diff --git a/mm/memory.c b/mm/memory.c
index dab1511294add14ba1290ded1dcd65408e274a4c..c5e87a3a82ba340254ff66b446c9b853fc211dde 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4395,6 +4395,9 @@ int generic_access_phys(struct vm_area_struct *vma, unsigned long addr,
 		return -EINVAL;
 
 	maddr = ioremap_prot(phys_addr, PAGE_ALIGN(len + offset), prot);
+	if (!maddr)
+		return -ENOMEM;
+
 	if (write)
 		memcpy_toio(maddr + offset, buf, len);
 	else