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, 88 insertions, 0 deletions

diff --git a/drivers/net/Makefile b/drivers/net/Makefile
new file mode 100644
index 000000000..88e4c485d
--- /dev/null
+++ b/drivers/net/Makefile
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux network device drivers.
+#
+
+#
+# Networking Core Drivers
+#
+obj-$(CONFIG_BONDING) += bonding/
+obj-$(CONFIG_IPVLAN) += ipvlan/
+obj-$(CONFIG_IPVTAP) += ipvlan/
+obj-$(CONFIG_DUMMY) += dummy.o
+obj-$(CONFIG_WIREGUARD) += wireguard/
+obj-$(CONFIG_OVPN) += ovpn/
+obj-$(CONFIG_EQUALIZER) += eql.o
+obj-$(CONFIG_IFB) += ifb.o
+obj-$(CONFIG_MACSEC) += macsec.o
+obj-$(CONFIG_AMT) += amt.o
+obj-$(CONFIG_MACVLAN) += macvlan.o
+obj-$(CONFIG_MACVTAP) += macvtap.o
+obj-$(CONFIG_MII) += mii.o
+obj-$(CONFIG_MDIO) += mdio.o
+obj-$(CONFIG_NET) += loopback.o
+obj-$(CONFIG_NETCONSOLE) += netconsole.o
+obj-$(CONFIG_NETKIT) += netkit.o
+obj-y += phy/
+obj-y += pse-pd/
+obj-y += mdio/
+obj-y += pcs/
+obj-$(CONFIG_RIONET) += rionet.o
+obj-$(CONFIG_NET_TEAM) += team/
+obj-$(CONFIG_TUN) += tun.o
+obj-$(CONFIG_TAP) += tap.o
+obj-$(CONFIG_VETH) += veth.o
+obj-$(CONFIG_VIRTIO_NET) += virtio_net.o
+obj-$(CONFIG_VXLAN) += vxlan/
+obj-$(CONFIG_GENEVE) += geneve.o
+obj-$(CONFIG_BAREUDP) += bareudp.o
+obj-$(CONFIG_GTP) += gtp.o
+obj-$(CONFIG_NLMON) += nlmon.o
+obj-$(CONFIG_PFCP) += pfcp.o
+obj-$(CONFIG_NET_VRF) += vrf.o
+obj-$(CONFIG_VSOCKMON) += vsockmon.o
+obj-$(CONFIG_MHI_NET) += mhi_net.o
+
+#
+# Networking Drivers
+#
+obj-$(CONFIG_ARCNET) += arcnet/
+obj-$(CONFIG_CAN) += can/
+ifdef CONFIG_NET_DSA
+obj-y += dsa/
+endif
+obj-$(CONFIG_ETHERNET) += ethernet/
+obj-$(CONFIG_FDDI) += fddi/
+obj-$(CONFIG_QCOM_IPA) += ipa/
+obj-$(CONFIG_PLIP) += plip/
+obj-$(CONFIG_PPP) += ppp/
+obj-$(CONFIG_PPP_ASYNC) += ppp/
+obj-$(CONFIG_PPP_BSDCOMP) += ppp/
+obj-$(CONFIG_PPP_DEFLATE) += ppp/
+obj-$(CONFIG_PPP_MPPE) += ppp/
+obj-$(CONFIG_PPP_SYNC_TTY) += ppp/
+obj-$(CONFIG_PPPOE) += ppp/
+obj-$(CONFIG_PPPOL2TP) += ppp/
+obj-$(CONFIG_PPTP) += ppp/
+obj-$(CONFIG_SLIP) += slip/
+obj-$(CONFIG_SLHC) += slip/
+obj-$(CONFIG_SUNGEM_PHY) += sungem_phy.o
+obj-$(CONFIG_WAN) += wan/
+obj-$(CONFIG_WLAN) += wireless/
+obj-$(CONFIG_IEEE802154) += ieee802154/
+obj-$(CONFIG_WWAN) += wwan/
+obj-$(CONFIG_MCTP) += mctp/
+
+obj-$(CONFIG_VMXNET3) += vmxnet3/
+obj-$(CONFIG_XEN_NETDEV_FRONTEND) += xen-netfront.o
+obj-$(CONFIG_XEN_NETDEV_BACKEND) += xen-netback/
+
+obj-$(CONFIG_USB_NET_DRIVERS) += usb/
+
+obj-$(CONFIG_HYPERV_NET) += hyperv/
+obj-$(CONFIG_NTB_NETDEV) += ntb_netdev.o
+
+obj-$(CONFIG_FUJITSU_ES) += fjes/
+obj-$(CONFIG_USB4_NET) += thunderbolt/
+obj-$(CONFIG_NETDEVSIM) += netdevsim/
+obj-$(CONFIG_NET_FAILOVER) += net_failover.o