diff options
| author | Alexander Potapenko <glider@google.com> | 2025-09-18 10:10:35 +0200 |
|---|---|---|
| committer | Alexander Potapenko <glider@google.com> | 2025-09-19 08:38:14 +0000 |
| commit | f04374a738f6693569f7e0c4ddb765081f433a0e (patch) | |
| tree | c5c853ee31ac676a8ae87d490a5d243a940d0a8f /sys/linux | |
| parent | ecab01f19835ae5984daf74b219e32cf85b053c8 (diff) | |
sys/linux/test: add tests for SYZOS_API_WR_DRN
Diffstat (limited to 'sys/linux')
| -rw-r--r-- | sys/linux/test/amd64-syz_kvm_setup_syzos_vm-wr_drn | 22 | ||||
| -rw-r--r-- | sys/linux/test/amd64-syz_kvm_setup_syzos_vm-wr_drn-shutdown | 22 |
2 files changed, 44 insertions, 0 deletions
diff --git a/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-wr_drn b/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-wr_drn new file mode 100644 index 000000000..106822d63 --- /dev/null +++ b/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-wr_drn @@ -0,0 +1,22 @@ +# +# 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$x86(r1, &(0x7f0000c00000/0x400000)=nil) + +# Writing to debug register DR7 will trigger an exit. +# +r3 = syz_kvm_add_vcpu$x86(r2, &AUTO={0x0, &AUTO=[@wr_drn={AUTO, AUTO, {0x7, 0x2000}}], AUTO}) + +# 0x3 = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP +# +ioctl$KVM_SET_GUEST_DEBUG_x86(r3, AUTO, &AUTO={0x3, 0x0, {[0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]}}) +r4 = ioctl$KVM_GET_VCPU_MMAP_SIZE(r0, AUTO) +r5 = mmap$KVM_VCPU(&(0x7f0000009000/0x1000)=nil, r4, 0x3, 0x1, r3, 0x0) + +ioctl$KVM_RUN(r3, AUTO, 0x0) + +# Ensure that exit reason is KVM_EXIT_DEBUG. +# +syz_kvm_assert_syzos_kvm_exit$x86(r5, 0x4) diff --git a/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-wr_drn-shutdown b/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-wr_drn-shutdown new file mode 100644 index 000000000..ef85a54ff --- /dev/null +++ b/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-wr_drn-shutdown @@ -0,0 +1,22 @@ +# +# requires: arch=amd64 -threaded +# +r0 = openat$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) + +# DR7.GD=1 causes further attempts to touch a debug register to result in a debug exception. +# +r3 = syz_kvm_add_vcpu$x86(r2, &AUTO={0x0, &AUTO=[@wr_drn={AUTO, AUTO, {0x7, 0x2000}}, @wr_drn={AUTO, AUTO, {0x0, 0x1}}], AUTO}) + +# 0x10001 = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP enables software breakpoints. +# +ioctl$KVM_SET_GUEST_DEBUG_x86(r3, AUTO, &AUTO={0x10001, 0x0, {[0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]}}) +r4 = ioctl$KVM_GET_VCPU_MMAP_SIZE(r0, AUTO) +r5 = mmap$KVM_VCPU(&(0x7f0000009000/0x1000)=nil, r4, 0x3, 0x1, r3, 0x0) + +ioctl$KVM_RUN(r3, AUTO, 0x0) + +# Ensure that exit reason is KVM_EXIT_SHUTDOWN, because the exception is unhandled. +# +syz_kvm_assert_syzos_kvm_exit$x86(r5, 0x8) |