tree: https://github.com/rgushchin/linux.git kmem_reparent.2 head: 3239ac71c274fa41b651ec92e43cbb18cc5b8112 commit: e0477c3bfa481937438fa6733bcb70e1d8f3d1a9 [253/327] fs/binfmt_elf.c: move brk out of mmap when doing direct loader exec config: x86_64-randconfig-h1-201915 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: git checkout e0477c3bfa481937438fa6733bcb70e1d8f3d1a9 # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> Note: the rgushchin/kmem_reparent.2 HEAD 3239ac71c274fa41b651ec92e43cbb18cc5b8112 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): fs/binfmt_elf.c: In function 'load_elf_binary': >> fs/binfmt_elf.c:1140:7: error: 'elf_interpreter' undeclared (first use in this function); did you mean 'interpreter'? if (!elf_interpreter) ^~~~~~~~~~~~~~~ interpreter fs/binfmt_elf.c:1140:7: note: each undeclared identifier is reported only once for each function it appears in vim +1140 fs/binfmt_elf.c 1122 1123 retval = create_elf_tables(bprm, &loc->elf_ex, 1124 load_addr, interp_load_addr); 1125 if (retval < 0) 1126 goto out; 1127 /* N.B. passed_fileno might not be initialized? */ 1128 current->mm->end_code = end_code; 1129 current->mm->start_code = start_code; 1130 current->mm->start_data = start_data; 1131 current->mm->end_data = end_data; 1132 current->mm->start_stack = bprm->p; 1133 1134 /* 1135 * When executing a loader directly (ET_DYN without Interp), move 1136 * the brk area out of the mmap region (since it grows up, and may 1137 * collide early with the stack growing down), and into the unused 1138 * ELF_ET_DYN_BASE region. 1139 */ > 1140 if (!elf_interpreter) 1141 current->mm->brk = current->mm->start_brk = ELF_ET_DYN_BASE; 1142 1143 if ((current->flags & PF_RANDOMIZE) && (randomize_va_space > 1)) { 1144 current->mm->brk = current->mm->start_brk = 1145 arch_randomize_brk(current->mm); 1146 #ifdef compat_brk_randomized 1147 current->brk_randomized = 1; 1148 #endif 1149 } 1150 1151 if (current->personality & MMAP_PAGE_ZERO) { 1152 /* Why this, you ask??? Well SVr4 maps page 0 as read-only, 1153 and some applications "depend" upon this behavior. 1154 Since we do not have the power to recompile these, we 1155 emulate the SVr4 behavior. Sigh. */ 1156 error = vm_mmap(NULL, 0, PAGE_SIZE, PROT_READ | PROT_EXEC, 1157 MAP_FIXED | MAP_PRIVATE, 0); 1158 } 1159 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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