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, 32 insertions, 0 deletions

diff --git a/include/dt-bindings/phy/phy.h b/include/dt-bindings/phy/phy.h
new file mode 100644
index 000000000..979b5dfd8
--- /dev/null
+++ b/include/dt-bindings/phy/phy.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *
+ * This header provides constants for the phy framework
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ * Author: Gabriel Fernandez <gabriel.fernandez@st.com>
+ */
+
+#ifndef _DT_BINDINGS_PHY
+#define _DT_BINDINGS_PHY
+
+#define PHY_NONE		0
+#define PHY_TYPE_SATA		1
+#define PHY_TYPE_PCIE		2
+#define PHY_TYPE_USB2		3
+#define PHY_TYPE_USB3		4
+#define PHY_TYPE_UFS		5
+#define PHY_TYPE_DP		6
+#define PHY_TYPE_XPCS		7
+#define PHY_TYPE_SGMII		8
+#define PHY_TYPE_QSGMII		9
+#define PHY_TYPE_DPHY		10
+#define PHY_TYPE_CPHY		11
+#define PHY_TYPE_USXGMII	12
+#define PHY_TYPE_XAUI		13
+
+#define PHY_POL_NORMAL		0
+#define PHY_POL_INVERT		1
+#define PHY_POL_AUTO		2
+
+#endif /* _DT_BINDINGS_PHY */