[dpdk-stable] [PATCH 1/5] net/mlx5: check for a field size in modify field action
Alexander Kozyrev
akozyrev at nvidia.com
Tue Mar 23 19:52:08 CET 2021
Add a validation check to make sure that the specified width
for MODIFY_FIELD RTE action is not bigger than a field size.
Fixes: 641dbe4fb0 ("net/mlx5: support modify field flow action")
Cc: stable at dpdk.org
Signed-off-by: Alexander Kozyrev <akozyrev at nvidia.com>
---
drivers/net/mlx5/mlx5_flow_dv.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 23e5849783..4e78f54567 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -4610,7 +4610,8 @@ flow_dv_validate_action_modify_field(const uint64_t action_flags,
if (action_modify_field->dst.field != RTE_FLOW_FIELD_VALUE &&
action_modify_field->dst.field != RTE_FLOW_FIELD_POINTER) {
- if (action_modify_field->dst.offset >= dst_width ||
+ if ((action_modify_field->dst.offset +
+ action_modify_field->width > dst_width) ||
(action_modify_field->dst.offset % 32))
return rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION,
@@ -4626,7 +4627,8 @@ flow_dv_validate_action_modify_field(const uint64_t action_flags,
}
if (action_modify_field->src.field != RTE_FLOW_FIELD_VALUE &&
action_modify_field->src.field != RTE_FLOW_FIELD_POINTER) {
- if (action_modify_field->src.offset >= src_width ||
+ if ((action_modify_field->src.offset +
+ action_modify_field->width > src_width) ||
(action_modify_field->src.offset % 32))
return rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION,
@@ -4642,9 +4644,16 @@ flow_dv_validate_action_modify_field(const uint64_t action_flags,
}
if (action_modify_field->width == 0)
return rte_flow_error_set(error, EINVAL,
- RTE_FLOW_ERROR_TYPE_ACTION,
- NULL,
- "width is required for modify action");
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ NULL,
+ "cannot modify 0 bits");
+ else if (action_modify_field->width > dst_width ||
+ action_modify_field->width > src_width)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ NULL,
+ "cannot modify more bits than"
+ " the width of a field");
if (action_modify_field->dst.field ==
action_modify_field->src.field)
return rte_flow_error_set(error, EINVAL,
--
2.24.1
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