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| author | Alex Elder <elder@inktank.com> | 2012-11-30 09:59:47 -0600 |
|---|---|---|
| committer | Alex Elder <elder@inktank.com> | 2013-01-17 16:34:58 -0600 |
| commit | 1821665749a3d7e26ad470c63fc2c46990dc6041 (patch) | |
| tree | 5bcb560bcb31abf5af0dc723ccc4485f6062e86f /drivers/block/rbd.c | |
| parent | 2e53c6c379b65372df21f4d6019f6eb63af81384 (diff) | |
| download | linux-1821665749a3d7e26ad470c63fc2c46990dc6041.tar.gz linux-1821665749a3d7e26ad470c63fc2c46990dc6041.tar.bz2 linux-1821665749a3d7e26ad470c63fc2c46990dc6041.zip | |
rbd: don't leak rbd_req for rbd_req_sync_notify_ack()
When rbd_req_sync_notify_ack() calls rbd_do_request() it supplies
rbd_simple_req_cb() as its callback function. Because the callback
is supplied, an rbd_req structure gets allocated and populated so it
can be used by the callback. However rbd_simple_req_cb() is not
freeing (or even using) the rbd_req structure, so it's getting
leaked.
Since rbd_simple_req_cb() has no need for the rbd_req structure,
just avoid allocating one for this case. Of the three calls to
rbd_do_request(), only the one from rbd_do_op() needs the rbd_req
structure, and that call can be distinguished from the other two
because it supplies a non-null rbd_collection pointer.
So fix this leak by only allocating the rbd_req structure if a
non-null "coll" value is provided to rbd_do_request().
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'drivers/block/rbd.c')
| -rw-r--r-- | drivers/block/rbd.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 28b62367ff93..619d680960b1 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1135,7 +1135,7 @@ static int rbd_do_request(struct request *rq, bio_get(osd_req->r_bio); } - if (rbd_cb) { + if (coll) { ret = -ENOMEM; rbd_req = kmalloc(sizeof(*rbd_req), GFP_NOIO); if (!rbd_req) @@ -1146,7 +1146,7 @@ static int rbd_do_request(struct request *rq, rbd_req->pages = pages; rbd_req->len = len; rbd_req->coll = coll; - rbd_req->coll_index = coll ? coll_index : 0; + rbd_req->coll_index = coll_index; } osd_req->r_callback = rbd_cb; |