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, 29 insertions, 0 deletions

diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
new file mode 100644
index 000000000..ff466ea97
--- /dev/null
+++ b/net/bluetooth/Makefile
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux Bluetooth subsystem.
+#
+
+obj-$(CONFIG_BT)	+= bluetooth.o
+obj-$(CONFIG_BT_RFCOMM)	+= rfcomm/
+obj-$(CONFIG_BT_BNEP)	+= bnep/
+obj-$(CONFIG_BT_HIDP)	+= hidp/
+obj-$(CONFIG_BT_6LOWPAN) += bluetooth_6lowpan.o
+
+bluetooth_6lowpan-y := 6lowpan.o
+
+bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
+	hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o lib.o \
+	ecdh_helper.o mgmt_util.o mgmt_config.o hci_codec.o eir.o hci_sync.o \
+	hci_drv.o
+
+bluetooth-$(CONFIG_DEV_COREDUMP) += coredump.o
+
+bluetooth-$(CONFIG_BT_BREDR) += sco.o
+bluetooth-$(CONFIG_BT_LE) += iso.o
+bluetooth-$(CONFIG_BT_LEDS) += leds.o
+bluetooth-$(CONFIG_BT_MSFTEXT) += msft.o
+bluetooth-$(CONFIG_BT_AOSPEXT) += aosp.o
+bluetooth-$(CONFIG_BT_DEBUGFS) += hci_debugfs.o
+bluetooth-$(CONFIG_BT_SELFTEST) += selftest.o
+
+CONTEXT_ANALYSIS := y