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net/mlx5: Avoid double free in fs init error unwinding path 

In below code flow, for ingress acl table root ns memory leads
to double free.

mlx5_init_fs
  init_ingress_acls_root_ns()
    init_ingress_acl_root_ns
       kfree(steering->esw_ingress_root_ns);
       /* steering->esw_ingress_root_ns is not marked NULL */
  mlx5_cleanup_fs
    cleanup_ingress_acls_root_ns
       steering->esw_ingress_root_ns non NULL check passes.
       kfree(steering->esw_ingress_root_ns);
       /* double free */

Similar issue exist for other tables.

Hence zero out the pointers to not process the table again.

Fixes: 9b93ab981e ("net/mlx5: Separate ingress/egress namespaces for each vport")
Fixes: 40c3eebb49e51 ("net/mlx5: Add support in RDMA RX steering")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Parav Pandit 2019-05-10 10:26:23 -05:00 committed by Saeed Mahameed
parent 905f6bd30b
commit 9414277a5d
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
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@ -2427,6 +2427,7 @@ static void cleanup_egress_acls_root_ns(struct mlx5_core_dev *dev)
cleanup_root_ns(steering->esw_egress_root_ns[i]);
kfree(steering->esw_egress_root_ns);
steering->esw_egress_root_ns = NULL;
}
static void cleanup_ingress_acls_root_ns(struct mlx5_core_dev *dev)
@ -2441,6 +2442,7 @@ static void cleanup_ingress_acls_root_ns(struct mlx5_core_dev *dev)
cleanup_root_ns(steering->esw_ingress_root_ns[i]);
kfree(steering->esw_ingress_root_ns);
steering->esw_ingress_root_ns = NULL;
}
void mlx5_cleanup_fs(struct mlx5_core_dev *dev)
@ -2625,6 +2627,7 @@ cleanup_root_ns:
for (i--; i >= 0; i--)
cleanup_root_ns(steering->esw_egress_root_ns[i]);
kfree(steering->esw_egress_root_ns);
steering->esw_egress_root_ns = NULL;
return err;
}
@ -2652,6 +2655,7 @@ cleanup_root_ns:
for (i--; i >= 0; i--)
cleanup_root_ns(steering->esw_ingress_root_ns[i]);
kfree(steering->esw_ingress_root_ns);
steering->esw_ingress_root_ns = NULL;
return err;
}