In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
sched_ext: Abort directly from the hardlockup handler<\/p>\n
scx_hardlockup() defers the abort to an irq_work because exit claiming used
\nto take scx_sched_lock and couldn’t run from NMI. The deferral is now
\nunnecessary – claiming is NMI-safe and asserting ->aborting is exactly what
\nbreaks the live-locks that hard-lock CPUs. Call handle_lockup() directly and
\ndrop the irq_work. This also makes the self-detected case recoverable: the
\nperf watchdog fires on the hard-locked CPU itself, where a queued irq_work
\nnever runs with IRQs off.<\/p>\n
Also fix the return value: %true used to be returned whenever sched_ext was
\nloaded, suppressing the kernel’s hardlockup report even when the abort was
\nrefused. Return %true only when this call initiated the abort.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
sched_ext: Abort directly from the hardlockup handler<\/p>\n
scx_hardlockup() defers the abort to an irq_work because exit claiming used<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25841","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25841","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=25841"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25841"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}