tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.4 head: d97c3e7785e0bbc76a30f4d8953cf278a7b25886 commit: 7bc0ce12818fb941334ac54afe37de4e6787a57e [36/38] net_sched: fix RTNL deadlock again caused by request_module() config: s390-randconfig-r022-20210411 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-5.4 git checkout 7bc0ce12818fb941334ac54afe37de4e6787a57e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): net/sched/act_api.c: In function 'tcf_action_init_1': 914 | u8 hw_stats = TCA_ACT_HW_STATS_ANY; | ^~~~~~~~~~~~~~~~~~~~ | TCA_ACT_STATS net/sched/act_api.c:914:16: note: each undeclared identifier is reported only once for each function it appears in 934 | hw_stats = tcf_action_hw_stats_get(tb[TCA_ACT_HW_STATS]); | ^~~~~~~~~~~~~~~~~~~~~~~ 934 | hw_stats = tcf_action_hw_stats_get(tb[TCA_ACT_HW_STATS]); | ^~~~~~~~~~~~~~~~ | TCA_ACT_STATS 935 | if (tb[TCA_ACT_FLAGS]) | ^~~~~~~~~~~~~ | TCA_ROOT_FLAGS 914 | u8 hw_stats = TCA_ACT_HW_STATS_ANY; | ^~~~~~~~ 913 | struct nla_bitfield32 flags = { 0, 0 }; | ^~~~~ cc1: some warnings being treated as errors vim +914 net/sched/act_api.c 906 907 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, 908 struct nlattr *nla, struct nlattr *est, 909 char *name, int ovr, int bind, 910 struct tc_action_ops *a_o, bool rtnl_held, 911 struct netlink_ext_ack *extack) 912 { 915 struct nlattr *tb[TCA_ACT_MAX + 1]; 916 struct tc_cookie *cookie = NULL; 917 struct tc_action *a; 918 int err; 919 920 /* backward compatibility for policer */ 921 if (name == NULL) { 922 err = nla_parse_nested_deprecated(tb, TCA_ACT_MAX, nla, 923 tcf_action_policy, extack); 924 if (err < 0) 925 return ERR_PTR(err); 926 if (tb[TCA_ACT_COOKIE]) { 927 cookie = nla_memdup_cookie(tb); 928 if (!cookie) { 929 NL_SET_ERR_MSG(extack, "No memory to generate TC cookie"); 930 err = -ENOMEM; 931 goto err_out; 932 } 933 } 936 flags = nla_get_bitfield32(tb[TCA_ACT_FLAGS]); 937 938 err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind, 939 rtnl_held, tp, extack); 940 } else { 941 err = a_o->init(net, nla, est, &a, ovr, bind, rtnl_held, 942 tp, extack); 943 } 944 if (err < 0) 945 goto err_out; 946 947 if (!name && tb[TCA_ACT_COOKIE]) 948 tcf_set_action_cookie(&a->act_cookie, cookie); 949 950 /* module count goes up only when brand new policy is created 951 * if it exists and is only bound to in a_o->init() then 952 * ACT_P_CREATED is not returned (a zero is). 953 */ 954 if (err != ACT_P_CREATED) 955 module_put(a_o->owner); 956 957 return a; 958 959 err_out: 960 if (cookie) { 961 kfree(cookie->data); 962 kfree(cookie); 963 } 964 return ERR_PTR(err); 965 } 966 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org