Don't allow MAP_FIXED_NOREPLACE mappings to be randomized in chaos mode.

Fixes #3669
rr-debugger · Dec 20, 2023 · a351573 · a351573
1 parent 825f098
commit a351573
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/record_syscall.cc b/src/record_syscall.cc
@@ -3269,7 +3269,7 @@ static void prepare_mmap_register_params(RecordTask* t) {
     }
   }
 
-  intptr_t mask_flag = MAP_FIXED;
+  intptr_t mask_flag = MAP_FIXED | MAP_FIXED_NOREPLACE;
 #ifdef MAP_32BIT
   mask_flag |= MAP_32BIT;
 #endif