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/mkuboot.sh | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100755 scripts/mkuboot.sh (limited to 'scripts/mkuboot.sh') diff --git a/scripts/mkuboot.sh b/scripts/mkuboot.sh new file mode 100755 index 000000000..4b1fe09e9 --- /dev/null +++ b/scripts/mkuboot.sh @@ -0,0 +1,20 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +# +# Build U-Boot image when `mkimage' tool is available. +# + +MKIMAGE=$(type -path "${CROSS_COMPILE}mkimage") + +if [ -z "${MKIMAGE}" ]; then + MKIMAGE=$(type -path mkimage) + if [ -z "${MKIMAGE}" ]; then + # Doesn't exist + echo '"mkimage" command not found - U-Boot images will not be built' >&2 + exit 1; + fi +fi + +# Call "mkimage" to create U-Boot image +${MKIMAGE} "$@" -- cgit v1.3.1