tree: https://git.kernel.org/pub/scm/linux/kernel/git/zx2c4/wireguard-linux.git stable head: da063960365c1da4ff0375fdf51a3d5d3346d9a7 commit: da063960365c1da4ff0375fdf51a3d5d3346d9a7 [7/7] wireguard: allowedips: allocate nodes in kmem_cache config: x86_64-randconfig-a016-20210520 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project bf9ef3efaa99c02e7bfc4c57207301b8de39a278) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/zx2c4/wireguard-linux.git... git remote add zx2c4-wireguard-linux https://git.kernel.org/pub/scm/linux/kernel/git/zx2c4/wireguard-linux.git git fetch --no-tags zx2c4-wireguard-linux stable git checkout da063960365c1da4ff0375fdf51a3d5d3346d9a7 # 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; All warnings (new ones prefixed by >>): err_selftests: ^~~~~~~~~~~~~~ 1 warning generated. vim +/err_selftests +57 drivers/net/wireguard/main.c 19 20 static int __init mod_init(void) 21 { 22 int ret; 23 24 ret = wg_allowedips_slab_init(); 25 if (ret < 0) 26 goto err_allowedips; 27 28 #ifdef DEBUG 29 ret = -ENOTRECOVERABLE; 30 if (!wg_allowedips_selftest() || !wg_packet_counter_selftest() || 31 !wg_ratelimiter_selftest()) 32 goto err_selftests; 33 #endif 34 wg_noise_init(); 35 36 ret = wg_peer_init(); 37 if (ret < 0) 38 goto err_peer; 39 40 ret = wg_device_init(); 41 if (ret < 0) 42 goto err_device; 43 44 ret = wg_genetlink_init(); 45 if (ret < 0) 46 goto err_netlink; 47 48 pr_info("WireGuard " WIREGUARD_VERSION " loaded. See www.wireguard.com for information.\n"); 49 pr_info("Copyright (C) 2015-2019 Jason A. Donenfeld <Jason(a)zx2c4.com&gt;. All Rights Reserved.\n"); 50 51 return 0; 52 53 err_netlink: 54 wg_device_uninit(); 55 err_device: 56 wg_peer_uninit(); 58 err_peer: 59 wg_allowedips_slab_uninit(); 60 err_allowedips: 61 return ret; 62 } 63 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org