{"id":"CVE-2024-42319","summary":"mailbox: mtk-cmdq: Move devm_mbox_controller_register() after devm_pm_runtime_enable()","details":"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() \u003c 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().","modified":"2026-04-02T12:17:56.760098Z","published":"2024-08-17T09:09:31.867Z","related":["SUSE-SU-2024:3190-1","SUSE-SU-2024:3194-1","SUSE-SU-2024:3195-1","SUSE-SU-2024:3209-1","SUSE-SU-2024:3383-1","SUSE-SU-2024:3483-1","SUSE-SU-2025:20044-1","SUSE-SU-2025:20047-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42319.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/11fa625b45faf0649118b9deaf2d31c86ac41911"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1403991a40b94438a2acc749bf05c117abdb34f9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a8bd68e4329f9a0ad1b878733e0f80be6a971649"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d00df6700ad10974a7e20646956f4ff22cdbe0ec"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42319.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-42319"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"623a6143a845bd485b00ba684f0ccef11835edab"},{"fixed":"1403991a40b94438a2acc749bf05c117abdb34f9"},{"fixed":"d00df6700ad10974a7e20646956f4ff22cdbe0ec"},{"fixed":"11fa625b45faf0649118b9deaf2d31c86ac41911"},{"fixed":"a8bd68e4329f9a0ad1b878733e0f80be6a971649"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42319.json"}}],"schema_version":"1.7.5"}