Merge: mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/4339

JIRA: https://issues.redhat.com/browse/RHEL-37006  
CVE: CVE-2024-35855  

Commits:
```
79b5b4b ("mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update")
```

Signed-off-by: Ivan Vecera <ivecera@redhat.com>

Approved-by: José Ignacio Tornos Martínez <jtornosm@redhat.com>
Approved-by: Petr Oros <poros@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Lucas Zampieri <lzampier@redhat.com>

Author: zampierilucas

drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c

@@ -1157,8 +1157,14 @@ mlxsw_sp_acl_tcam_ventry_activity_get(struct mlxsw_sp *mlxsw_sp,
 				      struct mlxsw_sp_acl_tcam_ventry *ventry,
 				      bool *activity)
 {
-	return mlxsw_sp_acl_tcam_entry_activity_get(mlxsw_sp,
-						    ventry->entry, activity);
+	struct mlxsw_sp_acl_tcam_vregion *vregion = ventry->vchunk->vregion;
+	int err;
+
+	mutex_lock(&vregion->lock);
+	err = mlxsw_sp_acl_tcam_entry_activity_get(mlxsw_sp, ventry->entry,
+						   activity);
+	mutex_unlock(&vregion->lock);
+	return err;
 }
 
 static int