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, 58 insertions, 0 deletions

diff --git a/drivers/crypto/geode-aes.h b/drivers/crypto/geode-aes.h
new file mode 100644
index 000000000..6d0a0cdc7
--- /dev/null
+++ b/drivers/crypto/geode-aes.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2003-2006, Advanced Micro Devices, Inc.
+ */
+
+#ifndef _GEODE_AES_H_
+#define _GEODE_AES_H_
+
+/* driver logic flags */
+#define AES_MODE_ECB 0
+#define AES_MODE_CBC 1
+
+#define AES_DIR_DECRYPT 0
+#define AES_DIR_ENCRYPT 1
+
+#define AES_FLAGS_HIDDENKEY (1 << 0)
+
+/* Register definitions */
+
+#define AES_CTRLA_REG  0x0000
+
+#define AES_CTRL_START     0x01
+#define AES_CTRL_DECRYPT   0x00
+#define AES_CTRL_ENCRYPT   0x02
+#define AES_CTRL_WRKEY     0x04
+#define AES_CTRL_DCA       0x08
+#define AES_CTRL_SCA       0x10
+#define AES_CTRL_CBC       0x20
+
+#define AES_INTR_REG  0x0008
+
+#define AES_INTRA_PENDING (1 << 16)
+#define AES_INTRB_PENDING (1 << 17)
+
+#define AES_INTR_PENDING  (AES_INTRA_PENDING | AES_INTRB_PENDING)
+#define AES_INTR_MASK     0x07
+
+#define AES_SOURCEA_REG   0x0010
+#define AES_DSTA_REG      0x0014
+#define AES_LENA_REG      0x0018
+#define AES_WRITEKEY0_REG 0x0030
+#define AES_WRITEIV0_REG  0x0040
+
+/*  A very large counter that is used to gracefully bail out of an
+ *  operation in case of trouble
+ */
+
+#define AES_OP_TIMEOUT    0x50000
+
+struct geode_aes_tfm_ctx {
+	u8 key[AES_KEYSIZE_128];
+	union {
+		struct crypto_skcipher *skcipher;
+		struct crypto_cipher *cip;
+	} fallback;
+	u32 keylen;
+};
+
+#endif