fkie_cve-2024-56701
Vulnerability from fkie_nvd
Published
2024-12-28 10:15
Modified
2025-10-06 17:38
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
powerpc/pseries: Fix dtl_access_lock to be a rw_semaphore
The dtl_access_lock needs to be a rw_sempahore, a sleeping lock, because
the code calls kmalloc() while holding it, which can sleep:
# echo 1 > /proc/powerpc/vcpudispatch_stats
BUG: sleeping function called from invalid context at include/linux/sched/mm.h:337
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 199, name: sh
preempt_count: 1, expected: 0
3 locks held by sh/199:
#0: c00000000a0743f8 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x324/0x438
#1: c0000000028c7058 (dtl_enable_mutex){+.+.}-{3:3}, at: vcpudispatch_stats_write+0xd4/0x5f4
#2: c0000000028c70b8 (dtl_access_lock){+.+.}-{2:2}, at: vcpudispatch_stats_write+0x220/0x5f4
CPU: 0 PID: 199 Comm: sh Not tainted 6.10.0-rc4 #152
Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1202 0xf000005 of:SLOF,HEAD hv:linux,kvm pSeries
Call Trace:
dump_stack_lvl+0x130/0x148 (unreliable)
__might_resched+0x174/0x410
kmem_cache_alloc_noprof+0x340/0x3d0
alloc_dtl_buffers+0x124/0x1ac
vcpudispatch_stats_write+0x2a8/0x5f4
proc_reg_write+0xf4/0x150
vfs_write+0xfc/0x438
ksys_write+0x88/0x148
system_call_exception+0x1c4/0x5a0
system_call_common+0xf4/0x258
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries: Fix dtl_access_lock to be a rw_semaphore\n\nThe dtl_access_lock needs to be a rw_sempahore, a sleeping lock, because\nthe code calls kmalloc() while holding it, which can sleep:\n\n # echo 1 \u003e /proc/powerpc/vcpudispatch_stats\n BUG: sleeping function called from invalid context at include/linux/sched/mm.h:337\n in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 199, name: sh\n preempt_count: 1, expected: 0\n 3 locks held by sh/199:\n #0: c00000000a0743f8 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x324/0x438\n #1: c0000000028c7058 (dtl_enable_mutex){+.+.}-{3:3}, at: vcpudispatch_stats_write+0xd4/0x5f4\n #2: c0000000028c70b8 (dtl_access_lock){+.+.}-{2:2}, at: vcpudispatch_stats_write+0x220/0x5f4\n CPU: 0 PID: 199 Comm: sh Not tainted 6.10.0-rc4 #152\n Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1202 0xf000005 of:SLOF,HEAD hv:linux,kvm pSeries\n Call Trace:\n dump_stack_lvl+0x130/0x148 (unreliable)\n __might_resched+0x174/0x410\n kmem_cache_alloc_noprof+0x340/0x3d0\n alloc_dtl_buffers+0x124/0x1ac\n vcpudispatch_stats_write+0x2a8/0x5f4\n proc_reg_write+0xf4/0x150\n vfs_write+0xfc/0x438\n ksys_write+0x88/0x148\n system_call_exception+0x1c4/0x5a0\n system_call_common+0xf4/0x258"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/pseries: Se corrige que dtl_access_lock sea un rw_semaphore. El dtl_access_lock debe ser un rw_sempahore, un bloqueo inactivo, porque el c\u00f3digo llama a kmalloc() mientras lo mantiene, lo que puede inactivar: # echo 1 \u0026gt; /proc/powerpc/vcpudispatch_stats ERROR: funci\u00f3n inactiva llamada desde un contexto no v\u00e1lido en include/linux/sched/mm.h:337 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 199, name: sh preempt_count: 1, expected: 0 3 bloqueos mantenidos por sh/199: #0: c00000000a0743f8 (sb_writers#3){.+.+}-{0:0}, en: vfs_write+0x324/0x438 #1: c0000000028c7058 (dtl_enable_mutex){+.+.}-{3:3}, en: vcpudispatch_stats_write+0xd4/0x5f4 #2: c0000000028c70b8 (dtl_access_lock){+.+.}-{2:2}, en: vcpudispatch_stats_write+0x220/0x5f4 CPU: 0 PID: 199 Comm: sh No contaminado 6.10.0-rc4 #152 Nombre del hardware: IBM pSeries (emulado por qemu) POWER9 (sin procesar) 0x4e1202 0xf000005 de:SLOF,HEAD hv:linux,kvm Rastreo de llamadas de pSeries: dump_stack_lvl+0x130/0x148 (no confiable) __might_resched+0x174/0x410 kmem_cache_alloc_noprof+0x340/0x3d0 alloc_dtl_buffers+0x124/0x1ac vcpudispatch_stats_write+0x2a8/0x5f4 proc_reg_write+0xf4/0x150 vfs_write+0xfc/0x438 ksys_write+0x88/0x148 excepci\u00f3n_de_llamada_al_sistema+0x1c4/0x5a0 llamada_al_sistema_com\u00fan+0xf4/0x258"
}
],
"id": "CVE-2024-56701",
"lastModified": "2025-10-06T17:38:54.657",
"metrics": {
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{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2024-12-28T10:15:17.620",
"references": [
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],
"source": "nvd@nist.gov",
"type": "Primary"
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]
}
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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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