From: "Yan, Zheng" <zheng.z.yan@xxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 282c105225ec3229f344c5fced795b9e1e634440 upstream.
__do_request() may unregister the request. So we should update
iterator 'p' before calling __do_request()
Signed-off-by: "Yan, Zheng" <zheng.z.yan@xxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
fs/ceph/mds_client.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 16c7e4ab94f0..5ef4c6ca5cb5 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1975,11 +1975,12 @@ static void __wake_requests(struct ceph_mds_client *mdsc,
static void kick_requests(struct ceph_mds_client *mdsc, int mds)
{
struct ceph_mds_request *req;
- struct rb_node *p;
+ struct rb_node *p = rb_first(&mdsc->request_tree);
dout("kick_requests mds%d\n", mds);
- for (p = rb_first(&mdsc->request_tree); p; p = rb_next(p)) {
+ while (p) {
req = rb_entry(p, struct ceph_mds_request, r_node);
+ p = rb_next(p);
if (req->r_got_unsafe)
continue;
if (req->r_session &&
--
2.6.3
--
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