netdev - [net-next 08/11] net/mlx5: SF, Consider own vhca events of SF devices

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 21 Apr 2021 10:47:20 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Parav Pandit <parav@...dia.com>,
        Vu Pham <vuhuong@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 08/11] net/mlx5: SF, Consider own vhca events of SF devices

From: Parav Pandit <parav@...dia.com>

Vhca events on eswitch manager are received for all the functions on the
NIC, including for SFs of external host PF controllers.

While SF device handler is only interested in SF devices events related
to its own PF.
Hence, validate if the function belongs to self or not.

Signed-off-by: Parav Pandit <parav@...dia.com>
Reviewed-by: Vu Pham <vuhuong@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c
index 90b524c59f3c..6a0c6f965ad1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c
@@ -148,9 +148,19 @@ mlx5_sf_dev_state_change_handler(struct notifier_block *nb, unsigned long event_
 	struct mlx5_sf_dev_table *table = container_of(nb, struct mlx5_sf_dev_table, nb);
 	const struct mlx5_vhca_state_event *event = data;
 	struct mlx5_sf_dev *sf_dev;
+	u16 max_functions;
 	u16 sf_index;
+	u16 base_id;
+
+	max_functions = mlx5_sf_max_functions(table->dev);
+	if (!max_functions)
+		return 0;
+
+	base_id = MLX5_CAP_GEN(table->dev, sf_base_id);
+	if (event->function_id < base_id || event->function_id >= (base_id + max_functions))
+		return 0;
 
-	sf_index = event->function_id - MLX5_CAP_GEN(table->dev, sf_base_id);
+	sf_index = event->function_id - base_id;
 	sf_dev = xa_load(&table->devices, sf_index);
 	switch (event->new_vhca_state) {
 	case MLX5_VHCA_STATE_ALLOCATED:
-- 
2.30.2