{"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\/hu\/blog\/news\/v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov","title":{"rendered":"Az OpenBSD-ben elj\u00e1r\u00e1sokat fogadtak el a folyamatok mem\u00f3ria v\u00e9delm\u00e9nek jav\u00edt\u00e1sa \u00e9rdek\u00e9ben.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Theo de Raadt \u00faj jav\u00edt\u00e1sokat adott a OpenBSD k\u00f3dj\u00e1hoz, amelyek a felhaszn\u00e1l\u00f3i folyamatok mem\u00f3ria v\u00e9delm\u00e9t c\u00e9lozz\u00e1k. A fejleszt\u0151k egy \u00faj rendszerh\u00edv\u00e1st \u00e9s egy azonos nev\u0171 k\u00f6nyvt\u00e1ri funkci\u00f3t, mimmutable, kaptak, amely lehet\u0151v\u00e9 teszi a hozz\u00e1f\u00e9r\u00e9si jogok r\u00f6gz\u00edt\u00e9s\u00e9t a mem\u00f3ria lek\u00e9pez\u00e9s (memory mappings) sor\u00e1n. A r\u00f6gz\u00edt\u00e9s ut\u00e1n a kijel\u00f6lt mem\u00f3ria ter\u00fcletre vonatkoz\u00f3 jogok, p\u00e9ld\u00e1ul a \u00edr\u00e1s \u00e9s v\u00e9grehajt\u00e1s tilalma, a k\u00e9s\u0151bbi mmap(), mprotect() \u00e9s munmap() h\u00edv\u00e1sokkal nem m\u00f3dos\u00edthat\u00f3k, \u00e9s a m\u00f3dos\u00edt\u00e1si k\u00eds\u00e9rletek EPERM hib\u00e1t adnak vissza. <\/p>\n

A \u00faj szakasz, a Mutable BSS (.openbsd.mutable, Mutable Block Starting Symbol) javasolt a f\u00e1jlobjektumok t\u00e1rolt mem\u00f3ri\u00e1j\u00e1nak jogosults\u00e1gainak megv\u00e1ltoztat\u00e1s\u00e1ra. \u00daj PF_MUTABLE \u00e9s UVM_ET_IMMUTABLE z\u00e1szl\u00f3k is hozz\u00e1ad\u00e1sra ker\u00fcltek. A linkerbe t\u00e1mogat\u00e1st \u00e9p\u00edtettek be az «openbsd.mutable» szakaszok meghat\u00e1roz\u00e1s\u00e1hoz \u00e9s azok BSS-en bel\u00fcli k\u00fcl\u00f6n mem\u00f3ria\u00e9rtelmez\u00e9sbe val\u00f3 elhelyez\u00e9s\u00e9hez, amely a mem\u00f3riaoldalak hat\u00e1r\u00e1hoz van igaz\u00edtva. Az mimmutable f\u00fcggv\u00e9ny h\u00edv\u00e1s\u00e1val lehet\u0151s\u00e9g ny\u00edlik az \u00f6sszes t\u00e1rolt ter\u00fclet megjel\u00f6l\u00e9s\u00e9re v\u00e1ltozhatatlank\u00e9nt (immutable), kiv\u00e9ve az «openbsd.mutable» szakaszokat. Az \u00faj funkci\u00f3 az OpenBSD 7.3 verzi\u00f3ban v\u00e1lik el\u00e9rhet\u0151v\u00e9 a felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra.
\n
Forr\u00e1s: 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\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\udd47Az OpenBSD-ben m\u00f3dos\u00edt\u00e1sokat fogadtak el a folyamatok mem\u00f3ria v\u00e9delm\u00e9nek fokoz\u00e1s\u00e1ra | ProHoster","description":"Theo de Raadt \u00faj jav\u00edt\u00e1sokat adott a OpenBSD k\u00f3dj\u00e1hoz, amelyek a felhaszn\u00e1l\u00f3i folyamatok mem\u00f3ria v\u00e9delm\u00e9t c\u00e9lozz\u00e1k.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","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 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