In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
md\/raid1: don’t set array_frozen in raid1_takeover()<\/p>\n
raid1_takeover() sets conf->array_frozen = 1 on the newly-allocated
\nr1conf and nothing ever clears it, so every I\/O to the array stalls
\npermanently once _wait_barrier() sees it stuck at 1.<\/p>\n
This used to be harmless: level_store() called mddev_resume() right
\nafter pers->run(), which called raid1_quiesce(mddev, 0) and cleared
\narray_frozen back to 0 regardless of what raid1_takeover() set. Commit
\nb39f35ebe86d (“md: don’t quiesce in mddev_suspend()”) removed that
\nquiesce(mddev, 0) call, so the pre-set now sticks.<\/p>\n
setup_conf() already zero-initializes the new r1conf via kzalloc, so
\njust don’t set array_frozen here.<\/p>\n
Same class of bug as commit 892da88d1cd9 (“md\/raid10: fix a
\n‘conf->barrier’ leakage in raid10_takeover()”), also triggered by
\nb39f35ebe86d.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
md\/raid1: don’t set array_frozen in raid1_takeover()<\/p>\n
raid1_takeover() sets conf->array_frozen = 1 on the newly-allocated
\nr1conf an<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25684","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=25684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}