diff --git a/rimage b/rimage
index 48777207f..4ce79b152 160000
--- a/rimage
+++ b/rimage
@@ -1 +1 @@
-Subproject commit 48777207f5fdc49314dd4709d660e891c48d5ba9
+Subproject commit 4ce79b152e23c7b3937a09ef57cdd69d125a9214
diff --git a/zephyr/lib/regions_mm.c b/zephyr/lib/regions_mm.c
index 636041b2f..d0d91b9e5 100644
--- a/zephyr/lib/regions_mm.c
+++ b/zephyr/lib/regions_mm.c
@@ -6,10 +6,13 @@
  */
 
 #include <sof/lib/regions_mm.h>
+#include <zephyr/logging/log.h>
 
 /* list of vmh_heap objects created */
 static struct list_item vmh_list;
 
+LOG_MODULE_REGISTER(vmh, CONFIG_SOF_LOG_LEVEL);
+
 /**
  * @brief Initialize new heap
  *
@@ -258,13 +261,21 @@ void *vmh_alloc(struct vmh_heap *heap, uint32_t alloc_size)
 		/* calculate block count needed to allocate for current
 		 * mem_block.
 		 */
+		if (!heap->physical_blocks_allocators[mem_block_iterator]) {
+			LOG_ERR("NULL allocator #%d", mem_block_iterator);
+			return NULL;
+		}
 		block_size =
 		    1 << heap->physical_blocks_allocators[mem_block_iterator]->blk_sz_shift;
 		block_count = SOF_DIV_ROUND_UP((uint64_t)alloc_size, (uint64_t)block_size);
 
 		if (block_count >
-		    heap->physical_blocks_allocators[mem_block_iterator]->num_blocks)
+		    heap->physical_blocks_allocators[mem_block_iterator]->num_blocks) {
+			LOG_INF("insufficient blocks %d of %d vs. %d",
+				heap->physical_blocks_allocators[mem_block_iterator]->num_blocks,
+				block_size, block_count);
 			continue;
+		}
 		/* Try span alloc on first available mem_block for non span
 		 * check if block size is sufficient.
 		 */
@@ -277,6 +288,7 @@ void *vmh_alloc(struct vmh_heap *heap, uint32_t alloc_size)
 				heap->physical_blocks_allocators[mem_block_iterator], block_count,
 				&ptr);
 		}
+
 		/* Save allocation data for purpose of freeing correctly
 		 * afterwards should be changed to a implementation in mem_blocks
 		 * that keeps alloc data there.
@@ -321,7 +333,11 @@ void *vmh_alloc(struct vmh_heap *heap, uint32_t alloc_size)
 				sys_bitarray_set_region(heap->allocation_sizes[mem_block_iterator],
 					block_count - 1, allocation_bitarray_position);
 			break;
-		}
+		} else
+			LOG_ERR("error %d allocating %d of %d of size %d",
+				allocation_error_code, block_count,
+				heap->physical_blocks_allocators[mem_block_iterator]->num_blocks,
+				block_size);
 	}
 
 	/* If ptr is NULL it means we did not allocate anything and we should