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 --- drivers/misc/pvpanic/Kconfig | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 drivers/misc/pvpanic/Kconfig (limited to 'drivers/misc/pvpanic/Kconfig') diff --git a/drivers/misc/pvpanic/Kconfig b/drivers/misc/pvpanic/Kconfig new file mode 100644 index 000000000..12d40a21f --- /dev/null +++ b/drivers/misc/pvpanic/Kconfig @@ -0,0 +1,27 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Pvpanic Kconfig +# +# Copyright (C) 2021 Oracle. +# + +config PVPANIC + bool "pvpanic device support" + help + This option allows to select a specific pvpanic device driver. + pvpanic is a paravirtualized device provided by QEMU; it lets + a virtual machine (guest) communicate panic events to the host. + +config PVPANIC_MMIO + tristate "pvpanic MMIO device support" + depends on HAS_IOMEM && (ACPI || OF) && PVPANIC + help + This driver provides support for the MMIO pvpanic device. + +config PVPANIC_PCI + tristate "pvpanic PCI device support" + depends on PCI && PVPANIC + help + This driver provides support for the PCI pvpanic device. + pvpanic is a paravirtualized device provided by QEMU which + forwards the panic events from the guest to the host. -- cgit v1.3.1