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https://github.com/fkie-cad/nvd-json-data-feeds.git
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37 lines
3.8 KiB
JSON
37 lines
3.8 KiB
JSON
{
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"id": "CVE-2022-48817",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-07-16T12:15:05.747",
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"lastModified": "2024-07-16T13:43:58.773",
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"vulnStatus": "Awaiting Analysis",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: ar9331: register the mdiobus under devres\n\nAs explained in commits:\n74b6d7d13307 (\"net: dsa: realtek: register the MDIO bus under devres\")\n5135e96a3dd2 (\"net: dsa: don't allocate the slave_mii_bus using devres\")\n\nmdiobus_free() will panic when called from devm_mdiobus_free() <-\ndevres_release_all() <- __device_release_driver(), and that mdiobus was\nnot previously unregistered.\n\nThe ar9331 is an MDIO device, so the initial set of constraints that I\nthought would cause this (I2C or SPI buses which call ->remove on\n->shutdown) do not apply. But there is one more which applies here.\n\nIf the DSA master itself is on a bus that calls ->remove from ->shutdown\n(like dpaa2-eth, which is on the fsl-mc bus), there is a device link\nbetween the switch and the DSA master, and device_links_unbind_consumers()\nwill unbind the ar9331 switch driver on shutdown.\n\nSo the same treatment must be applied to all DSA switch drivers, which\nis: either use devres for both the mdiobus allocation and registration,\nor don't use devres at all.\n\nThe ar9331 driver doesn't have a complex code structure for mdiobus\nremoval, so just replace of_mdiobus_register with the devres variant in\norder to be all-devres and ensure that we don't free a still-registered\nbus."
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: net: dsa: ar9331: registrar el mdiobus en devres Como se explica en commits: 74b6d7d13307 (\"net: dsa: realtek: registrar el bus MDIO en devres\") 5135e96a3dd2 (\"net: dsa: no asigne el Slave_mii_bus usando devres\") mdiobus_free() entrar\u00e1 en p\u00e1nico cuando se llame desde devm_mdiobus_free() <- devres_release_all() <- __device_release_driver(), y ese mdiobus no fue anulado previamente. El ar9331 es un dispositivo MDIO, por lo que el conjunto inicial de restricciones que pens\u00e9 que causar\u00edan esto (buses I2C o SPI que llaman ->eliminar en ->apagar) no se aplican. Pero hay algo m\u00e1s que se aplica aqu\u00ed. Si el maestro DSA est\u00e1 en un bus que llama ->remove from ->shutdown (como dpaa2-eth, que est\u00e1 en el bus fsl-mc), hay un enlace de dispositivo entre el conmutador y el maestro DSA, y device_links_unbind_consumers( ) desvincular\u00e1 el controlador del interruptor ar9331 al apagar. Por lo tanto, se debe aplicar el mismo tratamiento a todos los controladores de conmutador DSA, que es: usar devres tanto para la asignaci\u00f3n como para el registro de mdiobus, o no usar devres en absoluto. El controlador ar9331 no tiene una estructura de c\u00f3digo compleja para la eliminaci\u00f3n de mdiobus, as\u00ed que simplemente reemplace of_mdiobus_register con la variante devres para que sea todo devres y garantizar que no liberemos un bus a\u00fan registrado."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/475ce5dcf2d88fd4f3c213a0ac944e3e40702970",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/50facd86e9fbc4b93fe02e5fe05776047f45dbfb",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/aae1c6a1d3d696fc33b609fb12fe744a556d1dc5",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/f1842a8cb71de4d7eb75a86f76e88c7ee739218c",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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} |