Sean Christopherson 179c6c27bf KVM: SVM: Fix off-by-one indexing when nullifying last used SEV VMCB ... Use the raw ASID, not ASID-1, when nullifying the last used VMCB when freeing an SEV ASID. The consumer, pre_sev_run(), indexes the array by the raw ASID, thus KVM could get a false negative when checking for a different VMCB if KVM manages to reallocate the same ASID+VMCB combo for a new VM. Note, this cannot cause a functional issue _in the current code_, as pre_sev_run() also checks which pCPU last did VMRUN for the vCPU, and last_vmentry_cpu is initialized to -1 during vCPU creation, i.e. is guaranteed to mismatch on the first VMRUN. However, prior to commit 8a14fe4f0c ("kvm: x86: Move last_cpu into kvm_vcpu_arch as last_vmentry_cpu"), SVM tracked pCPU on its own and zero-initialized the last_cpu variable. Thus it's theoretically possible that older versions of KVM could miss a TLB flush if the first VMRUN is on pCPU0 and the ASID and VMCB exactly match those of a prior VM. Fixes: 70cd94e60c ("KVM: SVM: VMRUN should use associated ASID when SEV is enabled") Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2021-08-04 06:02:09 -04:00
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boot
configs
crypto
entry	arch, mm: wire up memfd_secret system call where relevant	2021-07-08 11:48:21 -07:00
events	A fix and a hardware-enablement addition:	2021-07-11 11:10:48 -07:00
hyperv
ia32
include	Merge tag 'kvm-s390-master-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD	2021-07-14 12:14:27 -04:00
kernel	Merge tag 'kvm-s390-master-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD	2021-07-14 12:14:27 -04:00
kvm	KVM: SVM: Fix off-by-one indexing when nullifying last used SEV VMCB	2021-08-04 06:02:09 -04:00
lib
math-emu
mm	mm: rename p4d_page_vaddr to p4d_pgtable and make it return pud_t *	2021-07-08 11:48:22 -07:00
net	bpf: Track subprog poke descriptors correctly and fix use-after-free	2021-07-09 12:08:27 +02:00
pci	pci-v5.14-changes	2021-07-08 12:06:20 -07:00
platform
power
purgatory	kernel.h: split out panic and oops helpers	2021-07-01 11:06:04 -07:00
ras
realmode
tools
um
video
xen	kernel.h: split out panic and oops helpers	2021-07-01 11:06:04 -07:00
.gitignore
Kbuild
Kconfig	Merge branch 'akpm' (patches from Andrew)	2021-07-02 12:08:10 -07:00
Kconfig.assembler
Kconfig.cpu
Kconfig.debug
Makefile	Kbuild updates for v5.14	2021-07-10 11:01:38 -07:00
Makefile.um
Makefile_32.cpu