tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.4 head: 72cf0d8c01acc7aa359dae193ac04980479036f2 commit: 85fb22459cd84a3cee1a1d36a32ba119f7b1c5e7 [26/47] cgroup-v1: add disabled controller check in cgroup1_parse_param() config: arm64-randconfig-s032-20210216 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-215-g0fb77bb6-dirty # 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 85fb22459cd84a3cee1a1d36a32ba119f7b1c5e7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/cgroup/cgroup-v1.c: In function 'cgroup1_parse_param': 927 | return invalfc(fc, "Disabled controller '%s'", | ^~~~~~~ | invalf cc1: some warnings being treated as errors vim +927 kernel/cgroup/cgroup-v1.c 906 907 int cgroup1_parse_param(struct fs_context *fc, struct fs_parameter *param) 908 { 909 struct cgroup_fs_context *ctx = cgroup_fc2context(fc); 910 struct cgroup_subsys *ss; 911 struct fs_parse_result result; 912 int opt, i; 913 914 opt = fs_parse(fc, &cgroup1_fs_parameters, param, &result); 915 if (opt == -ENOPARAM) { 916 if (strcmp(param->key, "source") == 0) { 917 if (fc->source) 918 return invalf(fc, "Multiple sources not supported"); 919 fc->source = param->string; 920 param->string = NULL; 921 return 0; 922 } 923 for_each_subsys(ss, i) { 924 if (strcmp(param->key, ss->legacy_name)) 925 continue; 926 if (!cgroup_ssid_enabled(i) || cgroup1_ssid_disabled(i)) 928 param->key); 929 ctx->subsys_mask |= (1 << i); 930 return 0; 931 } 932 return cg_invalf(fc, "cgroup1: Unknown subsys name '%s'", param->key); 933 } 934 if (opt < 0) 935 return opt; 936 937 switch (opt) { 938 case Opt_none: 939 /* Explicitly have no subsystems */ 940 ctx->none = true; 941 break; 942 case Opt_all: 943 ctx->all_ss = true; 944 break; 945 case Opt_noprefix: 946 ctx->flags |= CGRP_ROOT_NOPREFIX; 947 break; 948 case Opt_clone_children: 949 ctx->cpuset_clone_children = true; 950 break; 951 case Opt_cpuset_v2_mode: 952 ctx->flags |= CGRP_ROOT_CPUSET_V2_MODE; 953 break; 954 case Opt_xattr: 955 ctx->flags |= CGRP_ROOT_XATTR; 956 break; 957 case Opt_release_agent: 958 /* Specifying two release agents is forbidden */ 959 if (ctx->release_agent) 960 return cg_invalf(fc, "cgroup1: release_agent respecified"); 961 ctx->release_agent = param->string; 962 param->string = NULL; 963 break; 964 case Opt_name: 965 /* blocked by boot param? */ 966 if (cgroup_no_v1_named) 967 return -ENOENT; 968 /* Can't specify an empty name */ 969 if (!param->size) 970 return cg_invalf(fc, "cgroup1: Empty name"); 971 if (param->size > MAX_CGROUP_ROOT_NAMELEN - 1) 972 return cg_invalf(fc, "cgroup1: Name too long"); 973 /* Must match [\w.-]+ */ 974 for (i = 0; i < param->size; i++) { 975 char c = param->string[i]; 976 if (isalnum(c)) 977 continue; 978 if ((c == '.') || (c == '-') || (c == '_')) 979 continue; 980 return cg_invalf(fc, "cgroup1: Invalid name"); 981 } 982 /* Specifying two names is forbidden */ 983 if (ctx->name) 984 return cg_invalf(fc, "cgroup1: name respecified"); 985 ctx->name = param->string; 986 param->string = NULL; 987 break; 988 } 989 return 0; 990 } 991 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org