diff --git a/mm/memory.c b/mm/memory.c
index 0e4c5fe..7c35fa7 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3873,7 +3873,7 @@
 	if (follow_phys(vma, addr, write, &prot, &phys_addr))
 		return -EINVAL;
 
-	maddr = ioremap_prot(phys_addr, PAGE_SIZE, prot);
+	maddr = ioremap_prot(phys_addr, PAGE_ALIGN(len + offset), prot);
 	if (write)
 		memcpy_toio(maddr + offset, buf, len);
 	else