Ashish Kalra bbdcc644b5 KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak ... commit d22d2474e3 upstream. For some sev ioctl interfaces, the length parameter that is passed maybe less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the allocated buffer, these sev ioctl interface may return uninitialized kernel slab memory. Reported-by: Andy Nguyen <theflow@google.com> Suggested-by: David Rientjes <rientjes@google.com> Suggested-by: Peter Gonda <pgonda@google.com> Cc: kvm@vger.kernel.org Cc: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org Fixes: eaf78265a4 ("KVM: SVM: Move SEV code to separate file") Fixes: 2c07ded064 ("KVM: SVM: add support for SEV attestation command") Fixes: 4cfdd47d6d ("KVM: SVM: Add KVM_SEV SEND_START command") Fixes: d3d1af85e2 ("KVM: SVM: Add KVM_SEND_UPDATE_DATA command") Fixes: eba04b20e4 ("KVM: x86: Account a variety of miscellaneous allocations") Signed-off-by: Ashish Kalra <ashish.kalra@amd.com> Reviewed-by: Peter Gonda <pgonda@google.com> Message-Id: <20220516154310.3685678-1-Ashish.Kalra@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-06-06 08:47:53 +02:00
..
avic.c	KVM: SVM: fix panic on out-of-bounds guest IRQ	2022-04-08 13:58:52 +02:00
nested.c	KVM: x86: Drop WARNs that assert a triple fault never "escapes" from L2	2022-06-06 08:47:53 +02:00
pmu.c	KVM: x86/svm: Account for family 17h event renumberings in amd_pmc_perf_hw_id	2022-05-12 12:32:17 +02:00
sev.c	KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak	2022-06-06 08:47:53 +02:00
svm.c	KVM: x86: nSVM: disallow userspace setting of MSR_AMD64_TSC_RATIO to non default value when tsc scaling disabled	2022-02-24 13:04:47 -05:00
svm.h	KVM: SVM: Fix kvm_cache_regs.h inclusions for is_guest_mode()	2022-04-13 19:27:07 +02:00
svm_onhyperv.c	KVM: SVM: Fix kvm_cache_regs.h inclusions for is_guest_mode()	2022-04-13 19:27:07 +02:00
svm_onhyperv.h	KVM: SVM: drop unnecessary code in svm_hv_vmcb_dirty_nested_enlightenments()	2022-01-26 12:15:03 -05:00
svm_ops.h	x86/kvm: Always inline vmload() / vmsave()	2021-09-15 15:51:45 +02:00
vmenter.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00