{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: Move scsi_host_busy() out of host lock for waking up EH handler\n\nInside scsi_eh_wakeup(), scsi_host_busy() is called & checked with host\nlock every time for deciding if error handler kthread needs to be waken up.\n\nThis can be too heavy in case of recovery, such as:\n\n - N hardware queues\n\n - queue depth is M for each hardware queue\n\n - each scsi_host_busy() iterates over (N * M) tag/requests\n\nIf recovery is triggered in case that all 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't\nneed the host lock for getting busy count because host the lock never\ncovers that.\n\n[mkp: Drop unnecessary 'busy' variables pointed out by Bart]"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/scsi/scsi_error.c",
                  "drivers/scsi/scsi_lib.c",
                  "drivers/scsi/scsi_priv.h"
               ],
               "versions": [
                  {
                     "version": "6eb045e092ef",
                     "lessThan": "f5944853f7a9",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "6eb045e092ef",
                     "lessThan": "d37c1c81419f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "6eb045e092ef",
                     "lessThan": "db6338f45971",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "6eb045e092ef",
                     "lessThan": "65ead8468c21",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "6eb045e092ef",
                     "lessThan": "07e3ca0f17f5",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "6eb045e092ef",
                     "lessThan": "4373534a9850",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/scsi/scsi_error.c",
                  "drivers/scsi/scsi_lib.c",
                  "drivers/scsi/scsi_priv.h"
               ],
               "versions": [
                  {
                     "version": "5.5",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.5",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.210",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.149",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.77",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.16",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.4",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/f5944853f7a961fedc1227dc8f60393f8936d37c"
            },
            {
               "url": "https://git.kernel.org/stable/c/d37c1c81419fdef66ebd0747cf76fb8b7d979059"
            },
            {
               "url": "https://git.kernel.org/stable/c/db6338f45971b4285ea368432a84033690eaf53c"
            },
            {
               "url": "https://git.kernel.org/stable/c/65ead8468c21c2676d4d06f50b46beffdea69df1"
            },
            {
               "url": "https://git.kernel.org/stable/c/07e3ca0f17f579491b5f54e9ed05173d6c1d6fcb"
            },
            {
               "url": "https://git.kernel.org/stable/c/4373534a9850627a2695317944898eb1283a2db0"
            }
         ],
         "title": "scsi: core: Move scsi_host_busy() out of host lock for waking up EH handler",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-26627",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}