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/package/buildtar | 110 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100755 scripts/package/buildtar (limited to 'scripts/package/buildtar') diff --git a/scripts/package/buildtar b/scripts/package/buildtar new file mode 100755 index 000000000..cc87a473c --- /dev/null +++ b/scripts/package/buildtar @@ -0,0 +1,110 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +# +# buildtar 0.0.5 +# +# (C) 2004-2006 by Jan-Benedict Glaw +# +# This script is used to compile a tarball from the currently +# prepared kernel. Based upon the builddeb script from +# Wichert Akkerman . +# + +set -eu + +# +# Some variables and settings used throughout the script +# +tmpdir=$1 + +# +# Clean-up and re-create the temporary directory +# +rm -rf -- "${tmpdir}" +mkdir -p -- "${tmpdir}/boot" + + +# +# Try to install dtbs +# +if grep -q '^CONFIG_OF_EARLY_FLATTREE=y' include/config/auto.conf; then + # Only some architectures with OF support have this target + if [ -d "${srctree}/arch/${SRCARCH}/boot/dts" ]; then + $MAKE ARCH="${ARCH}" -f ${srctree}/Makefile INSTALL_DTBS_PATH="${tmpdir}/boot/dtbs/${KERNELRELEASE}" dtbs_install + fi +fi + + +# +# Install modules +# +make ARCH="${ARCH}" -f ${srctree}/Makefile INSTALL_MOD_PATH="${tmpdir}" modules_install + + +# +# Install basic kernel files +# +cp -v -- "${objtree}/System.map" "${tmpdir}/boot/System.map-${KERNELRELEASE}" +cp -v -- "${KCONFIG_CONFIG}" "${tmpdir}/boot/config-${KERNELRELEASE}" +cp -v -- "${objtree}/vmlinux" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}" + + +# +# Install arch-specific kernel image(s) +# +# Note: +# mips and arm64 copy the first image found. This may not produce the desired +# outcome because it may pick up a stale file remaining in the build tree. +# +case "${ARCH}" in + alpha) + cp -v -- "${objtree}/arch/alpha/boot/vmlinux.gz" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}" + ;; + parisc*) + cp -v -- "${KBUILD_IMAGE}" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}" + [ -f "${objtree}/lifimage" ] && cp -v -- "${objtree}/lifimage" "${tmpdir}/boot/lifimage-${KERNELRELEASE}" + ;; + mips) + # Please note the following code may copy a stale file. + if [ -f "${objtree}/arch/mips/boot/compressed/vmlinux.bin" ]; then + cp -v -- "${objtree}/arch/mips/boot/compressed/vmlinux.bin" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}" + elif [ -f "${objtree}/arch/mips/boot/compressed/vmlinux.ecoff" ]; then + cp -v -- "${objtree}/arch/mips/boot/compressed/vmlinux.ecoff" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}" + elif [ -f "${objtree}/arch/mips/boot/compressed/vmlinux.srec" ]; then + cp -v -- "${objtree}/arch/mips/boot/compressed/vmlinux.srec" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}" + elif [ -f "${objtree}/vmlinux.32" ]; then + cp -v -- "${objtree}/vmlinux.32" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}" + elif [ -f "${objtree}/vmlinux.64" ]; then + cp -v -- "${objtree}/vmlinux.64" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}" + elif [ -f "${objtree}/arch/mips/boot/vmlinux.bin" ]; then + cp -v -- "${objtree}/arch/mips/boot/vmlinux.bin" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}" + elif [ -f "${objtree}/arch/mips/boot/vmlinux.ecoff" ]; then + cp -v -- "${objtree}/arch/mips/boot/vmlinux.ecoff" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}" + elif [ -f "${objtree}/arch/mips/boot/vmlinux.srec" ]; then + cp -v -- "${objtree}/arch/mips/boot/vmlinux.srec" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}" + elif [ -f "${objtree}/vmlinux" ]; then + cp -v -- "${objtree}/vmlinux" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}" + fi + ;; + arm64) + # Please note the following code may copy a stale file. + for i in Image.bz2 Image.gz Image.lz4 Image.lzma Image.lzo vmlinuz.efi ; do + if [ -f "${objtree}/arch/arm64/boot/${i}" ] ; then + cp -v -- "${objtree}/arch/arm64/boot/${i}" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}" + break + fi + done + ;; + riscv) + case "${KBUILD_IMAGE##*/}" in + Image.*|vmlinuz.efi) + cp -v -- "${KBUILD_IMAGE}" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}";; + *) + cp -v -- "${KBUILD_IMAGE}" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}";; + esac + ;; + *) + cp -v -- "${KBUILD_IMAGE}" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}" + ;; +esac -- cgit v1.3.1