fkie_cve-2024-26806
Vulnerability from fkie_nvd
Published
2024-04-04 09:15
Modified
2025-03-27 21:30
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
spi: cadence-qspi: remove system-wide suspend helper calls from runtime PM hooks
The ->runtime_suspend() and ->runtime_resume() callbacks are not
expected to call spi_controller_suspend() and spi_controller_resume().
Remove calls to those in the cadence-qspi driver.
Those helpers have two roles currently:
- They stop/start the queue, including dealing with the kworker.
- They toggle the SPI controller SPI_CONTROLLER_SUSPENDED flag. It
requires acquiring ctlr->bus_lock_mutex.
Step one is irrelevant because cadence-qspi is not queued. Step two
however has two implications:
- A deadlock occurs, because ->runtime_resume() is called in a context
where the lock is already taken (in the ->exec_op() callback, where
the usage count is incremented).
- It would disallow all operations once the device is auto-suspended.
Here is a brief call tree highlighting the mutex deadlock:
spi_mem_exec_op()
...
spi_mem_access_start()
mutex_lock(&ctlr->bus_lock_mutex)
cqspi_exec_mem_op()
pm_runtime_resume_and_get()
cqspi_resume()
spi_controller_resume()
mutex_lock(&ctlr->bus_lock_mutex)
...
spi_mem_access_end()
mutex_unlock(&ctlr->bus_lock_mutex)
...
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | 6.8 | |
| linux | linux_kernel | 6.8 | |
| linux | linux_kernel | 6.8 | |
| linux | linux_kernel | 6.8 | |
| linux | linux_kernel | 6.8 | |
| linux | linux_kernel | 6.8 |
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"versionEndExcluding": "6.7.9",
"versionStartIncluding": "6.7",
"vulnerable": true
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: cadence-qspi: remove system-wide suspend helper calls from runtime PM hooks\n\nThe -\u003eruntime_suspend() and -\u003eruntime_resume() callbacks are not\nexpected to call spi_controller_suspend() and spi_controller_resume().\nRemove calls to those in the cadence-qspi driver.\n\nThose helpers have two roles currently:\n - They stop/start the queue, including dealing with the kworker.\n - They toggle the SPI controller SPI_CONTROLLER_SUSPENDED flag. It\n requires acquiring ctlr-\u003ebus_lock_mutex.\n\nStep one is irrelevant because cadence-qspi is not queued. Step two\nhowever has two implications:\n - A deadlock occurs, because -\u003eruntime_resume() is called in a context\n where the lock is already taken (in the -\u003eexec_op() callback, where\n the usage count is incremented).\n - It would disallow all operations once the device is auto-suspended.\n\nHere is a brief call tree highlighting the mutex deadlock:\n\nspi_mem_exec_op()\n ...\n spi_mem_access_start()\n mutex_lock(\u0026ctlr-\u003ebus_lock_mutex)\n\n cqspi_exec_mem_op()\n pm_runtime_resume_and_get()\n cqspi_resume()\n spi_controller_resume()\n mutex_lock(\u0026ctlr-\u003ebus_lock_mutex)\n ...\n\n spi_mem_access_end()\n mutex_unlock(\u0026ctlr-\u003ebus_lock_mutex)\n ..."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: spi: cadence-qspi: elimina las llamadas auxiliares de suspensi\u00f3n en todo el sistema desde los ganchos PM en tiempo de ejecuci\u00f3n No se espera que las devoluciones de llamada -\u0026gt;runtime_suspend() y -\u0026gt;runtime_resume() llamen a spi_controller_suspend() y spi_controller_resume(). Elimina llamadas a aquellos en el controlador cadence-qspi. Esos ayudantes tienen actualmente dos funciones: - Detienen/inician la cola, incluido el trato con el kworker. - Alternan el indicador SPI_CONTROLLER_SUSPENDED del controlador SPI. Requiere adquirir ctlr-\u0026gt;bus_lock_mutex. El primer paso es irrelevante porque cadence-qspi no est\u00e1 en cola. Sin embargo, el segundo paso tiene dos implicaciones: - Se produce un punto muerto, porque -\u0026gt;runtime_resume() se llama en un contexto donde el bloqueo ya est\u00e1 tomado (en la devoluci\u00f3n de llamada -\u0026gt;exec_op(), donde se incrementa el recuento de uso). - No permitir\u00eda todas las operaciones una vez que el dispositivo se autosuspenda. Aqu\u00ed hay un breve \u00e1rbol de llamadas que resalta el interbloqueo mutex: spi_mem_exec_op() ... spi_mem_access_start() mutex_lock(\u0026amp;ctlr-\u0026gt;bus_lock_mutex) cqspi_exec_mem_op() pm_runtime_resume_and_get() cqspi_resume() spi_controller_resume() mutex_lock(\u0026amp;ctlr-\u0026gt;bus_lock_mutex) ... spi_mem _acceso_end () mutex_unlock(\u0026amp;ctlr-\u0026gt;bus_lock_mutex) ..."
}
],
"id": "CVE-2024-26806",
"lastModified": "2025-03-27T21:30:21.837",
"metrics": {
"cvssMetricV31": [
{
"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": "2024-04-04T09:15:09.333",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
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"url": "https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365"
},
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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"url": "https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6"
},
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"url": "https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365"
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{
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"url": "https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6"
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],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-667"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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