{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-89753",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-89753"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()\n\nI am seeing some rcu_tasks stalls in the Meta fleet during reclaim.\n\n  INFO: rcu_tasks detected stalls on tasks:\n\t0000000088620d09: .. nvcsw: 6735/6735 holdout: 1 idle_cpu: -1/8\n\ttask:GlobalCPUThread state:R  running task  pid:2552016 tgid:2524552\n  Call Trace:\n   shrink_lruvec\n   mem_cgroup_iter\n   shrink_node\n   do_try_to_free_pages\n   try_to_free_pages\n   __alloc_frozen_pages_noprof\n   alloc_pages_noprof\n   pte_alloc_one\n   __pte_alloc\n   handle_mm_fault\n\nNothing promises direct reclaim returns in bounded time, and the scan loop\nin shrink_lruvec() only calls cond_resched(), which is a no-op on\nPREEMPTION kernels.  Involuntary preemption is not a Tasks-RCU quiescent\nstate, so the reclaiming task never reports one and becomes a holdout.\n\nUpgrade it to cond_resched_tasks_rcu_qs(), which reports a quiescent state\neven when cond_resched() does nothing.\n\nPS: This has been discussed in [1]",
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    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z"
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}