In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
spi: davinci: switch to managed controller allocation<\/p>\n
The controller is allocated with the non-managed spi_alloc_host() while
\nthe interrupt is registered with devm_request_threaded_irq(). During
\nremoval, spi_bitbang_stop() only unregisters the controller; the
\nsubsequent spi_controller_put() then frees the controller together with
\nits embedded davinci_spi devdata, which is the IRQ handler’s dev_id.
\nThe devm_request_threaded_irq() release action (free_irq()), which
\ndrains the handler, does not run until after .remove() returns. A late
\nor latched interrupt can therefore reach davinci_spi_irq() and
\ndereference already-freed memory.<\/p>\n
Switch to devm_spi_alloc_host() so that the devres LIFO order releases
\nthe controller only after free_irq() has drained the handler, and drop
\nthe now-redundant spi_controller_put() from .remove(). The probe error
\npath is simplified to direct returns.<\/p>\n
The clock is acquired with devm_clk_get_enabled(), which is registered
\nafter the IRQ and thus released before it by the devres LIFO order.
\nDrain the interrupt explicitly with devm_free_irq() before disabling the
\ncontroller so that a late interrupt cannot access the registers of a
\nclock-gated controller.<\/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
spi: davinci: switch to managed controller allocation<\/p>\n
The controller is allocated with the non-managed spi_alloc_host() while
\nthe <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25819","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25819","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=25819"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25819"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25819"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}