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, 85 insertions, 0 deletions

diff --git a/net/sched/Makefile b/net/sched/Makefile
new file mode 100644
index 000000000..5078ea84e
--- /dev/null
+++ b/net/sched/Makefile
@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux Traffic Control Unit.
+#
+
+obj-y	:= sch_generic.o sch_mq.o
+
+obj-$(CONFIG_INET)		+= sch_frag.o
+obj-$(CONFIG_NET_SCHED)		+= sch_api.o sch_blackhole.o
+obj-$(CONFIG_NET_CLS)		+= cls_api.o
+obj-$(CONFIG_NET_CLS_ACT)	+= act_api.o
+obj-$(CONFIG_NET_ACT_POLICE)	+= act_police.o
+obj-$(CONFIG_NET_ACT_GACT)	+= act_gact.o
+obj-$(CONFIG_NET_ACT_MIRRED)	+= act_mirred.o
+obj-$(CONFIG_NET_ACT_SAMPLE)	+= act_sample.o
+obj-$(CONFIG_NET_ACT_NAT)	+= act_nat.o
+obj-$(CONFIG_NET_ACT_PEDIT)	+= act_pedit.o
+obj-$(CONFIG_NET_ACT_SIMP)	+= act_simple.o
+obj-$(CONFIG_NET_ACT_SKBEDIT)	+= act_skbedit.o
+obj-$(CONFIG_NET_ACT_CSUM)	+= act_csum.o
+obj-$(CONFIG_NET_ACT_MPLS)	+= act_mpls.o
+obj-$(CONFIG_NET_ACT_VLAN)	+= act_vlan.o
+obj-$(CONFIG_NET_ACT_BPF)	+= act_bpf.o
+obj-$(CONFIG_NET_ACT_CONNMARK)	+= act_connmark.o
+obj-$(CONFIG_NET_ACT_CTINFO)	+= act_ctinfo.o
+obj-$(CONFIG_NET_ACT_SKBMOD)	+= act_skbmod.o
+obj-$(CONFIG_NET_ACT_IFE)	+= act_ife.o
+obj-$(CONFIG_NET_IFE_SKBMARK)	+= act_meta_mark.o
+obj-$(CONFIG_NET_IFE_SKBPRIO)	+= act_meta_skbprio.o
+obj-$(CONFIG_NET_IFE_SKBTCINDEX)	+= act_meta_skbtcindex.o
+obj-$(CONFIG_NET_ACT_TUNNEL_KEY)+= act_tunnel_key.o
+obj-$(CONFIG_NET_ACT_CT)	+= act_ct.o
+obj-$(CONFIG_NET_ACT_GATE)	+= act_gate.o
+obj-$(CONFIG_NET_SCH_FIFO)	+= sch_fifo.o
+obj-$(CONFIG_NET_SCH_HTB)	+= sch_htb.o
+obj-$(CONFIG_NET_SCH_HFSC)	+= sch_hfsc.o
+obj-$(CONFIG_NET_SCH_RED)	+= sch_red.o
+obj-$(CONFIG_NET_SCH_GRED)	+= sch_gred.o
+obj-$(CONFIG_NET_SCH_INGRESS)	+= sch_ingress.o
+obj-$(CONFIG_NET_SCH_SFB)	+= sch_sfb.o
+obj-$(CONFIG_NET_SCH_SFQ)	+= sch_sfq.o
+obj-$(CONFIG_NET_SCH_TBF)	+= sch_tbf.o
+obj-$(CONFIG_NET_SCH_TEQL)	+= sch_teql.o
+obj-$(CONFIG_NET_SCH_PRIO)	+= sch_prio.o
+obj-$(CONFIG_NET_SCH_MULTIQ)	+= sch_multiq.o
+obj-$(CONFIG_NET_SCH_NETEM)	+= sch_netem.o
+obj-$(CONFIG_NET_SCH_DRR)	+= sch_drr.o
+obj-$(CONFIG_NET_SCH_PLUG)	+= sch_plug.o
+obj-$(CONFIG_NET_SCH_ETS)	+= sch_ets.o
+obj-$(CONFIG_NET_SCH_MQPRIO)	+= sch_mqprio.o
+obj-$(CONFIG_NET_SCH_MQPRIO_LIB) += sch_mqprio_lib.o
+obj-$(CONFIG_NET_SCH_SKBPRIO)	+= sch_skbprio.o
+obj-$(CONFIG_NET_SCH_CHOKE)	+= sch_choke.o
+obj-$(CONFIG_NET_SCH_QFQ)	+= sch_qfq.o
+obj-$(CONFIG_NET_SCH_CODEL)	+= sch_codel.o
+obj-$(CONFIG_NET_SCH_FQ_CODEL)	+= sch_fq_codel.o
+obj-$(CONFIG_NET_SCH_CAKE)	+= sch_cake.o
+obj-$(CONFIG_NET_SCH_FQ)	+= sch_fq.o
+obj-$(CONFIG_NET_SCH_HHF)	+= sch_hhf.o
+obj-$(CONFIG_NET_SCH_PIE)	+= sch_pie.o
+obj-$(CONFIG_NET_SCH_FQ_PIE)	+= sch_fq_pie.o
+obj-$(CONFIG_NET_SCH_CBS)	+= sch_cbs.o
+obj-$(CONFIG_NET_SCH_ETF)	+= sch_etf.o
+obj-$(CONFIG_NET_SCH_TAPRIO)	+= sch_taprio.o
+obj-$(CONFIG_NET_SCH_BPF)	+= bpf_qdisc.o
+obj-$(CONFIG_NET_SCH_DUALPI2)	+= sch_dualpi2.o
+
+obj-$(CONFIG_NET_CLS_U32)	+= cls_u32.o
+obj-$(CONFIG_NET_CLS_ROUTE4)	+= cls_route.o
+obj-$(CONFIG_NET_CLS_FW)	+= cls_fw.o
+obj-$(CONFIG_NET_CLS_BASIC)	+= cls_basic.o
+obj-$(CONFIG_NET_CLS_FLOW)	+= cls_flow.o
+obj-$(CONFIG_NET_CLS_CGROUP)	+= cls_cgroup.o
+obj-$(CONFIG_NET_CLS_BPF)	+= cls_bpf.o
+obj-$(CONFIG_NET_CLS_FLOWER)	+= cls_flower.o
+obj-$(CONFIG_NET_CLS_MATCHALL)	+= cls_matchall.o
+obj-$(CONFIG_NET_EMATCH)	+= ematch.o
+obj-$(CONFIG_NET_EMATCH_CMP)	+= em_cmp.o
+obj-$(CONFIG_NET_EMATCH_NBYTE)	+= em_nbyte.o
+obj-$(CONFIG_NET_EMATCH_U32)	+= em_u32.o
+obj-$(CONFIG_NET_EMATCH_META)	+= em_meta.o
+obj-$(CONFIG_NET_EMATCH_TEXT)	+= em_text.o
+obj-$(CONFIG_NET_EMATCH_CANID)	+= em_canid.o
+obj-$(CONFIG_NET_EMATCH_IPSET)	+= em_ipset.o
+obj-$(CONFIG_NET_EMATCH_IPT)	+= em_ipt.o