From: Shay Drory shayd@nvidia.com
[ Upstream commit cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa ]
The device attach triggers addition of CM_ID to the restrack DB. However, when error occurs, we releasing this device, but defer CM_ID release. This causes to the situation where restrack sees CM_ID that is not valid anymore.
As a solution, add the CM_ID to the resource tracking DB only after the attachment is finished.
Found by syzcaller: infiniband syz0: added syz_tun rdma_rxe: ignoring netdev event = 10 for syz_tun infiniband syz0: set down infiniband syz0: ib_query_port failed (-19) restrack: ------------[ cut here ]------------ infiniband syz0: BUG: RESTRACK detected leak of resources restrack: User CM_ID object allocated by syz-executor716 is not freed restrack: ------------[ cut here ]------------
Fixes: b09c4d701220 ("RDMA/restrack: Improve readability in task name management") Link: https://lore.kernel.org/r/ab93e56ba831eac65c322b3256796fa1589ec0bb.161875386... Signed-off-by: Shay Drory shayd@nvidia.com Signed-off-by: Leon Romanovsky leonro@nvidia.com Signed-off-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/core/cma.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index e3638f80e1d5..6af066a2c8c0 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -463,7 +463,6 @@ static void _cma_attach_to_dev(struct rdma_id_private *id_priv, id_priv->id.route.addr.dev_addr.transport = rdma_node_get_transport(cma_dev->device->node_type); list_add_tail(&id_priv->list, &cma_dev->id_list); - rdma_restrack_add(&id_priv->res);
trace_cm_id_attach(id_priv, cma_dev->device); } @@ -700,6 +699,7 @@ static int cma_ib_acquire_dev(struct rdma_id_private *id_priv, mutex_lock(&lock); cma_attach_to_dev(id_priv, listen_id_priv->cma_dev); mutex_unlock(&lock); + rdma_restrack_add(&id_priv->res); return 0; }
@@ -754,8 +754,10 @@ static int cma_iw_acquire_dev(struct rdma_id_private *id_priv, }
out: - if (!ret) + if (!ret) { cma_attach_to_dev(id_priv, cma_dev); + rdma_restrack_add(&id_priv->res); + }
mutex_unlock(&lock); return ret; @@ -816,6 +818,7 @@ static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
found: cma_attach_to_dev(id_priv, cma_dev); + rdma_restrack_add(&id_priv->res); mutex_unlock(&lock); addr = (struct sockaddr_ib *)cma_src_addr(id_priv); memcpy(&addr->sib_addr, &sgid, sizeof(sgid)); @@ -2529,6 +2532,7 @@ static int cma_listen_on_dev(struct rdma_id_private *id_priv, rdma_addr_size(cma_src_addr(id_priv)));
_cma_attach_to_dev(dev_id_priv, cma_dev); + rdma_restrack_add(&dev_id_priv->res); cma_id_get(id_priv); dev_id_priv->internal_id = 1; dev_id_priv->afonly = id_priv->afonly; @@ -3169,6 +3173,7 @@ port_found: ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); id_priv->id.port_num = p; cma_attach_to_dev(id_priv, cma_dev); + rdma_restrack_add(&id_priv->res); cma_set_loopback(cma_src_addr(id_priv)); out: mutex_unlock(&lock); @@ -3201,6 +3206,7 @@ static void addr_handler(int status, struct sockaddr *src_addr, if (status) pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n", status); + rdma_restrack_add(&id_priv->res); } else if (status) { pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status); } @@ -3812,6 +3818,8 @@ int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) if (ret) goto err2;
+ if (!cma_any_addr(addr)) + rdma_restrack_add(&id_priv->res); return 0; err2: if (id_priv->cma_dev)