Commit 7d5f2481 authored Nov 29, 2012 by Alex Elder

ceph: don't reference req after put



In __unregister_request(), there is a call to list_del_init()
referencing a request that was the subject of a call to
ceph_osdc_put_request() on the previous line.  This is not
safe, because the request structure could have been freed
by the time we reach the list_del_init().

Fix this by reversing the order of these lines.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-off-by: Sage Weil <sage@inktank.com>

parent 42382b70

net/ceph/osd_client.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -871,9 +871,9 @@ static void __unregister_request(struct ceph_osd_client *osdc,
		req->r_osd = NULL;
		}

		list_del_init(&req->r_req_lru_item);
		ceph_osdc_put_request(req);

		list_del_init(&req->r_req_lru_item);
		if (osdc->num_requests == 0) {
		dout(" no requests, canceling timeout\n");
		__cancel_osd_timeout(osdc);