{"id":"CVE-2024-36908","summary":"blk-iocost: do not WARN if iocg was already offlined","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-iocost: do not WARN if iocg was already offlined\n\nIn iocg_pay_debt(), warn is triggered if 'active_list' is empty, which\nis intended to confirm iocg is active when it has debt. However, warn\ncan be triggered during a blkcg or disk removal, if iocg_waitq_timer_fn()\nis run at that time:\n\n  WARNING: CPU: 0 PID: 2344971 at block/blk-iocost.c:1402 iocg_pay_debt+0x14c/0x190\n  Call trace:\n  iocg_pay_debt+0x14c/0x190\n  iocg_kick_waitq+0x438/0x4c0\n  iocg_waitq_timer_fn+0xd8/0x130\n  __run_hrtimer+0x144/0x45c\n  __hrtimer_run_queues+0x16c/0x244\n  hrtimer_interrupt+0x2cc/0x7b0\n\nThe warn in this situation is meaningless. Since this iocg is being\nremoved, the state of the 'active_list' is irrelevant, and 'waitq_timer'\nis canceled after removing 'active_list' in ioc_pd_free(), which ensures\niocg is freed after iocg_waitq_timer_fn() returns.\n\nTherefore, add the check if iocg was already offlined to avoid warn\nwhen removing a blkcg or disk.","modified":"2026-03-20T12:36:51.435370Z","published":"2024-05-30T15:29:07.773Z","related":["MGASA-2024-0263","MGASA-2024-0266","SUSE-SU-2025:0117-1","SUSE-SU-2025:0153-1","SUSE-SU-2025:0154-1","SUSE-SU-2025:0289-1","SUSE-SU-2025:20165-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20248-1","SUSE-SU-2025:20249-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36908.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/01bc4fda9ea0a6b52f12326486f07a4910666cf6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/14b3275f93d4a0d8ddc02195bc4e9869b7a3700e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1c172ac7afe4442964f4153b2c78fe4e005d9d67"},{"type":"WEB","url":"https://git.kernel.org/stable/c/56a9d07f427378eeb75b917bb49c6fbea8204126"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7d215e013d097ed6fc4b0ad0272c9514214dc408"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aed0aac18f039dd4af13c143063754efca358cb0"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36908.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-36908"},{"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":"7caa47151ab2e644dd221f741ec7578d9532c9a3"},{"fixed":"56a9d07f427378eeb75b917bb49c6fbea8204126"},{"fixed":"7d215e013d097ed6fc4b0ad0272c9514214dc408"},{"fixed":"aed0aac18f039dd4af13c143063754efca358cb0"},{"fixed":"1c172ac7afe4442964f4153b2c78fe4e005d9d67"},{"fixed":"14b3275f93d4a0d8ddc02195bc4e9869b7a3700e"},{"fixed":"01bc4fda9ea0a6b52f12326486f07a4910666cf6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-36908.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}