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, 73 insertions, 0 deletions

diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
new file mode 100644
index 000000000..e8d8d5d88
--- /dev/null
+++ b/drivers/misc/Makefile
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for misc devices that really don't fit anywhere else.
+#
+
+obj-$(CONFIG_IBMVMC)		+= ibmvmc.o
+obj-$(CONFIG_AD525X_DPOT)	+= ad525x_dpot.o
+obj-$(CONFIG_AD525X_DPOT_I2C)	+= ad525x_dpot-i2c.o
+obj-$(CONFIG_AD525X_DPOT_SPI)	+= ad525x_dpot-spi.o
+obj-$(CONFIG_ATMEL_SSC)		+= atmel-ssc.o
+obj-$(CONFIG_DUMMY_IRQ)		+= dummy-irq.o
+obj-$(CONFIG_ICS932S401)	+= ics932s401.o
+obj-$(CONFIG_LKDTM)		+= lkdtm/
+obj-$(CONFIG_TI_FPC202)		+= ti_fpc202.o
+obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o
+obj-$(CONFIG_TIFM_7XX1)       	+= tifm_7xx1.o
+obj-$(CONFIG_PHANTOM)		+= phantom.o
+obj-$(CONFIG_RPMB)		+= rpmb-core.o
+obj-$(CONFIG_QCOM_COINCELL)	+= qcom-coincell.o
+obj-$(CONFIG_QCOM_FASTRPC)	+= fastrpc.o
+obj-$(CONFIG_SENSORS_BH1770)	+= bh1770glc.o
+obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
+obj-$(CONFIG_KGDB_TESTS)	+= kgdbts.o
+obj-$(CONFIG_SMPRO_ERRMON)	+= smpro-errmon.o
+obj-$(CONFIG_SMPRO_MISC)	+= smpro-misc.o
+obj-$(CONFIG_CS5535_MFGPT)	+= cs5535-mfgpt.o
+obj-$(CONFIG_GEHC_ACHC)		+= gehc-achc.o
+obj-$(CONFIG_HP_ILO)		+= hpilo.o
+obj-$(CONFIG_APDS9802ALS)	+= apds9802als.o
+obj-$(CONFIG_ISL29003)		+= isl29003.o
+obj-$(CONFIG_ISL29020)		+= isl29020.o
+obj-$(CONFIG_SENSORS_TSL2550)	+= tsl2550.o
+obj-$(CONFIG_DS1682)		+= ds1682.o
+obj-$(CONFIG_C2PORT)		+= c2port/
+obj-$(CONFIG_HMC6352)		+= hmc6352.o
+obj-y				+= eeprom/
+obj-y				+= cb710/
+obj-$(CONFIG_VMWARE_BALLOON)	+= vmw_balloon.o
+obj-$(CONFIG_PCH_PHUB)		+= pch_phub.o
+obj-y				+= lis3lv02d/
+obj-$(CONFIG_ALTERA_STAPL)	+=altera-stapl/
+obj-$(CONFIG_INTEL_MEI)		+= mei/
+obj-$(CONFIG_VMWARE_VMCI)	+= vmw_vmci/
+obj-$(CONFIG_LATTICE_ECP3_CONFIG)	+= lattice-ecp3-config.o
+obj-$(CONFIG_SRAM)		+= sram.o
+obj-$(CONFIG_SRAM_EXEC)		+= sram-exec.o
+obj-$(CONFIG_GENWQE)		+= genwqe/
+obj-$(CONFIG_DW_XDATA_PCIE)	+= dw-xdata-pcie.o
+obj-$(CONFIG_PCI_ENDPOINT_TEST)	+= pci_endpoint_test.o
+obj-$(CONFIG_OCXL)		+= ocxl/
+obj-$(CONFIG_BCM_VK)		+= bcm-vk/
+obj-y				+= cardreader/
+obj-$(CONFIG_PVPANIC)   	+= pvpanic/
+obj-$(CONFIG_UACCE)		+= uacce/
+obj-$(CONFIG_XILINX_SDFEC)	+= xilinx_sdfec.o
+obj-$(CONFIG_NTSYNC)		+= ntsync.o
+obj-$(CONFIG_HI6421V600_IRQ)	+= hi6421v600-irq.o
+obj-$(CONFIG_OPEN_DICE)		+= open-dice.o
+obj-$(CONFIG_GP_PCI1XXXX)	+= mchp_pci1xxxx/
+obj-$(CONFIG_VCPU_STALL_DETECTOR)	+= vcpu_stall_detector.o
+obj-$(CONFIG_TMR_MANAGER)      += xilinx_tmr_manager.o
+obj-$(CONFIG_TMR_INJECT)	+= xilinx_tmr_inject.o
+obj-$(CONFIG_TPS6594_ESM)	+= tps6594-esm.o
+obj-$(CONFIG_TPS6594_PFSM)	+= tps6594-pfsm.o
+obj-$(CONFIG_NSM)		+= nsm.o
+obj-$(CONFIG_MARVELL_CN10K_DPI)	+= mrvl_cn10k_dpi.o
+lan966x-pci-objs		:= lan966x_pci.o
+lan966x-pci-objs		+= lan966x_pci.dtbo.o
+obj-$(CONFIG_MCHP_LAN966X_PCI)	+= lan966x-pci.o
+obj-y				+= keba/
+obj-y				+= amd-sbi/
+obj-$(CONFIG_MISC_RP1)		+= rp1/
+obj-$(CONFIG_INTEL_SSEI)	+= issei/