Adding null check to avoid abort when invalid IL is encountered (#57522)

When a callvirt instruction is encountered on a static method, there is a hard abort/crash. This commit avoids the problem.
dotnet · Aug 19, 2021 · 1ea615c · 1ea615c
1 parent d367827
commit 1ea615c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/mono/mono/mini/method-to-ir.c b/src/mono/mono/mini/method-to-ir.c
@@ -7314,7 +7314,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
 
 			sp -= n;
 
-			if (virtual_ && cmethod && sp [0]->opcode == OP_TYPED_OBJREF) {
+			if (virtual_ && cmethod && sp [0] && sp [0]->opcode == OP_TYPED_OBJREF) {
 				ERROR_DECL (error);
 
 				MonoMethod *new_cmethod = mono_class_get_virtual_method (sp [0]->klass, cmethod, error);