Commit 4893c938 authored Jun 24, 2021 by Gerd Rausch Committed by Greg Kroah-Hartman Jul 20, 2021

RDMA/cma: Fix rdma_resolve_route() memory leak

[ Upstream commit 74f160ead74bfe5f2b38afb4fcf86189f9ff40c9 ]

Fix a memory leak when "mda_resolve_route() is called more than once on
the same "rdma_cm_id".

This is possible if cma_query_handler() triggers the
RDMA_CM_EVENT_ROUTE_ERROR flow which puts the state machine back and
allows rdma_resolve_route() to be called again.

Link: https://lore.kernel.org/r/f6662b7b-bdb7-2706-1e12-47c61d3474b6@oracle.com


Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent a847a5e2

drivers/infiniband/core/cma.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -2558,6 +2558,7 @@ static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)

		cma_init_resolve_route_work(work, id_priv);

		if (!route->path_rec)
		route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
		if (!route->path_rec) {
		ret = -ENOMEM;