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>

1 files changed, 2 insertions, 1 deletions

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);