[PATCH 5.12 148/242] flow_offload: action should not be NULL when it is referenced

From: Greg Kroah-Hartman
Date: Thu Jul 15 2021 - 15:14:23 EST


From: gushengxian <gushengxian@xxxxxxxxxx>

[ Upstream commit 9ea3e52c5bc8bb4a084938dc1e3160643438927a ]

"action" should not be NULL when it is referenced.

Signed-off-by: gushengxian <13145886936@xxxxxxx>
Signed-off-by: gushengxian <gushengxian@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
include/net/flow_offload.h | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index e6bd8ebf9ac3..c28ea1f0ec9c 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -313,12 +313,14 @@ flow_action_mixed_hw_stats_check(const struct flow_action *action,
if (flow_offload_has_one_action(action))
return true;

- flow_action_for_each(i, action_entry, action) {
- if (i && action_entry->hw_stats != last_hw_stats) {
- NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
- return false;
+ if (action) {
+ flow_action_for_each(i, action_entry, action) {
+ if (i && action_entry->hw_stats != last_hw_stats) {
+ NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
+ return false;
+ }
+ last_hw_stats = action_entry->hw_stats;
}
- last_hw_stats = action_entry->hw_stats;
}
return true;
}
--
2.30.2