From 4198aba4f431e2d2c24a11cdb9d53106fda00b43 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@kernel.org>
Date: Thu, 2 May 2019 08:06:50 -0400
Subject: [PATCH] ceph: fix unaligned access in ceph_send_cap_releases

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
 fs/ceph/mds_client.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 5f3f375cf0e9..959b1bf7c327 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1855,7 +1855,8 @@ again:
 		num_cap_releases--;
 
 		head = msg->front.iov_base;
-		le32_add_cpu(&head->num, 1);
+		put_unaligned_le32(get_unaligned_le32(&head->num) + 1,
+				   &head->num);
 		item = msg->front.iov_base + msg->front.iov_len;
 		item->ino = cpu_to_le64(cap->cap_ino);
 		item->cap_id = cpu_to_le64(cap->cap_id);