From ff917923f4fb9c83717ba135ee47d7e4c1567bb7 Mon Sep 17 00:00:00 2001
From: Muhammad Bilal <meatuni001@gmail.com>
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 <meatuni001@gmail.com>
Link: https://patch.msgid.link/20260728125456.32359-3-meatuni001@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/serial/Makefile | 65 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 drivers/usb/serial/Makefile

(limited to 'drivers/usb/serial/Makefile')

diff --git a/drivers/usb/serial/Makefile b/drivers/usb/serial/Makefile
new file mode 100644
index 000000000..c7bb1a881
--- /dev/null
+++ b/drivers/usb/serial/Makefile
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the USB serial device drivers.
+#
+
+# Object file lists.
+
+obj-$(CONFIG_USB_SERIAL)			+= usbserial.o
+
+usbserial-y := usb-serial.o generic.o bus.o
+
+usbserial-$(CONFIG_USB_SERIAL_CONSOLE)	+= console.o
+
+obj-$(CONFIG_USB_SERIAL_AIRCABLE)		+= aircable.o
+obj-$(CONFIG_USB_SERIAL_ARK3116)		+= ark3116.o
+obj-$(CONFIG_USB_SERIAL_BELKIN)			+= belkin_sa.o
+obj-$(CONFIG_USB_SERIAL_CH341)			+= ch341.o
+obj-$(CONFIG_USB_SERIAL_CP210X)			+= cp210x.o
+obj-$(CONFIG_USB_SERIAL_CYBERJACK)		+= cyberjack.o
+obj-$(CONFIG_USB_SERIAL_CYPRESS_M8)		+= cypress_m8.o
+obj-$(CONFIG_USB_SERIAL_DEBUG)			+= usb_debug.o
+obj-$(CONFIG_USB_SERIAL_DIGI_ACCELEPORT)	+= digi_acceleport.o
+obj-$(CONFIG_USB_SERIAL_EDGEPORT)		+= io_edgeport.o
+obj-$(CONFIG_USB_SERIAL_EDGEPORT_TI)		+= io_ti.o
+obj-$(CONFIG_USB_SERIAL_EMPEG)			+= empeg.o
+obj-$(CONFIG_USB_SERIAL_F81232)			+= f81232.o
+obj-$(CONFIG_USB_SERIAL_F8153X)			+= f81534.o
+obj-$(CONFIG_USB_SERIAL_FTDI_SIO)		+= ftdi_sio.o
+obj-$(CONFIG_USB_SERIAL_GARMIN)			+= garmin_gps.o
+obj-$(CONFIG_USB_SERIAL_IPAQ)			+= ipaq.o
+obj-$(CONFIG_USB_SERIAL_IPW)			+= ipw.o
+obj-$(CONFIG_USB_SERIAL_IR)			+= ir-usb.o
+obj-$(CONFIG_USB_SERIAL_IUU)			+= iuu_phoenix.o
+obj-$(CONFIG_USB_SERIAL_KEYSPAN)		+= keyspan.o
+obj-$(CONFIG_USB_SERIAL_KEYSPAN_PDA)		+= keyspan_pda.o
+obj-$(CONFIG_USB_SERIAL_KLSI)			+= kl5kusb105.o
+obj-$(CONFIG_USB_SERIAL_KOBIL_SCT)		+= kobil_sct.o
+obj-$(CONFIG_USB_SERIAL_MCT_U232)		+= mct_u232.o
+obj-$(CONFIG_USB_SERIAL_METRO)			+= metro-usb.o
+obj-$(CONFIG_USB_SERIAL_MOS7720)		+= mos7720.o
+obj-$(CONFIG_USB_SERIAL_MOS7840)		+= mos7840.o
+obj-$(CONFIG_USB_SERIAL_MXUPORT)		+= mxuport.o
+obj-$(CONFIG_USB_SERIAL_NAVMAN)			+= navman.o
+obj-$(CONFIG_USB_SERIAL_OMNINET)		+= omninet.o
+obj-$(CONFIG_USB_SERIAL_OPTICON)		+= opticon.o
+obj-$(CONFIG_USB_SERIAL_OPTION)			+= option.o
+obj-$(CONFIG_USB_SERIAL_OTI6858)		+= oti6858.o
+obj-$(CONFIG_USB_SERIAL_PL2303)			+= pl2303.o
+obj-$(CONFIG_USB_SERIAL_QCAUX)			+= qcaux.o
+obj-$(CONFIG_USB_SERIAL_QUALCOMM)		+= qcserial.o
+obj-$(CONFIG_USB_SERIAL_QT2)			+= quatech2.o
+obj-$(CONFIG_USB_SERIAL_SAFE)			+= safe_serial.o
+obj-$(CONFIG_USB_SERIAL_SIERRAWIRELESS)		+= sierra.o
+obj-$(CONFIG_USB_SERIAL_SIMPLE)			+= usb-serial-simple.o
+obj-$(CONFIG_USB_SERIAL_SPCP8X5)		+= spcp8x5.o
+obj-$(CONFIG_USB_SERIAL_SSU100)			+= ssu100.o
+obj-$(CONFIG_USB_SERIAL_SYMBOL)			+= symbolserial.o
+obj-$(CONFIG_USB_SERIAL_WWAN)			+= usb_wwan.o
+obj-$(CONFIG_USB_SERIAL_TI)			+= ti_usb_3410_5052.o
+obj-$(CONFIG_USB_SERIAL_UPD78F0730)		+= upd78f0730.o
+obj-$(CONFIG_USB_SERIAL_VISOR)			+= visor.o
+obj-$(CONFIG_USB_SERIAL_WISHBONE)		+= wishbone-serial.o
+obj-$(CONFIG_USB_SERIAL_WHITEHEAT)		+= whiteheat.o
+obj-$(CONFIG_USB_SERIAL_XR)			+= xr_serial.o
+obj-$(CONFIG_USB_SERIAL_XSENS_MT)		+= xsens_mt.o
-- 
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