diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1b6903f4c57b..2d5e492ef57f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3468,6 +3468,7 @@ struct vm_unmapped_area_info {
 	unsigned long high_limit;
 	unsigned long align_mask;
 	unsigned long align_offset;
+	unsigned long start_gap;
 };
 
 extern unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info);
diff --git a/mm/mmap.c b/mm/mmap.c
index 4ad386f3f63f..d3c2ca8efa53 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1579,7 +1579,7 @@ static unsigned long unmapped_area(struct vm_unmapped_area_info *info)
 	VMA_ITERATOR(vmi, current->mm, 0);
 
 	/* Adjust search length to account for worst case alignment overhead */
-	length = info->length + info->align_mask;
+	length = info->length + info->align_mask + info->start_gap;
 	if (length < info->length)
 		return -ENOMEM;
 
@@ -1591,7 +1591,13 @@ retry:
 	if (vma_iter_area_lowest(&vmi, low_limit, high_limit, length))
 		return -ENOMEM;
 
-	gap = vma_iter_addr(&vmi);
+	/*
+	 * Adjust for the gap first so it doesn't interfere with the
+	 * later alignment. The first step is the minimum needed to
+	 * fulill the start gap, the next steps is the minimum to align
+	 * that. It is the minimum needed to fulill both.
+	 */
+	gap = vma_iter_addr(&vmi) + info->start_gap;
 	gap += (info->align_offset - gap) & info->align_mask;
 	tmp = vma_next(&vmi);
 	if (tmp && (tmp->vm_flags & VM_STARTGAP_FLAGS)) { /* Avoid prev check if possible */
@@ -1630,7 +1636,7 @@ static unsigned long unmapped_area_topdown(struct vm_unmapped_area_info *info)
 	VMA_ITERATOR(vmi, current->mm, 0);
 
 	/* Adjust search length to account for worst case alignment overhead */
-	length = info->length + info->align_mask;
+	length = info->length + info->align_mask + info->start_gap;
 	if (length < info->length)
 		return -ENOMEM;