add overrun check to SEE

3 years ago · 10dbb3b425
parent 6e045af565
commit 10dbb3b425
1 changed files with 6 additions and 0 deletions
--- a/src/fh_see.c
+++ b/src/fh_see.c
@ -15,6 +15,12 @@ static void show_word(struct fh_thread_s *fh, const struct fh_word_s *w)
      while (1) {
        // make sure it's aligned
        execptr = WORDALIGNED(execptr);
+        
+        if (execptr == 0 || execptr > fh->here) {
+          LOGE("Exec overrun without ENDWORD!");
+          break;
+        }
+        
        FHPRINT("0x%08x: ", execptr);
        const struct fh_instruction_s *instr = fh_instr_at(fh, execptr);
        if (!instr) {