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Thu, 17 Apr 2025 19:38:38 -0700 (PDT) From: Henry Martin To: saeedm@nvidia.com, leon@kernel.org, tariqt@nvidia.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, bsdhenrymartin@gmail.com, mbloch@nvidia.com, amirtz@nvidia.com Cc: netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Michal Swiatkowski Subject: [PATCH v7 2/2] net/mlx5: Move ttc allocation after switch case to prevent leaks Date: Fri, 18 Apr 2025 10:38:14 +0800 Message-Id: <20250418023814.71789-3-bsdhenrymartin@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250418023814.71789-1-bsdhenrymartin@gmail.com> References: <20250418023814.71789-1-bsdhenrymartin@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Relocate the memory allocation for ttc table after the switch statement that validates params->ns_type in both mlx5_create_inner_ttc_table() and mlx5_create_ttc_table(). This ensures memory is only allocated after confirming valid input, eliminating potential memory leaks when invalid ns_type cases occur. Fixes: 137f3d50ad2a ("net/mlx5: Support matching on l4_type for ttc_table") Signed-off-by: Henry Martin Reviewed-by: Michal Swiatkowski Reviewed-by: Mark Bloch --- .../net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c b/drivers= /net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c index 066121fed718..513dafd5ebf2 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c @@ -637,10 +637,6 @@ struct mlx5_ttc_table *mlx5_create_inner_ttc_table(str= uct mlx5_core_dev *dev, bool use_l4_type; int err; =20 - ttc =3D kvzalloc(sizeof(*ttc), GFP_KERNEL); - if (!ttc) - return ERR_PTR(-ENOMEM); - switch (params->ns_type) { case MLX5_FLOW_NAMESPACE_PORT_SEL: use_l4_type =3D MLX5_CAP_GEN_2(dev, pcc_ifa2) && @@ -654,6 +650,10 @@ struct mlx5_ttc_table *mlx5_create_inner_ttc_table(str= uct mlx5_core_dev *dev, return ERR_PTR(-EINVAL); } =20 + ttc =3D kvzalloc(sizeof(*ttc), GFP_KERNEL); + if (!ttc) + return ERR_PTR(-ENOMEM); + ns =3D mlx5_get_flow_namespace(dev, params->ns_type); if (!ns) { kvfree(ttc); @@ -715,10 +715,6 @@ struct mlx5_ttc_table *mlx5_create_ttc_table(struct ml= x5_core_dev *dev, bool use_l4_type; int err; =20 - ttc =3D kvzalloc(sizeof(*ttc), GFP_KERNEL); - if (!ttc) - return ERR_PTR(-ENOMEM); - switch (params->ns_type) { case MLX5_FLOW_NAMESPACE_PORT_SEL: use_l4_type =3D MLX5_CAP_GEN_2(dev, pcc_ifa2) && @@ -732,6 +728,10 @@ struct mlx5_ttc_table *mlx5_create_ttc_table(struct ml= x5_core_dev *dev, return ERR_PTR(-EINVAL); } =20 + ttc =3D kvzalloc(sizeof(*ttc), GFP_KERNEL); + if (!ttc) + return ERR_PTR(-ENOMEM); + ns =3D mlx5_get_flow_namespace(dev, params->ns_type); if (!ns) { kvfree(ttc); --=20 2.34.1