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/arc/boot/Makefile | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 arch/arc/boot/Makefile (limited to 'arch/arc/boot/Makefile') diff --git a/arch/arc/boot/Makefile b/arch/arc/boot/Makefile new file mode 100644 index 000000000..5a8550124 --- /dev/null +++ b/arch/arc/boot/Makefile @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: GPL-2.0 + +# uImage build relies on mkimage being available on your host for ARC target +# You will need to build u-boot for ARC, rename mkimage to arc-elf32-mkimage +# and make sure it's reachable from your PATH + +OBJCOPYFLAGS= -O binary -R .note -R .note.gnu.build-id -R .comment -S + +LINUX_START_TEXT = $$($(READELF) -h vmlinux | \ + grep "Entry point address" | grep -o 0x.*) + +UIMAGE_LOADADDR = $(CONFIG_LINUX_LINK_BASE) +UIMAGE_ENTRYADDR = $(LINUX_START_TEXT) + +targets += vmlinux.bin +targets += vmlinux.bin.gz +targets += vmlinux.bin.lzma +targets += uImage.bin +targets += uImage.gz +targets += uImage.lzma + +$(obj)/vmlinux.bin: vmlinux FORCE + $(call if_changed,objcopy) + +$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE + $(call if_changed,gzip) + +$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE + $(call if_changed,lzma) + +$(obj)/uImage.bin: $(obj)/vmlinux.bin FORCE + $(call if_changed,uimage,none) + +$(obj)/uImage.gz: $(obj)/vmlinux.bin.gz FORCE + $(call if_changed,uimage,gzip) + +$(obj)/uImage.lzma: $(obj)/vmlinux.bin.lzma FORCE + $(call if_changed,uimage,lzma) -- cgit v1.3.1