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net/mlx5: Avoid double free of root ns in the error flow path 

When root ns setup for rdma, sniffer tx and sniffer rx fails,
such root ns cleanup is done by the error unwinding path of
mlx5_cleanup_fs().
Below call graph shows an example for sniffer_rx_root_ns.

mlx5_init_fs()
  init_sniffer_rx_root_ns()
    cleanup_root_ns(steering->sniffer_rx_root_ns);
mlx5_cleanup_fs()
  cleanup_root_ns(steering->sniffer_rx_root_ns);
  /* double free of sniffer_rx_root_ns */

Hence, use the existing cleanup_fs to cleanup.

Fixes: d83eb50e29 ("net/mlx5: Add support in RDMA RX steering")
Fixes: 87d22483ce ("net/mlx5: Add sniffer namespaces")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Parav Pandit 2019-05-09 17:23:24 -05:00 committed by Saeed Mahameed
parent 8788392995
commit 905f6bd30b
1 changed files with 3 additions and 15 deletions
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18
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
View File

@ -2474,11 +2474,7 @@ static int init_sniffer_tx_root_ns(struct mlx5_flow_steering *steering)
/* Create single prio */
prio = fs_create_prio(&steering->sniffer_tx_root_ns->ns, 0, 1);
if (IS_ERR(prio)) {
cleanup_root_ns(steering->sniffer_tx_root_ns);
return PTR_ERR(prio);
}
return 0;
return PTR_ERR_OR_ZERO(prio);
}
static int init_sniffer_rx_root_ns(struct mlx5_flow_steering *steering)
@ -2491,11 +2487,7 @@ static int init_sniffer_rx_root_ns(struct mlx5_flow_steering *steering)
/* Create single prio */
prio = fs_create_prio(&steering->sniffer_rx_root_ns->ns, 0, 1);
if (IS_ERR(prio)) {
cleanup_root_ns(steering->sniffer_rx_root_ns);
return PTR_ERR(prio);
}
return 0;
return PTR_ERR_OR_ZERO(prio);
}
static int init_rdma_rx_root_ns(struct mlx5_flow_steering *steering)
@ -2511,11 +2503,7 @@ static int init_rdma_rx_root_ns(struct mlx5_flow_steering *steering)
/* Create single prio */
prio = fs_create_prio(&steering->rdma_rx_root_ns->ns, 0, 1);
if (IS_ERR(prio)) {
cleanup_root_ns(steering->rdma_rx_root_ns);
return PTR_ERR(prio);
}
return 0;
return PTR_ERR_OR_ZERO(prio);
}
static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
{