From ff917923f4fb9c83717ba135ee47d7e4c1567bb7 Mon Sep 17 00:00:00 2001 From: Muhammad Bilal Date: Tue, 28 Jul 2026 17:54:55 +0500 Subject: staging: rtl8723bs: fix OOB read in rtw_action_frame_parse() 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 Link: https://patch.msgid.link/20260728125456.32359-3-meatuni001@gmail.com Signed-off-by: Greg Kroah-Hartman --- arch/microblaze/Makefile | 93 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 arch/microblaze/Makefile (limited to 'arch/microblaze/Makefile') diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile new file mode 100644 index 000000000..02e6be9c5 --- /dev/null +++ b/arch/microblaze/Makefile @@ -0,0 +1,93 @@ +# SPDX-License-Identifier: GPL-2.0 +KBUILD_DEFCONFIG := mmu_defconfig + +UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\" + +# What CPU version are we building for, and crack it open +# as major.minor.rev +CPU_VER := $(CONFIG_XILINX_MICROBLAZE0_HW_VER) +CPU_MAJOR := $(word 1, $(subst ., , $(CPU_VER))) +CPU_MINOR := $(word 2, $(subst ., , $(CPU_VER))) +CPU_REV := $(word 3, $(subst ., , $(CPU_VER))) + +export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV + +# Use cpu-related CONFIG_ vars to set compile options. +# The various CONFIG_XILINX cpu features options are integers 0/1/2... +# rather than bools y/n + +# Work out HW multipler support. This is tricky. +# 1. Spartan2 has no HW multipliers. +# 2. MicroBlaze v3.x always uses them, except in Spartan 2 +# 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings +ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY))) + ifeq ($(CPU_MAJOR),3) + CPUFLAGS-1 += -mno-xl-soft-mul + else + # USE_HW_MUL can be 0, 1, or 2, defining a hierarchy of HW Mul support. + CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high + CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul + endif +endif +CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div +CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift +CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare + +ifdef CONFIG_CPU_BIG_ENDIAN +KBUILD_CFLAGS += -mbig-endian +KBUILD_AFLAGS += -mbig-endian +KBUILD_LDFLAGS += -EB +else +KBUILD_CFLAGS += -mlittle-endian +KBUILD_AFLAGS += -mlittle-endian +KBUILD_LDFLAGS += -EL +endif + +CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER)) + +# r31 holds current when in kernel mode +KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-y) $(CPUFLAGS-1) $(CPUFLAGS-2) + +libs-y += arch/microblaze/lib/ + +boot := arch/microblaze/boot + +# Are we making a simpleImage. target? If so, crack out the boardname +DTB:=$(subst simpleImage.,,$(filter simpleImage.%, $(MAKECMDGOALS))) + +export DTB + +all: linux.bin + +archheaders: + $(Q)$(MAKE) $(build)=arch/microblaze/kernel/syscalls all + +PHONY += linux.bin linux.bin.gz linux.bin.ub +linux.bin.ub linux.bin.gz: linux.bin +linux.bin: vmlinux +linux.bin linux.bin.gz linux.bin.ub: + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + @echo 'Kernel: $(boot)/$@ is ready' ' (#'$(or $(KBUILD_BUILD_VERSION),`cat .version`)')' + +PHONY += simpleImage.$(DTB) +simpleImage.$(DTB): vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(addprefix $(boot)/$@., ub unstrip strip) + @echo 'Kernel: $(boot)/$@ is ready' ' (#'$(or $(KBUILD_BUILD_VERSION),`cat .version`)')' + +define archhelp + echo '* linux.bin - Create raw binary' + echo ' linux.bin.gz - Create compressed raw binary' + echo ' linux.bin.ub - Create U-Boot wrapped raw binary' + echo ' simpleImage.
- Create the following images with
.dtb linked in' + echo ' simpleImage.
: raw image' + echo ' simpleImage.
.ub : raw image with U-Boot header' + echo ' simpleImage.
.unstrip: ELF (identical to vmlinux)' + echo ' simpleImage.
.strip : stripped ELF' + echo ' Targets with
embed a device tree blob inside the image' + echo ' These targets support board with firmware that does not' + echo ' support passing a device tree directly. Replace
with the' + echo ' name of a dts file from the arch/microblaze/boot/dts/ directory' + echo ' (minus the .dts extension).' +endef + +MRPROPER_FILES += $(boot)/simpleImage.* -- cgit v1.3.1