Research Window: Past 3 days (2026-09-25 11:00 ~ 2026-09-28 11:00 Beijing Time) Sources: RT-Thread official news API, community forum article interface, GitHub (org: RT-Thread main repo commits / PR / Issue / Releases, package index, device support packages and Studio BSP organization, vendor downstream organizations, topic:rt-thread ecosystem search), Google News aggregation (Chinese and English, via proxy), WeChat official account channels and registration form verification

Index

  • I. Kernel and Version Updates
    • Two maintenance fixes merged into mainline: GD32VW553H-EVAL build cleanup and ipc file reorganization (09-26 ~ 09-27)
    • Two robustness fixes added to review queue: STM32 linker script stack alignment and devtmpfs path out-of-bounds (09-27)
    • FinSH path completion heap overflow defect report: submitter has claimed and plans to fix (09-26)
    • Official news API sees no new entries for the thirty-ninth consecutive day (09-28)
  • II. Official and Community Events
    • 2026 Roadshow Offline Training visits 6 cities, registration opens (09-27)
    • Forum tutorial “MCU Linker Script ‘Upgrade’”: Orphan Sections and Alignment Handling (09-28)
  • III. Ecosystem and Vendor Adaptation
    • WCH CH32V003F4P6-EVT board support proposal enters review (09-25)
    • CANopen ecosystem dual repositories launch MkDocs documentation site (09-28)
    • AWTK open-source license switches to Apache 2.0 (09-26)
  • IV. Industry Applications
    • Luckfox RV1103 single-chip drone prototype: RISC-V core runs RT-Thread flight controller (09-27)
  • V. Summary and Trend Observations
    • Trends over the past three days (09-25 ~ 09-28)
    • Limitations and deduplication notes
  • Appendix: Source Verification Table

I. Kernel and Version Dynamics

1.1 Mainline merges two maintenance fixes: GD32VW553H-EVAL build cleanup and ipc file tidy-up (09-26 ~ 09-27)

Date: 2026-09-26 19:58 / 09-27 12:18 (Beijing time, merge time)　Source: PR #11837, PR #11832, merge commit b40aeb146, merge commit 05badce95

The mainline merged two small fixes within the window. The first (#11837) fixes a failure in the CI cleanup stage of the GD32VW553H-EVAL BSP: the riscv-none job exited during the scons -c cleanup step after a successful build and packaging — the root cause being that the package pre-check registered in SConstruct (bsp_pkg_check) also ran unconditionally in cleanup mode, while during cleanup the package may already have been removed or not yet fetched; the fix short-circuits this check directly in clean mode (1 file, +3/-0), leaving the check logic for normal builds unchanged. The proposal was submitted by the GitHub Copilot coding agent (copilot-swe-agent), with the agent session triggered by a maintainer and the change completed about 3 minutes after the issue was opened; it was merged by Rbb666 on 09-26 19:58. The second (#11832) removes a redundant __RT_IPC_SOURCE__ macro definition from components/drivers/ipc/SConscript (1 file, +1/-1), part of clearing the 09-24 review queue, merged on 09-27 12:18.

1.2 Review queue gains two robustness fixes: STM32 linker script stack alignment and devtmpfs path out-of-bounds (09-27)

Date: 2026-09-27 20:57 ~ 21:11 (Beijing time, creation time)　Source: PR #11841, PR #11842

The review queue gained two robustness fixes within the window. The first (#11841) corrects stack alignment in all STM32-family linker scripts: changing the .stack section’s ALIGN(4) to ALIGN(8) to comply with the ARM AAPCS requirement that the stack pointer be 8-byte aligned at public function boundaries, corresponding to the old defect #7527 reported in 2023-05 (4-byte stack alignment causing incorrect double argument passing in variadic functions); the change covers 12 templates and 98 boards, 110 linker scripts in total (+220/-220), without touching any board’s memory layout. The second (#11842) fixes a stack buffer overflow in devfs: _path_separate() and _get_subdir() in devtmpfs.c do not accept a buffer length parameter, so a single path component exceeding 255 bytes causes an out-of-bounds write (up to about 3.8KB out of bounds, with the written content and length controlled by the caller, potentially overwriting the return address); the fix aligns devfs with the existing validation in tmpfs (out-of-bounds returns -ENAMETOOLONG, 1 file +48/-8), with the commit signed with the [HUST CSE] prefix. Both are currently under review.

1.3 FinSH path completion heap overflow defect report: submitter has claimed it and plans to fix (09-26)

Date: 2026-09-26 03:55 (Beijing time, creation time)　Source: Issue #11839

The community filed a high-severity defect report for the FinSH component within the window: when triggering path auto-completion (Tab key) in msh, the msh_auto_complete_path logic does not perform strict bounds checking when concatenating the current working directory with user input, so an overly long or deeply nested path can cause a heap buffer out-of-bounds write (CWE-122), affecting v5.3.0 and the current mainline, as well as boards such as STM32F407-ATK. The issue includes a defect description and labels (bug, in progress, etc.); the submitter Acen28 claimed the issue the same day and plans to submit a fix themselves. This is another memory-safety lead advanced by community auditing, following the devtmpfs out-of-bounds issue (see 1.2).

1.4 Official news feed sees no new items for the thirty-ninth consecutive day (09-28)

Date: 2026-09-28 (verification time)　Source: RT-Thread official news feed

The latest entry in the archive returned by the official news feed (rt_org category) is still dated 2026-06-17, with no new items within the window, marking the thirty-ninth consecutive day without updates; the official website’s news list page is still rendered dynamically on the front end and cannot be read directly. Product and event information continues to be first released via the forum, WeChat official account, and GitHub channels — this issue’s announcement of the roadshow training came from the WeChat official account (see 2.1).

II. Official and Community Activities

2.1 2026 roadshow offline training visits 6 cities, registration opens (09-27)

Date: 2026-09-27 11:50 (publish time)　Source: EE Times China report (repost), registration form

The WeChat official account “RT-Thread操作系统” published the announcement of a new round of roadshow offline training within the window: the 2026 training visits 6 cities with 6 sessions in total, all scheduled on Saturdays — Shanghai, Beijing (October 24), Shenzhen, Wuhan (October 31), Xi’an (November 7), and Hangzhou (November 14). The training includes theory courses, demo presentations, and hands-on practice, and offers face-to-face Q&A with the official team; registration is free (Jinshuju form, credited to Shanghai RT-Thread Electronics Technology Co., Ltd.), attendees receive a gift, and the courses are taught by the RT-Thread expert team. Industry media (EE Times China) followed up with a repost the same day. Compared with 7 cities and 3 batches in 2025, this round is compressed to 6 cities and 4 batches.

2.2 Forum tutorial “MCU Linker Script ‘Upgrade’”: orphan sections and alignment handling (09-28)

Date: 2026-09-28 08:17 (publish time, updated 11:03)　Source: forum article 54cb40d33610387a, companion video on Bilibili

An update to community author “大目熊”’s MCU low-level series (the previous installment, “MCU GNU Linker Script”, was covered on 09-22): this installment takes on orphan sections and alignment issues in more depth. Key points: use -Wl,--warn-orphan to have the linker list sections not explicitly placed; classify sections by the SHF_ALLOC flag into those needed at runtime (.text/.rodata/.data/.bss, which require allocated memory regions) and those not needed (.debug_*, .comment, .ARM.attributes, symbol tables, etc., listed explicitly but not allocated), and place each one accordingly; .ARM.exidx/.ARM.extab belong to the ALLOC category and must be placed with start/end symbols exported; finally, wrap up with 4-byte alignment, verifying that all linker warnings are eliminated and the map file matches the script description. Includes a companion video on Bilibili; this is community tutorial content.

III. Ecosystem and Vendor Adaptation

3.1 Qinheng CH32V003F4P6-EVT Board Support Proposal Enters Review (09-25)

Date: 2026-09-25 21:11 (Beijing time, creation time; updated on 09-27)　Source: PR #11838

Contributor cms19859230182-lang (previously the author of the CH32V203 BSP and ESP32-C6 proposals) submitted a BSP proposal for the Qinheng CH32V003F4P6-EVT development board. The CH32V003F4P6 features a RISC-V core, 48MHz clock, 16KB Flash, 2KB SRAM, and TSSOP20 package; the default image enables only UART1 (TX PD5 / RX PD6, 115200 into msh), with debugging via single-wire SWDIO (PD1) connected to an external WCH-LinkE. The submitter has tested it: built with WCH RISC-V GCC 8.2.0 (-march=rv32ec -mabi=ilp32e), the image is 15680 bytes (fitting into 16KB Flash), and after flashing, the serial output shows the RT-Thread banner and msh prompt. The proposal contains 5 commits and 47 files (+9258/-0), and is currently under review.

3.2 CANopen Ecosystem Dual Repos Launch MkDocs Documentation Sites (09-28)

Date: 2026-09-28 08:45 ~ 09:09 (push time)　Source: canopennode-rtt, lely-canopen-rtt

Community contributor wdfk-prog (the submitter of the canopennode package merged into v1.2.0 on 09-24 in the RT-Thread package index) published documentation sites for two CANopen integration repositories within the window: canopennode-rtt (CANopenNode integration, supporting logical device mode for multi-device nodes) and lely-canopen-rtt (Lely CANopen integration, single-owner EV/IO2 runtime with static object dictionary, optional master services) both pushed MkDocs manuals and Doxygen API documentation; the lely repo additionally added PR documentation validation CI. Both packages previously had introductory posts on the RT-Thread forum (the lely master usage long-form article was covered on 09-11). Investment in industrial communication package development continues.

3.3 AWTK Open Source License Switches to Apache 2.0 (09-26)

Date: 2026-09-26 08:50 (commit time)　Source: zlgopen/awtk license change commit

The general-purpose embedded GUI toolchain AWTK (zlgopen/awtk, 3.3k stars) switched its license entirely from LGPL-2.1 to Apache License 2.0 within the window (LICENSE file +201/-504), committed by project lead author lixianjing. AWTK and its RT-Thread packages (awtk, etc.) have long served GUI application development on RT-Thread, and the license relaxation facilitates commercial integration. This is an ecosystem reference item (not RT-Thread-specific).

IV. Industry Applications

4.1 Luckfox RV1103 Single-Chip Drone Prototype: RISC-V Core Runs RT-Thread Flight Controller (09-27)

Date: 2026-09-27 17:25 ~ 20:04 (creation and push time)　Source: luckfox-rv1103-drone

Developer nguyencanhanh has published a single-chip quadcopter drone prototype: centered on the Rockchip RV1103 (Luckfox Pico Mini B), with the Cortex-A7 running Linux handling the camera, NPU recognition, Wi-Fi, GPS, and remote control reception, while the on-chip RISC-V MCU core (HPMCU) runs RT-Thread executing a 1kHz flight control loop; the project’s goal is to answer with empirical data whether “a single-chip architecture can fly directly,” with an external independent flight controller as the fallback option. As of 09-27: no actual flight yet, but Linux and the MCU are already running in parallel, the 1kHz loop has been tested, and the flight control software can run fully in a simulator with 3D control views; the custom LFX_FC_R1 flight controller board (46×46mm) has completed routing. The project is open-sourced under MIT + CERN-OHL-P licenses, and is a community individual prototype.

V. Summary and Trend Observations

5.1 Trends Over the Past Three Days (09-25 ~ 09-28)

  • RISC-V threads run through board-level, CI, and application layers: The CI cleanup fix for GD32VW553H-EVAL (GD32V series RISC-V) was merged into mainline, the Qinheng CH32V003F4P6-EVT (RV32EC) BSP proposal entered review, and the community also has a prototype running RT-Thread on the RV1103’s on-chip RISC-V core for flight control—from build toolchain to board support to application prototype, RISC-V continues to appear.
  • Memory and ABI robustness fixes advance in concentration: Three issues appeared in the same window—STM32 linker script stack alignment (110 files, corresponding to the three-year-old issue #7527), devtmpfs path out-of-bounds, and FinSH path completion heap overflow; six of the seven hardening series submitted on 09-22 (#11820 ~ #11825) collectively moved to pending review on 09-26, making security-oriented cleanup the main body of the review queue.
  • AI coding agents enter the regular collaboration pipeline: The GD32V CI fix was submitted by a GitHub Copilot coding agent, taking about 3 minutes from issue to initial draft and merged into mainline the next day, showing that agents are beginning to handle the complete loop of small mainline fixes.
  • Official offline training resumes registration: The touring training was announced for 6 cities and 6 sessions (4 Saturdays from late October to mid-November), bringing offline event density back to a high for the year.

5.2 Limitations and Deduplication Notes

  • Deduplication notes: The ESP32-C6 board-level proposal (#11836, covered on 09-25, with no substantive changes during continued review in the window), the kernel vsnprintf fix (#11834, covered on 09-25, with only review updates in the window), the CH32V203 BSP merge (covered on 09-24), the Gino Pi series (covered 09-22 ~ 09-24), and the RSOC26 tutorial (covered on 09-23) are not reported again.
  • Touring training session information is subject to the official registration form; if media reprints differ from the official WeChat account, the official version prevails.
  • The official news API and the official website news list page status remain the same as previously (thirty-ninth day of no updates, page cannot be directly verified).

Appendix: Source Verification Table

Source Verification Result
RT-Thread official news API Latest entry 2026-06-17; no additions within the window; halted for the thirty-ninth consecutive day
Official website news list page Still front-end dynamically rendered, cannot be read directly (data same as official news API)
Community forum article API 1 new article within the window: “MCU Linker Script ‘Upgrade’” (09-28); the rest are from 09-23 and earlier
GitHub org: RT-Thread (main repo commits) 2 merges within the window: b40aeb146 (#11837, 09-26 19:58), 05badce95 (#11832, 09-27 12:18)
GitHub org: RT-Thread (PR / Issue) 5 new proposals within the window (#11837, #11838, #11840 ~ #11842), 2 merges (#11832, #11837), 1 closed without merge (#11840, closed by author); 1 new bug report (#11839); six of the seven hardening series items moved to pending review in a cluster on 09-26
GitHub RT-Thread/rt-thread (releases / tags) No new releases within the window; latest remains v5.3.0 from 09-10
GitHub RT-Thread/packages (package index) No new commits within the window; latest is 09-24 (previously covered)
GitHub RT-Thread-packages (device support package org) No new pushes within the window; esp-idf package PR #17 still under review (corresponds to mainline #11836)
GitHub RT-Thread-Studio (BSP SDK org) No new pushes within the window; latest Titan Mini commit is 09-24 (previously covered)
GitHub GD32-MCU-IOT (vendor downstream org) No new pushes within the window
GitHub topic:rt-thread (pushes in the past week) 6 repos pushed within the window: canopennode-rtt, lely-canopen-rtt (see 3.2), luckfox-rv1103-drone (see 4.1), high-dynamic-transport-recorder-showcase (new STM32H743 recorder library, not covered in the main text), h120d-protocol (README update), zlgopen/awtk (license change, see 3.3)
Google News aggregation (Chinese and English, via proxy) 1 valid new item within the window: tour training announcement (09-27, see 2.1); no valid hits for English queries
WeChat official account channel “RT-Thread操作系统” published the tour training announcement on 09-27; registration form for the 6-city sessions verified item by item

Complete Source List