honor no_quiet for missing llvm_mode output, also print to stderr with afl-*-rt.o.c instead of stdout for errors plus two potential bad free() fixes

1 files changed, 2 insertions, 2 deletions

diff --git a/gcc_plugin/afl-gcc-rt.o.c b/gcc_plugin/afl-gcc-rt.o.c
index 508d4441..77bb5325 100644
--- a/gcc_plugin/afl-gcc-rt.o.c
+++ b/gcc_plugin/afl-gcc-rt.o.c
@@ -94,7 +94,7 @@ static void __afl_map_shm(void) {
     shm_fd = shm_open(shm_file_path, O_RDWR, 0600);
     if (shm_fd == -1) {
 
-      printf("shm_open() failed\n");
+      fprintf(stderr, "shm_open() failed\n");
       exit(1);
 
     }
@@ -106,7 +106,7 @@ static void __afl_map_shm(void) {
       close(shm_fd);
       shm_fd = -1;
 
-      printf("mmap() failed\n");
+      fprintf(stderr, "mmap() failed\n");
       exit(2);
 
     }