In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs<\/p>\n
Ignore KVM’s internal “service pending PV EOI” request if the vCPU has
\ndisabled PV EOIs since the request was made. Asserting that PV EOIs are
\nenabled can fail if reading guest memory in pv_eoi_get_user() fails, i.e.
\nif pv_eoi_test_and_clr_pending() bails early, *and* the vCPU also disables
\nPV EOIs.<\/p>\n
kernel BUG at arch\/x86\/kvm\/lapic.c:3338!
\n Oops: invalid opcode: 0000 [#1] SMP
\n CPU: 4 UID: 1000 PID: 890 Comm: pv_eoi_test Not tainted 7.0.0-d585aa5894d8-vm #337 PREEMPT
\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02\/06\/2015
\n RIP: 0010:kvm_lapic_sync_from_vapic+0x12b\/0x140 [kvm]
\n Call Trace:<\/p>\n
kvm_arch_vcpu_ioctl_run+0x1075\/0x1c30 [kvm]
\n kvm_vcpu_ioctl+0x2d5\/0x980 [kvm]
\n __x64_sys_ioctl+0x8a\/0xd0
\n do_syscall_64+0xb5\/0xb40
\n entry_SYSCALL_64_after_hwframe+0x4b\/0x53<\/p>\n
Modules linked in: kvm_intel kvm irqbypass
\n —[ end trace 0000000000000000 ]—<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs<\/p>\n
Ignore KVM’s internal “service pending PV EOI” request if t<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-6899","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/6899","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=6899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}