From ef4c5afc783dc3d47640270a9b94713229c697e8 Mon Sep 17 00:00:00 2001 From: Yevgeny Kliteynik Date: Sun, 4 Jun 2023 21:07:04 +0300 Subject: [PATCH] net/mlx5: DR, Fix wrong action data allocation in decap action When TUNNEL_L3_TO_L2 decap action was created, a pointer to a local variable was passed as its HW action data, resulting in attempt to free invalid address: BUG: KASAN: invalid-free in mlx5dr_action_destroy+0x318/0x410 [mlx5_core] Fixes: 4781df92f4da ("net/mlx5: DR, Move STEv0 modify header logic") Signed-off-by: Yevgeny Kliteynik Reviewed-by: Alex Vesker Signed-off-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c index 57e22c5170df..0f783e7906cb 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c @@ -1421,9 +1421,13 @@ dr_action_create_reformat_action(struct mlx5dr_domain *dmn, } case DR_ACTION_TYP_TNL_L3_TO_L2: { - u8 hw_actions[DR_ACTION_CACHE_LINE_SIZE] = {}; + u8 *hw_actions; int ret; + hw_actions = kzalloc(DR_ACTION_CACHE_LINE_SIZE, GFP_KERNEL); + if (!hw_actions) + return -ENOMEM; + ret = mlx5dr_ste_set_action_decap_l3_list(dmn->ste_ctx, data, data_sz, hw_actions, @@ -1431,6 +1435,7 @@ dr_action_create_reformat_action(struct mlx5dr_domain *dmn, &action->rewrite->num_of_actions); if (ret) { mlx5dr_dbg(dmn, "Failed creating decap l3 action list\n"); + kfree(hw_actions); return ret; } @@ -1440,6 +1445,7 @@ dr_action_create_reformat_action(struct mlx5dr_domain *dmn, ret = mlx5dr_ste_alloc_modify_hdr(action); if (ret) { mlx5dr_dbg(dmn, "Failed preparing reformat data\n"); + kfree(hw_actions); return ret; } return 0; -- 2.11.0