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-rw-r--r--src/afl-common.c22
-rw-r--r--src/afl-fuzz-init.c10
-rw-r--r--src/afl-fuzz-state.c8
-rw-r--r--src/afl-fuzz.c24
4 files changed, 22 insertions, 42 deletions
diff --git a/src/afl-common.c b/src/afl-common.c
index e684302a..7c074acc 100644
--- a/src/afl-common.c
+++ b/src/afl-common.c
@@ -63,8 +63,7 @@ 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) ||
-      getenv(PERSIST_ENV_VAR)) {
+  if (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);
@@ -72,11 +71,9 @@ u32 check_binary_signatures(u8 *fn) {
 
   } else if (getenv("AFL_PERSISTENT")) {
 
-    if (!be_quiet) {
-
-      WARNF("AFL_PERSISTENT is no longer supported and may misbehave!");
-
-    }
+    if (!be_quiet) { OKF(cPIN "Persistent mode enforced."); }
+    setenv(PERSIST_ENV_VAR, "1", 1);
+    ret = 1;
 
   } else if (getenv("AFL_FRIDA_PERSISTENT_ADDR")) {
 
@@ -91,8 +88,7 @@ u32 check_binary_signatures(u8 *fn) {
 
   }
 
-  if (memmem(f_data, f_len, DEFER_SIG, strlen(DEFER_SIG) + 1) ||
-      getenv(DEFER_ENV_VAR)) {
+  if (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);
@@ -100,11 +96,9 @@ u32 check_binary_signatures(u8 *fn) {
 
   } else if (getenv("AFL_DEFER_FORKSRV")) {
 
-    if (!be_quiet) {
-
-      WARNF("AFL_DEFER_FORKSRV is no longer supported and may misbehave!");
-
-    }
+    if (!be_quiet) { OKF(cPIN "Deferred forkserver enforced."); }
+    setenv(DEFER_ENV_VAR, "1", 1);
+    ret += 2;
 
   }
 
diff --git a/src/afl-fuzz-init.c b/src/afl-fuzz-init.c
index 45f28d4b..05a654c8 100644
--- a/src/afl-fuzz-init.c
+++ b/src/afl-fuzz-init.c
@@ -2822,7 +2822,11 @@ void check_binary(afl_state_t *afl, u8 *fname) {
 
   } else if (getenv("AFL_PERSISTENT")) {
 
-    WARNF("AFL_PERSISTENT is no longer supported and may misbehave!");
+    OKF(cPIN "Persistent mode enforced.");
+    setenv(PERSIST_ENV_VAR, "1", 1);
+    afl->persistent_mode = 1;
+    afl->fsrv.persistent_mode = 1;
+    afl->shmem_testcase_mode = 1;
 
   } else if (getenv("AFL_FRIDA_PERSISTENT_ADDR")) {
 
@@ -2843,7 +2847,9 @@ void check_binary(afl_state_t *afl, u8 *fname) {
 
   } else if (getenv("AFL_DEFER_FORKSRV")) {
 
-    WARNF("AFL_DEFER_FORKSRV is no longer supported and may misbehave!");
+    OKF(cPIN "Deferred forkserver enforced.");
+    setenv(DEFER_ENV_VAR, "1", 1);
+    afl->deferred_mode = 1;
 
   }
 
diff --git a/src/afl-fuzz-state.c b/src/afl-fuzz-state.c
index 115e62de..129e4c8b 100644
--- a/src/afl-fuzz-state.c
+++ b/src/afl-fuzz-state.c
@@ -486,15 +486,15 @@ void read_afl_environment(afl_state_t *afl, char **envp) {
 
                               afl_environment_variable_len)) {
 
-            afl->min_length = atoi(
-                (u8 *)get_afl_env(afl_environment_variables[i]));
+            afl->min_length =
+                atoi((u8 *)get_afl_env(afl_environment_variables[i]));
 
           } else if (!strncmp(env, "AFL_INPUT_LEN_MAX",
 
                               afl_environment_variable_len)) {
 
-            afl->max_length = atoi(
-                (u8 *)get_afl_env(afl_environment_variables[i]));
+            afl->max_length =
+                atoi((u8 *)get_afl_env(afl_environment_variables[i]));
 
           }
 
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index 7e3b3c94..c923cc9d 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -294,8 +294,8 @@ static void usage(u8 *argv0, int more_help) {
       "                        'signalfx' and 'influxdb'\n"
       "AFL_TESTCACHE_SIZE: use a cache for testcases, improves performance (in MB)\n"
       "AFL_TMPDIR: directory to use for input file generation (ramdisk recommended)\n"
-      //"AFL_PERSISTENT: not supported anymore -> no effect, just a warning\n"
-      //"AFL_DEFER_FORKSRV: not supported anymore -> no effect, just a warning\n"
+      "AFL_PERSISTENT: enforce persistent mode (if __AFL_LOOP is in a shared lib\n"
+      "AFL_DEFER_FORKSRV: enforced deferred forkserver (__AFL_INIT is in a .so\n"
       "\n"
     );
 
@@ -1920,26 +1920,6 @@ int main(int argc, char **argv_orig, char **envp) {
 
   check_binary(afl, argv[optind]);
 
-  if (getenv(PERSIST_ENV_VAR) && !afl->persistent_mode) {
-
-    WARNF(
-        "Persistent mode environment variable detected, forcing persistent "
-        "mode!");
-    afl->persistent_mode = 1;
-    afl->fsrv.persistent_mode = 1;
-    afl->shmem_testcase_mode = 1;
-
-  }
-
-  if (getenv(DEFER_ENV_VAR) && !afl->deferred_mode) {
-
-    WARNF(
-        "Deferred forkserver mode environment variable detected, forcing "
-        "deferred forkserver!");
-    afl->deferred_mode = 1;
-
-  }
-
   #ifdef AFL_PERSISTENT_RECORD
   if (unlikely(afl->fsrv.persistent_record)) {