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, 82 insertions, 0 deletions

diff --git a/tools/testing/cxl/Kbuild b/tools/testing/cxl/Kbuild
new file mode 100644
index 000000000..2be1df80f
--- /dev/null
+++ b/tools/testing/cxl/Kbuild
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: GPL-2.0
+ldflags-y += --wrap=acpi_table_parse_cedt
+ldflags-y += --wrap=is_acpi_device_node
+ldflags-y += --wrap=acpi_evaluate_integer
+ldflags-y += --wrap=acpi_pci_find_root
+ldflags-y += --wrap=nvdimm_bus_register
+ldflags-y += --wrap=cxl_await_media_ready
+ldflags-y += --wrap=devm_cxl_add_rch_dport
+ldflags-y += --wrap=cxl_endpoint_parse_cdat
+ldflags-y += --wrap=devm_cxl_endpoint_decoders_setup
+ldflags-y += --wrap=hmat_get_extended_linear_cache_size
+ldflags-y += --wrap=devm_cxl_add_dport_by_dev
+ldflags-y += --wrap=devm_cxl_switch_port_decoders_setup
+ldflags-y += --wrap=walk_hmem_resources
+ldflags-y += --wrap=region_intersects
+ldflags-y += --wrap=region_intersects_soft_reserve
+
+DRIVERS := ../../../drivers
+DAX_HMEM_SRC := $(DRIVERS)/dax/hmem
+CXL_SRC := $(DRIVERS)/cxl
+CXL_CORE_SRC := $(DRIVERS)/cxl/core
+ccflags-y := -I$(srctree)/drivers/cxl/
+ccflags-y += -D__mock=__weak
+ccflags-y += -DCXL_TEST_ENABLE=1
+ccflags-y += -DTRACE_INCLUDE_PATH=$(CXL_CORE_SRC) -I$(srctree)/drivers/cxl/core/
+
+obj-m += cxl_acpi.o
+
+cxl_acpi-y := $(CXL_SRC)/acpi.o
+cxl_acpi-y += mock_acpi.o
+cxl_acpi-y += config_check.o
+cxl_acpi-y += cxl_acpi_test.o
+
+obj-m += cxl_pmem.o
+
+cxl_pmem-y := $(CXL_SRC)/pmem.o
+cxl_pmem-y += $(CXL_SRC)/security.o
+cxl_pmem-y += config_check.o
+cxl_pmem-y += cxl_pmem_test.o
+
+obj-m += cxl_port.o
+
+cxl_port-y := $(CXL_SRC)/port.o
+cxl_port-y += config_check.o
+cxl_port-y += cxl_port_test.o
+
+
+obj-m += cxl_mem.o
+
+cxl_mem-y := $(CXL_SRC)/mem.o
+cxl_mem-y += config_check.o
+cxl_mem-y += cxl_mem_test.o
+
+obj-m += cxl_core.o
+
+cxl_core-y := $(CXL_CORE_SRC)/port.o
+cxl_core-y += $(CXL_CORE_SRC)/pmem.o
+cxl_core-y += $(CXL_CORE_SRC)/regs.o
+cxl_core-y += $(CXL_CORE_SRC)/memdev.o
+cxl_core-y += $(CXL_CORE_SRC)/mbox.o
+cxl_core-y += $(CXL_CORE_SRC)/pci.o
+cxl_core-y += $(CXL_CORE_SRC)/hdm.o
+cxl_core-y += $(CXL_CORE_SRC)/pmu.o
+cxl_core-y += $(CXL_CORE_SRC)/cdat.o
+cxl_core-$(CONFIG_TRACING) += $(CXL_CORE_SRC)/trace.o
+cxl_core-$(CONFIG_CXL_REGION) += $(CXL_CORE_SRC)/region.o $(CXL_CORE_SRC)/region_pmem.o $(CXL_CORE_SRC)/region_dax.o
+cxl_core-$(CONFIG_CXL_MCE) += $(CXL_CORE_SRC)/mce.o
+cxl_core-$(CONFIG_CXL_FEATURES) += $(CXL_CORE_SRC)/features.o
+cxl_core-$(CONFIG_CXL_EDAC_MEM_FEATURES) += $(CXL_CORE_SRC)/edac.o
+cxl_core-$(CONFIG_CXL_RAS) += $(CXL_CORE_SRC)/ras.o
+cxl_core-$(CONFIG_CXL_RAS) += $(CXL_CORE_SRC)/ras_rch.o
+cxl_core-$(CONFIG_CXL_ATL) += $(CXL_CORE_SRC)/atl.o
+cxl_core-y += config_check.o
+cxl_core-y += cxl_core_test.o
+cxl_core-y += cxl_core_exports.o
+
+obj-m += dax_hmem.o
+dax_hmem-y := $(DAX_HMEM_SRC)/hmem.o
+
+KBUILD_CFLAGS := $(filter-out -Wmissing-prototypes -Wmissing-declarations, $(KBUILD_CFLAGS))
+
+obj-m += test/