RMDA/cm: Fix missing ib_cm_destroy_id() in ib_cm_insert_listen()

commit c14dfddbd869bf0c2bafb7ef260c41d9cebbcfec upstream.

The algorithm pre-allocates a cm_id since allocation cannot be done while
holding the cm.lock spinlock, however it doesn't free it on one error
path, leading to a memory leak.

Fixes: 067b171b8679 ("IB/cm: Share listening CM IDs")
Link: https://lore.kernel.org/r/20200221152023.GA8680@ziepe.ca
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index 71c7c4c328ef6bb438273395eb9b2d40667e5da3..304429fd04ddb664d824aeb19db3b354679e3a34 100644 (file)
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -1073,6 +1073,7 @@ struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
                        /* Sharing an ib_cm_id with different handlers is not
                         * supported */
                        spin_unlock_irqrestore(&cm.lock, flags);
+                       ib_destroy_cm_id(cm_id);
                        return ERR_PTR(-EINVAL);
                }
                atomic_inc(&cm_id_priv->refcount);