Hi Thadeu, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v4.19 next-20181102] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Thadeu-Lima-de-Souza-Cascardo/lockdown-allow-kexec_file-of-unsigned-images-when-not-under-lockdown/20181102-123838 config: x86_64-randconfig-x002-201843 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All error/warnings (new ones prefixed by >>): In file included from include/asm-generic/bug.h:5:0, from arch/x86/include/asm/bug.h:47, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/mm.h:9, from kernel/kexec_file.c:15: kernel/kexec_file.c: In function 'kimage_file_prepare_segments': >> kernel/kexec_file.c:222:13: error: implicit declaration of function 'kernel_is_locked_down'; did you mean 'kernel_sigaction'? [-Werror=implicit-function-declaration] if (ret && kernel_is_locked_down("kexec of unsigned images")) ^ include/linux/compiler.h:58:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ >> kernel/kexec_file.c:222:2: note: in expansion of macro 'if' if (ret && kernel_is_locked_down("kexec of unsigned images")) ^~ cc1: some warnings being treated as errors vim +222 kernel/kexec_file.c 182 183 /* 184 * In file mode list of segments is prepared by kernel. Copy relevant 185 * data from user space, do error checking, prepare segment list 186 */ 187 static int 188 kimage_file_prepare_segments(struct kimage *image, int kernel_fd, int initrd_fd, 189 const char __user *cmdline_ptr, 190 unsigned long cmdline_len, unsigned flags) 191 { 192 int ret = 0; 193 void *ldata; 194 loff_t size; 195 196 ret = kernel_read_file_from_fd(kernel_fd, &image->kernel_buf, 197 &size, INT_MAX, READING_KEXEC_IMAGE); 198 if (ret) 199 return ret; 200 image->kernel_buf_len = size; 201 202 /* IMA needs to pass the measurement list to the next kernel. */ 203 ima_add_kexec_buffer(image); 204 205 /* Call arch image probe handlers */ 206 ret = arch_kexec_kernel_image_probe(image, image->kernel_buf, 207 image->kernel_buf_len); 208 if (ret) 209 goto out; 210 211 #ifdef CONFIG_KEXEC_VERIFY_SIG 212 ret = arch_kexec_kernel_verify_sig(image, image->kernel_buf, 213 image->kernel_buf_len); 214 if (ret) { 215 pr_debug("kernel signature verification failed.\n"); 216 } else { 217 pr_debug("kernel signature verification successful.\n"); 218 } 219 #elif 220 ret = -EPERM; 221 #endif > 222 if (ret && kernel_is_locked_down("kexec of unsigned images")) 223 goto out; 224 else 225 ret = 0; 226 227 /* It is possible that there no initramfs is being loaded */ 228 if (!(flags & KEXEC_FILE_NO_INITRAMFS)) { 229 ret = kernel_read_file_from_fd(initrd_fd, &image->initrd_buf, 230 &size, INT_MAX, 231 READING_KEXEC_INITRAMFS); 232 if (ret) 233 goto out; 234 image->initrd_buf_len = size; 235 } 236 237 if (cmdline_len) { 238 image->cmdline_buf = memdup_user(cmdline_ptr, cmdline_len); 239 if (IS_ERR(image->cmdline_buf)) { 240 ret = PTR_ERR(image->cmdline_buf); 241 image->cmdline_buf = NULL; 242 goto out; 243 } 244 245 image->cmdline_buf_len = cmdline_len; 246 247 /* command line should be a string with last byte null */ 248 if (image->cmdline_buf[cmdline_len - 1] != '\0') { 249 ret = -EINVAL; 250 goto out; 251 } 252 } 253 254 /* Call arch image load handlers */ 255 ldata = arch_kexec_kernel_image_load(image); 256 257 if (IS_ERR(ldata)) { 258 ret = PTR_ERR(ldata); 259 goto out; 260 } 261 262 image->image_loader_data = ldata; 263 out: 264 /* In case of error, free up all allocated memory in this function */ 265 if (ret) 266 kimage_file_post_load_cleanup(image); 267 return ret; 268 } 269 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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