{"id":94301,"date":"2020-09-15T13:42:05","date_gmt":"2020-09-15T11:42:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-iz-tekstovoj-konsoli-udalili-podderzhku-prokrutki-teksta"},"modified":"2020-09-15T13:42:05","modified_gmt":"2020-09-15T11:42:05","slug":"v-yadre-linux-iz-tekstovoj-konsoli-udalili-podderzhku-prokrutki-teksta","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/v-yadre-linux-iz-tekstovoj-konsoli-udalili-podderzhku-prokrutki-teksta","title":{"rendered":"No n\u00facleo do Linux, foi removido o suporte \u00e0 rolagem de texto do console de texto","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Da implementa\u00e7\u00e3o do console de texto inclu\u00eddo no n\u00facleo do Linux foi removido o c\u00f3digo<\/a><\/noindex>, que proporcionava a capacidade de rolar o texto para tr\u00e1s (CONFIG_VGACON_SOFT_SCROLLBACK). O c\u00f3digo foi removido devido \u00e0 exist\u00eancia de erros que n\u00e3o poderiam ser corrigidos pela falta de um mantenedor respons\u00e1vel pelo desenvolvimento do vgacon.<\/p>\n

No ver\u00e3o, foi identificada uma no lan\u00e7amento<\/a><\/noindex> vulnerabilidade (CVE-2020-14331), que poderia levar a um estouro de buffer devido \u00e0 falta de verifica\u00e7\u00f5es adequadas para a disponibilidade de mem\u00f3ria no buffer de rolagem. A vulnerabilidade chamou a aten\u00e7\u00e3o dos desenvolvedores, que organizaram testes de fuzzing no c\u00f3digo do vgacon syzbot<\/a><\/noindex>.<\/p>\n

. Verifica\u00e7\u00f5es adicionais revelaram v\u00e1rios problemas semelhantes no c\u00f3digo do vgacon, assim como problemas na implementa\u00e7\u00e3o de rolagem no driver fbcon. Infelizmente, o c\u00f3digo problem\u00e1tico tem permanecido sem manuten\u00e7\u00e3o h\u00e1 muito tempo, provavelmente porque os desenvolvedores migraram para o uso de consoles gr\u00e1ficos e os consoles de texto sa\u00edram de uso (as pessoas ainda usam os consoles vgacon e fbcon, mas h\u00e1 d\u00e9cadas n\u00e3o s\u00e3o a interface principal do n\u00facleo, e recursos avan\u00e7ados, como a rolagem integrada ao driver (Shift+PageUp\/PageDown), s\u00e3o, presumivelmente, pouco solicitados). <\/p>\n

Em vista disso, Linus Torvalds decidiu n\u00e3o tentar manter um c\u00f3digo desnecess\u00e1rio e simplesmente remov\u00ea-lo. Se houver usu\u00e1rios que considerem essa funcionalidade necess\u00e1ria, o c\u00f3digo para suporte \u00e0 rolagem no console ser\u00e1 retornado ao n\u00facleo assim que um mantenedor disposto a assumir sua manuten\u00e7\u00e3o se disponibilizar.<\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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