fkie_cve-2025-38515
Vulnerability from fkie_nvd
Published
2025-08-16 11:15
Modified
2025-08-18 20:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/sched: Increment job count before swapping tail spsc queue A small race exists between spsc_queue_push and the run-job worker, in which spsc_queue_push may return not-first while the run-job worker has already idled due to the job count being zero. If this race occurs, job scheduling stops, leading to hangs while waiting on the job’s DMA fences. Seal this race by incrementing the job count before appending to the SPSC queue. This race was observed on a drm-tip 6.16-rc1 build with the Xe driver in an SVM test case.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/549a9c78c3ea6807d0dc4162a4f5ba59f217d5a0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8af39ec5cf2be522c8eb43a3d8005ed59e4daaee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c64f5310530baf75328292f9b9f3f2961d185183
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2d6547dc8b9b332f9bc00875197287a6a4db65a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e62f51d0ec8a9baf324caf9a564f8e318d36a551
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef58a95457466849fa7b31fd3953801a5af0f58b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef841f8e4e1ff67817ca899bedc5ebb00847c0a7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f9a4f28a4fc4ee453a92a9abbe36e26224d17749
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sched: Increment job count before swapping tail spsc queue\n\nA small race exists between spsc_queue_push and the run-job worker, in\nwhich spsc_queue_push may return not-first while the run-job worker has\nalready idled due to the job count being zero. If this race occurs, job\nscheduling stops, leading to hangs while waiting on the job\u2019s DMA\nfences.\n\nSeal this race by incrementing the job count before appending to the\nSPSC queue.\n\nThis race was observed on a drm-tip 6.16-rc1 build with the Xe driver in\nan SVM test case."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/sched: Incremento del recuento de trabajos antes de intercambiar la cola de cola de spsc. Existe una peque\u00f1a competencia entre spsc_queue_push y el trabajador de ejecuci\u00f3n de trabajos, en la que spsc_queue_push puede devolver un resultado no-first mientras el trabajador de ejecuci\u00f3n de trabajos ya est\u00e1 inactivo debido a que el recuento de trabajos es cero. Si se produce esta competencia, se detiene la programaci\u00f3n de trabajos, lo que provoca bloqueos mientras se espera en las barreras DMA del trabajo. Para solucionar esta competencia, incremente el recuento de trabajos antes de agregarlos a la cola de SPSC. Esta competencia se observ\u00f3 en una compilaci\u00f3n drm-tip 6.16-rc1 con el controlador Xe en un caso de prueba SVM."
    }
  ],
  "id": "CVE-2025-38515",
  "lastModified": "2025-08-18T20:16:28.750",
  "metrics": {},
  "published": "2025-08-16T11:15:44.637",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/549a9c78c3ea6807d0dc4162a4f5ba59f217d5a0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8af39ec5cf2be522c8eb43a3d8005ed59e4daaee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c64f5310530baf75328292f9b9f3f2961d185183"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e2d6547dc8b9b332f9bc00875197287a6a4db65a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e62f51d0ec8a9baf324caf9a564f8e318d36a551"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ef58a95457466849fa7b31fd3953801a5af0f58b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ef841f8e4e1ff67817ca899bedc5ebb00847c0a7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f9a4f28a4fc4ee453a92a9abbe36e26224d17749"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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