tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.14.y head: bb01d00d3d36750e338cb76df7febc1f725a1cdd commit: 236a45c27006a0c73f763240531a19a5fd6a5255 [9665/9999] x86, perf: Fix the dependency of the x86 insn decoder selftest config: i386-randconfig-r013-20210816 (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.14.y git checkout 236a45c27006a0c73f763240531a19a5fd6a5255 # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash 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 >>): Warning: c1db3cf2: 0f ff 8d 4a 1c 0f ff ud0 -0xf0e3b6(%ebp),%ecx Warning: objdump says 7 bytes, but insn_get_length() says 2 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org