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/min-tool-version.sh | 49 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100755 scripts/min-tool-version.sh (limited to 'scripts/min-tool-version.sh') diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh new file mode 100755 index 000000000..99bfdcaa3 --- /dev/null +++ b/scripts/min-tool-version.sh @@ -0,0 +1,49 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0-only +# +# Print the minimum supported version of the given tool. +# When you raise the minimum version, please update +# Documentation/process/changes.rst as well. + +set -e + +if [ $# != 1 ]; then + echo "Usage: $0 toolname" >&2 + exit 1 +fi + +case "$1" in +binutils) + echo 2.30.0 + ;; +gcc) + if [ "$ARCH" = parisc64 ]; then + echo 12.0.0 + else + echo 8.1.0 + fi + ;; +llvm) + if [ "$SRCARCH" = loongarch ]; then + echo 18.0.0 + else + echo 17.0.1 + fi + ;; +rustc) + if [ "$SRCARCH" = "s390" ]; then + echo 1.96.0 + elif [ "$ARCH" = powerpc ]; then + echo 1.95.0 + else + echo 1.85.0 + fi + ;; +bindgen) + echo 0.71.1 + ;; +*) + echo "$1: unknown tool" >&2 + exit 1 + ;; +esac -- cgit v1.3.1