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, 31 insertions, 0 deletions

diff --git a/include/dt-bindings/pinctrl/sppctl.h b/include/dt-bindings/pinctrl/sppctl.h
new file mode 100644
index 000000000..50557265d
--- /dev/null
+++ b/include/dt-bindings/pinctrl/sppctl.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Sunplus dt-bindings Pinctrl header file
+ * Copyright (C) Sunplus Tech / Tibbo Tech.
+ * Author: Dvorkin Dmitry <dvorkin@tibbo.com>
+ */
+
+#ifndef __DT_BINDINGS_PINCTRL_SPPCTL_H__
+#define __DT_BINDINGS_PINCTRL_SPPCTL_H__
+
+#define IOP_G_MASTE		(0x01 << 0)
+#define IOP_G_FIRST		(0x01 << 1)
+
+#define SPPCTL_PCTL_G_PMUX	(0x00        | IOP_G_MASTE)
+#define SPPCTL_PCTL_G_GPIO	(IOP_G_FIRST | IOP_G_MASTE)
+#define SPPCTL_PCTL_G_IOPP	(IOP_G_FIRST | 0x00)
+
+#define SPPCTL_PCTL_L_OUT	(0x01 << 0)	/* Output LOW        */
+#define SPPCTL_PCTL_L_OU1	(0x01 << 1)	/* Output HIGH       */
+#define SPPCTL_PCTL_L_INV	(0x01 << 2)	/* Input Invert      */
+#define SPPCTL_PCTL_L_ONV	(0x01 << 3)	/* Output Invert     */
+#define SPPCTL_PCTL_L_ODR	(0x01 << 4)	/* Output Open Drain */
+
+/*
+ * pack into 32-bit value:
+ * pin# (8bit), typ (8bit), function (8bit), flag (8bit)
+ */
+#define SPPCTL_IOPAD(pin, typ, fun, flg)	(((pin) << 24) | ((typ) << 16) | \
+						((fun) << 8) | (flg))
+
+#endif