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Message-ID: <Z-xFKa5hiQ5urVwS@gmail.com>
Date: Tue, 1 Apr 2025 21:57:29 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] objtool fixes
Linus,
Please pull the latest objtool/urgent Git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git objtool-urgent-2025-04-01
# HEAD: 7c977393b8277ed319e92e4b598b26598c9d30c0 objtool/loongarch: Add unwind hints in prepare_frametrace()
These are objtool fixes and updates by Josh Poimboeuf, centered
around the fallout from the new CONFIG_OBJTOOL_WERROR=y feature,
which, despite its default-off nature, increased the profile/impact
of objtool warnings:
- Improve error handling and the presentation of warnings/errors.
- Revert the new summary warning line that some test-bot tools
interpreted as new regressions.
- Fix a number of objtool warnings in various drivers, core kernel
code and architecture code. About half of them are potential
problems related to out-of-bounds accesses or potential undefined
behavior, the other half are additional objtool annotations.
- Update objtool to latest (known) compiler quirks and
objtool bugs triggered by compiler code generation
- Misc fixes
Thanks,
Ingo
------------------>
David Laight (1):
objtool: Fix verbose disassembly if CROSS_COMPILE isn't set
Josh Poimboeuf (35):
objtool: Fix detection of consecutive jump tables on Clang 20
objtool: Warn when disabling unreachable warnings
objtool: Ignore entire functions rather than instructions
objtool: Fix X86_FEATURE_SMAP alternative handling
objtool: Fix CONFIG_OBJTOOL_WERROR for vmlinux.o
objtool: Fix init_module() handling
objtool: Silence more KCOV warnings
objtool: Properly disable uaccess validation
objtool: Improve error handling
objtool: Reduce CONFIG_OBJTOOL_WERROR verbosity
objtool: Fix up some outdated references to ENTRY/ENDPROC
objtool: Remove --no-unreachable for noinstr-only vmlinux.o runs
objtool: Remove redundant opts.noinstr dependency
objtool, spi: amd: Fix out-of-bounds stack access in amd_set_spi_freq()
objtool, nvmet: Fix out-of-bounds stack access in nvmet_ctrl_state_show()
objtool, media: dib8000: Prevent divide-by-zero in dib8000_set_dds()
objtool, panic: Disable SMAP in __stack_chk_fail()
objtool, Input: cyapa - Remove undefined behavior in cyapa_update_fw_store()
objtool, ASoC: codecs: wcd934x: Remove potential undefined behavior in wcd934x_slim_irq_handler()
objtool, regulator: rk808: Remove potential undefined behavior in rk806_set_mode_dcdc()
objtool, lkdtm: Obfuscate the do_nothing() pointer
objtool: Fix NULL printf() '%s' argument in builtin-check.c:save_argv()
objtool: Fix segfault in ignore_unreachable_insn()
objtool: Fix STACK_FRAME_NON_STANDARD for cold subfunctions
objtool, drm/vmwgfx: Don't ignore vmw_send_msg() for ORC
objtool: Silence more KCOV warnings, part 2
objtool: Ignore end-of-section jumps for KCOV/GCOV
objtool: Append "()" to function name in "unexpected end of section" warning
Revert "objtool: Increase per-function WARN_FUNC() rate limit"
objtool: Always fail on fatal errors
objtool: Change "warning:" to "error: " for fatal errors
sched/smt: Always inline sched_smt_active()
context_tracking: Always inline ct_{nmi,irq}_{enter,exit}()
rcu-tasks: Always inline rcu_irq_work_resched()
objtool/loongarch: Add unwind hints in prepare_frametrace()
arch/loongarch/include/asm/stacktrace.h | 3 +
arch/loongarch/include/asm/unwind_hints.h | 10 +-
arch/x86/include/asm/arch_hweight.h | 6 +-
arch/x86/include/asm/smap.h | 23 +-
arch/x86/include/asm/xen/hypercall.h | 6 +-
drivers/gpu/drm/vmwgfx/vmwgfx_msg.c | 2 +-
drivers/input/mouse/cyapa.c | 4 +-
drivers/media/dvb-frontends/dib8000.c | 5 +-
drivers/misc/lkdtm/perms.c | 14 +-
drivers/nvme/target/debugfs.c | 2 +-
drivers/regulator/rk808-regulator.c | 4 +-
drivers/spi/spi-amd.c | 2 +-
include/linux/context_tracking_irq.h | 8 +-
include/linux/linkage.h | 4 -
include/linux/objtool.h | 2 +-
include/linux/rcupdate.h | 2 +-
include/linux/sched/smt.h | 2 +-
kernel/panic.c | 6 +
scripts/Makefile.lib | 4 +-
scripts/Makefile.vmlinux_o | 15 +-
sound/soc/codecs/wcd934x.c | 2 +-
tools/objtool/Documentation/objtool.txt | 10 +-
tools/objtool/arch/loongarch/decode.c | 14 +-
tools/objtool/arch/loongarch/orc.c | 8 +-
tools/objtool/arch/x86/decode.c | 15 +-
tools/objtool/arch/x86/orc.c | 6 +-
tools/objtool/arch/x86/special.c | 38 +-
tools/objtool/builtin-check.c | 132 +++---
tools/objtool/check.c | 647 +++++++++++++++---------------
tools/objtool/elf.c | 156 ++++---
tools/objtool/include/objtool/builtin.h | 6 +-
tools/objtool/include/objtool/check.h | 3 +-
tools/objtool/include/objtool/elf.h | 30 +-
tools/objtool/include/objtool/objtool.h | 2 +-
tools/objtool/include/objtool/special.h | 4 +-
tools/objtool/include/objtool/warn.h | 62 +--
tools/objtool/objtool.c | 15 +-
tools/objtool/orc_dump.c | 30 +-
tools/objtool/special.c | 25 +-
39 files changed, 679 insertions(+), 650 deletions(-)
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