net/sched/act_api.c:875:15: warning: Uninitialized variable: id_ptr->id [uninitvar]

[kernel test robot <lkp@intel.com>]

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CC: kbuild-all(a)lists.01.org
BCC: lkp(a)intel.com
CC: linux-kernel(a)vger.kernel.org
TO: Baowen Zheng <baowen.zheng@corigine.com>
CC: Louis Peens <louis.peens@corigine.com>
CC: Simon Horman <simon.horman@corigine.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   559089e0a93d44280ec3ab478830af319c56dbe3
commit: 13926d19a11e303f12571df61b7bb64f17cb4561 flow_offload: add reoffload process to update hw_count
date:   4 months ago
:::::: branch date: 20 hours ago
:::::: commit date: 4 months ago
compiler: sparc64-linux-gcc (GCC) 11.2.0
reproduce (cppcheck warning):
        # apt-get install cppcheck
        git checkout 13926d19a11e303f12571df61b7bb64f17cb4561
        cppcheck --quiet --enable=style,performance,portability --template=gcc FILE

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> net/x25/af_x25.c:308:75: warning: Parameter 'nb' can be declared with const [constParameter]
   static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb)
                                                                             ^
>> net/x25/af_x25.c:1628:5: warning: Redundant initialization for 'rc'. The initialized value is overwritten before it is read. [redundantInitialization]
    rc = -EFAULT;
       ^
   net/x25/af_x25.c:1626:9: note: rc is initialized
    int rc = -EINVAL;
           ^
   net/x25/af_x25.c:1628:5: note: rc is overwritten
    rc = -EFAULT;
       ^
--
   net/sched/act_api.c:1166:60: warning: Parameter 'actions' can be declared with const [constParameter]
   int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[],
                                                              ^
   net/sched/act_api.c:2005:54: warning: Parameter 'nla' can be declared with const [constParameter]
   static struct nlattr *find_dump_kind(struct nlattr **nla)
                                                        ^
>> net/sched/act_api.c:875:15: warning: Uninitialized variable: id_ptr->id [uninitvar]
     if (id_ptr->id == id) {
                 ^
   net/sched/act_api.c:901:15: warning: Uninitialized variable: id_ptr->id [uninitvar]
     if (id_ptr->id == id) {
                 ^

vim +875 net/sched/act_api.c

13926d19a11e30 Baowen Zheng 2021-12-17  867  
13926d19a11e30 Baowen Zheng 2021-12-17  868  static int tcf_pernet_add_id_list(unsigned int id)
13926d19a11e30 Baowen Zheng 2021-12-17  869  {
13926d19a11e30 Baowen Zheng 2021-12-17  870  	struct tc_act_pernet_id *id_ptr;
13926d19a11e30 Baowen Zheng 2021-12-17  871  	int ret = 0;
13926d19a11e30 Baowen Zheng 2021-12-17  872  
13926d19a11e30 Baowen Zheng 2021-12-17  873  	mutex_lock(&act_id_mutex);
13926d19a11e30 Baowen Zheng 2021-12-17  874  	list_for_each_entry(id_ptr, &act_pernet_id_list, list) {
13926d19a11e30 Baowen Zheng 2021-12-17 @875  		if (id_ptr->id == id) {
13926d19a11e30 Baowen Zheng 2021-12-17  876  			ret = -EEXIST;
13926d19a11e30 Baowen Zheng 2021-12-17  877  			goto err_out;
13926d19a11e30 Baowen Zheng 2021-12-17  878  		}
13926d19a11e30 Baowen Zheng 2021-12-17  879  	}
13926d19a11e30 Baowen Zheng 2021-12-17  880  
13926d19a11e30 Baowen Zheng 2021-12-17  881  	id_ptr = kzalloc(sizeof(*id_ptr), GFP_KERNEL);
13926d19a11e30 Baowen Zheng 2021-12-17  882  	if (!id_ptr) {
13926d19a11e30 Baowen Zheng 2021-12-17  883  		ret = -ENOMEM;
13926d19a11e30 Baowen Zheng 2021-12-17  884  		goto err_out;
13926d19a11e30 Baowen Zheng 2021-12-17  885  	}
13926d19a11e30 Baowen Zheng 2021-12-17  886  	id_ptr->id = id;
13926d19a11e30 Baowen Zheng 2021-12-17  887  
13926d19a11e30 Baowen Zheng 2021-12-17  888  	list_add_tail(&id_ptr->list, &act_pernet_id_list);
13926d19a11e30 Baowen Zheng 2021-12-17  889  
13926d19a11e30 Baowen Zheng 2021-12-17  890  err_out:
13926d19a11e30 Baowen Zheng 2021-12-17  891  	mutex_unlock(&act_id_mutex);
13926d19a11e30 Baowen Zheng 2021-12-17  892  	return ret;
13926d19a11e30 Baowen Zheng 2021-12-17  893  }
13926d19a11e30 Baowen Zheng 2021-12-17  894  

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