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-rw-r--r--instrumentation/afl-compiler-rt.o.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/instrumentation/afl-compiler-rt.o.c b/instrumentation/afl-compiler-rt.o.c
index 5d198ada..cc73e5ec 100644
--- a/instrumentation/afl-compiler-rt.o.c
+++ b/instrumentation/afl-compiler-rt.o.c
@@ -275,6 +275,8 @@ static void __afl_map_shm(void) {
 
   char *id_str = getenv(SHM_ENV_VAR);
 
+  if (__afl_final_loc) { ++__afl_final_loc; }  // as we count starting 0
+
   if (__afl_final_loc) {
 
     __afl_map_size = __afl_final_loc;