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 --- Documentation/driver-api/index.rst | 152 +++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100644 Documentation/driver-api/index.rst (limited to 'Documentation/driver-api/index.rst') diff --git a/Documentation/driver-api/index.rst b/Documentation/driver-api/index.rst new file mode 100644 index 000000000..6601a2586 --- /dev/null +++ b/Documentation/driver-api/index.rst @@ -0,0 +1,152 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============================== +Driver implementer's API guide +============================== + +The kernel offers a wide variety of interfaces to support the development +of device drivers. This document is an only somewhat organized collection +of some of those interfaces — it will hopefully get better over time! The +available subsections can be seen below. + + +General information for driver authors +====================================== + +This section contains documentation that should, at some point or other, be +of interest to most developers working on device drivers. + +.. toctree:: + :maxdepth: 1 + + basics + driver-model/index + device_link + infrastructure + ioctl + pm/index + +Useful support libraries +======================== + +This section contains documentation that should, at some point or other, be +of interest to most developers working on device drivers. + +.. toctree:: + :maxdepth: 1 + + early-userspace/index + connector + device-io + devfreq + dma-buf + component + io-mapping + io_ordering + uio-howto + vfio-mediated-device + vfio + vfio-pci-device-specific-driver-acceptance + +Bus-level documentation +======================= + +.. toctree:: + :maxdepth: 1 + + auxiliary_bus + cxl/index + eisa + firewire + i3c/index + isa + men-chameleon-bus + pci/index + rapidio/index + slimbus + usb/index + virtio/index + vme + w1 + xillybus + + +Subsystem-specific APIs +======================= + +.. toctree:: + :maxdepth: 1 + + 80211/index + acpi/index + backlight/lp855x-driver.rst + clk + coco/index + console + crypto/index + dmaengine/index + dpll + edac + extcon + firmware/index + fpga/index + frame-buffer + aperture + generic-counter + generic_pt + gpio/index + hsi + hte/index + hw-recoverable-errors + i2c + iio/index + infiniband + input + interconnect + ipmb + ipmi + issei/index + libata + mailbox + md/index + media/index + mei/index + memory-devices/index + message-based + misc_devices + miscellaneous + mmc/index + mtd/index + mtdnand + nfc/index + ntb + nvdimm/index + nvmem + parport-lowlevel + phy/index + pin-control + pldmfw/index + pps + ptp + pwm + pwrseq + regulator + reset + rfkill + s390-drivers + scsi + serial/index + sm501 + soundwire/index + spi + surface_aggregator/index + switchtec + sync_file + target + tee + thermal/index + tty/index + wbrf + wmi + xilinx/index + zorro -- cgit v1.3.1