{"id":41014,"date":"2020-02-05T10:07:45","date_gmt":"2020-02-05T07:07:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/vypusk-sistemnoj-biblioteki-glibc-2-31"},"modified":"2020-02-05T10:07:45","modified_gmt":"2020-02-05T07:07:45","slug":"vypusk-sistemnoj-biblioteki-glibc-2-31","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/vypusk-sistemnoj-biblioteki-glibc-2-31","title":{"rendered":"Vabastamine s\u00fcsteemiraamatukogust Glibc 2.31","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>P\u00e4rast kuue kuu arendust\u00f6\u00f6d <noindex><a rel=\"nofollow\" href=\"https:\/\/sourceware.org\/ml\/libc-alpha\/2020-02\/msg00010.html\">avaldatud<\/a><\/noindex> s\u00fcsteemiraamatukogu v\u00e4ljaanne <noindex><a rel=\"nofollow\" href=\"http:\/\/ftp.gnu.org\/gnu\/glibc\/\">GNU C raamatukogu<\/a><\/noindex> (glibc) <noindex><a rel=\"nofollow\" href=\"http:\/\/sourceware.org\/glibc\/wiki\/Release\/2.31\">2.31<\/a><\/noindex>, mis vastab t\u00e4ielikult ISO C11 ja POSIX.1-2008 standardite n\u00f5uetele. Uue v\u00e4ljaande koostises on parandused 58 arendajalt. <\/p>\n<p>Glibc 2.31-sse rakendatud <noindex><a rel=\"nofollow\" href=\"http:\/\/sourceware.org\/git\/?p=glibc.git;a=blob_plain;f=NEWS;hb=HEAD\">t\u00e4iendusi<\/a><\/noindex> poolelt v\u00f5ib m\u00e4rkida:\n<\/p>\n<ul>\n<li class=\"l\"> Rohkem v\u00f5imaluste aktiveerimiseks on lisatud makro _ISOC2X_SOURCE, mis kehtivad tulevase ISO standardi mustandi versioonis <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/C2x\">C2X<\/a><\/noindex>. Need on v\u00f5imalikud, kui kasutatakse makrot _GNU_SOURCE v\u00f5i kui GCC kompileeritakse lipuga &#171;-std=gnu2x&#187;;\n<li class=\"l\"> Teatud 'math.h' p\u00e4isefailis olevate funktsioonide puhul, mis \u00fcmardavad oma tulemusi v\u00e4iksema suurusega t\u00fc\u00fcbile, on 'tgmath.h' failis pakkuda vastavad \u00fcldty\u00fcbist makrod, nagu n\u00f5uavad spetsifikatsioonid TS 18661-1:2014 ja TS 18661-3:2015;\n<li class=\"l\"> Lisatud on funktsioon pthread_clockjoin_np(), mis ootab, kuni teema l\u00f5peb ajam\u00e4\u00e4ra arvesse v\u00f5tmisega (kui ajam\u00e4\u00e4r j\u00f5uab enne l\u00f5petamist, tagastab funktsioon vea). Erinevalt <noindex><a rel=\"nofollow\" href=\"https:\/\/linux.die.net\/man\/3\/pthread_timedjoin_np\">pthread_timedjoin_np()<\/a><\/noindex>, pthread_clockjoin_np() funktsioonis on lubatud m\u00e4\u00e4rata taimeri t\u00fc\u00fcp ajam\u00e4\u00e4ra arvutamiseks \u2014 CLOCK_MONOTONIC (arvestab aega, mille s\u00fcsteem on unere\u017eiimis) v\u00f5i CLOCK_REALTIME;\n<li class=\"l\"> DNS-looderisse on lisatud tugi trust-ad valikule failis \/etc\/resolv.conf ja RES_TRUSTAD lipp _res.options, mis v\u00f5imaldab DNS-p\u00e4ringutes edastada DNSSEC-lipu. <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc3655\">AD<\/a><\/noindex> (authenticated data). Sel re\u017eiimil on serveri poolt seatud AD-lipp rakendustele kergesti kergesti kergesti, mis kutsuvad \u00fcles funktsioone, nagu res_search(). Vaikimisi ei m\u00e4\u00e4rata glibc, kui soovitatud valikud ei ole lubatud, AD-lippu p\u00e4ringutes ja puhastab selle automaatselt vastustes, mis viitab DNSSEC-i kontrolli puudumisele.\n<li class=\"l\"> N\u00fc\u00fcd ei ole Glibc s\u00fcsteemik\u00f5nede t\u00f6\u00f6tavate m\u00e4histe koostamiseks vajalik Linuxi kerneli pealkirjade installimine. Erandiks on 64-bitine arhitektuur RISC-V.\n<li class=\"l\"> Eemaldatud <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=CVE-2019-19126\">haavatavus<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-19126\">CVE-2019-19126<\/a><\/noindex>, mis v\u00f5imaldab \u00fcmber minna<br \/>\nASLR kaitsele setuidiga programmides ja m\u00e4\u00e4rata laadimistabelite aadresside paigutuse, manipuleerides keskkonnamuutuja LD_PREFER_MAP_32BIT_EXEC.<\/p>\n<\/ul>\n<p> Muutused, mis rikuvad \u00fchilduvust:<\/p>\n<ul>\n<li class=\"l\"> Funktsioonides totalorder(), totalordermag() ja sarnastes, mis puudutavad muid ujuvate komade t\u00fc\u00fcpe, v\u00f5tavad n\u00fc\u00fcd argumentideks n\u00e4idikud, et v\u00e4ltida hoiatusi v\u00e4\u00e4rtuste \u00fclekandmisest. <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/NaN\">NaN<\/a><\/noindex>, vastavalt TS 18661-1 soovitustele, mis on tehtud tulevase C2X standardi jaoks.<br \/>\nOlemasolevad t\u00e4idetavad failid, kus ujuvkomaga argumendid edastatakse otse, j\u00e4tkavad t\u00f6\u00f6le muutmata;<\/p>\n<li class=\"l\"> Pikka aega kuulutatud vananenud funktsioon stime ei ole enam kergesti seostatav glibc binaarfailide jaoks, ja selle m\u00e4\u00e4ratlemine on ajast.h failist eemaldatud. S\u00fcsteemi aega tuleb seadistamiseks kasutada funktsiooni clock_settime. Edasi plaanitakse eemaldada samuti vananenud funktsioon ftime ja pealkirjafail sys\/timeb.h (ftime asemel tuleks kasutada gettimeofday v\u00f5i clock_gettime);\n<li class=\"l\"> Funktsioon gettimeofday ei edasta enam s\u00fcsteemi ajav\u00f6\u00f6ndi teavet (see funktsioon oli aktuaalne 4.2-BSD ajal ja on juba aastaid vananenud). Argumenti 'tzp' tuleb n\u00fc\u00fcd esitada nullviitena, ning praeguse aja kohase ajav\u00f6\u00f6ndi saamiseks tuleks kasutada funktsiooni localtime(). Kui gettimeofday'i kutsutakse mittet\u00fchja argumendiga 'tzp', tagastatakse aja struktuuris t\u00fchjad v\u00e4ljad tz_minuteswest ja tz_dsttime. Funktsioon gettimeofday ise loetakse POSIX-s vananenuks (soovitatav on kasutada clock_gettime'i), kuid selle eemaldamine glibc-st pole plaanis;\n<li class=\"l\"> Funktsioonis settimeofday on l\u00f5petatud toimetamise toetamine aja ja kohandamisparameetrite samaaegseks edastamiseks. Kui settimeofday\u2019i kutsuda, peab \u00fcks argumentidest (aeg v\u00f5i peegeldus) olema tingimata m\u00e4\u00e4ratud nulliasemele, vastasel juhul l\u00f5petatakse funktsiooni kutsumine veaga EINVAL. Nagu gettimeofday, loetakse funktsiooni settimeofday POSIX-is vananenuks ja selle asemel soovitatakse kasutada funktsiooni clock_settime v\u00f5i adjtime funktsioonide perekonda.\n<li class=\"l\"> Toetust SPARC ISA v7 arhitektuurile on l\u00f5petatud (v8 toetust hoitakse endiselt, kuid ainult protsessorite jaoks, mis toetavad CAS-i k\u00e4ske, nagu LEON protsessorid, kuid mitte SuperSPARC protsessorid).\n<li class=\"l\"> Kui linkimine eba\u00f5nnestub re\u017eiimis '<noindex><a rel=\"nofollow\" href=\"https:\/\/docs.oracle.com\/cd\/E23824_01\/html\/819-0690\/chapter3-7.html\">laisk<\/a><\/noindex>', kus linkija ei otsi funktsioonide s\u00fcmboleid enne nende esmakordset kasutamist, l\u00f5petab funktsioon dlopen n\u00fc\u00fcd protsessi toimimise (varasema eba\u00f5nnestumise korral tagastati NULL);\n<li class=\"l\"> ABI MIPS hard-float jaoks kasutatakse n\u00fc\u00fcd t\u00e4itmissteeki, kui kokkupanekul ei ole selges\u00f5naliselt m\u00e4\u00e4ratud piirangut kasutada Linuxi kernelit 4.8+ parameetriga '--enable-kernel=4.8.0' (kuni 4.8 tuumade puhul esinevad mitmete MIPS konfiguratsioonide puhul t\u00f5rked);\n<li class=\"l\"> Ajavahemike manipuleerimise s\u00fcsteemi k\u00f5nede peale on \u00fclemineku teinud s\u00fcsteemikutse time64 kasutusele, kui see on olemas (32-bitistes glibc s\u00fcsteemides proovib esmalt kasutada uusi aega manipuleerivaid s\u00fcsteemi k\u00f5nesid 64-bitise t\u00fc\u00fcbi jaoks, ja kui neid pole, l\u00fclitub vanadele 32-bitistele kutsetele).\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Allikas: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52293\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.31, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 ISO C11 \u0438 POSIX.1-2008. \u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0442 58 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432. \u0418\u0437 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0432 Glibc 2.31 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d \u043c\u0430\u043a\u0440\u043e\u0441 _ISOC2X_SOURCE \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439, \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u0432 \u0447\u0435\u0440\u043d\u043e\u0432\u043e\u043c \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0435 \u0431\u0443\u0434\u0443\u0449\u0435\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430 ISO C2X. \u0414\u0430\u043d\u043d\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 [&hellip;]<\/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":[],"tags":[],"class_list":["post-41014","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.31, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 ISO C11 \u0438 POSIX.1-2008. \u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0442 58 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432. \u0418\u0437 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0432 Glibc 2.31 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d \u043c\u0430\u043a\u0440\u043e\u0441 _ISOC2X_SOURCE \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f 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\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\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0412\u044b\u043f\u0443\u0441\u043a \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 Glibc 2.31 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.31, 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