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, 30 insertions, 0 deletions

diff --git a/tools/testing/radix-tree/Makefile b/tools/testing/radix-tree/Makefile
new file mode 100644
index 000000000..b2a6660bb
--- /dev/null
+++ b/tools/testing/radix-tree/Makefile
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0
+
+.PHONY: clean
+
+TARGETS = main idr-test multiorder xarray maple
+CORE_OFILES = $(SHARED_OFILES) xarray.o maple.o test.o
+OFILES = main.o $(CORE_OFILES) regression1.o regression2.o \
+	 regression3.o regression4.o tag_check.o multiorder.o idr-test.o \
+	iteration_check.o iteration_check_2.o benchmark.o
+
+targets: generated/map-shift.h generated/bit-length.h $(TARGETS)
+
+include ../shared/shared.mk
+
+main:	$(OFILES)
+
+xarray.o: ../../../lib/test_xarray.c
+idr-test.o: ../../../lib/test_ida.c
+idr-test: idr-test.o $(CORE_OFILES)
+
+xarray: $(CORE_OFILES) xarray.o
+
+maple: $(CORE_OFILES) maple.o
+
+multiorder: multiorder.o $(CORE_OFILES)
+
+clean:
+	$(RM) $(TARGETS) *.o radix-tree.c idr.c generated/*
+
+$(OFILES): $(SHARED_DEPS) *.h