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[81.237.238.191]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5a2a068f5f1sm842596e87.55.2026.03.26.13.59.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Mar 2026 13:59:36 -0700 (PDT) From: Oskar Ray-Frayssinet To: saeedm@nvidia.com Cc: tariqt@nvidia.com, mbloch@nvidia.com, leon@kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Oskar Ray-Frayssinet Subject: [PATCH net 2/3] net/mlx5: Add null check for flow namespace in esw_set_slave_root_fdb Date: Thu, 26 Mar 2026 21:58:23 +0100 Message-ID: <20260326205824.11749-2-rayfraytech@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260326205824.11749-1-rayfraytech@gmail.com> References: <20260326205824.11749-1-rayfraytech@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: 8bit mlx5_get_flow_namespace() can return NULL if the namespace is not available. Add null checks to prevent potential null pointer dereference when accessing ns->node in both master and slave branches. Signed-off-by: Oskar Ray-Frayssinet --- drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c index 7a9ee36b8dca..63aff6255c02 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c @@ -2821,6 +2821,8 @@ static int esw_set_slave_root_fdb(struct mlx5_core_dev *master, if (master) { ns = mlx5_get_flow_namespace(master, MLX5_FLOW_NAMESPACE_FDB); + if (!ns) + return -EOPNOTSUPP; root = find_root(&ns->node); mutex_lock(&root->chain_lock); MLX5_SET(set_flow_table_root_in, in, @@ -2833,6 +2835,8 @@ static int esw_set_slave_root_fdb(struct mlx5_core_dev *master, } else { ns = mlx5_get_flow_namespace(slave, MLX5_FLOW_NAMESPACE_FDB); + if (!ns) + return -EOPNOTSUPP; root = find_root(&ns->node); mutex_lock(&root->chain_lock); MLX5_SET(set_flow_table_root_in, in, table_id, -- 2.43.0