{"id":145102,"date":"2025-10-14T17:12:00","date_gmt":"2025-10-14T15:12:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/tehnicheskij-komitet-utverdil-izmenenie-povedeniya-systemd-v-debian"},"modified":"2025-10-14T17:12:00","modified_gmt":"2025-10-14T15:12:00","slug":"tehnicheskij-komitet-utverdil-izmenenie-povedeniya-systemd-v-debian","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/tehnicheskij-komitet-utverdil-izmenenie-povedeniya-systemd-v-debian","title":{"rendered":"Technick\u00fd v\u00fdbor schv\u00e1lil zm\u011bnu chov\u00e1n\u00ed systemd v Debianu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Technick\u00fd v\u00fdbor, kter\u00fd p\u0159ij\u00edm\u00e1 kone\u010dn\u00e9 rozhodnut\u00ed ohledn\u011b sporn\u00fdch technick\u00fdch ot\u00e1zk\u00e1ch v projektu Debian, schv\u00e1lil zm\u011bnu v bal\u00ed\u010dku systemd, kter\u00e1 m\u011bn\u00ed chov\u00e1n\u00ed p\u0159i pr\u00e1ci s adres\u00e1\u0159em \/var\/lock. Syst\u00e9mov\u00fd spr\u00e1vce systemd od verze 258 omezil mo\u017enost z\u00e1pisu do adres\u00e1\u0159e \/var\/lock pouze na u\u017eivatele s pr\u00e1vy root, zat\u00edmco technick\u00fd v\u00fdbor Debian schv\u00e1lil zachov\u00e1n\u00ed star\u00e9ho chov\u00e1n\u00ed, kter\u00e9 povoluje z\u00e1pis do \/var\/lock v\u0161em u\u017eivatel\u016fm. <\/p>\n

Pravidla projektu Debian p\u0159edpisuj\u00ed zachov\u00e1n\u00ed p\u016fvodn\u00edho chov\u00e1n\u00ed aplikac\u00ed (nastaven\u00ed nastaven\u00fdch v upstream) p\u0159i sestavov\u00e1n\u00ed bal\u00ed\u010dk\u016f. Pro proveden\u00ed specifick\u00fdch zm\u011bn pro Debian v bal\u00ed\u010dk\u00e1ch, kter\u00e9 obch\u00e1zej\u00ed pravidla projektu, je nutn\u00e9 z\u00edskat zvl\u00e1\u0161tn\u00ed povolen\u00ed od technick\u00e9ho v\u00fdboru. <\/p>\n

V p\u0159\u00edpad\u011b systemd v\u00fdbor podpo\u0159il n\u00e1vrh ne\u0159\u00eddit se zm\u011bnou, kter\u00e1 m\u011bn\u00ed pr\u00e1va p\u0159\u00edstupu k \/var\/lock s c\u00edlem zv\u00fd\u0161it bezpe\u010dnost, proto\u017ee mo\u017enost ve\u0159ejn\u00e9ho z\u00e1pisu do adres\u00e1\u0159e \/var\/lock je uvedena ve specifikaci FHS (Filesystem Hierarchy Standard) a je nezbytn\u00e1 pro pokra\u010dov\u00e1n\u00ed pr\u00e1ce n\u011bkter\u00fdch existuj\u00edc\u00edch program\u016f. Nap\u0159\u00edklad aplikace pro pr\u00e1ci s s\u00e9riov\u00fdmi porty, jako jsou uucp, minicom, mgetty+sendfax a hylafax, pou\u017e\u00edvaj\u00ed adres\u00e1\u0159 \/var\/lock pro odd\u011blen\u00ed p\u0159\u00edstupu k za\u0159\u00edzen\u00edm \/dev\/ttyS* vytv\u00e1\u0159en\u00edm blokovac\u00edch soubor\u016f. <\/p>\n

Pot\u0159eba omezen\u00ed p\u0159\u00edstupu k adres\u00e1\u0159i \/var\/lock je vysv\u011btlena v\u00fdvoj\u00e1\u0159i systemd jako ochrana proti DoS \u00fatok\u016fm. Adres\u00e1\u0159 \/var\/lock je symbolick\u00fdm odkazem na adres\u00e1\u0159 \/run\/lock. Odd\u00edl s adres\u00e1\u0159em \/run se obvykle montuje odd\u011blen\u011b p\u0159es tmpfs a mo\u017enost nekontrolovan\u00e9ho z\u00e1pisu do n\u011bj m\u016f\u017ee b\u00fdt vyu\u017eita k p\u0159ete\u010den\u00ed odd\u00edlu a zablokov\u00e1n\u00ed vytvo\u0159en\u00ed nov\u00fdch soubor\u016f v hierarchii \/run. <\/p>\n

Aby se vylou\u010dilo prov\u00e1d\u011bn\u00ed podobn\u00fdch \u00fatok\u016f p\u0159i neomezen\u00e9m p\u0159\u00edstupu, byl d\u0159\u00edve v Debi\u00e1nu pou\u017eit patch, kter\u00fd p\u0159ipojil \/run\/lock do samostatn\u00e9 mal\u00e9 tmpfs \u010d\u00e1sti. V lo\u0148sk\u00e9m roce byl tento patch nahrazen jednotkou run-lock.mount, a toto l\u00e9to byla tato jednotka odstran\u011bna, co\u017e vedlo k tomu, \u017ee \/run\/lock se ocitl v \u010d\u00e1sti \/run. V koment\u00e1\u0159\u00edch k rozhodnut\u00ed technick\u00e9ho v\u00fdboru b\u00fdval\u00fd \u00fadr\u017eb\u00e1\u0159 systemd doporu\u010dil nezapom\u00ednat na uvedenou zm\u011bnu a vr\u00e1tit se k samostatn\u00e9mu p\u0159ipojen\u00ed \/run\/lock, a v dlouhodob\u00e9m horizontu p\u0159ev\u00e9st v\u0161echny aplikace, kter\u00e9 z\u00e1vis\u00ed na \/run\/lock, na blokace pomoc\u00ed mechanismu flock.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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