{"id":105272,"date":"2022-10-09T09:37:09","date_gmt":"2022-10-09T07:37:09","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov"},"modified":"2022-10-09T09:37:09","modified_gmt":"2022-10-09T07:37:09","slug":"v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov","title":{"rendered":"W OpenBSD przyj\u0119to zmiany maj\u0105ce na celu dodatkow\u0105 ochron\u0119 pami\u0119ci proces\u00f3w","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Theo de Raadt doda\u0142 do bazy kodu OpenBSD szereg poprawek maj\u0105cych na celu dodatkow\u0105 ochron\u0119 pami\u0119ci proces\u00f3w w przestrzeni u\u017cytkownika. Programi\u015bci otrzymali nowy wywo\u0142anie systemowe oraz zwi\u0105zan\u0105 z nim funkcj\u0119 biblioteczn\u0105 o tej samej nazwie mimmutable, kt\u00f3ra pozwala na zablokowanie praw dost\u0119pu przy odwzorowywaniu w pami\u0119ci (memory mappings). Po zablokowaniu, nadane prawam dost\u0119pu do obszaru pami\u0119ci, na przyk\u0142ad zakaz zapisu i wykonania, nie mo\u017cna zmieni\u0107 za pomoc\u0105 p\u00f3\u017aniejszych wywo\u0142a\u0144 funkcji mmap(), mprotect() i munmap(), kt\u00f3re przy pr\u00f3bie zmiany zwr\u00f3c\u0105 b\u0142\u0105d EPERM. <\/p>\n

Aby zarz\u0105dza\u0107 mo\u017cliwo\u015bci\u0105 zmiany praw pami\u0119ci odwzorowanych dla plik\u00f3w obiektowych, wprowadzono now\u0105 sekcj\u0119 Mutable BSS (.openbsd.mutable, Mutable Block Starting Symbol) oraz dodano nowe flagi PF_MUTABLE i UVM_ET_IMMUTABLE. Do linkera dodano wsparcie dla definiowania sekcji \u201eopenbsd.mutable\u201d i umieszczania ich w osobnym obszarze BSS, wyr\u00f3wnanym do granicy strony pami\u0119ci. Poprzez wywo\u0142anie funkcji mimmutable u\u017cytkownik ma mo\u017cliwo\u015b\u0107 oznaczenia wszystkich odwzorowanych obszar\u00f3w jako niezmiennych (immutable), z wyj\u0105tkiem sekcji oznaczonych jako \u201eopenbsd.mutable\u201d. Nowa funkcjonalno\u015b\u0107 b\u0119dzie dost\u0119pna dla u\u017cytkownik\u00f3w w wydaniu OpenBSD 7.3.
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0422\u044d\u043e \u0434\u0435 \u0420\u0430\u0430\u0434\u0442 (Theo de Raadt) \u0434\u043e\u0431\u0430\u0432\u0438\u043b \u0432 \u043a\u043e\u0434\u043e\u0432\u0443\u044e \u0431\u0430\u0437\u0443 OpenBSD \u0441\u0435\u0440\u0438\u044e \u043f\u0430\u0442\u0447\u0435\u0439 \u0434\u043b\u044f \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0437\u0430\u0449\u0438\u0442\u044b \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f. \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u043c \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d \u043d\u043e\u0432\u044b\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0439 \u0432\u044b\u0437\u043e\u0432 \u0438 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u043d\u0438\u043c \u043e\u0434\u043d\u043e\u0438\u043c\u0451\u043d\u043d\u0430\u044f \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u0447\u043d\u0430\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u044f mimmutable, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0437\u0430\u0444\u0438\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u0430\u0432\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043f\u0440\u0438 \u043e\u0442\u0440\u0430\u0436\u0435\u043d\u0438\u0438 \u0432 \u043f\u0430\u043c\u044f\u0442\u044c (memory mappings). \u041f\u043e\u0441\u043b\u0435 \u0444\u0438\u043a\u0441\u0430\u0446\u0438\u0438, \u0432\u044b\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u0434\u043b\u044f \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u0430\u0432\u0430, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0437\u0430\u043f\u0440\u0435\u0442 \u043d\u0430 \u0437\u0430\u043f\u0438\u0441\u044c […]<\/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-105272","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\udd47W OpenBSD przyj\u0119to zmiany maj\u0105ce na celu dodatkow\u0105 ochron\u0119 pami\u0119ci proces\u00f3w | ProHoster","description":"Theo de Raadt doda\u0142 do bazy kodu OpenBSD szereg poprawek maj\u0105cych na celu dodatkow\u0105 ochron\u0119 pami\u0119ci proces\u00f3w w przestrzeni u\u017cytkownika.","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0412 OpenBSD \u043f\u0440\u0438\u043d\u044f\u0442\u044b \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0437\u0430\u0449\u0438\u0442\u044b \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 | ProHoster","og:description":"\u0422\u044d\u043e \u0434\u0435 \u0420\u0430\u0430\u0434\u0442 (Theo de Raadt) \u0434\u043e\u0431\u0430\u0432\u0438\u043b \u0432 \u043a\u043e\u0434\u043e\u0432\u0443\u044e \u0431\u0430\u0437\u0443 OpenBSD \u0441\u0435\u0440\u0438\u044e \u043f\u0430\u0442\u0447\u0435\u0439 \u0434\u043b\u044f \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0437\u0430\u0449\u0438\u0442\u044b \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f.","og:url":"https:\/\/prohoster.info\/pl\/blog\/news\/v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2022-10-09T07:37:09+00:00","article:modified_time":"2022-10-09T07:37:09+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/105272","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/comments?post=105272"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/105272\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/media?parent=105272"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/categories?post=105272"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/tags?post=105272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}