Hi Alexey, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on kselftest/next] [also build test WARNING on linux/master linus/master hnaz-linux-mm/master v5.11-rc3 next-20210115] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Alexey-Gladkov/Count-rlimits-in-... base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next config: arc-randconfig-r011-20210115 (attached as .config) compiler: arc-elf-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://github.com/0day-ci/linux/commit/14c3c8a27f70d6d6b7c1d64a9af899eb8... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alexey-Gladkov/Count-rlimits-in-each-user-namespace/20210115-230051 git checkout 14c3c8a27f70d6d6b7c1d64a9af899eb80169495 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): kernel/cred.c: In function '__put_cred': 149 | if (cred->ucounts); | ^ vim +/if +149 kernel/cred.c 127 128 /** 129 * __put_cred - Destroy a set of credentials 130 * @cred: The record to release 131 * 132 * Destroy a set of credentials on which no references remain. 133 */ 134 void __put_cred(struct cred *cred) 135 { 136 kdebug("__put_cred(%p{%d,%d})", cred, 137 atomic_read(&cred->usage), 138 read_cred_subscribers(cred)); 139 140 BUG_ON(atomic_read(&cred->usage) != 0); 141 #ifdef CONFIG_DEBUG_CREDENTIALS 142 BUG_ON(read_cred_subscribers(cred) != 0); 143 cred->magic = CRED_MAGIC_DEAD; 144 cred->put_addr = __builtin_return_address(0); 145 #endif 146 BUG_ON(cred == current->cred); 147 BUG_ON(cred == current->real_cred); 148 150 BUG_ON(cred->ucounts->ns != cred->user_ns); 151 152 if (cred->non_rcu) 153 put_cred_rcu(&cred->rcu); 154 else 155 call_rcu(&cred->rcu, put_cred_rcu); 156 } 157 EXPORT_SYMBOL(__put_cred); 158 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org