fkie_cve-2024-36888
Vulnerability from fkie_nvd
Published
2024-05-30 16:15
Modified
2025-04-01 18:34
Severity ?
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
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 6.9 | |
| linux | linux_kernel | 6.9 | |
| linux | linux_kernel | 6.9 | |
| linux | linux_kernel | 6.9 | |
| linux | linux_kernel | 6.9 | |
| linux | linux_kernel | 6.9 |
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"descriptions": [
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"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."
}
],
"id": "CVE-2024-36888",
"lastModified": "2025-04-01T18:34:43.207",
"metrics": {
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"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.2,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.5,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
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"published": "2024-05-30T16:15:12.323",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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