diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 75d8e7cf040e69bfcde16fb555c09054cfe9ebad..7a66d9d5a534aaa14fec346b025c66c9277c3cd5 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -518,6 +518,8 @@ int __weak arch_kexec_walk_mem(struct kexec_buf *kbuf,
 					   IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY,
 					   crashk_res.start, crashk_res.end,
 					   kbuf, func);
+	else if (kbuf->top_down)
+		return walk_system_ram_res_rev(0, ULONG_MAX, kbuf, func);
 	else
 		return walk_system_ram_res(0, ULONG_MAX, kbuf, func);
 }