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 --- rust/zerocopy/rustdoc/style.css | 56 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 rust/zerocopy/rustdoc/style.css (limited to 'rust/zerocopy/rustdoc/style.css') diff --git a/rust/zerocopy/rustdoc/style.css b/rust/zerocopy/rustdoc/style.css new file mode 100644 index 000000000..d2d55ad2e --- /dev/null +++ b/rust/zerocopy/rustdoc/style.css @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: (BSD-2-Clause OR Apache-2.0) OR MIT */ +/* +Copyright 2026 The Fuchsia Authors + +Licensed under a BSD-style license , Apache License, Version 2.0 +, or the MIT +license , at your option. +This file may not be copied, modified, or distributed except according to +those terms. +*/ + +.codegen-tabs { + display: grid; + grid-template-columns: repeat(var(--arity), minmax(200px, 1fr)); + grid-template-rows: auto 1fr; + column-gap: 1rem; +} + +.codegen-tabs:not(:has(> details[open]))::after { + grid-column: 1/-1; + content: 'Click one of the above headers to expand its contents.'; + font-style: italic; + font-size: small; + text-align: center; +} + +.codegen-tabs details { + display: grid; + grid-column: 1 / -1; + grid-row: 1 / span 2; + grid-template-columns: subgrid; + grid-template-rows: subgrid; +} + +.codegen-tabs summary { + display: grid; + grid-column: var(--n) / span 1; + grid-row: 1; + z-index: 1; + border-bottom: 2px solid var(--headings-border-bottom-color); + cursor: pointer; +} + +.codegen-tabs details[open] > summary { + background-color: var(--code-block-background-color); + border-bottom-color: var(--target-border-color); +} + +.codegen-tabs details::details-content { + grid-column: 1 / -1; + grid-row: 2; +} + +.codegen-tabs details:not([open])::details-content { + display: none; +} -- cgit v1.3.1