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CVE-2024-56780 (GCVE-0-2024-56780)

Vulnerability from cvelistv5 – Published: 2025-01-08 17:49 – Updated: 2026-05-23 15:56
VLAI
Title
quota: flush quota_release_work upon quota writeback
Summary
In the Linux kernel, the following vulnerability has been resolved: quota: flush quota_release_work upon quota writeback One of the paths quota writeback is called from is: freeze_super() sync_filesystem() ext4_sync_fs() dquot_writeback_dquots() Since we currently don't always flush the quota_release_work queue in this path, we can end up with the following race: 1. dquot are added to releasing_dquots list during regular operations. 2. FS Freeze starts, however, this does not flush the quota_release_work queue. 3. Freeze completes. 4. Kernel eventually tries to flush the workqueue while FS is frozen which hits a WARN_ON since transaction gets started during frozen state: ext4_journal_check_start+0x28/0x110 [ext4] (unreliable) __ext4_journal_start_sb+0x64/0x1c0 [ext4] ext4_release_dquot+0x90/0x1d0 [ext4] quota_release_workfn+0x43c/0x4d0 Which is the following line: WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE); Which ultimately results in generic/390 failing due to dmesg noise. This was detected on powerpc machine 15 cores. To avoid this, make sure to flush the workqueue during dquot_writeback_dquots() so we dont have any pending workitems after freeze.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:56 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d40c192e119892799dd4ddf94f5cea6fa93775ef , < a5abba5e0e586e258ded3e798fe5f69c66fec198 (git)
Affected: 86d89987f0998c98f57d641e308b40452a994045 , < 6f3821acd7c3143145999248087de5fb4b48cf26 (git)
Affected: 89602de9a2d7080b7a4029d5c1bf8f78d295ff5f , < ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb (git)
Affected: 3027e200dd58d5b437f16634dbbd355b29ffe0a6 , < 3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb (git)
Affected: dabc8b20756601b9e1cc85a81d47d3f98ed4d13a , < bcacb52a985f1b6d280f698a470b873dfe52728a (git)
Affected: dabc8b20756601b9e1cc85a81d47d3f98ed4d13a , < 8ea87e34792258825d290f4dc5216276e91cb224 (git)
Affected: dabc8b20756601b9e1cc85a81d47d3f98ed4d13a , < ac6f420291b3fee1113f21d612fa88b628afab5b (git)
Affected: f3e9a2bbdeb8987508dd6bb2b701dea911d4daec (git)
Affected: 903fc5d8cb48b0d2de7095ef40e39fd32bb27bd0 (git)
Affected: 31bed65eecbc5ce57592cfe31947eaa64e3d678e (git)
Affected: 5.4.257 , < 5.4.287 (semver)
Affected: 5.10.195 , < 5.10.231 (semver)
Affected: 5.15.132 , < 5.15.174 (semver)
Affected: 6.1.53 , < 6.1.120 (semver)
Affected: 4.19.295 , < 4.20 (semver)
Affected: 6.4.16 , < 6.5 (semver)
Affected: 6.5.3 , < 6.6 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 5.4.287 , ≤ 5.4.* (semver)
Unaffected: 5.10.231 , ≤ 5.10.* (semver)
Unaffected: 5.15.174 , ≤ 5.15.* (semver)
Unaffected: 6.1.120 , ≤ 6.1.* (semver)
Unaffected: 6.6.64 , ≤ 6.6.* (semver)
Unaffected: 6.12.4 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: quota: vaciar quota_release_work al reescribir la cuota Una de las rutas desde las que se llama a la reescritura de cuota es: freeze_super() sync_filesystem() ext4_sync_fs() dquot_writeback_dquots() Dado que actualmente no siempre vaciamos la cola quota_release_work en esta ruta, podemos terminar con la siguiente ejecuci\u00f3n: 1. dquot se agregan a la lista release_dquots durante las operaciones regulares. 2. FS Freeze comienza, sin embargo, esto no vac\u00eda la cola quota_release_work. 3. Freeze se completa. 4. El kernel finalmente intenta vaciar la cola de trabajo mientras FS est\u00e1 congelado, lo que genera un WARN_ON ya que la transacci\u00f3n se inicia durante el estado congelado: ext4_journal_check_start+0x28/0x110 [ext4] (no confiable) __ext4_journal_start_sb+0x64/0x1c0 [ext4] ext4_release_dquot+0x90/0x1d0 [ext4] quota_release_workfn+0x43c/0x4d0 Que es la siguiente l\u00ednea: WARN_ON(sb-\u0026gt;s_writers.frozen == SB_FREEZE_COMPLETE); Lo que finalmente da como resultado que generic/390 falle debido al ruido de dmesg. Esto se detect\u00f3 en una m\u00e1quina PowerPC de 15 n\u00facleos. Para evitar esto, aseg\u00farese de vaciar la cola de trabajo durante dquot_writeback_dquots() para que no tengamos ning\u00fan elemento de trabajo pendiente despu\u00e9s del congelamiento."
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            },
            {
              "url": "https://git.kernel.org/stable/c/3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb"
            },
            {
              "url": "https://git.kernel.org/stable/c/bcacb52a985f1b6d280f698a470b873dfe52728a"
            },
            {
              "url": "https://git.kernel.org/stable/c/8ea87e34792258825d290f4dc5216276e91cb224"
            },
            {
              "url": "https://git.kernel.org/stable/c/ac6f420291b3fee1113f21d612fa88b628afab5b"
            }
          ],
          "title": "quota: flush quota_release_work upon quota writeback",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-56780",
        "datePublished": "2025-01-08T17:49:17.889Z",
        "dateReserved": "2024-12-29T11:26:39.768Z",
        "dateUpdated": "2026-05-11T20:58:55.699Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.