Linus Torvalds ten\u00eda la intenci\u00f3n de publicar la versi\u00f3n del kernel Linux 6.13 este domingo, pero es probable que la prueba de la rama 6.13 se extienda una semana debido a problemas de estabilidad en los cambios realizados por un empleado de Microsoft y aceptados en la rama 6.13 en noviembre. Adem\u00e1s, se se\u00f1ala que el parche que caus\u00f3 el fallo fue presentado de manera no est\u00e1ndar, pero fue aceptado, aunque no recibi\u00f3 ninguna confirmaci\u00f3n (ACK) de los mantenedores de la arquitectura x86, lo que constituye una violaci\u00f3n de las pr\u00e1cticas comunes. <\/p>\n
El parche a\u00f1ad\u00eda la posibilidad de usar grandes p\u00e1ginas de memoria en modo ROX (Read Only Execute) al asignar memoria destinada a contener c\u00f3digo ejecutable. ROX permite utilizar memoria con c\u00f3digo ejecutable en modo solo lectura, lo que complica la explotaci\u00f3n de algunas vulnerabilidades. En el n\u00facleo 6.13, para el c\u00f3digo ejecutable de los m\u00f3dulos en sistemas x86_64, se activ\u00f3 por defecto el uso de cach\u00e9 de grandes p\u00e1ginas ejecutables de memoria, reflejadas como ROX. El cambio solucion\u00f3 el problema de mapeo en modo ROX de p\u00e1ginas para el c\u00f3digo ejecutable a\u00fan no completamente formado y permiti\u00f3 evitar la re-mapeo temporal de las p\u00e1ginas ROX en modo de escritura antes de completar la preparaci\u00f3n de los m\u00f3dulos del n\u00facleo para su funcionamiento. <\/p>\n
En la etapa final de prueba del n\u00facleo 6.13, un ingeniero de Intel identific\u00f3 un fallo que imped\u00eda al n\u00facleo salir correctamente del modo de suspensi\u00f3n en algunos port\u00e1tiles con procesadores Intel (por ejemplo, con CPU basadas en la microarquitectura Alderlake). La falla se manifestaba al compilar el n\u00facleo con el compilador Clang con el modo de protecci\u00f3n CFI (Control Flow Integrity) activado, que bloquea las violaciones del orden normal de ejecuci\u00f3n (control flow) como resultado de la aplicaci\u00f3n de exploits que modifican los punteros a funciones almacenados en la memoria. Como soluci\u00f3n temporal, los mantenedores de Intel y AMD, responsables de la arquitectura x86, propusieron desactivar el uso de EXECMEM_ROX en el n\u00facleo 6.13, hasta que se prepare y pruebe un parche completo que resuelva el problema (la primera opci\u00f3n de soluci\u00f3n no lo resolvi\u00f3). \u041b\u0438\u043d\u0443\u0441 \u0422\u043e\u0440\u0432\u0430\u043b\u044c\u0434\u0441 \u043d\u0430\u043c\u0435\u0440\u0435\u0432\u0430\u043b\u0441\u044f \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u0442\u044c \u0440\u0435\u043b\u0438\u0437 \u044f\u0434\u0440\u0430 Linux 6.13 \u0432 \u044d\u0442\u043e \u0432\u043e\u0441\u043a\u0440\u0435\u0441\u0435\u043d\u044c\u0435, \u043d\u043e \u0441\u043a\u043e\u0440\u0435\u0435 \u0432\u0441\u0435\u0433\u043e \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0432\u0435\u0442\u043a\u0438 6.13 \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u043e\u0434\u043b\u0435\u043d\u043e \u043d\u0430 \u043d\u0435\u0434\u0435\u043b\u044e \u0438\u0437-\u0437\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441\u043e \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u044e \u0432 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f\u0445, \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0441\u043e\u0442\u0440\u0443\u0434\u043d\u0438\u043a\u043e\u043c Microsoft \u0438 \u043f\u0440\u0438\u043d\u044f\u0442\u044b\u0445 \u0432 \u0432\u0435\u0442\u043a\u0443 6.13 \u0432 \u043d\u043e\u044f\u0431\u0440\u0435. \u0414\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u043f\u0430\u0442\u0447, \u0441\u0442\u0430\u0432\u0448\u0438\u0439 \u043f\u0440\u0438\u0447\u0438\u043d\u043e\u0439 \u0441\u0431\u043e\u044f, \u0431\u044b\u043b \u043f\u043e\u0434\u0430\u043d \u043d\u0435\u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e — \u043d\u043e \u0431\u044b\u043b \u043f\u0440\u0438\u043d\u044f\u0442, \u0445\u043e\u0442\u044f \u043d\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u043b \u043d\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-121343","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47En el n\u00facleo de Linux 6.13 que se prepara para su lanzamiento, se ha detectado un fallo causado por el c\u00f3digo de un empleado de Microsoft | ProHoster","description":"Linus Torvalds ten\u00eda la intenci\u00f3n de publicar la versi\u00f3n del n\u00facleo 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Fuente: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"