This is a note to let you know that I've just added the patch titled
rbd: don't put snap_context twice in rbd_queue_workfn()
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:
rbd-don-t-put-snap_context-twice-in-rbd_queue_workfn.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 <[email protected]> know about it.
>From 70b16db86f564977df074072143284aec2cb1162 Mon Sep 17 00:00:00 2001
From: Ilya Dryomov <[email protected]>
Date: Fri, 27 Nov 2015 19:23:24 +0100
Subject: rbd: don't put snap_context twice in rbd_queue_workfn()
From: Ilya Dryomov <[email protected]>
commit 70b16db86f564977df074072143284aec2cb1162 upstream.
Commit 4e752f0ab0e8 ("rbd: access snapshot context and mapping size
safely") moved ceph_get_snap_context() out of rbd_img_request_create()
and into rbd_queue_workfn(), adding a ceph_put_snap_context() to the
error path in rbd_queue_workfn(). However, rbd_img_request_create()
consumes a ref on snapc, so calling ceph_put_snap_context() after
a successful rbd_img_request_create() leads to an extra put. Fix it.
Signed-off-by: Ilya Dryomov <[email protected]>
Reviewed-by: Josh Durgin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/block/rbd.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3417,6 +3417,7 @@ static void rbd_queue_workfn(struct work
goto err_rq;
}
img_request->rq = rq;
+ snapc = NULL; /* img_request consumes a ref */
if (op_type == OBJ_OP_DISCARD)
result = rbd_img_request_fill(img_request, OBJ_REQUEST_NODATA,
Patches currently in stable-queue which might be from [email protected] are
queue-4.1/rbd-don-t-put-snap_context-twice-in-rbd_queue_workfn.patch
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