From 00b9f4c55728db861ae723ae88350e4ea4f053d9 Mon Sep 17 00:00:00 2001
From: Jens Steube <jens.steube@gmail.com>
Date: Tue, 19 Nov 2019 20:38:31 +0100
Subject: [PATCH] Add kernel accel minimum limit check

---
 src/backend.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/backend.c b/src/backend.c
index 66cb6a640..4970412e1 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -9414,7 +9414,12 @@ int backend_session_begin (hashcat_ctx_t *hashcat_ctx)
 
     kernel_accel_max = MIN (kernel_accel_max, accel_limit);
 
-    kernel_accel_min = MIN (kernel_accel_min, kernel_accel_max);
+    if (kernel_accel_min > kernel_accel_max)
+    {
+      event_log_error (hashcat_ctx, "* Device #%u: Too many compute units to keep minimum kernel accel limit. Retry with lower --backend-kernel-threads value.", device_id + 1);
+
+      return -1;
+    }
 
     // find out if we would request too much memory on memory blocks which are based on kernel_accel