11530 badseg test creates cores

*** 8,25 ****
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2018 Joyent, Inc.
   */
  
  #include <stdlib.h>
  #include <ucontext.h>
  #include <sys/wait.h>
  #include <unistd.h>
  #include <sys/regset.h>
  
  /*
   * Load a bunch of bad selectors into the seg regs: this will typically cause
   * the child process to core dump, but it shouldn't panic the kernel...
   *
--- 8,27 ----
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2019 Joyent, Inc.
   */
  
  #include <stdlib.h>
  #include <ucontext.h>
  #include <sys/wait.h>
  #include <unistd.h>
  #include <sys/regset.h>
+ #include <sys/resource.h>
+ #include <err.h>
  
  /*
   * Load a bunch of bad selectors into the seg regs: this will typically cause
   * the child process to core dump, but it shouldn't panic the kernel...
   *
*** 115,127 ****
          pid_t pid;
  
          switch ((pid = fork())) {
          case 0:
                  func();
!                 exit(0);
          case -1:
!                 exit(1);
          default:
                  (void) waitpid(pid, NULL, 0);
                  return;
          }
  
--- 117,129 ----
          pid_t pid;
  
          switch ((pid = fork())) {
          case 0:
                  func();
!                 exit(EXIT_SUCCESS);
          case -1:
!                 exit(EXIT_FAILURE);
          default:
                  (void) waitpid(pid, NULL, 0);
                  return;
          }
  
*** 128,137 ****
--- 130,145 ----
  }
  
  int
  main(int argc, char *argv[])
  {
+         struct rlimit rl = { 0, };
+ 
+         if (setrlimit(RLIMIT_CORE, &rl) != 0) {
+                 err(EXIT_FAILURE, "failed to disable cores");
+         }
+ 
          for (selector = 0; selector < 8194; selector++) {
                  inchild(resetcs);
                  inchild(resetds);
                  inchild(resetes);
                  inchild(resetfs);
*** 142,148 ****
                  inchild(badfs);
                  inchild(badgs);
                  inchild(badss);
          }
  
!         exit(0);
  }
--- 150,156 ----
                  inchild(badfs);
                  inchild(badgs);
                  inchild(badss);
          }
  
!         exit(EXIT_SUCCESS);
  }