[Midnightbsd-cvs] [MidnightBSD/src] 6dc873: sound: fix mmap buffer lifetime

[Lucas Holt]

  Branch: refs/heads/stable/4.0
  Home:   https://github.com/MidnightBSD/src
  Commit: 6dc873c992b045f034fae47108db485c05a7f038
      https://github.com/MidnightBSD/src/commit/6dc873c992b045f034fae47108db485c05a7f038
  Author: Lucas Holt <luke at foolishgames.com>
  Date:   2026-06-10 (Wed, 10 Jun 2026)

  Changed paths:
    M sys/dev/sound/pcm/buffer.c
    M sys/dev/sound/pcm/buffer.h
    M sys/dev/sound/pcm/dsp.c
    M tests/sys/Makefile
    A tests/sys/sound/Makefile
    A tests/sys/sound/mmap.c

  Log Message:
  -----------
  sound: fix mmap buffer lifetime

Port the FreeBSD sound(4) mmap security fix for CVE-2026-45258 and CVE-2026-49417. Reject overflowing mmap offsets and hold references on the DSP cdev and sound buffer for the lifetime of the mapping.

AI-Assisted-by: OpenAI Codex (GPT-5)
Signed-off-by: Lucas Holt <luke at foolishgames.com>


  Commit: 99282ce8150969761f9dfc88c70956f1d36366e9
      https://github.com/MidnightBSD/src/commit/99282ce8150969761f9dfc88c70956f1d36366e9
  Author: Lucas Holt <luke at foolishgames.com>
  Date:   2026-06-10 (Wed, 10 Jun 2026)

  Changed paths:
    M UPDATING

  Log Message:
  -----------
  UPDATING: note sound mmap security fix

Record the sound(4) mmap fixes for CVE-2026-45258 and CVE-2026-49417.

AI-Assisted-by: OpenAI Codex (GPT-5)
Signed-off-by: Lucas Holt <luke at foolishgames.com>


Compare: https://github.com/MidnightBSD/src/compare/ff627787576a...99282ce81509

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