CVE-2021-47096

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La user_pversion no se inicializ\u00f3 para la estructura de archivos del espacio de usuario en la funci\u00f3n abierta, porque la estructura privada del archivo usa kmalloc para la asignaci\u00f3n. El c\u00f3digo del secuenciador ALSA del kernel borra la estructura del archivo, por lo que no se requieren correcciones adicionales. 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