diff --git a/src/modules/module_07500.c b/src/modules/module_07500.c
index e460352e0..c7c85e1bd 100644
--- a/src/modules/module_07500.c
+++ b/src/modules/module_07500.c
@@ -74,26 +74,25 @@ u32 module_kernel_threads_max (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYB
   return kernel_threads_max;
 }
 
-bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
+char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
-  if (device_param->opencl_platform_vendor_id == VENDOR_ID_APPLE)
+  char *jit_build_options = NULL;
+
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the RC4_KEY with 64 threads requires (256 + 4) 16640.
+
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
   {
-    // self-test failed
-    if ((device_param->opencl_device_vendor_id == VENDOR_ID_INTEL_SDK) && (device_param->opencl_device_type & CL_DEVICE_TYPE_GPU))
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
     {
-      return true;
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
     }
   }
 
-  // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619955152/test_report.log:! unhandled return code 139, cmdline : cat test_1619955152/7500_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 7500 test_1619955152/7500_hashes.txt
-  // test_1619967069/test_report.log:! unhandled return code 139, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 3 -m 7500  test_1619967069/7500_multihash_bruteforce.txt test_1619967069/7500_passwords.txt
-  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
-  {
-    return true;
-  }
-
-  return false;
+  return jit_build_options;
 }
 
 int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
@@ -288,7 +287,7 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_hook23                   = MODULE_DEFAULT;
   module_ctx->module_hook_salt_size           = MODULE_DEFAULT;
   module_ctx->module_hook_size                = MODULE_DEFAULT;
-  module_ctx->module_jit_build_options        = MODULE_DEFAULT;
+  module_ctx->module_jit_build_options        = module_jit_build_options;
   module_ctx->module_jit_cache_disable        = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_max         = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_min         = MODULE_DEFAULT;
@@ -315,6 +314,6 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_st_hash                  = module_st_hash;
   module_ctx->module_st_pass                  = module_st_pass;
   module_ctx->module_tmp_size                 = MODULE_DEFAULT;
-  module_ctx->module_unstable_warning         = module_unstable_warning;
+  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
   module_ctx->module_warmup_disable           = MODULE_DEFAULT;
 }
diff --git a/src/modules/module_11700.c b/src/modules/module_11700.c
index bb130f11a..eb872087c 100644
--- a/src/modules/module_11700.c
+++ b/src/modules/module_11700.c
@@ -41,16 +41,25 @@ u32         module_salt_type      (MAYBE_UNUSED const hashconfig_t *hashconfig,
 const char *module_st_hash        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH;         }
 const char *module_st_pass        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS;         }
 
-bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
+char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
-  // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619955152/test_report.log:! unhandled return code 255, cmdline : cat test_1619955152/11700_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 11700 test_1619955152/11700_hashes.txt
-  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
+  char *jit_build_options = NULL;
+
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the s_sbob_sl64 requires (256 + 4) 16640.
+
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
   {
-    return true;
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
+    {
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
+    }
   }
 
-  return false;
+  return jit_build_options;
 }
 
 int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
@@ -162,7 +171,7 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_hook23                   = MODULE_DEFAULT;
   module_ctx->module_hook_salt_size           = MODULE_DEFAULT;
   module_ctx->module_hook_size                = MODULE_DEFAULT;
-  module_ctx->module_jit_build_options        = MODULE_DEFAULT;
+  module_ctx->module_jit_build_options        = module_jit_build_options;
   module_ctx->module_jit_cache_disable        = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_max         = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_min         = MODULE_DEFAULT;
@@ -189,6 +198,6 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_st_hash                  = module_st_hash;
   module_ctx->module_st_pass                  = module_st_pass;
   module_ctx->module_tmp_size                 = MODULE_DEFAULT;
-  module_ctx->module_unstable_warning         = module_unstable_warning;
+  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
   module_ctx->module_warmup_disable           = MODULE_DEFAULT;
 }
diff --git a/src/modules/module_11750.c b/src/modules/module_11750.c
index a65af5257..8ef88b63b 100644
--- a/src/modules/module_11750.c
+++ b/src/modules/module_11750.c
@@ -41,19 +41,25 @@ u32         module_salt_type      (MAYBE_UNUSED const hashconfig_t *hashconfig,
 const char *module_st_hash        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH;         }
 const char *module_st_pass        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS;         }
 
-bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
+char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
-  // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619943729/test_report.log:! unhandled return code 255, cmdline : cat test_1619943729/11750_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -O -D 2 --backend-vector-width 1 -a 0 -m 11750 test_1619943729/11750_hashes.txt
-  // test_1619950656/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -O -D 2 --backend-vector-width 4 -a 3 -m 11750  test_1619950656/11750_multihash_bruteforce.txt test_1619950656/11750_passwords.txt
-  // test_1619955152/test_report.log:! unhandled return code 255, cmdline : cat test_1619955152/11750_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 11750 test_1619955152/11750_hashes.txt
-  // test_1619967069/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 3 -m 11750  test_1619967069/11750_multihash_bruteforce.txt test_1619967069/11750_passwords.txt
-  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
+  char *jit_build_options = NULL;
+
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the s_sbob_sl64 requires (256 + 4) 16640.
+
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
   {
-    return true;
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
+    {
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
+    }
   }
 
-  return false;
+  return jit_build_options;
 }
 
 int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
@@ -192,7 +198,7 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_hook23                   = MODULE_DEFAULT;
   module_ctx->module_hook_salt_size           = MODULE_DEFAULT;
   module_ctx->module_hook_size                = MODULE_DEFAULT;
-  module_ctx->module_jit_build_options        = MODULE_DEFAULT;
+  module_ctx->module_jit_build_options        = module_jit_build_options;
   module_ctx->module_jit_cache_disable        = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_max         = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_min         = MODULE_DEFAULT;
@@ -219,6 +225,6 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_st_hash                  = module_st_hash;
   module_ctx->module_st_pass                  = module_st_pass;
   module_ctx->module_tmp_size                 = MODULE_DEFAULT;
-  module_ctx->module_unstable_warning         = module_unstable_warning;
+  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
   module_ctx->module_warmup_disable           = MODULE_DEFAULT;
 }
diff --git a/src/modules/module_11760.c b/src/modules/module_11760.c
index 1581974f4..d81290f24 100644
--- a/src/modules/module_11760.c
+++ b/src/modules/module_11760.c
@@ -41,19 +41,25 @@ u32         module_salt_type      (MAYBE_UNUSED const hashconfig_t *hashconfig,
 const char *module_st_hash        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH;         }
 const char *module_st_pass        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS;         }
 
-bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
+char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
-  // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619943729/test_report.log:! unhandled return code 255, cmdline : cat test_1619943729/11760_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -O -D 2 --backend-vector-width 1 -a 0 -m 11760 test_1619943729/11760_hashes.txt
-  // test_1619950656/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -O -D 2 --backend-vector-width 4 -a 3 -m 11760  test_1619950656/11760_multihash_bruteforce.txt test_1619950656/11760_passwords.txt
-  // test_1619955152/test_report.log:! unhandled return code 255, cmdline : cat test_1619955152/11760_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 11760 test_1619955152/11760_hashes.txt
-  // test_1619967069/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 3 -m 11760  test_1619967069/11760_multihash_bruteforce.txt test_1619967069/11760_passwords.txt
-  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
+  char *jit_build_options = NULL;
+
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the s_sbob_sl64 requires (256 + 4) 16640.
+
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
   {
-    return true;
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
+    {
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
+    }
   }
 
-  return false;
+  return jit_build_options;
 }
 
 int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
@@ -192,7 +198,7 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_hook23                   = MODULE_DEFAULT;
   module_ctx->module_hook_salt_size           = MODULE_DEFAULT;
   module_ctx->module_hook_size                = MODULE_DEFAULT;
-  module_ctx->module_jit_build_options        = MODULE_DEFAULT;
+  module_ctx->module_jit_build_options        = module_jit_build_options;
   module_ctx->module_jit_cache_disable        = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_max         = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_min         = MODULE_DEFAULT;
@@ -219,6 +225,6 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_st_hash                  = module_st_hash;
   module_ctx->module_st_pass                  = module_st_pass;
   module_ctx->module_tmp_size                 = MODULE_DEFAULT;
-  module_ctx->module_unstable_warning         = module_unstable_warning;
+  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
   module_ctx->module_warmup_disable           = MODULE_DEFAULT;
 }
diff --git a/src/modules/module_11800.c b/src/modules/module_11800.c
index 153a79fb4..89bd377d9 100644
--- a/src/modules/module_11800.c
+++ b/src/modules/module_11800.c
@@ -41,16 +41,25 @@ u32         module_salt_type      (MAYBE_UNUSED const hashconfig_t *hashconfig,
 const char *module_st_hash        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH;         }
 const char *module_st_pass        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS;         }
 
-bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
+char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
-  // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619955152/test_report.log:! unhandled return code 255, cmdline : cat test_1619955152/11800_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 11800 test_1619955152/11800_hashes.txt
-  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
+  char *jit_build_options = NULL;
+
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the s_sbob_sl64 requires (256 + 4) 16640.
+
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
   {
-    return true;
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
+    {
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
+    }
   }
 
-  return false;
+  return jit_build_options;
 }
 
 int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
@@ -186,7 +195,7 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_hook23                   = MODULE_DEFAULT;
   module_ctx->module_hook_salt_size           = MODULE_DEFAULT;
   module_ctx->module_hook_size                = MODULE_DEFAULT;
-  module_ctx->module_jit_build_options        = MODULE_DEFAULT;
+  module_ctx->module_jit_build_options        = module_jit_build_options;
   module_ctx->module_jit_cache_disable        = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_max         = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_min         = MODULE_DEFAULT;
@@ -213,6 +222,6 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_st_hash                  = module_st_hash;
   module_ctx->module_st_pass                  = module_st_pass;
   module_ctx->module_tmp_size                 = MODULE_DEFAULT;
-  module_ctx->module_unstable_warning         = module_unstable_warning;
+  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
   module_ctx->module_warmup_disable           = MODULE_DEFAULT;
 }
diff --git a/src/modules/module_11850.c b/src/modules/module_11850.c
index 2245ec226..18a993aa2 100644
--- a/src/modules/module_11850.c
+++ b/src/modules/module_11850.c
@@ -41,19 +41,25 @@ u32         module_salt_type      (MAYBE_UNUSED const hashconfig_t *hashconfig,
 const char *module_st_hash        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH;         }
 const char *module_st_pass        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS;         }
 
-bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
+char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
-  // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619943729/test_report.log:! unhandled return code 255, cmdline : cat test_1619943729/11850_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -O -D 2 --backend-vector-width 1 -a 0 -m 11850 test_1619943729/11850_hashes.txt
-  // test_1619950656/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -O -D 2 --backend-vector-width 4 -a 3 -m 11850 --increment --increment-min 1 --increment-max 8 test_1619950656/11850_multihash_bruteforce.txt ?d?d?d?d?d?d?d?d
-  // test_1619955152/test_report.log:! unhandled return code 255, cmdline : cat test_1619955152/11850_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 11850 test_1619955152/11850_hashes.txt
-  // test_1619967069/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 3 -m 11850  test_1619967069/11850_multihash_bruteforce.txt test_1619967069/11850_passwords.txt
-  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
+  char *jit_build_options = NULL;
+
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the s_sbob_sl64 requires (256 + 4) 16640.
+
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
   {
-    return true;
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
+    {
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
+    }
   }
 
-  return false;
+  return jit_build_options;
 }
 
 int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
@@ -216,7 +222,7 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_hook23                   = MODULE_DEFAULT;
   module_ctx->module_hook_salt_size           = MODULE_DEFAULT;
   module_ctx->module_hook_size                = MODULE_DEFAULT;
-  module_ctx->module_jit_build_options        = MODULE_DEFAULT;
+  module_ctx->module_jit_build_options        = module_jit_build_options;
   module_ctx->module_jit_cache_disable        = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_max         = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_min         = MODULE_DEFAULT;
@@ -243,6 +249,6 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_st_hash                  = module_st_hash;
   module_ctx->module_st_pass                  = module_st_pass;
   module_ctx->module_tmp_size                 = MODULE_DEFAULT;
-  module_ctx->module_unstable_warning         = module_unstable_warning;
+  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
   module_ctx->module_warmup_disable           = MODULE_DEFAULT;
 }
diff --git a/src/modules/module_11860.c b/src/modules/module_11860.c
index 55735baab..ad29aa7a5 100644
--- a/src/modules/module_11860.c
+++ b/src/modules/module_11860.c
@@ -41,19 +41,25 @@ u32         module_salt_type      (MAYBE_UNUSED const hashconfig_t *hashconfig,
 const char *module_st_hash        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH;         }
 const char *module_st_pass        (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS;         }
 
-bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
+char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
-  // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619943729/test_report.log:! unhandled return code 255, cmdline : cat test_1619943729/11860_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -O -D 2 --backend-vector-width 1 -a 0 -m 11860 test_1619943729/11860_hashes.txt
-  // test_1619950656/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -O -D 2 --backend-vector-width 4 -a 3 -m 11860  test_1619950656/11860_multihash_bruteforce.txt test_1619950656/11860_passwords.txt
-  // test_1619955152/test_report.log:! unhandled return code 255, cmdline : cat test_1619955152/11860_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 11860 test_1619955152/11860_hashes.txt
-  // test_1619967069/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 3 -m 11860  test_1619967069/11860_multihash_bruteforce.txt test_1619967069/11860_passwords.txt
-  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
+  char *jit_build_options = NULL;
+
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the s_sbob_sl64 requires (256 + 4) 16640.
+
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
   {
-    return true;
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
+    {
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
+    }
   }
 
-  return false;
+  return jit_build_options;
 }
 
 int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
@@ -216,7 +222,7 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_hook23                   = MODULE_DEFAULT;
   module_ctx->module_hook_salt_size           = MODULE_DEFAULT;
   module_ctx->module_hook_size                = MODULE_DEFAULT;
-  module_ctx->module_jit_build_options        = MODULE_DEFAULT;
+  module_ctx->module_jit_build_options        = module_jit_build_options;
   module_ctx->module_jit_cache_disable        = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_max         = MODULE_DEFAULT;
   module_ctx->module_kernel_accel_min         = MODULE_DEFAULT;
@@ -243,6 +249,6 @@ void module_init (module_ctx_t *module_ctx)
   module_ctx->module_st_hash                  = module_st_hash;
   module_ctx->module_st_pass                  = module_st_pass;
   module_ctx->module_tmp_size                 = MODULE_DEFAULT;
-  module_ctx->module_unstable_warning         = module_unstable_warning;
+  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
   module_ctx->module_warmup_disable           = MODULE_DEFAULT;
 }
diff --git a/src/modules/module_13100.c b/src/modules/module_13100.c
index e82cf9da8..3815b614e 100644
--- a/src/modules/module_13100.c
+++ b/src/modules/module_13100.c
@@ -73,10 +73,30 @@ u32 module_kernel_threads_max (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYB
   return kernel_threads_max;
 }
 
+char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
+{
+  char *jit_build_options = NULL;
+
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the RC4_KEY with 64 threads requires (256 + 4) 16640.
+
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
+  {
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
+    {
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
+    }
+  }
+
+  return jit_build_options;
+}
+
 bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
   // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619955152/test_report.log:! unhandled return code 139, cmdline : cat test_1619955152/13100_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 13100 test_1619955152/13100_hashes.txt
   // test_1619967069/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 3 -m 13100 --increment --increment-min 1 --increment-max 8 test_1619967069/13100_multihash_bruteforce.txt ?d?d?d?d?d?d?d?d
   if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
   {
diff --git a/src/modules/module_18200.c b/src/modules/module_18200.c
index 9954d5ef6..1dbb470c4 100644
--- a/src/modules/module_18200.c
+++ b/src/modules/module_18200.c
@@ -56,22 +56,18 @@ char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAY
 {
   char *jit_build_options = NULL;
 
-  // Extra treatment for Apple systems
-  if (device_param->opencl_platform_vendor_id == VENDOR_ID_APPLE)
-  {
-    return jit_build_options;
-  }
+  // in pure -a 0 mode we reserve pws_t with 64 threads = 256 + 4 bytes = 16640.
+  // the RC4_KEY with 64 threads requires (256 + 4) 16640.
 
-  // NVIDIA GPU
-  if (device_param->opencl_device_vendor_id == VENDOR_ID_NV)
+  if ((hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) == 0)
   {
-    hc_asprintf (&jit_build_options, "-D _unroll");
-  }
-
-  // AMD-GPU-PRO
-  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
-  {
-    hc_asprintf (&jit_build_options, "-D _unroll");
+    if (user_options_extra->attack_kern == ATTACK_KERN_STRAIGHT)
+    {
+      if (device_param->device_local_mem_size < 49152)
+      {
+        hc_asprintf (&jit_build_options, "-D FORCE_DISABLE_SHM");
+      }
+    }
   }
 
   return jit_build_options;
@@ -100,17 +96,7 @@ u32 module_kernel_threads_max (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYB
 
 bool module_unstable_warning (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hc_device_param_t *device_param)
 {
-  if (device_param->opencl_platform_vendor_id == VENDOR_ID_APPLE)
-  {
-    // self-test failed
-    if ((device_param->opencl_device_vendor_id == VENDOR_ID_INTEL_SDK) && (device_param->opencl_device_type & CL_DEVICE_TYPE_GPU))
-    {
-      return true;
-    }
-  }
-
   // amdgpu-pro-20.50-1234664-ubuntu-20.04 (legacy)
-  // test_1619955152/test_report.log:! unhandled return code 139, cmdline : cat test_1619955152/18200_passwords.txt | ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 0 -m 18200 test_1619955152/18200_hashes.txt
   // test_1619967069/test_report.log:! unhandled return code 255, cmdline : ./hashcat --quiet --potfile-disable --runtime 400 --hwmon-disable -D 2 --backend-vector-width 4 -a 3 -m 18200  test_1619967069/18200_multihash_bruteforce.txt test_1619967069/18200_passwords.txt
   if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
   {