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

[Greg Kroah-Hartman]

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