ceph: fix message length computation

commit 777d738a5e58ba3b6f3932ab1543ce93703f4873 upstream.

create_request_message() computes the maximum length of a message,
but uses the wrong type for the time stamp: sizeof(struct timespec)
may be 8 or 16 depending on the architecture, while sizeof(struct
ceph_timespec) is always 8, and that is what gets put into the
message.

Found while auditing the uses of timespec for y2038 problems.

Fixes: b8e69066d8af ("ceph: include time stamp in every MDS request")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 84f37f34f9aa663952a60e8a3440a81934c083b0..1e99b29650a96a2cbec554ed1caac7d3c8096c31 100644 (file)
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1905,7 +1905,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
 
        len = sizeof(*head) +
                pathlen1 + pathlen2 + 2*(1 + sizeof(u32) + sizeof(u64)) +
-               sizeof(struct timespec);
+               sizeof(struct ceph_timespec);
 
        /* calculate (max) length for cap releases */
        len += sizeof(struct ceph_mds_request_release) *