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, 54 insertions, 0 deletions

diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
new file mode 100644
index 000000000..e6b1c1180
--- /dev/null
+++ b/drivers/bluetooth/Makefile
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux Bluetooth HCI device drivers.
+#
+
+obj-$(CONFIG_BT_HCIVHCI)	+= hci_vhci.o
+obj-$(CONFIG_BT_HCIUART)	+= hci_uart.o
+obj-$(CONFIG_BT_HCIBCM203X)	+= bcm203x.o
+obj-$(CONFIG_BT_HCIBCM4377)	+= hci_bcm4377.o
+obj-$(CONFIG_BT_HCIBPA10X)	+= bpa10x.o
+obj-$(CONFIG_BT_HCIBFUSB)	+= bfusb.o
+
+obj-$(CONFIG_BT_HCIBTUSB)	+= btusb.o
+obj-$(CONFIG_BT_HCIBTSDIO)	+= btsdio.o
+
+obj-$(CONFIG_BT_INTEL)		+= btintel.o
+obj-$(CONFIG_BT_INTEL_PCIE)	+= btintel_pcie.o btintel.o
+obj-$(CONFIG_BT_ATH3K)		+= ath3k.o
+obj-$(CONFIG_BT_MRVL)		+= btmrvl.o
+obj-$(CONFIG_BT_MRVL_SDIO)	+= btmrvl_sdio.o
+obj-$(CONFIG_BT_MTKSDIO)	+= btmtksdio.o
+obj-$(CONFIG_BT_MTKUART)	+= btmtkuart.o
+obj-$(CONFIG_BT_QCOMSMD)	+= btqcomsmd.o
+obj-$(CONFIG_BT_BCM)		+= btbcm.o
+obj-$(CONFIG_BT_RTL)		+= btrtl.o
+obj-$(CONFIG_BT_QCA)		+= btqca.o
+obj-$(CONFIG_BT_MTK)		+= btmtk.o
+
+obj-$(CONFIG_BT_VIRTIO)		+= virtio_bt.o
+obj-$(CONFIG_BT_NXPUART)	+= btnxpuart.o
+
+obj-$(CONFIG_BT_HCIUART_NOKIA)	+= hci_nokia.o
+
+obj-$(CONFIG_BT_HCIRSI)		+= btrsi.o
+
+btmrvl-y			:= btmrvl_main.o
+btmrvl-$(CONFIG_DEBUG_FS)	+= btmrvl_debugfs.o
+
+hci_uart-y				:= hci_ldisc.o
+hci_uart-$(CONFIG_BT_HCIUART_SERDEV)	+= hci_serdev.o
+hci_uart-$(CONFIG_BT_HCIUART_H4)	+= hci_h4.o
+hci_uart-$(CONFIG_BT_HCIUART_BCSP)	+= hci_bcsp.o
+hci_uart-$(CONFIG_BT_HCIUART_LL)	+= hci_ll.o
+hci_uart-$(CONFIG_BT_HCIUART_ATH3K)	+= hci_ath.o
+hci_uart-$(CONFIG_BT_HCIUART_3WIRE)	+= hci_h5.o
+hci_uart-$(CONFIG_BT_HCIUART_INTEL)	+= hci_intel.o
+hci_uart-$(CONFIG_BT_HCIUART_BCM)	+= hci_bcm.o
+hci_uart-$(CONFIG_BT_HCIUART_QCA)	+= hci_qca.o
+hci_uart-$(CONFIG_BT_HCIUART_AG6XX)	+= hci_ag6xx.o
+hci_uart-$(CONFIG_BT_HCIUART_MRVL)	+= hci_mrvl.o
+hci_uart-$(CONFIG_BT_HCIUART_AML)	+= hci_aml.o
+hci_uart-objs				:= $(hci_uart-y)
+
+CONTEXT_ANALYSIS := y