[PATCH 6.6 18/72] net/mlx5e: Skip ESN replay window setup for IPsec crypto offload

Greg Kroah-Hartman
2026-02-04T15:19:54Z

From: Jianbo Liu <jianbol@nvidia.com>

[ Upstream commit 011be342dd24b5168a5dcf408b14c3babe503341 ]

Commit a5e400a985df ("net/mlx5e: Honor user choice of IPsec replay
window size") introduced logic to setup the ESN replay window size.
This logic is only valid for packet offload.

However, the check to skip this block only covered outbound offloads.
It was not skipped for crypto offload, causing it to fall through to
the new switch statement and trigger its WARN_ON default case (for
instance, if a window larger than 256 bits was configured).

Fix this by amending the condition to also skip the replay window
setup if the offload type is not XFRM_DEV_OFFLOAD_PACKET.

Fixes: a5e400a985df ("net/mlx5e: Honor user choice of IPsec replay window size")
Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1769503961-124173-5-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
index 5161bf51fa110..fdf664e9c46e9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
@@ -350,7 +350,8 @@ void mlx5e_ipsec_build_accel_xfrm_attrs(struct mlx5e_ipsec_sa_entry *sa_entry,
attrs->replay_esn.esn = sa_entry->esn_state.esn;
attrs->replay_esn.esn_msb = sa_entry->esn_state.esn_msb;
attrs->replay_esn.overlap = sa_entry->esn_state.overlap;
- if (attrs->dir == XFRM_DEV_OFFLOAD_OUT)
+ if (attrs->dir == XFRM_DEV_OFFLOAD_OUT ||
+ x->xso.type != XFRM_DEV_OFFLOAD_PACKET)
goto skip_replay_window;

switch (x->replay_esn->replay_window) {
--
2.51.0