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This increased probability that a new PIO transfer would be\\nissued by kernel while previous one has not finished yet.\\n\\nAfter applying this change into the kernel, it is possible to revert the\\nmentioned TF-A hack and SError events do not have to be caught in TF-A EL3.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: PCI: aardvark: solucion\u00f3 el p\u00e1nico del kernel durante la transferencia de PIO. Intentar iniciar una nueva transferencia de PIO escribiendo el valor 0 en el registro PIO_START cuando la transferencia anterior a\u00fan no se ha completado (que se indica con el valor 1). en PIO_START) provoca un aborto externo en la CPU, lo que resulta en p\u00e1nico del kernel: Interrupci\u00f3n de SError en CPU0, c\u00f3digo 0xbf000002 - P\u00e1nico del kernel de SError - no se sincroniza: Interrupci\u00f3n de SError asincr\u00f3nica Para evitar el p\u00e1nico del kernel, es necesario rechazar una nueva transferencia de PIO cuando el anterior a\u00fan no ha terminado. Si la transferencia PIO anterior a\u00fan no ha finalizado, el kernel puede emitir una nueva solicitud PIO solo si se agot\u00f3 el tiempo de espera de la transferencia PIO anterior. En el pasado, la causa root de este problema se identific\u00f3 incorrectamente (como sucede a menudo durante el reentrenamiento del enlace o despu\u00e9s de un evento de ca\u00edda del enlace) y se implement\u00f3 un truco especial en Trusted Firmware para detectar todos los eventos de SError en EL3, para ignorar los errores con el c\u00f3digo 0xbf000002 y no reenviar cualquier otro error al kernel y en su lugar generar p\u00e1nico desde el controlador de firmware confiable EL3. 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