From: saeed@kernel.org
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org, Dan Carpenter <dan.carpenter@oracle.com>,
Leon Romanovsky <leonro@nvidia.com>,
Saeed Mahameed <saeedm@nvidia.com>
Subject: [net-next 14/15] net/mlx5e: Fix a use after free on error in mlx5_tc_ct_shared_counter_get()
Date: Wed, 30 Sep 2020 21:33:01 -0700 [thread overview]
Message-ID: <20201001043302.48113-15-saeed@kernel.org> (raw)
In-Reply-To: <20201001043302.48113-1-saeed@kernel.org>
From: Dan Carpenter <dan.carpenter@oracle.com>
This code frees "shared_counter" and then dereferences on the next line
to get the error code.
Fixes: 1edae2335adf ("net/mlx5e: CT: Use the same counter for both directions")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
index b5f8ed30047b..cea2070af9af 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
@@ -739,6 +739,7 @@ mlx5_tc_ct_shared_counter_get(struct mlx5_tc_ct_priv *ct_priv,
struct mlx5_core_dev *dev = ct_priv->dev;
struct mlx5_ct_entry *rev_entry;
__be16 tmp_port;
+ int ret;
/* get the reversed tuple */
tmp_port = rev_tuple.port.src;
@@ -778,8 +779,9 @@ mlx5_tc_ct_shared_counter_get(struct mlx5_tc_ct_priv *ct_priv,
shared_counter->counter = mlx5_fc_create(dev, true);
if (IS_ERR(shared_counter->counter)) {
ct_dbg("Failed to create counter for ct entry");
+ ret = PTR_ERR(shared_counter->counter);
kfree(shared_counter);
- return ERR_PTR(PTR_ERR(shared_counter->counter));
+ return ERR_PTR(ret);
}
refcount_set(&shared_counter->refcount, 1);
--
2.26.2
next prev parent reply other threads:[~2020-10-01 4:33 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-01 4:32 [pull request][net-next 00/15] mlx5 updates 2020-09-30 saeed
2020-10-01 4:32 ` [net-next 01/15] net/mlx5: DR, Replace the check for valid STE entry saeed
2020-10-01 4:32 ` [net-next 02/15] net/mlx5: DR, Remove unneeded check from source port builder saeed
2020-10-01 4:32 ` [net-next 03/15] net/mlx5: DR, Remove unneeded vlan check from L2 builder saeed
2020-10-01 4:32 ` [net-next 04/15] net/mlx5: DR, Remove unneeded local variable saeed
2020-10-01 4:32 ` [net-next 05/15] net/mlx5: DR, Call ste_builder directly with tag pointer saeed
2020-10-01 4:32 ` [net-next 06/15] net/mlx5: DR, Add support for rule creation with flow source hint saeed
2020-10-01 4:32 ` [net-next 07/15] net/mlx5: E-switch, Use PF num in metadata reg c0 saeed
2020-10-01 4:32 ` [net-next 08/15] net/mlx5: E-switch, Add helper to check egress ACL need saeed
2020-10-01 4:32 ` [net-next 09/15] net/mlx5: E-switch, Use helper function to load unload representor saeed
2020-10-01 4:32 ` [net-next 10/15] net/mlx5: E-switch, Move devlink eswitch ports closer to eswitch saeed
2020-10-01 4:32 ` [net-next 11/15] net/mlx5: E-Switch, Support flow source for local vport saeed
2020-10-01 4:32 ` [net-next 12/15] net/mlx5: Use dma device access helper saeed
2020-10-01 4:33 ` [net-next 13/15] net/mlx5: Fix dereference on pointer attr after null check saeed
2020-10-01 4:33 ` saeed [this message]
2020-10-01 4:33 ` [net-next 15/15] net/mlx5e: Fix potential null pointer dereference saeed
2020-10-01 19:26 ` [pull request][net-next 00/15] mlx5 updates 2020-09-30 David Miller
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