Patch "nbd: don't set the device size until we're connected" has been added to the 4.13-stable tree

Patch "nbd: don't set the device size until we're connected" has been added to the 4.13-stable tree

[gregkh]

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

    nbd: don't set the device size until we're connected

to the 4.13-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:
     nbd-don-t-set-the-device-size-until-we-re-connected.patch
and it can be found in the queue-4.13 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 639812a1ed9bf49ae2c026086fbf975339cd1eef Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fb.com>
Date: Mon, 9 Oct 2017 13:12:10 -0400
Subject: nbd: don't set the device size until we're connected

From: Josef Bacik <jbacik@fb.com>

commit 639812a1ed9bf49ae2c026086fbf975339cd1eef upstream.

A user reported a regression with using the normal ioctl interface on
newer kernels.  This happens because I was setting the device size
before the device was actually connected, which caused us to error out
and close everything down.  This didn't happen on netlink because we
hold the device lock the whole time we're setting things up, but we
don't do that for the ioctl path.  This fixes the problem.

Fixes: 29eaadc ("nbd: stop using the bdev everywhere")
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/block/nbd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -243,7 +243,6 @@ static void nbd_size_set(struct nbd_devi
 	struct nbd_config *config = nbd->config;
 	config->blksize = blocksize;
 	config->bytesize = blocksize * nr_blocks;
-	nbd_size_update(nbd);
 }
 
 static void nbd_complete_rq(struct request *req)
@@ -1090,6 +1089,7 @@ static int nbd_start_device(struct nbd_d
 		args->index = i;
 		queue_work(recv_workqueue, &args->work);
 	}
+	nbd_size_update(nbd);
 	return error;
 }
 


Patches currently in stable-queue which might be from jbacik@fb.com are

queue-4.13/nbd-don-t-set-the-device-size-until-we-re-connected.patch