In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
virtio-fs: avoid double-free on failed queue setup<\/p>\n
virtio_fs_setup_vqs() allocates fs->vqs and fs->mq_map before calling
\nvirtio_find_vqs(). If virtio_find_vqs() fails, the error path frees both
\npointers and returns an error to virtio_fs_probe().<\/p>\n
virtio_fs_probe() then drops the last kobject reference, and
\nvirtio_fs_ktype_release() frees fs->vqs and fs->mq_map again. This leaves
\ndangling pointers in struct virtio_fs and can trigger a double-free during
\nprobe failure cleanup.<\/p>\n
Set fs->vqs and fs->mq_map to NULL immediately after kfree() in the
\nvirtio_fs_setup_vqs() error path so that the later kobject release sees an
\nuninitialized state and kfree(NULL) becomes harmless.<\/p>\n
This can be reproduced when a broken virtio-fs device advertises more
\nrequest queues than the transport actually provides. In that case
\nvirtio_find_vqs() fails while setting up the extra queue, and the probe
\npath reaches the double-free cleanup sequence.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
virtio-fs: avoid double-free on failed queue setup<\/p>\n
virtio_fs_setup_vqs() allocates fs->vqs and fs->mq_map before calling
\nvirtio_fi<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28642","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28642","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=28642"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28642"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}