From 33a154a96e71a34a1bcca9f40da343dbbf7b38b4 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Thu, 1 Oct 2026 14:52:55 +0000 Subject: selftests/bpf: Test packet range of pointers sharing an id Add tests where two packet pointers share an id and tightening one pointer's umax from its var_off would put it less than their constant distance from the other's umax: with an index & 0x38 capped at 50, the base pointer keeps umax 50, so the pointer 8 bytes further on must keep umax 58, even though its known bits allow at most 56. These refused a valid program or accepted an out-of-bounds access before the fix: - check the advanced copy, load through the base: valid, was refused; - check the base, load the byte at base + 1 through a copy advanced by 8: was accepted; - check base + 4, load 4 bytes at base + 2 through base + 8: reads two bytes past the checked range, was accepted; - the same as the second with data_meta pointers checked against data: was accepted. These pass with and without the fix and cover nearby paths: - subtract an unknown scalar from a checked pointer and load below it (the range is kept across a new id); - reach a load through two paths whose checks cover 8 and 7 bytes after the loaded pointer; the second path must not be pruned by the first; - spill a copy of a pointer, check the pointer, fill the copy and load one byte past the checked range: the load is refused, and the copy has the range of the check. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20261001145255.855630-2-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- scripts/package/mkspec | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100755 scripts/package/mkspec (limited to 'scripts/package/mkspec') diff --git a/scripts/package/mkspec b/scripts/package/mkspec new file mode 100755 index 000000000..c604f8c17 --- /dev/null +++ b/scripts/package/mkspec @@ -0,0 +1,97 @@ +#!/bin/sh +# +# Output a simple RPM spec file. +# This version assumes a minimum of RPM 4.13 +# +# The only gothic bit here is redefining install_post to avoid +# stripping the symbols from files in the kernel which we want +# +# Patched for non-x86 by Opencon (L) 2002 +# + +set -eu + +output=$1 + +mkdir -p "$(dirname "${output}")" + +exec >"${output}" + +if grep -q CONFIG_MODULES=y include/config/auto.conf; then +echo '%define with_devel %{?_without_devel: 0} %{?!_without_devel: 1}' +else +echo '%define with_devel 0' +fi + +# use %{debug_package} machinery to generate -debuginfo +with_debuginfo_rpm=0 +# manually generate -debuginfo package +with_debuginfo_manual=0 +# debuginfo package generation uses find-debuginfo.sh under the hood, +# which only works on uncompressed modules that contain debuginfo +if grep -q CONFIG_DEBUG_INFO=y include/config/auto.conf && + (! grep -q CONFIG_MODULE_COMPRESS=y include/config/auto.conf) && + (! grep -q CONFIG_DEBUG_INFO_SPLIT=y include/config/auto.conf); then + # If module signing is enabled (which may be required to boot with + # lockdown enabled), the find-debuginfo.sh machinery cannot be used + # because the signatures will be stripped off the modules. However, due + # to an rpm bug in versions prior to 4.20.0 + # + # https://github.com/rpm-software-management/rpm/issues/3057 + # https://github.com/rpm-software-management/rpm/commit/49f906998f3cf1f4152162ca61ac0869251c380f + # + # We cannot provide our own debuginfo package because it does not listen + # to our custom files list, failing the build due to unpackaged files. + # Manually generate the debug info package if using rpm 4.20.0. If not + # using rpm 4.20.0, avoid generating a -debuginfo package altogether, + # as it is not safe. + if grep -q CONFIG_MODULE_SIG=y include/config/auto.conf; then + rpm_ver_str=$(rpm --version 2>/dev/null) + # Split the version on spaces + IFS=' ' + set -- $rpm_ver_str + if [ "${1:-}" = RPM -a "${2:-}" = version ]; then + IFS=. + set -- $3 + rpm_ver=$(( 1000000 * $1 + 10000 * $2 + 100 * $3 + ${4:-0} )) + if [ "$rpm_ver" -ge 4200000 ]; then + with_debuginfo_manual='%{?_without_debuginfo:0}%{?!_without_debuginfo:1}' + fi + fi + else + with_debuginfo_rpm='%{?_without_debuginfo:0}%{?!_without_debuginfo:1}' + fi +fi +echo "%define with_debuginfo_manual $with_debuginfo_manual" +echo "%define with_debuginfo_rpm $with_debuginfo_rpm" + +cat</dev/null || hostname)} + builduser=${KBUILD_BUILD_USER:-$(id -nu)} + email="${builduser}@${buildhost}" +fi + +cat << EOF + +%changelog +* $(LC_ALL=C date +'%a %b %d %Y') ${name} <${email}> +- Custom built Linux kernel. +EOF -- cgit v1.3.1