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wire 2026-05-12
stories 58
RSS Archive Reviews

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$ the-wire · showcase

KERNEL TASK SCHEDULER FIX LANDS AS KUNIT DEBUGFS DECOUPLED

By RepoJournal · Filed · About Linux · Composed from the cited sources · methodology

A critical fix preventing preemption of dying tasks during kernel oops just merged, eliminating a narrow window where scheduler assumptions break and bad things happen.

The core fix [1] addresses a dangerous race in make_task_dead() where an oopsing task could be preempted between becoming TASK_DEAD and entering the scheduler explicitly—violating __schedule()'s hard requirement for disabled preemption. Without this, finish_task_switch() operates on invalid assumptions about task state, risking memory corruption or worse. Merging alongside this is a kunit infrastructure cleanup [2] that decouples KUNIT_DEBUGFS from KUNIT_ALL_TESTS and fixes its dependency chain to properly require DEBUG_FS, preventing silent config failures where the debugfs interface builds but can't actually function. On the omarchy side, Bluetooth persistence now survives reboots [3] by disabling BlueZ's aggressive AutoEnable behavior—a quality-of-life fix with migration support for existing installs.

Action items

References

  1. [1] exit: prevent preemption of oopsing TASK_DEAD task torvalds/linux ↗
  2. [2] Merge tag 'linux_kselftest-kunit-fixes-7.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest torvalds/linux ↗
  3. [3] Persist Bluetooth power state across reboots (#5683) basecamp/omarchy ↗

$ ls linux/reviews/ # the step-back reads

the week in review Omarchy polkit PAM stack skipped system-auth the month in review Linux 7.3 rc cycle fixes cgroup kill, SMB corruption
Full archive → Weekly reviews →

Quick answers

What shipped in Linux on May 12, 2026?
A critical fix preventing preemption of dying tasks during kernel oops just merged, eliminating a narrow window where scheduler assumptions break and bad things happen. In total, 52 commits and 6 pull requests landed.
What were the notable Linux updates?
exit: prevent preemption of oopsing TASK_DEAD task, Merge tag 'linux_kselftest-kunit-fixes-7.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest, and Persist Bluetooth power state across reboots (#5683).
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$ log Linux --recent

drm-fixes backs out dma-buf debug, vfs closes pathwalk use-after-frees 29 shipped Netlink stops hashing the net pointer, stmmac clears a stuck RGMII interrupt 27 shipped Poly1305 carry fix lands, Omarchy locks down N1x laptops and idle fingerprint readers 23 shipped Omarchy copies agent logins over SSH, kernel queues 7.4 merges 106 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training verl rejects conflicting vLLM engine_kwargs, open-instruct adds MILES OPD behind a Megatron learner Interpretability nnsight 0.8.0 cuts import time from 7.6s to 1.6s

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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