In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
btrfs: fix extent map leak in NOCOW direct I\/O write<\/p>\n
btrfs_dio_iomap_begin() calls btrfs_get_extent(), which returns an
\nextent map reference that must be dropped on all exit paths.<\/p>\n
For direct writes into a NOCOW range, btrfs_get_blocks_direct_write()
\nkeeps using that extent map and asks btrfs_create_dio_extent() to
\nallocate the ordered extent. If that fails, for example because
\nbtrfs_alloc_ordered_extent() fails, the function returns the error
\nwithout dropping the input extent map. The PREALLOC path avoided this by
\ndropping the input extent map before replacing it with the newly created
\none.<\/p>\n
Check the error from btrfs_create_dio_extent() before replacing the
\nmap and drop the input extent map on failure.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
btrfs: fix extent map leak in NOCOW direct I\/O write<\/p>\n
btrfs_dio_iomap_begin() calls btrfs_get_extent(), which returns an
\nextent map<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21566","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21566","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=21566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21566"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}