gsd-2024-26806
Vulnerability from gsd
Modified
2024-02-20 06:02
Details
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)
...
Aliases
{ "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2024-26806" ], "details": "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 ...", "id": "GSD-2024-26806", "modified": "2024-02-20T06:02:29.073116Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "cve@kernel.org", "ID": "CVE-2024-26806", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "\u003c", "version_name": "0578a6dbfe75", "version_value": "041562ebc475" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "affected", "versions": [ { "status": "affected", "version": "6.7" }, { "lessThan": "6.7", "status": "unaffected", "version": "0", "versionType": "custom" }, { "lessThanOrEqual": "6.7.*", "status": "unaffected", "version": "6.7.9", "versionType": "custom" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix" } ] } } ] } } ] }, "vendor_name": "Linux" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "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 ..." } ] }, "generator": { "engine": "bippy-e0c11145c45e" }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "references": { "reference_data": [ { "name": "https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365" }, { "name": "https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6" } ] } }, "nvd.nist.gov": { "cve": { "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": "2024-04-04T12:48:22.650", "metrics": {}, "published": "2024-04-04T09:15:09.333", "references": [ { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6" } ], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis" } } } }
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Sightings
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Nomenclature
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