cve-2024-36908
Vulnerability from cvelistv5
Published
2024-05-30 15:29
Modified
2024-08-02 03:43
Severity
Summary
blk-iocost: do not WARN if iocg was already offlined
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/01bc4fda9ea0a6b52f12326486f07a4910666cf6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14b3275f93d4a0d8ddc02195bc4e9869b7a3700e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c172ac7afe4442964f4153b2c78fe4e005d9d67
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
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                "timestamp": "2024-05-31T18:30:12.396680Z",
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          "value": "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 \u0027active_list\u0027 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 \u0027active_list\u0027 is irrelevant, and \u0027waitq_timer\u0027\nis canceled after removing \u0027active_list\u0027 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."
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    "datePublished": "2024-05-30T15:29:07.773Z",
    "dateReserved": "2024-05-30T15:25:07.067Z",
    "dateUpdated": "2024-08-02T03:43:49.881Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-36908\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-30T16:15:14.300\",\"lastModified\":\"2024-05-30T18:18:58.870\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"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 \u0027active_list\u0027 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 \u0027active_list\u0027 is irrelevant, and \u0027waitq_timer\u0027\\nis canceled after removing \u0027active_list\u0027 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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: blk-iocost: no ADVERTIR si iocg ya estaba desconectado. En iocg_pay_debt(), se activa una advertencia si \u0027active_list\u0027 est\u00e1 vac\u00eda, lo que pretende confirmar que iocg est\u00e1 activo cuando deuda. Sin embargo, se puede activar una advertencia durante un blkcg o la eliminaci\u00f3n de un disco, si se ejecuta iocg_waitq_timer_fn() en ese momento: ADVERTENCIA: CPU: 0 PID: 2344971 en block/blk-iocost.c:1402 iocg_pay_debt+0x14c/0x190 Seguimiento de llamadas: iocg_pay_debt +0x14c/0x190 iocg_kick_waitq+0x438/0x4c0 iocg_waitq_timer_fn+0xd8/0x130 __run_hrtimer+0x144/0x45c __hrtimer_run_queues+0x16c/0x244 hrtimer_interrupt+0x2cc/0x7b0 La advertencia en esta situaci\u00f3n es sin sentido. Dado que este iocg se est\u00e1 eliminando, el estado de \u0027active_list\u0027 es irrelevante y \u0027waitq_timer\u0027 se cancela despu\u00e9s de eliminar \u0027active_list\u0027 en ioc_pd_free(), lo que garantiza que iocg se libere despu\u00e9s de que iocg_waitq_timer_fn() regrese. Por lo tanto, agregue la verificaci\u00f3n si iocg ya estaba desconectado para evitar advertencias al eliminar un blkcg o un disco.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/01bc4fda9ea0a6b52f12326486f07a4910666cf6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/14b3275f93d4a0d8ddc02195bc4e9869b7a3700e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1c172ac7afe4442964f4153b2c78fe4e005d9d67\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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