staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()grafted

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>

1 files changed, 66 insertions, 0 deletions

diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
new file mode 100644
index 000000000..34469711c
--- /dev/null
+++ b/drivers/video/backlight/Makefile
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: GPL-2.0
+# Backlight & LCD drivers
+
+obj-$(CONFIG_LCD_AMS369FG06)		+= ams369fg06.o
+obj-$(CONFIG_LCD_CLASS_DEVICE)		+= lcd.o
+obj-$(CONFIG_LCD_CORGI)			+= corgi_lcd.o
+obj-$(CONFIG_LCD_HP700)			+= jornada720_lcd.o
+obj-$(CONFIG_LCD_HX8357)		+= hx8357.o
+obj-$(CONFIG_LCD_ILI922X)		+= ili922x.o
+obj-$(CONFIG_LCD_ILI9320)		+= ili9320.o
+obj-$(CONFIG_LCD_L4F00242T03)		+= l4f00242t03.o
+obj-$(CONFIG_LCD_LMS283GF05)		+= lms283gf05.o
+obj-$(CONFIG_LCD_LMS501KF03)		+= lms501kf03.o
+obj-$(CONFIG_LCD_LTV350QV)		+= ltv350qv.o
+obj-$(CONFIG_LCD_OTM3225A)		+= otm3225a.o
+obj-$(CONFIG_LCD_PLATFORM)		+= platform_lcd.o
+obj-$(CONFIG_LCD_TDO24M)		+= tdo24m.o
+obj-$(CONFIG_LCD_VGG2432A4)		+= vgg2432a4.o
+
+obj-$(CONFIG_BACKLIGHT_88PM860X)	+= 88pm860x_bl.o
+obj-$(CONFIG_BACKLIGHT_AAT2870)		+= aat2870_bl.o
+obj-$(CONFIG_BACKLIGHT_ADP5520)		+= adp5520_bl.o
+obj-$(CONFIG_BACKLIGHT_ADP8860)		+= adp8860_bl.o
+obj-$(CONFIG_BACKLIGHT_ADP8870)		+= adp8870_bl.o
+obj-$(CONFIG_BACKLIGHT_APPLE)		+= apple_bl.o
+obj-$(CONFIG_BACKLIGHT_APPLE_DWI)	+= apple_dwi_bl.o
+obj-$(CONFIG_BACKLIGHT_AS3711)		+= as3711_bl.o
+obj-$(CONFIG_BACKLIGHT_AW99706)		+= aw99706.o
+obj-$(CONFIG_BACKLIGHT_BD6107)		+= bd6107.o
+obj-$(CONFIG_BACKLIGHT_CGBC)		+= cgbc_bl.o
+obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE)	+= backlight.o
+obj-$(CONFIG_BACKLIGHT_DA903X)		+= da903x_bl.o
+obj-$(CONFIG_BACKLIGHT_DA9052)		+= da9052_bl.o
+obj-$(CONFIG_BACKLIGHT_EP93XX)		+= ep93xx_bl.o
+obj-$(CONFIG_BACKLIGHT_GPIO)		+= gpio_backlight.o
+obj-$(CONFIG_BACKLIGHT_HP680)		+= hp680_bl.o
+obj-$(CONFIG_BACKLIGHT_HP700)		+= jornada720_bl.o
+obj-$(CONFIG_BACKLIGHT_IPAQ_MICRO)	+= ipaq_micro_bl.o
+obj-$(CONFIG_BACKLIGHT_KTD253)		+= ktd253-backlight.o
+obj-$(CONFIG_BACKLIGHT_KTD2801)		+= ktd2801-backlight.o
+obj-$(CONFIG_BACKLIGHT_KTZ8866)		+= ktz8866.o
+obj-$(CONFIG_BACKLIGHT_LM3509)		+= lm3509_bl.o
+obj-$(CONFIG_BACKLIGHT_LM3533)		+= lm3533_bl.o
+obj-$(CONFIG_BACKLIGHT_LM3630A)		+= lm3630a_bl.o
+obj-$(CONFIG_BACKLIGHT_LM3639)		+= lm3639_bl.o
+obj-$(CONFIG_BACKLIGHT_LOCOMO)		+= locomolcd.o
+obj-$(CONFIG_BACKLIGHT_LP855X)		+= lp855x_bl.o
+obj-$(CONFIG_BACKLIGHT_LP8788)		+= lp8788_bl.o
+obj-$(CONFIG_BACKLIGHT_LV5207LP)	+= lv5207lp.o
+obj-$(CONFIG_BACKLIGHT_MAX25014)	+= max25014.o
+obj-$(CONFIG_BACKLIGHT_MAX8925)		+= max8925_bl.o
+obj-$(CONFIG_BACKLIGHT_MP3309C)		+= mp3309c.o
+obj-$(CONFIG_BACKLIGHT_MT6370)		+= mt6370-backlight.o
+obj-$(CONFIG_BACKLIGHT_OMAP1)		+= omap1_bl.o
+obj-$(CONFIG_BACKLIGHT_PANDORA)		+= pandora_bl.o
+obj-$(CONFIG_BACKLIGHT_PWM)		+= pwm_bl.o
+obj-$(CONFIG_BACKLIGHT_QCOM_WLED)	+= qcom-wled.o
+obj-$(CONFIG_BACKLIGHT_RT4831)		+= rt4831-backlight.o
+obj-$(CONFIG_BACKLIGHT_SAHARA)		+= kb3886_bl.o
+obj-$(CONFIG_BACKLIGHT_SY7758)		+= sy7758.o
+obj-$(CONFIG_BACKLIGHT_SKY81452)	+= sky81452-backlight.o
+obj-$(CONFIG_BACKLIGHT_TPS65217)	+= tps65217_bl.o
+obj-$(CONFIG_BACKLIGHT_WM831X)		+= wm831x_bl.o
+obj-$(CONFIG_BACKLIGHT_ARCXCNN) 	+= arcxcnn_bl.o
+obj-$(CONFIG_BACKLIGHT_RAVE_SP)		+= rave-sp-backlight.o
+obj-$(CONFIG_BACKLIGHT_LED)		+= led_bl.o