fkie_cve-2024-57946
Vulnerability from fkie_nvd
Published
2025-01-21 13:15
Modified
2025-02-28 19:03
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio-blk: don't keep queue frozen during system suspend Commit 4ce6e2db00de ("virtio-blk: Ensure no requests in virtqueues before deleting vqs.") replaces queue quiesce with queue freeze in virtio-blk's PM callbacks. And the motivation is to drain inflight IOs before suspending. block layer's queue freeze looks very handy, but it is also easy to cause deadlock, such as, any attempt to call into bio_queue_enter() may run into deadlock if the queue is frozen in current context. There are all kinds of ->suspend() called in suspend context, so keeping queue frozen in the whole suspend context isn't one good idea. And Marek reported lockdep warning[1] caused by virtio-blk's freeze queue in virtblk_freeze(). [1] https://lore.kernel.org/linux-block/ca16370e-d646-4eee-b9cc-87277c89c43c@samsung.com/ Given the motivation is to drain in-flight IOs, it can be done by calling freeze & unfreeze, meantime restore to previous behavior by keeping queue quiesced during suspend.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/12c0ddd6c551c1e438b087f874b4f1223a75f7eaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6dea8e3de59928974bf157dd0499d3958d744ae4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7678abee0867e6b7fb89aa40f6e9f575f755fb37Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92d5139b91147ab372a17daf5dc27a5b9278e516Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ca428c6397abaa8c38f5c69133a2299e1efbbf2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e323f856cf4963120e0e3892a84ef8bd764a0e4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d738f3215bb4f88911ff4579780a44960c8e0ca5Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.13
linux linux_kernel 6.13
linux linux_kernel 6.13
linux linux_kernel 6.13
linux linux_kernel 6.13
linux linux_kernel 6.13


To clipboard 

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  "cveTags": [],
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-blk: don\u0027t keep queue frozen during system suspend\n\nCommit 4ce6e2db00de (\"virtio-blk: Ensure no requests in virtqueues before\ndeleting vqs.\") replaces queue quiesce with queue freeze in virtio-blk\u0027s\nPM callbacks. And the motivation is to drain inflight IOs before suspending.\n\nblock layer\u0027s queue freeze looks very handy, but it is also easy to cause\ndeadlock, such as, any attempt to call into bio_queue_enter() may run into\ndeadlock if the queue is frozen in current context. There are all kinds\nof -\u003esuspend() called in suspend context, so keeping queue frozen in the\nwhole suspend context isn\u0027t one good idea. And Marek reported lockdep\nwarning[1] caused by virtio-blk\u0027s freeze queue in virtblk_freeze().\n\n[1] https://lore.kernel.org/linux-block/ca16370e-d646-4eee-b9cc-87277c89c43c@samsung.com/\n\nGiven the motivation is to drain in-flight IOs, it can be done by calling\nfreeze \u0026 unfreeze, meantime restore to previous behavior by keeping queue\nquiesced during suspend."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: virtio-blk: no mantener la cola congelada durante la suspensi\u00f3n del sistema. Commit 4ce6e2db00de (\"virtio-blk: Aseg\u00farese de que no haya solicitudes en virtqueues antes de eliminar vqs\") reemplaza la inactividad de la cola con el congelamiento de la cola en las devoluciones de llamadas de PM de virtio-blk. Y la motivaci\u00f3n es drenar las E/S en vuelo antes de suspender. El congelamiento de la cola de la capa de bloque parece muy \u00fatil, pero tambi\u00e9n es f\u00e1cil causar un bloqueo, como, por ejemplo, cualquier intento de llamar a bio_queue_enter() puede encontrarse con un bloqueo si la cola est\u00e1 congelada en el contexto actual. Hay todo tipo de -\u0026gt;suspend() llamados en el contexto de suspensi\u00f3n, por lo que mantener la cola congelada en todo el contexto de suspensi\u00f3n no es una buena idea. Y Marek inform\u00f3 una advertencia de lockdep[1] causada por la cola congelada de virtio-blk en virtblk_freeze(). [1] https://lore.kernel.org/linux-block/ca16370e-d646-4eee-b9cc-87277c89c43c@samsung.com/ Dado que la motivaci\u00f3n es drenar las E/S en vuelo, se puede hacer llamando a congelar y descongelar, mientras tanto restaurar el comportamiento anterior manteniendo la cola inactiva durante la suspensi\u00f3n."
    }
  ],
  "id": "CVE-2024-57946",
  "lastModified": "2025-02-28T19:03:34.977",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-01-21T13:15:09.137",
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  "vulnStatus": "Analyzed",
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          "lang": "en",
          "value": "CWE-667"
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      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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