diff options
| author | Maxim Levitsky <[email protected]> | 2021-07-15 01:56:24 +0300 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2021-08-16 09:48:27 -0400 |
| commit | 0f923e07124df069ba68d8bb12324398f4b6b709 (patch) | |
| tree | e2fb5efdcf2bb619c2bd3cd6b04463bf6644a1c0 /lib/test_overflow.c | |
| parent | 6e949ddb0a6337817330c897e29ca4177c646f02 (diff) | |
KVM: nSVM: avoid picking up unsupported bits from L2 in int_ctl (CVE-2021-3653)
* Invert the mask of bits that we pick from L2 in
nested_vmcb02_prepare_control
* Invert and explicitly use VIRQ related bits bitmask in svm_clear_vintr
This fixes a security issue that allowed a malicious L1 to run L2 with
AVIC enabled, which allowed the L2 to exploit the uninitialized and enabled
AVIC to read/write the host physical memory at some offsets.
Fixes: 3d6368ef580a ("KVM: SVM: Add VMRUN handler")
Signed-off-by: Maxim Levitsky <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'lib/test_overflow.c')
0 files changed, 0 insertions, 0 deletions