In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
usb: gadget: aspeed-vhub: cancel wake work on device removal<\/p>\n
wake_work is armed from the gadget .wakeup callback to resume suspended
\ndownstream ports, and it is never cancelled in ast_vhub_remove(), so a
\nwork item queued before or during removal can run after devm has freed
\nvhub and its ports, a use-after-free.<\/p>\n
Cancelling the work alone is not sufficient: usb_gadget_wakeup() takes
\nno lock and the unbind path never clears wakeup_en, so a remote-wakeup
\nrequest in flight on another CPU can re-arm the work after the cancel
\nand before vhub is freed.<\/p>\n
ast_vhub_del_dev() already clears d->registered under vhub->lock before
\nunregistering the gadget. Refuse the wakeup in ast_vhub_udc_wakeup()
\nonce d->registered is clear: the check and the schedule_work() are then
\natomic against the unbind, so a wakeup that passed before the flag was
\ncleared is drained by the cancel_work_sync() after the del_dev loop,
\nand one that arrives later returns without arming. Also move INIT_WORK()
\nto the top of ast_vhub_probe(), since the probe error path reuses
\nast_vhub_remove() and would otherwise cancel a never-initialized work
\nitem.<\/p>\n
This issue was found by an in-house static analysis tool.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
usb: gadget: aspeed-vhub: cancel wake work on device removal<\/p>\n
wake_work is armed from the gadget .wakeup callback to resume suspend<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41238","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41238","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=41238"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41238"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}