In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
fuse-uring: fix data races on ring->ready<\/p>\n
On weakly-ordered architectures, the store to fiq->ops can be
\nreordered past the store to ring->ready, allowing a CPU that sees
\nring->ready == true via fuse_uring_ready() to dispatch requests
\nthrough a stale fiq->ops pointer. Upgrade the store to
\nsmp_store_release() and the load in fuse_uring_ready() to
\nsmp_load_acquire() so that the preceding WRITE_ONCE(fiq->ops, …)
\nis visible to any CPU that observes ring->ready == true.<\/p>\n
Additionally, fuse_uring_do_register() publishes ring->ready with
\nWRITE_ONCE() but the fast-path check reads it with a plain load.
\nThis is a marked-vs-unmarked access that KCSAN will flag. Wrap it in
\nREAD_ONCE() to mark it without adding unnecessary ordering.<\/p>\n
Also wrap the fc->ring load in fuse_uring_ready() in READ_ONCE() to
\nprevent the compiler from reloading it between the NULL check and the
\ndereference.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
fuse-uring: fix data races on ring->ready<\/p>\n
On weakly-ordered architectures, the store to fiq->ops can be
\nreordered past the store t<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-4878","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/4878","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=4878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}