Fix segfault if help option is use without test specification.

Global default test option is -1, so the code reads memory outside of the array.
mbroz · Aug 5, 2022 · 7d60208 · 7d60208
1 parent 789c28e
commit 7d60208
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/dieharder/help.c b/dieharder/help.c
@@ -32,7 +32,7 @@ void help()
 
  /* printf("OK, what is dtest_num = %u\n",dtest_num);*/
 
- if(dh_test_types[dtest_num]){
+ if(dtest_num>=0 && dtest_num < MAXTESTS && dh_test_types[dtest_num]){
    fprintf(stdout,"%s",dh_test_types[dtest_num]->description);
    Exit(0);
  } else {