1 files changed, 7 insertions, 0 deletions
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 41b0764..a850354 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -1891,6 +1891,13 @@ int kvm_arch_init_vcpu(CPUState *cs)
         env->xsave_buf_len = sizeof(struct kvm_xsave);
         env->xsave_buf = qemu_memalign(4096, env->xsave_buf_len);
         memset(env->xsave_buf, 0, env->xsave_buf_len);
+
+        /*
+         * The allocated storage must be large enough for all of the
+         * possible XSAVE state components.
+         */
+        assert(kvm_arch_get_supported_cpuid(kvm_state, 0xd, 0, R_ECX)
+               <= env->xsave_buf_len);
     }
 
     max_nested_state_len = kvm_max_nested_state_length();