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| author | Alex Elder <elder@inktank.com> | 2012-11-29 08:37:03 -0600 |
|---|---|---|
| committer | Alex Elder <elder@inktank.com> | 2012-12-17 08:37:19 -0600 |
| commit | 7d5f24812bd182a2471cb69c1c2baf0648332e1f (patch) | |
| tree | 412d6180cf9e0c14559b827331808414f767bfd3 /net | |
| parent | 42382b709bd1d143b9f0fa93e0a3a1f2f4210707 (diff) | |
| download | linux-7d5f24812bd182a2471cb69c1c2baf0648332e1f.tar.gz linux-7d5f24812bd182a2471cb69c1c2baf0648332e1f.tar.bz2 linux-7d5f24812bd182a2471cb69c1c2baf0648332e1f.zip | |
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ceph/osd_client.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 7ebfe13267e6..ac7be7202faa 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -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); |