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 --- tools/build/Makefile.include | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 tools/build/Makefile.include (limited to 'tools/build/Makefile.include') diff --git a/tools/build/Makefile.include b/tools/build/Makefile.include new file mode 100644 index 000000000..0e4de8340 --- /dev/null +++ b/tools/build/Makefile.include @@ -0,0 +1,20 @@ +# SPDX-License-Identifier: GPL-2.0-only +build := -f $(srctree)/tools/build/Makefile.build dir=. obj + +# More than just $(Q), we sometimes want to suppress all command output from a +# recursive make -- even the 'up to date' printout. +ifeq ($(V),1) + Q ?= + SILENT_MAKE = +$(Q)$(MAKE) +else + Q ?= @ + SILENT_MAKE = +$(Q)$(MAKE) --silent +endif + +fixdep: + $(SILENT_MAKE) -C $(srctree)/tools/build CFLAGS= LDFLAGS= $(OUTPUT)fixdep + +fixdep-clean: + $(Q)$(MAKE) -C $(srctree)/tools/build clean + +.PHONY: fixdep -- cgit v1.3.1