executor: sys/linux/: pkg/runtest: pkg/vminfo: add syz_kvm_assert_syzos_kvm_exit

Implement a pseudo-syscall to check the value of kvm_run.exit_reason

1 files changed, 25 insertions, 0 deletions

diff --git a/executor/common_kvm.h b/executor/common_kvm.h
new file mode 100644
index 000000000..fecd00922
--- /dev/null
+++ b/executor/common_kvm.h
@@ -0,0 +1,25 @@
+// Copyright 2025 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+// This file is shared between executor and csource package.
+
+// Common KVM-related definitions.
+
+#if SYZ_EXECUTOR || __NR_syz_kvm_assert_syzos_kvm_exit
+static long syz_kvm_assert_syzos_kvm_exit(volatile long a0, volatile long a1)
+{
+	struct kvm_run* run = (struct kvm_run*)a0;
+	uint64 expect = a1;
+
+	if (!run) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (run->exit_reason != expect) {
+		errno = EDOM;
+		return -1;
+	}
+	return 0;
+}
+#endif