Josh Poimboeuf fc0bb9915b objtool: Grow __cfi_* prefix symbols for all CFI+CALL_PADDING ...

For all CONFIG_CFI+CONFIG_CALL_PADDING configs, for C functions, the
__cfi_ symbols only cover the 5-byte kCFI type hash.  After that there
also N bytes of NOP padding between the hash and the function entry
which aren't associated with any symbol.

The NOPs can be replaced with actual code at runtime.  Without a symbol,
unwinders and tooling have no way of knowing where those bytes belong.

Grow the existing __cfi_* symbols to fill that gap.

Note that assembly functions with SYM_TYPED_FUNC_START() aren't affected
by this issue, their __cfi_ symbols also cover the padding.

Also, CONFIG_PREFIX_SYMBOLS has no reason to exist: CONFIG_CALL_PADDING
is what causes the compiler to emit NOP padding before function entry
(via -fpatchable-function-entry), so it's the right condition for
creating prefix symbols.

Remove CONFIG_PREFIX_SYMBOLS, as it's no longer needed.  Simplify the
LONGEST_SYM_KUNIT_TEST dependency accordingly.  Rework objtool's
arguments a bit to handle the variety of prefix/cfi-related cases.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

2026-05-04 21:16:07 -07:00

..

842

…

crc

Merge tag 'loongarch-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

2026-04-24 09:54:45 -07:00

crypto

Merge tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux

2026-04-21 11:46:22 -07:00

dim

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

fonts

lib/fonts: Implement font rotation

2026-04-07 17:38:07 +02:00

kunit

kunit: reduce stack usage in kunit_run_tests()

2026-03-02 10:11:06 -07:00

lz4

…

lzo

lib/lzo: add unlikely hints to overrun checks

2025-08-16 17:24:31 +08:00

math

Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-16 20:11:56 -07:00

pldmfw

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

raid

xor: add a kunit test case

2026-04-02 23:36:22 -07:00

raid6

Merge tag 'riscv-for-linus-6.19-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2025-12-05 16:26:57 -08:00

reed_solomon

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_fortify

fortify: Cleanup temp file also on non-successful exit

2026-01-14 19:49:55 -08:00

tests

Merge tag 'riscv-for-linus-7.1-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2026-04-24 10:00:37 -07:00

vdso

mm: rename zap_vma_pages() to zap_vma()

2026-04-05 13:53:14 -07:00

xz

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

zlib_deflate

…

zlib_dfltcc

…

zlib_inflate

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

zstd

…

.gitignore

…

alloc_tag.c

mm/alloc_tag: clear codetag for pages allocated before page_ext initialization

2026-04-18 00:10:50 -07:00

argv_split.c

…

ashldi3.c

…

ashrdi3.c

…

asn1_decoder.c

…

asn1_encoder.c

…

assoc_array.c

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-21 20:03:00 -08:00

atomic64_test.c

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atomic64.c

…

audit.c

audit: fix coding style issues

2026-03-05 22:16:08 -05:00

base64.c

lib/base64: rework encode/decode for speed and stricter validation

2025-11-20 14:03:44 -08:00

bcd.c

…

bch.c

lib/bch: fix signed shift overflow in build_mod8_tables

2026-03-27 21:19:48 -07:00

bitmap-str.c

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bitmap.c

bitmap: introduce bitmap_weighted_xor()

2026-04-01 20:03:07 -04:00

bitrev.c

…

bootconfig-data.S

…

bootconfig.c

Merge tag 'memblock-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock

2026-04-18 11:29:14 -07:00

bsearch.c

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btree.c

btree: simplify merge logic by using btree_last() return value

2025-09-13 17:32:53 -07:00

bucket_locks.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

bug.c

Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-16 20:11:56 -07:00

build_OID_registry

oid_registry: allow arbitrary size OIDs

2026-01-20 19:44:15 -08:00

buildid.c

procfs: avoid fetching build ID while holding VMA lock

2026-02-05 14:10:00 -08:00

bust_spinlocks.c

…

cache_maint.c

lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION

2025-11-21 18:42:01 +00:00

check_signature.c

…

checksum.c

…

closure.c

…

clz_ctz.c

bitops: Add __attribute_const__ to generic ffs()-family implementations

2025-09-08 14:58:50 -07:00

clz_tab.c

…

cmdline.c

…

cmpdi2.c

…

cmpxchg-emu.c

…

codetag.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

compat_audit.c

…

cpu_rmap.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

cpumask.c

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ctype.c

…

debug_info.c

…

debug_locks.c

…

debugobjects.c

debugobjects: Drop likely() around !IS_ERR_OR_NULL()

2026-03-25 18:07:39 +01:00

dec_and_lock.c

compiler-context-analysis: Remove __cond_lock() function-like helper

2026-01-05 16:43:33 +01:00

decompress_bunzip2.c

lib: decompress_bunzip2: fix 32-bit shift undefined behavior

2026-03-27 21:19:43 -07:00

decompress_inflate.c

…

decompress_unlz4.c

…

decompress_unlzma.c

…

decompress_unlzo.c

…

decompress_unxz.c

xz: fix arm fdt compile error for kmalloc replacement

2026-02-22 12:05:31 -08:00

decompress_unzstd.c

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decompress.c

lib/decompress: use designated initializers for struct compress_format

2025-09-22 20:10:58 -07:00

devmem_is_allowed.c

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devres.c

…

dhry_1.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

dhry_2.c

…

dhry_run.c

…

dhry.h

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digsig.c

Merge tag 'integrity-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity

2025-10-05 10:48:33 -07:00

dump_stack.c

panic/printk: replace this_cpu_in_panic() with panic_on_this_cpu()

2025-09-13 17:32:52 -07:00

dynamic_debug.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

dynamic_queue_limits.c

…

earlycpio.c

…

errname.c

…

error-inject.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

errseq.c

…

extable.c

…

fault-inject-usercopy.c

lib/fault-inject-usercopy.c: use PTR_ERR_OR_ZERO() to simplify code

2025-09-13 17:32:46 -07:00

fault-inject.c

…

fdt_addresses.c

…

fdt_empty_tree.c

…

fdt_ro.c

…

fdt_rw.c

…

fdt_strerror.c

…

fdt_sw.c

…

fdt_wip.c

…

fdt.c

…

find_bit_benchmark_rust.rs

rust: add find_bit_benchmark_rust module.

2025-09-22 15:52:44 -04:00

find_bit_benchmark.c

lib/find_bit_benchmark: avoid clearing randomly filled bitmap in test_find_first_bit()

2026-03-23 13:33:51 -04:00

find_bit.c

bitmap: drop __find_nth_andnot_bit()

2026-03-23 13:33:51 -04:00

flex_proportions.c

flex_proportions: make fprop_new_period() hardirq safe

2026-01-26 19:03:46 -08:00

fw_table.c

…

genalloc.c

lib/genalloc: fix device leak in of_gen_pool_get()

2025-09-28 11:36:13 -07:00

generic-radix-tree.c

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glob.c

lib/glob: initialize back_str to silence uninitialized variable warning

2026-03-27 21:19:45 -07:00

group_cpus.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

hexdump.c

kernel.h: drop hex.h and update all hex.h users

2026-01-20 19:44:19 -08:00

hweight.c

bitops: Update kernel-doc in hweight.c to fix the issues with it

2025-11-06 11:51:04 -05:00

idr.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

inflate.c

lib/inflate: fix typo "This results" to "The results" in comment

2026-03-27 21:19:42 -07:00

interval_tree_test.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

interval_tree.c

interval_tree: Fix ITSTATIC usage for *_subtree_search()

2025-10-14 14:45:22 -07:00

iomap_copy.c

…

iomap.c

…

iomem_copy.c

…

iommu-helper.c

…

iov_iter.c

Merge branch 'nocache-cleanup'

2026-04-13 08:39:51 -07:00

irq_poll.c

…

irq_regs.c

…

is_single_threaded.c

…

kasprintf.c

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Kconfig

xor: move to lib/raid/

2026-04-02 23:36:16 -07:00

Kconfig.debug

objtool: Grow __cfi_* prefix symbols for all CFI+CALL_PADDING

2026-05-04 21:16:07 -07:00

Kconfig.kasan

kasan: introduce ARCH_DEFER_KASAN and unify static key across modes

2025-09-21 14:21:58 -07:00

Kconfig.kcsan

objtool: Drop noinstr hack for KCSAN_WEAK_MEMORY

2025-08-28 16:58:46 -07:00

Kconfig.kfence

…

Kconfig.kgdb

…

Kconfig.kmsan

KMSAN: Restore dynamic check for '-fsanitize=kernel-memory'

2025-10-27 16:22:02 -07:00

Kconfig.ubsan

Kconfig.ubsan: Remove CONFIG_UBSAN_REPORT_FULL from documentation

2026-01-07 12:16:03 -08:00

kfifo.c

kfifo: fix kmalloc_array_node() argument order

2026-01-26 19:07:09 -08:00

klist.c

…

kobject_uevent.c

kernfs: pass struct ns_common instead of const void * for namespace tags

2026-04-09 14:36:52 +02:00

kobject.c

kernfs: pass struct ns_common instead of const void * for namespace tags

2026-04-09 14:36:52 +02:00

kstrtox.c

lib/kstrtox: fix kstrtobool() docstring to mention enabled/disabled

2026-01-26 19:07:10 -08:00

kstrtox.h

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linear_ranges.c

lib/linear_ranges: Add linear_range_get_selector_high_array

2026-03-30 16:58:33 +02:00

list_debug.c

…

list_sort.c

lib/list_sort: remove dummy cmp() calls to speed up merge_final()

2026-04-02 23:36:22 -07:00

llist.c

…

locking-selftest-hardirq.h

…

locking-selftest-mutex.h

…

locking-selftest-rlock-hardirq.h

…

locking-selftest-rlock-softirq.h

…

locking-selftest-rlock.h

…

locking-selftest-rsem.h

…

locking-selftest-rtmutex.h

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locking-selftest-softirq.h

…

locking-selftest-spin-hardirq.h

…

locking-selftest-spin-softirq.h

…

locking-selftest-spin.h

…

locking-selftest-wlock-hardirq.h

…

locking-selftest-wlock-softirq.h

…

locking-selftest-wlock.h

…

locking-selftest-wsem.h

…

locking-selftest.c

treewide: Remove in_irq()

2025-10-24 21:39:27 +02:00

lockref.c

compiler-context-analysis: Remove __cond_lock() function-like helper

2026-01-05 16:43:33 +01:00

logic_iomem.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

logic_pio.c

…

lru_cache.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

lshrdi3.c

…

lwq.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

Makefile

Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-16 20:11:56 -07:00

maple_tree.c

MAINTAINERS: update Liam's email address

2026-04-27 05:54:25 -07:00

memcat_p.c

…

memory-notifier-error-inject.c

…

memregion.c

…

memweight.c

…

min_heap.c

…

muldi3.c

…

net_utils.c

…

netdev-notifier-error-inject.c

…

nlattr.c

…

nmi_backtrace.c

…

notifier-error-inject.c

…

notifier-error-inject.h

…

objagg.c

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22 08:26:33 -08:00

objpool.c

objpool: fix the overestimation of object pooling metadata size

2026-02-12 15:45:57 -08:00

of-reconfig-notifier-error-inject.c

…

oid_registry.c

…

once.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

packing_test.c

…

packing.c

…

parman.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

parser.c

lib: parser: fix match_wildcard to correctly handle trailing stars

2026-04-02 23:36:24 -07:00

percpu_counter.c

…

percpu_test.c

…

percpu-refcount.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

plist.c

treewide: Update email address

2026-01-11 06:09:11 -10:00

pm-notifier-error-inject.c

…

radix-tree.c

…

radix-tree.h

…

random32.c

…

ratelimit.c

lib: ratelimit: fix spelling mistake 'seperately'

2025-11-20 14:03:45 -08:00

rbtree_test.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

rbtree.c

rbtree: Provide rbtree with links

2026-02-27 16:40:16 +01:00

rcuref.c

…

ref_tracker.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

refcount.c

…

rhashtable.c

rhashtable: Bounce deferred worker kick through irq_work

2026-04-20 20:10:50 -10:00

sbitmap.c

lib/sbitmap: make sbitmap_get_shallow() internal

2025-08-07 06:30:17 -06:00

scatterlist.c

lib/scatterlist: fix temp buffer in extract_user_to_sg()

2026-04-02 23:36:23 -07:00

seq_buf.c

…

sg_pool.c

…

sg_split.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

siphash.c

…

smp_processor_id.c

…

sort.c

…

stackdepot.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

stmp_device.c

…

string_helpers.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

string.c

…

strncpy_from_user.c

lib/strn*,uaccess: Use masked_user_{read/write}_access_begin when required

2025-11-18 15:27:35 +01:00

strnlen_user.c

lib/strn*,uaccess: Use masked_user_{read/write}_access_begin when required

2025-11-18 15:27:35 +01:00

sys_info.c

sys_info: add a default kernel sys_info mask

2025-11-20 14:03:43 -08:00

syscall.c

…

test_bitmap.c

bitmap: add test_zero_nbits()

2026-03-24 13:39:53 -04:00

test_bitops.c

…

test_bpf.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_context-analysis.c

compiler: Simplify generic RELOC_HIDE()

2026-03-24 15:08:05 +01:00

test_debug_virtual.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_dynamic_debug.c

…

test_firmware.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_fpu_glue.c

…

test_fpu_impl.c

…

test_fpu.h

…

test_free_pages.c

…

test_hexdump.c

…

test_hmm_uapi.h

lib/test_hmm: add large page allocation failure testing

2025-11-24 15:08:48 -08:00

test_hmm.c

lib: test_hmm: implement a device release method

2026-04-18 00:10:52 -07:00

test_ida.c

…

test_kho.c

kho: persist blob size in KHO FDT

2026-04-18 00:10:48 -07:00

test_kmod.c

…

test_lockup.c

…

test_maple_tree.c

MAINTAINERS: update Liam's email address

2026-04-27 05:54:25 -07:00

test_memcat_p.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_meminit.c

…

test_module.c

…

test_objagg.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_objpool.c

lib: test_objpool: Avoid direct access to hrtimer clockbase

2025-09-09 12:27:18 +02:00

test_parman.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_ref_tracker.c

…

test_rhashtable.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_static_key_base.c

…

test_static_keys.c

…

test_sysctl.c

…

test_ubsan.c

…

test_vmalloc.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

test_workqueue.c

workqueue: avoid unguarded 64-bit division

2026-04-03 07:14:24 -10:00

test_xarray.c

…

test-kstrtox.c

…

textsearch.c

…

timerqueue.c

timerqueue: Provide linked timerqueue

2026-02-27 16:40:16 +01:00

trace_readwrite.c

…

ts_bm.c

lib/ts_bm: fix integer overflow in pattern length calculation

2026-03-27 21:19:44 -07:00

ts_fsm.c

…

ts_kmp.c

lib/ts_kmp: fix integer overflow in pattern length calculation

2026-03-27 21:19:44 -07:00

ubsan.c

ubsan: Fix incorrect hand-side used in handle

2025-08-25 06:11:06 -07:00

ubsan.h

…

ucmpdi2.c

…

ucs2_string.c

…

union_find.c

…

usercopy.c

uaccess: decouple INLINE_COPY_FROM_USER and CONFIG_RUST

2025-11-12 10:00:16 -08:00

uuid.c

lib/uuid: fix typo "reversion" to "revision" in comment

2026-03-27 21:19:41 -07:00

vsprintf.c

Merge branch 'for-7.1-printf-kunit-build' into for-linus

2026-04-20 13:41:28 +02:00

win_minmax.c

…

xarray.c

xarray: remove redundant __GFP_NOWARN

2025-09-13 16:54:46 -07:00

xxhash.c

lib/xxhash: remove more unused xxh functions

2025-11-12 10:00:17 -08:00