{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: mtk-cmdq: Move devm_mbox_controller_register() after devm_pm_runtime_enable()\n\nWhen mtk-cmdq unbinds, a WARN_ON message with condition\npm_runtime_get_sync() < 0 occurs.\n\nAccording to the call tracei below:\n  cmdq_mbox_shutdown\n  mbox_free_channel\n  mbox_controller_unregister\n  __devm_mbox_controller_unregister\n  ...\n\nThe root cause can be deduced to be calling pm_runtime_get_sync() after\ncalling pm_runtime_disable() as observed below:\n1. CMDQ driver uses devm_mbox_controller_register() in cmdq_probe()\n   to bind the cmdq device to the mbox_controller, so\n   devm_mbox_controller_unregister() will automatically unregister\n   the device bound to the mailbox controller when the device-managed\n   resource is removed. That means devm_mbox_controller_unregister()\n   and cmdq_mbox_shoutdown() will be called after cmdq_remove().\n2. CMDQ driver also uses devm_pm_runtime_enable() in cmdq_probe() after\n   devm_mbox_controller_register(), so that devm_pm_runtime_disable()\n   will be called after cmdq_remove(), but before\n   devm_mbox_controller_unregister().\n\nTo fix this problem, cmdq_probe() needs to move\ndevm_mbox_controller_register() after devm_pm_runtime_enable() to make\ndevm_pm_runtime_disable() be called after\ndevm_mbox_controller_unregister()."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/mailbox/mtk-cmdq-mailbox.c"
               ],
               "versions": [
                  {
                     "version": "623a6143a845",
                     "lessThan": "11fa625b45fa",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "623a6143a845",
                     "lessThan": "a8bd68e4329f",
                     "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/mailbox/mtk-cmdq-mailbox.c"
               ],
               "versions": [
                  {
                     "version": "4.19",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.19",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10.3",
                     "lessThanOrEqual": "6.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.11",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/11fa625b45faf0649118b9deaf2d31c86ac41911"
            },
            {
               "url": "https://git.kernel.org/stable/c/a8bd68e4329f9a0ad1b878733e0f80be6a971649"
            }
         ],
         "title": "mailbox: mtk-cmdq: Move devm_mbox_controller_register() after devm_pm_runtime_enable()",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-42319",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}