From: Dmytro Linkin dmitrolin@mellanox.com
[ Upstream commit c979c445a88e1c9dd7d8f90838c10456ae4ecd09 ]
Flow destination comparison has an inaccuracy: code see no difference between same vf ports, which belong to different pfs.
Example: If start ping from VF0 (PF1) to VF1 (PF1) and mirror all traffic to VF0 (PF2), icmp reply to VF0 (PF1) and mirrored flow to VF0 (PF2) would be determined as same destination. It lead to creating flow handler with rule nodes, which not added to node tree. When later driver try to delete this flow rules we got kernel crash.
Add comparison of vhca_id field to avoid this.
Fixes: 1228e912c934 ("net/mlx5: Consider encapsulation properties when comparing destinations") Signed-off-by: Dmytro Linkin dmitrolin@mellanox.com Reviewed-by: Roi Dayan roid@mellanox.com Reviewed-by: Vlad Buslov vladbu@mellanox.com Signed-off-by: Saeed Mahameed saeedm@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c @@ -1375,6 +1375,8 @@ static bool mlx5_flow_dests_cmp(struct m if ((d1->type == MLX5_FLOW_DESTINATION_TYPE_VPORT && d1->vport.num == d2->vport.num && d1->vport.flags == d2->vport.flags && + ((d1->vport.flags & MLX5_FLOW_DEST_VPORT_VHCA_ID) ? + (d1->vport.vhca_id == d2->vport.vhca_id) : true) && ((d1->vport.flags & MLX5_FLOW_DEST_VPORT_REFORMAT_ID) ? (d1->vport.reformat_id == d2->vport.reformat_id) : true)) || (d1->type == MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE &&