In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
md: wait for behind writes before destroying bitmap<\/p>\n
__md_stop() destroyed the bitmap before calling mddev_detach(). That made
\nmddev_detach() skip bitmap_ops->wait_behind_writes(), because the bitmap
\nwas already disconnected from mddev.<\/p>\n
This was still safe for the legacy bitmap because bitmap_destroy() waits
\nfor behind writes itself. llbitmap keeps that wait in its
\n->wait_behind_writes() operation instead, while ->destroy() tears down the
\nllbitmap storage. With the old ordering, RAID1 behind-write completions
\ncould still run after llbitmap storage had been freed.<\/p>\n
Call mddev_detach() before md_bitmap_destroy() so the common detach path
\ncan wait for behind writes while the bitmap is still alive. Only destroy
\nthe bitmap after those users are gone.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
md: wait for behind writes before destroying bitmap<\/p>\n
__md_stop() destroyed the bitmap before calling mddev_detach(). That made
\nmdde<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25687","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25687","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=25687"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25687"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25687"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}