cve-2024-36888
Vulnerability from cvelistv5
Published
2024-05-30 15:28
Modified
2024-12-19 09:01
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: workqueue: Fix selection of wake_cpu in kick_pool() With cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following kernel oops was observed: smp: Bringing up secondary CPUs ... smp: Brought up 1 node, 8 CPUs Unable to handle kernel pointer dereference in virtual kernel address space Failing address: 0000000000000000 TEID: 0000000000000803 [..] Call Trace: arch_vcpu_is_preempted+0x12/0x80 select_idle_sibling+0x42/0x560 select_task_rq_fair+0x29a/0x3b0 try_to_wake_up+0x38e/0x6e0 kick_pool+0xa4/0x198 __queue_work.part.0+0x2bc/0x3a8 call_timer_fn+0x36/0x160 __run_timers+0x1e2/0x328 __run_timer_base+0x5a/0x88 run_timer_softirq+0x40/0x78 __do_softirq+0x118/0x388 irq_exit_rcu+0xc0/0xd8 do_ext_irq+0xae/0x168 ext_int_handler+0xbe/0xf0 psw_idle_exit+0x0/0xc default_idle_call+0x3c/0x110 do_idle+0xd4/0x158 cpu_startup_entry+0x40/0x48 rest_init+0xc6/0xc8 start_kernel+0x3c4/0x5e0 startup_continue+0x3c/0x50 The crash is caused by calling arch_vcpu_is_preempted() for an offline CPU. To avoid this, select the cpu with cpumask_any_and_distribute() to mask __pod_cpumask with cpu_online_mask. In case no cpu is left in the pool, skip the assignment. tj: This doesn't fully fix the bug as CPUs can still go down between picking the target CPU and the wake call. Fixing that likely requires adding cpu_online() test to either the sched or s390 arch code. However, regardless of how that is fixed, workqueue shouldn't be picking a CPU which isn't online as that would result in unpredictable and worse behavior.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777b
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767
Impacted products
Vendor Product Version
Linux Linux Version: 6.6
Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nworkqueue: Fix selection of wake_cpu in kick_pool()\n\nWith cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following\nkernel oops was observed:\n\nsmp: Bringing up secondary CPUs ...\nsmp: Brought up 1 node, 8 CPUs\nUnable to handle kernel pointer dereference in virtual kernel address space\nFailing address: 0000000000000000 TEID: 0000000000000803\n[..]\n Call Trace:\narch_vcpu_is_preempted+0x12/0x80\nselect_idle_sibling+0x42/0x560\nselect_task_rq_fair+0x29a/0x3b0\ntry_to_wake_up+0x38e/0x6e0\nkick_pool+0xa4/0x198\n__queue_work.part.0+0x2bc/0x3a8\ncall_timer_fn+0x36/0x160\n__run_timers+0x1e2/0x328\n__run_timer_base+0x5a/0x88\nrun_timer_softirq+0x40/0x78\n__do_softirq+0x118/0x388\nirq_exit_rcu+0xc0/0xd8\ndo_ext_irq+0xae/0x168\next_int_handler+0xbe/0xf0\npsw_idle_exit+0x0/0xc\ndefault_idle_call+0x3c/0x110\ndo_idle+0xd4/0x158\ncpu_startup_entry+0x40/0x48\nrest_init+0xc6/0xc8\nstart_kernel+0x3c4/0x5e0\nstartup_continue+0x3c/0x50\n\nThe crash is caused by calling arch_vcpu_is_preempted() for an offline\nCPU. To avoid this, select the cpu with cpumask_any_and_distribute()\nto mask __pod_cpumask with cpu_online_mask. In case no cpu is left in\nthe pool, skip the assignment.\n\ntj: This doesn\u0027t fully fix the bug as CPUs can still go down between picking\nthe target CPU and the wake call. Fixing that likely requires adding\ncpu_online() test to either the sched or s390 arch code. However, regardless\nof how that is fixed, workqueue shouldn\u0027t be picking a CPU which isn\u0027t\nonline as that would result in unpredictable and worse behavior."
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-36888\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-30T16:15:12.323\",\"lastModified\":\"2024-11-21T09:22:44.343\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nworkqueue: Fix selection of wake_cpu in kick_pool()\\n\\nWith cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following\\nkernel oops was observed:\\n\\nsmp: Bringing up secondary CPUs ...\\nsmp: Brought up 1 node, 8 CPUs\\nUnable to handle kernel pointer dereference in virtual kernel address space\\nFailing address: 0000000000000000 TEID: 0000000000000803\\n[..]\\n Call Trace:\\narch_vcpu_is_preempted+0x12/0x80\\nselect_idle_sibling+0x42/0x560\\nselect_task_rq_fair+0x29a/0x3b0\\ntry_to_wake_up+0x38e/0x6e0\\nkick_pool+0xa4/0x198\\n__queue_work.part.0+0x2bc/0x3a8\\ncall_timer_fn+0x36/0x160\\n__run_timers+0x1e2/0x328\\n__run_timer_base+0x5a/0x88\\nrun_timer_softirq+0x40/0x78\\n__do_softirq+0x118/0x388\\nirq_exit_rcu+0xc0/0xd8\\ndo_ext_irq+0xae/0x168\\next_int_handler+0xbe/0xf0\\npsw_idle_exit+0x0/0xc\\ndefault_idle_call+0x3c/0x110\\ndo_idle+0xd4/0x158\\ncpu_startup_entry+0x40/0x48\\nrest_init+0xc6/0xc8\\nstart_kernel+0x3c4/0x5e0\\nstartup_continue+0x3c/0x50\\n\\nThe crash is caused by calling arch_vcpu_is_preempted() for an offline\\nCPU. To avoid this, select the cpu with cpumask_any_and_distribute()\\nto mask __pod_cpumask with cpu_online_mask. In case no cpu is left in\\nthe pool, skip the assignment.\\n\\ntj: This doesn\u0027t fully fix the bug as CPUs can still go down between picking\\nthe target CPU and the wake call. Fixing that likely requires adding\\ncpu_online() test to either the sched or s390 arch code. However, regardless\\nof how that is fixed, workqueue shouldn\u0027t be picking a CPU which isn\u0027t\\nonline as that would result in unpredictable and worse behavior.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: workqueue: Se corrigi\u00f3 la selecci\u00f3n de wake_cpu en kick_pool() Con cpu_possible_mask=0-63 y cpu_online_mask=0-7 se observaron los siguientes errores del kernel: smp: Apareciendo CPU secundarias... smp: abri\u00f3 1 nodo, 8 CPU No se puede manejar la desreferencia del puntero del kernel en el espacio de direcciones virtual del kernel Direcci\u00f3n fallida: 0000000000000000 TEID: 0000000000000803 [..] Seguimiento de llamadas: arch_vcpu_is_preempted+0x12/0x80 select_idle_sibling+0x42/0x560 _rq_fair+0x29a/0x3b0 intenta_despertar_up +0x38e/0x6e0 kick_pool+0xa4/0x198 __queue_work.part.0+0x2bc/0x3a8 call_timer_fn+0x36/0x160 __run_timers+0x1e2/0x328 __run_timer_base+0x5a/0x88 run_timer_softirq+0x40/0x78 irq+0x118/0x388 irq_exit_rcu+0xc0/0xd8 hacer_ext_irq+ 0xae/0x168 ext_int_handler+0xbe/0xf0 psw_idle_exit+0x0/0xc default_idle_call+0x3c/0x110 do_idle+0xd4/0x158 cpu_startup_entry+0x40/0x48 rest_init+0xc6/0xc8 startup_continue+0x3c/0x50 El bloqueo se produce al llamar a arch_vcpu_is_preempted () para una CPU fuera de l\u00ednea. Para evitar esto, seleccione la CPU con cpumask_any_and_distribute() para enmascarar __pod_cpumask con cpu_online_mask. En caso de que no quede ninguna CPU en el grupo, omita la tarea. tj: Esto no soluciona completamente el error ya que las CPU a\u00fan pueden fallar entre la selecci\u00f3n de la CPU de destino y la llamada de activaci\u00f3n. Para solucionarlo, es probable que sea necesario agregar la prueba cpu_online() al c\u00f3digo arch sched o s390. Sin embargo, independientemente de c\u00f3mo se solucione, workqueue no deber\u00eda elegir una CPU que no est\u00e9 en l\u00ednea, ya que eso resultar\u00eda en un comportamiento peor e impredecible.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.2,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
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}


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