TO: Kristen C Accardi <kristen.c.accardi(a)intel.com&gt; tree: https://github.com/kaccardi/linux.git fg-kaslr head: 196a39d163e9de947b38e7013d8c46c520adf0ec commit: 7a7324f8e62c789f600eaa718c3ed1588d57f9d2 [4/10] x86: Makefile: Add build and config option for CONFIG_FG_KASLR config: x86_64-allmodconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 487ca07fcc75d52755c9fe2ee05bcb3b6eeeec44) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 7a7324f8e62c789f600eaa718c3ed1588d57f9d2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the kaccardi/fg-kaslr HEAD 196a39d163e9de947b38e7013d8c46c520adf0ec builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>, old ones prefixed by <<): terminate called after throwing an instance of 'std::system_error' what(): Resource temporarily unavailable PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace. #0 0x000055dc2da6190a llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/opt/cross/clang-487ca07fcc/bin/lld+0x8c390a) #1 0x000055dc2da5f815 llvm::sys::RunSignalHandlers() (/opt/cross/clang-487ca07fcc/bin/lld+0x8c1815) #2 0x000055dc2da5f932 SignalHandler(int) (/opt/cross/clang-487ca07fcc/bin/lld+0x8c1932) #3 0x00007fdeb566d730 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12730) #4 0x00007fdeb519f7bb raise (/lib/x86_64-linux-gnu/libc.so.6+0x377bb) #5 0x00007fdeb518a535 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22535) #6 0x00007fdeb5554983 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x8c983) #7 0x00007fdeb555a8c6 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x928c6) #8 0x00007fdeb555a901 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x92901) #9 0x00007fdeb555ab34 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x92b34) #10 0x00007fdeb5556a55 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x8ea55) #11 0x00007fdeb5583dc9 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0xbbdc9) #12 0x000055dc3036f834 std::thread::_State_impl<std::_Bind_simple<llvm::parallel::detail::(anonymous namespace)::ThreadPoolExecutor::ThreadPoolExecutor(llvm::ThreadPoolStrategy)::'lambda'() ()> >::_M_run() (/opt/cross/clang-487ca07fcc/bin/lld+0x31d1834) #13 0x00007fdeb5583b2f (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0xbbb2f) #14 0x00007fdeb5662fa3 start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x7fa3) #15 0x00007fdeb52614cf clone (/lib/x86_64-linux-gnu/libc.so.6+0xf94cf) /bin/bash: line 1: 133090 Aborted ld.lld -m elf_x86_64 -z max-page-size=0x200000 -r -o drivers/staging/speakup/speakup.o drivers/staging/speakup/buffers.o drivers/staging/speakup/devsynth.o drivers/staging/speakup/i18n.o drivers/staging/speakup/fakekey.o drivers/staging/speakup/main.o drivers/staging/speakup/keyhelp.o drivers/staging/speakup/kobjects.o drivers/staging/speakup/selection.o drivers/staging/speakup/serialio.o drivers/staging/speakup/spk_ttyio.o drivers/staging/speakup/synth.o drivers/staging/speakup/thread.o drivers/staging/speakup/varhandlers.o --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org