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, 37 insertions, 0 deletions

diff --git a/include/sound/sof/dai-amd.h b/include/sound/sof/dai-amd.h
new file mode 100644
index 000000000..e2107da65
--- /dev/null
+++ b/include/sound/sof/dai-amd.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
+/*
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * Copyright(c) 2021 Advanced Micro Devices, Inc.. All rights reserved.
+ */
+
+#ifndef __INCLUDE_SOUND_SOF_DAI_AMD_H__
+#define __INCLUDE_SOUND_SOF_DAI_AMD_H__
+
+#include <sound/sof/header.h>
+
+/* ACP Configuration Request - SOF_IPC_DAI_AMD_CONFIG */
+struct sof_ipc_dai_acp_params {
+	struct sof_ipc_hdr hdr;
+
+	uint32_t fsync_rate;    /* FSYNC frequency in Hz */
+	uint32_t tdm_slots;
+	uint32_t tdm_mode;
+	uint32_t format;
+} __packed;
+
+/* ACPDMIC Configuration Request - SOF_IPC_DAI_AMD_CONFIG */
+struct sof_ipc_dai_acpdmic_params {
+	uint32_t pdm_rate;
+	uint32_t pdm_ch;
+} __packed;
+
+/* ACP_SDW Configuration Request - SOF_IPC_DAI_AMD_SDW_CONFIG */
+struct sof_ipc_dai_acp_sdw_params {
+	struct sof_ipc_hdr hdr;
+	u32 rate;
+	u32 channels;
+} __packed;
+
+#endif