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, 45 insertions, 0 deletions

diff --git a/include/sound/wm8993.h b/include/sound/wm8993.h
new file mode 100644
index 000000000..8cf9de85d
--- /dev/null
+++ b/include/sound/wm8993.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/sound/wm8993.h -- Platform data for WM8993
+ *
+ * Copyright 2009 Wolfson Microelectronics. PLC.
+ */
+
+#ifndef __LINUX_SND_WM8993_H
+#define __LINUX_SND_WM8993_H
+
+/* Note that EQ1 only contains the enable/disable bit so will be
+   ignored but is included for simplicity.
+ */
+struct wm8993_retune_mobile_setting {
+	const char *name;
+	unsigned int rate;
+	u16 config[24];
+};
+
+struct wm8993_platform_data {
+	struct wm8993_retune_mobile_setting *retune_configs;
+	int num_retune_configs;
+
+	/* LINEOUT can be differential or single ended */
+	unsigned int lineout1_diff:1;
+	unsigned int lineout2_diff:1;
+
+	/* Common mode feedback */
+	unsigned int lineout1fb:1;
+	unsigned int lineout2fb:1;
+
+	/* Delay to add for microphones to stabalise after power up */
+	int micbias1_delay;
+	int micbias2_delay;
+
+	/* Microphone biases: 0=0.9*AVDD1 1=0.65*AVVD1 */
+	unsigned int micbias1_lvl:1;
+	unsigned int micbias2_lvl:1;
+
+	/* Jack detect threshold levels, see datasheet for values */
+	unsigned int jd_scthr:2;
+	unsigned int jd_thr:2;
+};
+
+#endif