In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
power: supply: rt9455: Fix use-after-free in power_supply_changed()<\/p>\n
Using the `devm_` variant for requesting IRQ _before_ the `devm_`
\nvariant for allocating\/registering the `power_supply` handle, means that
\nthe `power_supply` handle will be deallocated\/unregistered _before_ the
\ninterrupt handler (since `devm_` naturally deallocates in reverse
\nallocation order). This means that during removal, there is a race
\ncondition where an interrupt can fire just _after_ the `power_supply`
\nhandle has been freed, *but* just _before_ the corresponding
\nunregistration of the IRQ handler has run.<\/p>\n
This will lead to the IRQ handler calling `power_supply_changed()` with
\na freed `power_supply` handle. Which usually crashes the system or
\notherwise silently corrupts the memory…<\/p>\n
Note that there is a similar situation which can also happen during
\n`probe()`; the possibility of an interrupt firing _before_ registering
\nthe `power_supply` handle. This would then lead to the nasty situation
\nof using the `power_supply` handle *uninitialized* in
\n`power_supply_changed()`.<\/p>\n
Fix this racy use-after-free by making sure the IRQ is requested _after_
\nthe registration of the `power_supply` handle.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
power: supply: rt9455: Fix use-after-free in power_supply_changed()<\/p>\n
Using the `devm_` variant for requesting IRQ _before_ the `dev<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-15477","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/15477","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=15477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}