various fixes

1 files changed, 30 insertions, 7 deletions

diff --git a/src/afl-common.c b/src/afl-common.c
index b0df1994..86226c9f 100644
--- a/src/afl-common.c
+++ b/src/afl-common.c
@@ -58,6 +58,25 @@ u8  last_intr = 0;
   #define AFL_PATH "/usr/local/lib/afl/"
 #endif
 
+void *afl_memmem(const void *haystack, size_t haystacklen, const void *needle,
+                 size_t needlelen) {
+
+  if (unlikely(needlelen > haystacklen)) { return NULL; }
+
+  for (u32 i = 0; i <= haystacklen - needlelen; ++i) {
+
+    if (unlikely(memcmp(haystack + i, needle, needlelen) == 0)) {
+
+      return (void *)(haystack + i);
+
+    }
+
+  }
+
+  return (void *)NULL;
+
+}
+
 void set_sanitizer_defaults() {
 
   /* Set sane defaults for ASAN if nothing else is specified. */
@@ -67,9 +86,9 @@ void set_sanitizer_defaults() {
   u8 *have_lsan_options = getenv("LSAN_OPTIONS");
   u8  have_san_options = 0;
   u8  default_options[1024] =
-      "detect_odr_violation=0:abort_on_error=1:symbolize=0:malloc_context_"
-      "size=0:allocator_may_return_null=1:handle_segv=0:handle_sigbus=0:"
-      "handle_abort=0:handle_sigfpe=0:handle_sigill=0:";
+      "detect_odr_violation=0:abort_on_error=1:symbolize=0:allocator_may_"
+      "return_null=1:handle_segv=0:handle_sigbus=0:handle_abort=0:handle_"
+      "sigfpe=0:handle_sigill=0:";
 
   if (have_asan_options || have_ubsan_options || have_msan_options ||
       have_lsan_options) {
@@ -84,14 +103,18 @@ void set_sanitizer_defaults() {
 
     u8 buf[2048] = "";
     if (!have_san_options) { strcpy(buf, default_options); }
-    strcat(buf, "exitcode=" STRINGIFY(LSAN_ERROR) ":fast_unwind_on_malloc=0:print_suppressions=0:detect_leaks=1:");
+    strcat(buf, "exitcode=" STRINGIFY(LSAN_ERROR) ":fast_unwind_on_malloc=0:print_suppressions=0:detect_leaks=1:malloc_context_size=30:");
     setenv("LSAN_OPTIONS", buf, 1);
 
   }
 
   /* for everything not LSAN we disable detect_leaks */
 
-  if (!have_lsan_options) { strcat(default_options, "detect_leaks=0:"); }
+  if (!have_lsan_options) {
+
+    strcat(default_options, "detect_leaks=0:malloc_context_size=0:");
+
+  }
 
   /* Set sane defaults for ASAN if nothing else is specified. */
 
@@ -130,7 +153,7 @@ u32 check_binary_signatures(u8 *fn) {
   if (f_data == MAP_FAILED) { PFATAL("Unable to mmap file '%s'", fn); }
   close(fd);
 
-  if (memmem(f_data, f_len, PERSIST_SIG, strlen(PERSIST_SIG) + 1)) {
+  if (afl_memmem(f_data, f_len, PERSIST_SIG, strlen(PERSIST_SIG) + 1)) {
 
     if (!be_quiet) { OKF(cPIN "Persistent mode binary detected."); }
     setenv(PERSIST_ENV_VAR, "1", 1);
@@ -155,7 +178,7 @@ u32 check_binary_signatures(u8 *fn) {
 
   }
 
-  if (memmem(f_data, f_len, DEFER_SIG, strlen(DEFER_SIG) + 1)) {
+  if (afl_memmem(f_data, f_len, DEFER_SIG, strlen(DEFER_SIG) + 1)) {
 
     if (!be_quiet) { OKF(cPIN "Deferred forkserver binary detected."); }
     setenv(DEFER_ENV_VAR, "1", 1);