In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
fuse: fix missing barrier when checking io-uring readiness<\/p>\n
fuse_block_alloc() reads fch->initialized and then fch->io_uring.
\nfch->io_uring is set before fch->initialized, ordered by the smp_wmb()
\nin fuse_chan_set_intialized(), but fuse_block_alloc() has no matching
\nread barrier between the two loads.<\/p>\n
This may lead a CPU to observe fch->initialized=1 but fch->io_uring=0,
\nand skip the check that blocks request allocation until the io-uring
\nqueues are ready. This can reintroduce the lock-order inversion deadlock
\nthat commit 3393ff964e0f prevents.<\/p>\n
Add an smp_rmb() barrier to pair with the smp_wmb() in
\nfuse_chan_set_initialized() to prevent this.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
fuse: fix missing barrier when checking io-uring readiness<\/p>\n
fuse_block_alloc() reads fch->initialized and then fch->io_uring.
\nfch-><\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-17363","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/17363","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=17363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}