In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published<\/p>\n
In qcom_scm_probe(), devm_request_threaded_irq() is called before
\nsmp_store_release(&__scm, scm). Two paths can dereference __scm before
\nit is published, both causing a NULL pointer dereference.<\/p>\n
The IRQ handler receives scm via its data argument but passes only wq_ctx
\nto qcom_scm_waitq_wakeup() and qcom_scm_get_completion(), which then
\ndereference __scm directly. Thread scm through both functions so the IRQ
\nhandler path never touches __scm.<\/p>\n
Non-atomic SMC calls made during probe (e.g. from qcom_tzmem_init via
\nqcom_scm_shm_bridge_enable) can return WAITQ_SLEEP, causing
\nqcom_scm_wait_for_wq_completion() to run before __scm is published and
\ndereference it. Add platform_set_drvdata(pdev, scm) early in probe and
\nchange qcom_scm_wait_for_wq_completion() to take the device pointer and
\nuse dev_get_drvdata() to reach scm, removing any dependency on __scm.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published<\/p>\n
In qcom_scm_probe(), devm_request_threaded_irq(<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25806","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25806","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=25806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}