diff options
| author | Alexander Potapenko <glider@google.com> | 2026-01-30 14:50:32 +0100 |
|---|---|---|
| committer | Alexander Potapenko <glider@google.com> | 2026-02-09 09:43:36 +0000 |
| commit | 993198b3dea8fdf032e5ff4f0914b203e0f3b67d (patch) | |
| tree | 8652fb8d1619d92d58ffc88e66f40738c234e782 /sys/linux/test | |
| parent | eababac62cc8b2dbcdadba991eecaa4fd521c42d (diff) | |
sys/linux/test: add test for nested SYZOS resumption
Add sys/linux/test/amd64-syz_kvm_nested_load_syzos-vmresume to verify the
state preservation and resumption capabilities of the
SYZOS_API_NESTED_LOAD_SYZOS primitive.
The test deploys an L2 guest with a sequential multi-step payload:
1. `uexit(1)`
2. `uexit(2)`
The L1 hypervisor first executes `nested_vmlaunch`, causing L2 to run
until the first uexit. L1 then executes `nested_vmresume` to continue
L2 execution.
Diffstat (limited to 'sys/linux/test')
| -rw-r--r-- | sys/linux/test/amd64-syz_kvm_nested_load_syzos-vmresume | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sys/linux/test/amd64-syz_kvm_nested_load_syzos-vmresume b/sys/linux/test/amd64-syz_kvm_nested_load_syzos-vmresume new file mode 100644 index 000000000..3147476d5 --- /dev/null +++ b/sys/linux/test/amd64-syz_kvm_nested_load_syzos-vmresume @@ -0,0 +1,26 @@ +# +# requires: arch=amd64 -threaded +# +r0 = openat$kvm(0, &AUTO='/dev/kvm\x00', 0x0, 0x0) +r1 = ioctl$KVM_CREATE_VM(r0, AUTO, 0x0) +r2 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil) + +# L2 payload: uexit(1), uexit(2) +# L1 logic: launch (runs 1st uexit), resume (runs 2nd uexit) +# +r3 = syz_kvm_add_vcpu$x86(r2, &AUTO={0x0, &AUTO=[@enable_nested={AUTO, AUTO, 0x0}, @nested_create_vm={AUTO, AUTO, 0x0}, @nested_load_syzos={AUTO, AUTO, {0x0, 0x10, [@uexit={AUTO, AUTO, 0x1}, @uexit={AUTO, AUTO, 0x2}]}}, @nested_vmlaunch={AUTO, AUTO, 0x0}, @nested_vmresume={AUTO, AUTO, 0x0}], AUTO}) +r4 = ioctl$KVM_GET_VCPU_MMAP_SIZE(r0, AUTO) +r5 = mmap$KVM_VCPU(&(0x7f0000009000/0x1000)=nil, r4, 0x3, 0x1, r3, 0x0) + +# L2 Exit 1 +# +ioctl$KVM_RUN(r3, AUTO, 0x0) +syz_kvm_assert_syzos_uexit$x86(r3, r5, 0x0100000000000001) + +# L2 Exit 2 (via VMRESUME) +# +ioctl$KVM_RUN(r3, AUTO, 0x0) +syz_kvm_assert_syzos_uexit$x86(r3, r5, 0x0100000000000002) + +ioctl$KVM_RUN(r3, AUTO, 0x0) +syz_kvm_assert_syzos_uexit$x86(r3, r5, 0xffffffffffffffff) |