{"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\/da\/blog\/news\/v-yadre-linux-iz-tekstovoj-konsoli-udalili-podderzhku-prokrutki-teksta","title":{"rendered":"I Linux-kernen blev underst\u00f8ttelsen af tekstscrolling fjernet fra tekstkonsollen","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Fra den medf\u00f8lgende Linux-kernel-implementering af tekstkonsollen kode er fjernet<\/a><\/noindex>, der muligg\u00f8r rulle tilbage af teksten (CONFIG_VGACON_SOFT_SCROLLBACK). Koden blev fjernet p\u00e5 grund affejl, som ingen kunne rette, da der ikke var nogen vedligeholder tilknyttet udviklingen af vgacon.<\/p>\n

I sommeren blev der afsl\u00f8ret en er blevet l\u00f8st<\/a><\/noindex> s\u00e5rbarhed (CVE-2020-14331), der kunne f\u00f8re til buffer-overl\u00f8b p\u00e5 grund af manglende korrekt kontrol af tilg\u00e6ngelig hukommelse i rullebufferen. S\u00e5rbarheden tiltrak sig udviklernes opm\u00e6rksomhed, som organiserede fuzz-testning af koden i syzbot<\/a><\/noindex>.<\/p>\n

Yderligere kontroller afsl\u00f8rede flere lignende problemer i koden af vgacon samt problemer i den softwarem\u00e6ssige implementering af rulning i fbcon-driveren. Desv\u00e6rre har den problematiske kode l\u00e6nge v\u00e6ret uden st\u00f8tte, formodentlig fordi udviklerne er g\u00e5et over til at bruge grafiske konsoller, og tekstkonsoller er blevet mindre brugt (mennesker forts\u00e6tter med at bruge konsollerne vgacon og fbcon, men de har ikke v\u00e6ret hovedgr\u00e6nsefladen for kernen i \u00e5rtier, og avancerede funktioner som indbygget rulning i driveren (Shift+PageUp\/PageDown) er formodentlig ikke meget efterspurgte). <\/p>\n

Som f\u00f8lge heraf besluttede Linus Torvalds at stoppe med at vedligeholde den ubrugte kode og blot fjerne den. Hvis der dukker brugere op, som finder denne funktionalitet n\u00f8dvendig, vil koden til at st\u00f8tte rulning i konsollen blive genindsat i kernen, s\u00e5 snart der findes en vedligeholder, der er villig til at tage ansvaret for den.<\/p>\n

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

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

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