tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git pks/v0.0 head: eed09ce6622d550ab5b10a86e7dd6c2ff6bd59d9 commit: 79a4c0d7e9449140c2ec65703a0f3b38f4d28aad [10/27] x86/pks: Add PKS test code config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git/commit/?id... git remote add rppt https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git git fetch --no-tags rppt pks/v0.0 git checkout 79a4c0d7e9449140c2ec65703a0f3b38f4d28aad # save the attached .config to linux build tree make W=1 ARCH=x86_64 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 >>): * pks_test_callback() is exported so that the fault handler can detect vim +154 lib/pks/pks_test.c 152 153 /** 155 * and report back status of intentional faults. 156 * 157 * NOTE: It clears the protection key from the page such that the fault handler 158 * will not re-trigger. 159 */ 160 bool pks_test_callback(struct pt_regs *regs) 161 { 162 struct extended_pt_regs *ept_regs = extended_pt_regs(regs); 163 bool armed = (test_armed_key != 0); 164 165 if (test_exception_ctx) { 166 check_exception(ept_regs->thread_pkrs); 167 /* 168 * Stop this check directly within the exception because the 169 * fault handler clean up code will call again while checking 170 * the PMD entry and there is no need to check this again. 171 */ 172 test_exception_ctx = NULL; 173 } 174 175 if (armed) { 176 /* Enable read and write to stop faults */ 177 ept_regs->thread_pkrs = update_pkey_val(ept_regs->thread_pkrs, 178 test_armed_key, 0); 179 fault_cnt++; 180 } 181 182 return armed; 183 } 184 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org