linux-kernel - [PATCH 3.12 52/72] ceph: make sure request isn't in any waiting list when kicking request.

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Message-Id: <fcd082c0640d0f8eef3d0d2a17a62c9446a77cf2.1448283890.git.jslaby@suse.cz>
Date:	Mon, 23 Nov 2015 14:12:13 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, "Yan, Zheng" <ukernel@...il.com>,
	"Yan, Zheng" <zyan@...hat.com>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 52/72] ceph: make sure request isn't in any waiting list when kicking request.

From: "Yan, Zheng" <ukernel@...il.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 03974e8177b36d672eb59658f976f03cb77c1129 upstream.

we may corrupt waiting list if a request in the waiting list is kicked.

Signed-off-by: "Yan, Zheng" <zyan@...hat.com>
Reviewed-by: Sage Weil <sage@...hat.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 fs/ceph/mds_client.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 6f1161324f91..3e07f82a3c9d 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1985,6 +1985,7 @@ static void kick_requests(struct ceph_mds_client *mdsc, int mds)
 		if (req->r_session &&
 		    req->r_session->s_mds == mds) {
 			dout(" kicking tid %llu\n", req->r_tid);
+			list_del_init(&req->r_wait);
 			__do_request(mdsc, req);
 		}
 	}
-- 
2.6.3

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