From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- scripts/Makefile.package | 286 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 286 insertions(+) create mode 100644 scripts/Makefile.package (limited to 'scripts/Makefile.package') diff --git a/scripts/Makefile.package b/scripts/Makefile.package new file mode 100644 index 000000000..6d36786ba --- /dev/null +++ b/scripts/Makefile.package @@ -0,0 +1,286 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Makefile for the different targets used to generate full packages of a kernel + +include $(srctree)/scripts/Kbuild.include +include $(srctree)/scripts/Makefile.lib + +# Git +# --------------------------------------------------------------------------- + +filechk_HEAD = git -C $(srctree) rev-parse --verify HEAD 2>/dev/null + +.tmp_HEAD: check-git FORCE + $(call filechk,HEAD) + +PHONY += check-git +check-git: + @if ! $(srctree)/scripts/check-git; then \ + echo >&2 "error: creating source package requires git repository"; \ + false; \ + fi + +git-config-tar.gz = -c tar.tar.gz.command="$(KGZIP)" +git-config-tar.bz2 = -c tar.tar.bz2.command="$(KBZIP2)" +git-config-tar.lzma = -c tar.tar.lzma.command="$(LZMA)" +git-config-tar.xz = -c tar.tar.xz.command="$(XZ)" +git-config-tar.zst = -c tar.tar.zst.command="$(ZSTD)" + +quiet_cmd_archive = ARCHIVE $@ + cmd_archive = git -C $(srctree) $(git-config-tar$(suffix $@)) archive \ + --output=$$(realpath $@) $(archive-args) + +suffix-gzip := .gz +suffix-bzip2 := .bz2 +suffix-lzma := .lzma +suffix-xz := .xz + +# Linux source tarball +# --------------------------------------------------------------------------- + +linux-tarballs := $(addprefix linux, .tar.gz .tar.bz2 .tar.lzma .tar.xz) + +targets += $(linux-tarballs) +$(linux-tarballs): archive-args = --prefix=linux/ $$(cat $<) +$(linux-tarballs): .tmp_HEAD FORCE + $(call if_changed,archive) + +# rpm-pkg srcrpm-pkg binrpm-pkg +# --------------------------------------------------------------------------- + +quiet_cmd_mkspec = GEN $@ + cmd_mkspec = $(srctree)/scripts/package/mkspec $@ + +rpmbuild/SPECS/kernel.spec: FORCE + $(call cmd,mkspec) + +PHONY += rpm-sources +rpm-sources: linux.tar.gz + $(Q)mkdir -p rpmbuild/SOURCES + $(Q)ln -f linux.tar.gz rpmbuild/SOURCES/linux.tar.gz + $(Q)cp $(KCONFIG_CONFIG) rpmbuild/SOURCES/config + $(Q)$(srctree)/scripts/package/gen-diff-patch rpmbuild/SOURCES/diff.patch + +PHONY += rpm-pkg srcrpm-pkg binrpm-pkg + +ifneq ($(CC),$(HOSTCC)) +rpm-no-devel = --without=devel +endif + +rpm-pkg: private build-type := a +srcrpm-pkg: private build-type := s +binrpm-pkg: private build-type := b + +rpm-pkg srcrpm-pkg: rpm-sources +rpm-pkg srcrpm-pkg binrpm-pkg: rpmbuild/SPECS/kernel.spec + +$(strip rpmbuild -b$(build-type) rpmbuild/SPECS/kernel.spec \ + --define='_topdir $(abspath rpmbuild)' \ + $(if $(filter a b, $(build-type)), \ + --target $(UTS_MACHINE)-linux --build-in-place --noprep --define='_smp_mflags %{nil}' \ + $$(rpm -q rpm >/dev/null 2>&1 || echo --nodeps) \ + $(rpm-no-devel)) \ + $(RPMOPTS)) + +# deb-pkg srcdeb-pkg bindeb-pkg +# --------------------------------------------------------------------------- + +KDEB_SOURCE_COMPRESS ?= gzip + +supported-deb-source-compress := gzip bzip2 lzma xz + +PHONY += linux.tar.unsupported-deb-src-compress +linux.tar.unsupported-deb-src-compress: + @echo "error: KDEB_SOURCE_COMPRESS=$(KDEB_SOURCE_COMPRESS) is not supported. The supported values are: $(supported-deb-source-compress)" >&2 + @false + +debian-orig-suffix := \ + $(strip $(if $(filter $(supported-deb-source-compress), $(KDEB_SOURCE_COMPRESS)), \ + $(suffix-$(KDEB_SOURCE_COMPRESS)),.unsupported-deb-src-compress)) + +quiet_cmd_debianize = GEN $@ + cmd_debianize = $(srctree)/scripts/package/mkdebian $(mkdebian-opts) + +debian: FORCE + $(call cmd,debianize) + +PHONY += debian-orig +debian-orig: private source = $(shell dpkg-parsechangelog -S Source) +debian-orig: private version = $(shell dpkg-parsechangelog -S Version | sed 's/-[^-]*$$//') +debian-orig: private orig-name = $(source)_$(version).orig.tar$(debian-orig-suffix) +debian-orig: mkdebian-opts = --need-source +debian-orig: linux.tar$(debian-orig-suffix) debian + $(Q)if [ "$$(df --output=target .. 2>/dev/null)" = "$$(df --output=target $< 2>/dev/null)" ]; then \ + ln -f $< ../$(orig-name); \ + else \ + cp $< ../$(orig-name); \ + fi + +PHONY += deb-pkg srcdeb-pkg bindeb-pkg + +deb-pkg: private build-type := source,binary +srcdeb-pkg: private build-type := source +bindeb-pkg: private build-type := binary + +deb-pkg srcdeb-pkg: debian-orig +bindeb-pkg: debian +deb-pkg srcdeb-pkg bindeb-pkg: + +$(strip dpkg-buildpackage \ + --build=$(build-type) --no-pre-clean --unsigned-changes \ + $(if $(findstring source, $(build-type)), \ + --unsigned-source --compression=$(KDEB_SOURCE_COMPRESS)) \ + $(if $(findstring binary, $(build-type)), \ + -R'$(MAKE) -f debian/rules' -j1 -a$$(cat debian/arch), \ + --no-check-builddeps) \ + $(DPKG_FLAGS)) + +# snap-pkg +# --------------------------------------------------------------------------- +PHONY += snap-pkg +snap-pkg: + rm -rf $(objtree)/snap + mkdir $(objtree)/snap + $(MAKE) clean + sed "s@KERNELRELEASE@$(KERNELRELEASE)@; \ + s@SRCTREE@$(realpath $(srctree))@" \ + $(srctree)/scripts/package/snapcraft.template > \ + $(objtree)/snap/snapcraft.yaml + cd $(objtree)/snap && \ + snapcraft --target-arch=$(UTS_MACHINE) + +# pacman-pkg +# --------------------------------------------------------------------------- + +PHONY += pacman-pkg +pacman-pkg: + @ln -srf $(srctree)/scripts/package/PKGBUILD $(objtree)/PKGBUILD + +BUILDDIR="$(realpath $(objtree))/pacman" \ + CARCH="$(UTS_MACHINE)" \ + KBUILD_MAKEFLAGS="$(MAKEFLAGS)" \ + KBUILD_REVISION="$(shell $(srctree)/scripts/build-version)" \ + makepkg $(MAKEPKGOPTS) + +# dir-pkg tar*-pkg - tarball targets +# --------------------------------------------------------------------------- + +tar-install: FORCE + $(Q)$(MAKE) -f $(srctree)/Makefile + +$(Q)$(srctree)/scripts/package/buildtar $@ + +compress-tar.gz = -I "$(KGZIP)" +compress-tar.bz2 = -I "$(KBZIP2)" +compress-tar.xz = -I "$(XZ)" +compress-tar.zst = -I "$(ZSTD)" + +quiet_cmd_tar = TAR $@ + cmd_tar = cd $<; tar cf ../$@ $(compress-tar$(suffix $@)) --owner=root --group=root --sort=name * + +dir-tarballs := $(addprefix linux-$(KERNELRELEASE)-$(ARCH), .tar .tar.gz .tar.bz2 .tar.xz .tar.zst) + +$(dir-tarballs): tar-install + $(call cmd,tar) + +PHONY += dir-pkg +dir-pkg: tar-install + @echo "Kernel tree successfully created in $<" + +PHONY += tar-pkg +tar-pkg: linux-$(KERNELRELEASE)-$(ARCH).tar + @: + +tar%-pkg: linux-$(KERNELRELEASE)-$(ARCH).tar.% FORCE + @: + +# modules-cpio-pkg - generate an initramfs with the modules +# --------------------------------------------------------------------------- + +.tmp_modules_cpio: FORCE + $(Q)$(MAKE) -f $(srctree)/Makefile + $(Q)rm -rf $@ + $(Q)$(MAKE) -f $(srctree)/Makefile INSTALL_MOD_PATH=$@/$(INSTALL_MOD_PATH) modules_install + +quiet_cmd_cpio = CPIO $@ + cmd_cpio = $(CONFIG_SHELL) $(srctree)/usr/gen_initramfs.sh -o $@ $< + +modules-$(KERNELRELEASE)-$(ARCH).cpio: .tmp_modules_cpio + $(call cmd,cpio) + +PHONY += modules-cpio-pkg +modules-cpio-pkg: modules-$(KERNELRELEASE)-$(ARCH).cpio + @: + +# perf-tar*-src-pkg - generate a source tarball with perf source +# --------------------------------------------------------------------------- + +.tmp_perf: + $(Q)mkdir .tmp_perf + +.tmp_perf/HEAD: .tmp_HEAD | .tmp_perf + $(call cmd,copy) + +quiet_cmd_perf_version_file = GEN $@ + cmd_perf_version_file = cd $(srctree)/tools/perf; util/PERF-VERSION-GEN $(dir $(abspath $@)) + +# PERF-VERSION-FILE and .tmp_HEAD are independent, but this avoids updating the +# timestamp of PERF-VERSION-FILE. +# The best is to fix tools/perf/util/PERF-VERSION-GEN. +.tmp_perf/PERF-VERSION-FILE: .tmp_HEAD $(srctree)/tools/perf/util/PERF-VERSION-GEN | .tmp_perf + $(call cmd,perf_version_file) + +perf-archive-args = --add-file=$$(realpath $(word 2, $^)) \ + --add-file=$$(realpath $(word 3, $^)) \ + $$(cat $(word 2, $^))^{tree} $$(cat $<) + + +perf-tarballs := $(addprefix perf-$(KERNELVERSION), .tar .tar.gz .tar.bz2 .tar.xz .tar.zst) + +targets += $(perf-tarballs) +$(perf-tarballs): archive-args = --prefix=perf-$(KERNELVERSION)/ $(perf-archive-args) +$(perf-tarballs): tools/perf/MANIFEST .tmp_perf/HEAD .tmp_perf/PERF-VERSION-FILE FORCE + $(call if_changed,archive) + +PHONY += perf-tar-src-pkg +perf-tar-src-pkg: perf-$(KERNELVERSION).tar + @: + +perf-tar%-src-pkg: perf-$(KERNELVERSION).tar.% FORCE + @: + +# Help text displayed when executing 'make help' +# --------------------------------------------------------------------------- +PHONY += help +help: + @echo ' rpm-pkg - Build both source and binary RPM kernel packages' + @echo ' srcrpm-pkg - Build only the source kernel RPM package' + @echo ' binrpm-pkg - Build only the binary kernel RPM package' + @echo ' deb-pkg - Build both source and binary deb kernel packages' + @echo ' srcdeb-pkg - Build only the source kernel deb package' + @echo ' bindeb-pkg - Build only the binary kernel deb package' + @echo ' snap-pkg - Build only the binary kernel snap package' + @echo ' (will connect to external hosts)' + @echo ' pacman-pkg - Build only the binary kernel pacman package' + @echo ' dir-pkg - Build the kernel as a plain directory structure' + @echo ' tar-pkg - Build the kernel as an uncompressed tarball' + @echo ' targz-pkg - Build the kernel as a gzip compressed tarball' + @echo ' tarbz2-pkg - Build the kernel as a bzip2 compressed tarball' + @echo ' tarxz-pkg - Build the kernel as a xz compressed tarball' + @echo ' tarzst-pkg - Build the kernel as a zstd compressed tarball' + @echo ' modules-cpio-pkg - Build the kernel modules as cpio archive' + @echo ' (uses INSTALL_MOD_PATH inside the archive)' + @echo ' perf-tar-src-pkg - Build the perf source tarball with no compression' + @echo ' perf-targz-src-pkg - Build the perf source tarball with gzip compression' + @echo ' perf-tarbz2-src-pkg - Build the perf source tarball with bz2 compression' + @echo ' perf-tarxz-src-pkg - Build the perf source tarball with xz compression' + @echo ' perf-tarzst-src-pkg - Build the perf source tarball with zst compression' + +PHONY += FORCE +FORCE: + +# Read all saved command lines and dependencies for the $(targets) we +# may be building above, using $(if_changed{,_dep}). As an +# optimization, we don't need to read them if the target does not +# exist, we will rebuild anyway in that case. + +existing-targets := $(wildcard $(sort $(targets))) + +-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) + +.PHONY: $(PHONY) -- cgit v1.3.1