Patch "ceph: fix message length computation" has been added to the 4.1-stable tree

Patch "ceph: fix message length computation" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ceph: fix message length computation

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ceph-fix-message-length-computation.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 777d738a5e58ba3b6f3932ab1543ce93703f4873 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 30 Sep 2015 15:04:42 +0200
Subject: ceph: fix message length computation

From: Arnd Bergmann <arnd@arndb.de>

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>

---
 fs/ceph/mds_client.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1905,7 +1905,7 @@ static struct ceph_msg *create_request_m
 
 	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) *


Patches currently in stable-queue which might be from arnd@arndb.de are

queue-4.1/ceph-fix-message-length-computation.patch