In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
amt: fix use-after-free in AMT delayed works<\/p>\n
When an AMT device is removed, pending delayed works can still access
\nthe freed amt_dev structure, which may result in kernel crashes or
\nmemory corruption.<\/p>\n
amt_dev_stop() cancels req_wq and discovery_wq with
\ncancel_delayed_work_sync(), but these works can be scheduled again
\nfrom event_wq after the cancellation. This allows delayed works to
\naccess the freed amt_dev structure after the netdev has been released.<\/p>\n
The following is a simple race scenario:<\/p>\n
CPU0 CPU1<\/p>\n
amt_dev_stop()
\ncancel_delayed_work_sync()
\n amt_event_work()
\n mod_delayed_work(req_wq)
\nfree netdev
\n req_wq accesses freed amt_dev<\/p>\n
Use disable_delayed_work_sync() in amt_dev_stop() to prevent req_wq and
\ndiscovery_wq from being queued again and wait for running work items
\nto complete.<\/p>\n
The delayed works are disabled after initialization in
\namt_newlink() and enabled only when the device is successfully opened.
\nThis keeps the delayed work lifecycle synchronized with the lifetime
\nof the AMT device.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
amt: fix use-after-free in AMT delayed works<\/p>\n
When an AMT device is removed, pending delayed works can still access
\nthe freed amt_d<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5356","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5356","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=5356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5356"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}