduce a simpler iteration mechanism for rhashtable that lets
the caller continue from an arbitrary position by supplying the
previous key, without the per-iterator state of the
rhashtable_walk_* API.
void *rhashtable_next_key(struct rhashtable *ht,
const void *prev_key);
Caller holds RCU; passes NULL prev_key for the first element or
the previously returned key to advance. Walks tbl->future_tbl
chain so in-flight rehashes are observed.
Best-effort: in case of concurrent resize, provides no guarantees:
- may produce duplicate elements
- may skip any amount of elements
- termination of the loop is not guaranteed in case of
sustained rehash. Callers are advised to bound loop externally
or avoid inserting new elements during such loop.
Returns ERR_PTR(-ENOENT) if prev_key is not found.
Behavior on tables with duplicate keys is undefined.
rhltable is not supported — returns ERR_PTR(-EOPNOTSUPP).
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/20260605-rhash-v7-1-5b8e05f8630d@meta.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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raid6_select_algo() allocates 8 pages for buffer that is used
as a scratch area for selection of the best algorithm.
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 than ancient __get_free_pages().
kmalloc() does not require ugly casts and kfree() does not need to know the
size of the freed object.
There is no performance difference because kmalloc() redirects allocations
of such size to the page allocator.
Replace __get_free_pages() call with kmalloc().
Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Link: https://lore.kernel.org/20260528-lib-v4-2-4e3ad1277279@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Hannes Reinecke <hare@kernel.org>
Cc: Li Nan <linan122@huawei.com>
Cc: Song Liu <song@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Patch series "lib/raid: replace __get_free_pages() call with kmalloc()", v4.
The xor benchmark allocates 4 pages for a scratch buffer that is used
purely as a CPU-only XOR working area.
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 than ancient __get_free_pages().
kmalloc() does not require ugly casts and kfree() does not need to know
the size of the freed object.
There is no performance difference because kmalloc() redirects allocations
of such size to the page allocator.
Replace __get_free_pages() call with kmalloc().
This patch (of 2):
The xor benchmark allocates 4 pages for a scratch buffer that is used
purely as a CPU-only XOR working area.
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 than ancient __get_free_pages().
kmalloc() does not require ugly casts and kfree() does not need to know the
size of the freed object.
There is no performance difference because kmalloc() redirects allocations
of such size to the page allocator.
Replace __get_free_pages() call with kmalloc().
Link: https://lore.kernel.org/20260528-lib-v4-0-4e3ad1277279@kernel.org
Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Link: https://lore.kernel.org/20260528-lib-v4-1-4e3ad1277279@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Li Nan <linan122@huawei.com>
Cc: Song Liu <song@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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alloc_pages_bulk() is not guaranteed to return all requested pages in a
single call.
Call it repeatedly until all pages have been allocated or no more progress
is being made.
Link: https://lore.kernel.org/20260526-kunit_iov_iter-alloc_bulk-v2-1-24fbcd995c61@weissschuh.net
Fixes: 2d71340ff1d4 ("iov_iter: Kunit tests for copying to/from an iterator")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Cc: "Christian A. Ehrhardt" <lk@c--e.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Originally this function was supposed to work the same way as
__arch_get_vdso_u_time_data() and be overridden on some architectures.
However the actually used implementation, which just adds PAGE_SIZE, does
not need this override mechanism.
Adjust the name to reflect the true nature of the function.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260519-vdso-arch_get_vdso_u_timens_data-v1-1-43f0d62716e8@linutronix.de
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The kmem_cache_alloc_bulk return value is weird. It returns the number
of allocated objects, but that must always be 0 or the requested number
based on the implementations and the handling in the callers, but that
assumption is not actually documented anywhere, which confuses automated
review tools.
Fix this by returning a bool if the allocation succeeded and adding a
kerneldoc comment explaining the API.
[rob.clark@oss.qualcomm.com: fixups in
msm_iommu_pagetable_prealloc_allocate() ]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com> # skbuff
Link: https://patch.msgid.link/20260528093437.2519248-2-hch@lst.de
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
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