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 --- scripts/stackusage | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100755 scripts/stackusage (limited to 'scripts/stackusage') diff --git a/scripts/stackusage b/scripts/stackusage new file mode 100755 index 000000000..56ef1ab67 --- /dev/null +++ b/scripts/stackusage @@ -0,0 +1,34 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +outfile="" +now=`date +%s` + +while [ $# -gt 0 ] +do + case "$1" in + -o) + outfile="$2" + shift 2;; + -h) + echo "usage: $0 [-o outfile] " + exit 0;; + *) break;; + esac +done + +if [ -z "$outfile" ] +then + outfile=`mktemp --tmpdir stackusage.$$.XXXX` +fi + +KCFLAGS="${KCFLAGS} -fstack-usage" make "$@" + +# Prepend directory name to file names, remove column information, +# make file:line/function/size/type properly tab-separated. +find . -name '*.su' -newermt "@${now}" -print | \ + xargs perl -MFile::Basename -pe \ + '$d = dirname($ARGV); s#([^:]+:[0-9]+):[0-9]+:#$d/$1\t#;' | \ + sort -k3,3nr > "${outfile}" + +echo "$0: output written to ${outfile}" -- cgit v1.3.1