CVE-2024-26627 (GCVE-0-2024-26627)

Vulnerability from cvelistv5 – Published: 2024-03-06 06:45 – Updated: 2025-05-04 08:52
VLAI?
Title
scsi: core: Move scsi_host_busy() out of host lock for waking up EH handler
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Move scsi_host_busy() out of host lock for waking up EH handler Inside scsi_eh_wakeup(), scsi_host_busy() is called & checked with host lock every time for deciding if error handler kthread needs to be waken up. This can be too heavy in case of recovery, such as: - N hardware queues - queue depth is M for each hardware queue - each scsi_host_busy() iterates over (N * M) tag/requests If recovery is triggered in case that all requests are in-flight, each scsi_eh_wakeup() is strictly serialized, when scsi_eh_wakeup() is called for the last in-flight request, scsi_host_busy() has been run for (N * M - 1) times, and request has been iterated for (N*M - 1) * (N * M) times. If both N and M are big enough, hard lockup can be triggered on acquiring host lock, and it is observed on mpi3mr(128 hw queues, queue depth 8169). Fix the issue by calling scsi_host_busy() outside the host lock. We don't need the host lock for getting busy count because host the lock never covers that. [mkp: Drop unnecessary 'busy' variables pointed out by Bart]
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6eb045e092efefafc6687409a6fa6d1dabf0fb69 , < f5944853f7a961fedc1227dc8f60393f8936d37c (git)
Affected: 6eb045e092efefafc6687409a6fa6d1dabf0fb69 , < d37c1c81419fdef66ebd0747cf76fb8b7d979059 (git)
Affected: 6eb045e092efefafc6687409a6fa6d1dabf0fb69 , < db6338f45971b4285ea368432a84033690eaf53c (git)
Affected: 6eb045e092efefafc6687409a6fa6d1dabf0fb69 , < 65ead8468c21c2676d4d06f50b46beffdea69df1 (git)
Affected: 6eb045e092efefafc6687409a6fa6d1dabf0fb69 , < 07e3ca0f17f579491b5f54e9ed05173d6c1d6fcb (git)
Affected: 6eb045e092efefafc6687409a6fa6d1dabf0fb69 , < 4373534a9850627a2695317944898eb1283a2db0 (git)
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    Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.77 , ≤ 6.1.* (semver)
Unaffected: 6.6.16 , ≤ 6.6.* (semver)
Unaffected: 6.7.4 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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requests are in-flight, each\\nscsi_eh_wakeup() is strictly serialized, when scsi_eh_wakeup() is called\\nfor the last in-flight request, scsi_host_busy() has been run for (N * M -\\n1) times, and request has been iterated for (N*M - 1) * (N * M) times.\\n\\nIf both N and M are big enough, hard lockup can be triggered on acquiring\\nhost lock, and it is observed on mpi3mr(128 hw queues, queue depth 8169).\\n\\nFix the issue by calling scsi_host_busy() outside the host lock. We don\u0027t\\nneed the host lock for getting busy count because host the lock never\\ncovers that.\\n\\n[mkp: Drop unnecessary \u0027busy\u0027 variables pointed out by Bart]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.77\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.16\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.4\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"5.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:52:36.937Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26627\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T08:52:36.937Z\", \"dateReserved\": \"2024-02-19T14:20:24.135Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-06T06:45:34.339Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.