Need to free object_prefix when rbd_dev_v2_snap_context() fails, but
only if this is the first time we are reading in the header.

Signed-off-by: Ilya Dryomov <idryo...@gmail.com>
---
 drivers/block/rbd.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 324bf35ec4dd..69d03aa46d0d 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -4720,7 +4720,10 @@ static int rbd_dev_v2_header_info(struct rbd_device 
*rbd_dev)
        }
 
        ret = rbd_dev_v2_snap_context(rbd_dev);
-       dout("rbd_dev_v2_snap_context returned %d\n", ret);
+       if (ret && first_time) {
+               kfree(rbd_dev->header.object_prefix);
+               rbd_dev->header.object_prefix = NULL;
+       }
 
        return ret;
 }
-- 
1.9.3

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