1 files changed, 3 insertions, 3 deletions
diff --git a/instrumentation/afl-compiler-rt.o.c b/instrumentation/afl-compiler-rt.o.c
index dd9aae77..85ee9f71 100644
--- a/instrumentation/afl-compiler-rt.o.c
+++ b/instrumentation/afl-compiler-rt.o.c
@@ -666,8 +666,8 @@ static void __afl_map_shm(void) {
   }
 
   if (id_str) {
-
-    if ((__afl_dummy_fd[1] = open("/dev/null", O_WRONLY)) < 0) {
+    // /dev/null doesn't work so we use /dev/urandom
+    if ((__afl_dummy_fd[1] = open("/dev/urandom", O_WRONLY)) < 0) {
 
       if (pipe(__afl_dummy_fd) < 0) { __afl_dummy_fd[1] = 1; }
 
@@ -2294,7 +2294,7 @@ void __cmplog_rtn_hook_strn(u8 *ptr1, u8 *ptr2, u64 len) {
   int len1 = strnlen(ptr1, len0);
   if (len1 < 31) len1 = area_is_valid(ptr1, len1 + 1);
   int len2 = strnlen(ptr2, len0);
-  if (len2 < 31) len2 = area_is_valid(ptr1, len2 + 1);
+  if (len2 < 31) len2 = area_is_valid(ptr2, len2 + 1);
   int l = MAX(len1, len2);
   if (l < 2) return;