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Subject[PATCH 5.4 16/65] net/mlx5: Fix leak upon failure of rule creation
Date
From: Maor Gottlieb <maorg@nvidia.com>

[ Upstream commit a5bfe6b4675e0eefbd9418055b5cc6e89af27eb4 ]

When creation of a new rule that requires allocation of an FTE fails,
need to call to tree_put_node on the FTE in order to release its'
resource.

Fixes: cefc23554fc2 ("net/mlx5: Fix FTE cleanup")
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Reviewed-by: Alaa Hleihel <alaa@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 4944c40436f08..11e12761b0a6e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -1697,6 +1697,7 @@ search_again_locked:
if (!fte_tmp)
continue;
rule = add_rule_fg(g, spec, flow_act, dest, dest_num, fte_tmp);
+ /* No error check needed here, because insert_fte() is not called */
up_write_ref_node(&fte_tmp->node, false);
tree_put_node(&fte_tmp->node, false);
kmem_cache_free(steering->ftes_cache, fte);
@@ -1745,6 +1746,8 @@ skip_search:
up_write_ref_node(&g->node, false);
rule = add_rule_fg(g, spec, flow_act, dest, dest_num, fte);
up_write_ref_node(&fte->node, false);
+ if (IS_ERR(rule))
+ tree_put_node(&fte->node, false);
return rule;
}
rule = ERR_PTR(-ENOENT);
@@ -1844,6 +1847,8 @@ search_again_locked:
up_write_ref_node(&g->node, false);
rule = add_rule_fg(g, spec, flow_act, dest, dest_num, fte);
up_write_ref_node(&fte->node, false);
+ if (IS_ERR(rule))
+ tree_put_node(&fte->node, false);
tree_put_node(&g->node, false);
return rule;

--
2.27.0


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