executor: arm64: add SYZOS_API_MSR

MSR is an ARM64 instruction that writes a value from a GP register to
one of the system CPU registers. Exposing those registers to a fuzzer will
let us trigger unexpected behavior in handling them on the kernel side.

The SYZOS_API_MSR call has two int64 arguments, register ID and value.
Register IDs are 64-bit values obtained from ARM64_SYS_REG() in the Linux asm/kvm.h
UAPI header. Same register IDs are used by ioctl$KVM_GET_ONE_REG and
ioctl$KVM_SET_ONE_REG.

Also add sys/linux/test/syz_kvm_setup_cpu_arm64-msr

0 files changed, 0 insertions, 0 deletions