From ff917923f4fb9c83717ba135ee47d7e4c1567bb7 Mon Sep 17 00:00:00 2001 From: Muhammad Bilal Date: Tue, 28 Jul 2026 17:54:55 +0500 Subject: staging: rtl8723bs: fix OOB read in rtw_action_frame_parse() rtw_action_frame_parse() takes a frame_len parameter but never actually checks it before indexing into the frame body: const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr); ... c = frame_body[0]; ... a = frame_body[1]; frame_body already points 24 bytes (sizeof(struct ieee80211_hdr_3addr)) into frame, so reading frame_body[0] and frame_body[1] requires frame_len >= 26. A management action frame shorter than that (e.g. exactly 24 bytes, the minimum a malicious peer can send) causes a 1-2 byte out-of-bounds read. This is reachable from rtw_cfg80211_monitor_if_xmit_entry() and cfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass attacker/user-influenced frame buffers and lengths straight through. Add the missing length check before frame_body is dereferenced. Fixes: 554c0a3abf216 ("staging: Add rtl8723bs sdio wifi driver") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal Link: https://patch.msgid.link/20260728125456.32359-3-meatuni001@gmail.com Signed-off-by: Greg Kroah-Hartman --- rust/proc-macro2/probe/proc_macro_span.rs | 53 ++++++++++++++++++++++ rust/proc-macro2/probe/proc_macro_span_file.rs | 16 +++++++ rust/proc-macro2/probe/proc_macro_span_location.rs | 23 ++++++++++ 3 files changed, 92 insertions(+) create mode 100644 rust/proc-macro2/probe/proc_macro_span.rs create mode 100644 rust/proc-macro2/probe/proc_macro_span_file.rs create mode 100644 rust/proc-macro2/probe/proc_macro_span_location.rs (limited to 'rust/proc-macro2/probe') diff --git a/rust/proc-macro2/probe/proc_macro_span.rs b/rust/proc-macro2/probe/proc_macro_span.rs new file mode 100644 index 000000000..892a7eb3e --- /dev/null +++ b/rust/proc-macro2/probe/proc_macro_span.rs @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: Apache-2.0 OR MIT + +// This code exercises the surface area that we expect of Span's unstable API. +// If the current toolchain is able to compile it, then proc-macro2 is able to +// offer these APIs too. + +#![cfg_attr(procmacro2_build_probe, feature(proc_macro_span))] + +extern crate proc_macro; + +use core::ops::{Range, RangeBounds}; +use proc_macro::{Literal, Span}; +use std::path::PathBuf; + +pub fn byte_range(this: &Span) -> Range { + this.byte_range() +} + +pub fn start(this: &Span) -> Span { + this.start() +} + +pub fn end(this: &Span) -> Span { + this.end() +} + +pub fn line(this: &Span) -> usize { + this.line() +} + +pub fn column(this: &Span) -> usize { + this.column() +} + +pub fn file(this: &Span) -> String { + this.file() +} + +pub fn local_file(this: &Span) -> Option { + this.local_file() +} + +pub fn join(this: &Span, other: Span) -> Option { + this.join(other) +} + +pub fn subspan>(this: &Literal, range: R) -> Option { + this.subspan(range) +} + +// Include in sccache cache key. +#[cfg(procmacro2_build_probe)] +const _: Option<&str> = option_env!("RUSTC_BOOTSTRAP"); diff --git a/rust/proc-macro2/probe/proc_macro_span_file.rs b/rust/proc-macro2/probe/proc_macro_span_file.rs new file mode 100644 index 000000000..f2dbc4056 --- /dev/null +++ b/rust/proc-macro2/probe/proc_macro_span_file.rs @@ -0,0 +1,16 @@ +// SPDX-License-Identifier: Apache-2.0 OR MIT + +// The subset of Span's API stabilized in Rust 1.88. + +extern crate proc_macro; + +use proc_macro::Span; +use std::path::PathBuf; + +pub fn file(this: &Span) -> String { + this.file() +} + +pub fn local_file(this: &Span) -> Option { + this.local_file() +} diff --git a/rust/proc-macro2/probe/proc_macro_span_location.rs b/rust/proc-macro2/probe/proc_macro_span_location.rs new file mode 100644 index 000000000..ae19c9339 --- /dev/null +++ b/rust/proc-macro2/probe/proc_macro_span_location.rs @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: Apache-2.0 OR MIT + +// The subset of Span's API stabilized in Rust 1.88. + +extern crate proc_macro; + +use proc_macro::Span; + +pub fn start(this: &Span) -> Span { + this.start() +} + +pub fn end(this: &Span) -> Span { + this.end() +} + +pub fn line(this: &Span) -> usize { + this.line() +} + +pub fn column(this: &Span) -> usize { + this.column() +} -- cgit v1.3.1