Hi Stefan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on zohar-integrity/next-integrity] [also build test WARNING on linux/master linus/master v5.16-rc5] [cannot apply to jmorris-security/next-testing next-20211215] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Stefan-Berger/ima-Namespace-IMA-... base: https://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git next-integrity config: mips-buildonly-randconfig-r006-20211216 (https://download.01.org/0day-ci/archive/20211216/202112161948.NK58RGVT-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dd245bab9fbb364faa1581e4f92ba3119a872fba) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://github.com/0day-ci/linux/commit/bc2f1f683efbf2ad7b955fd4afc788616... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stefan-Berger/ima-Namespace-IMA-with-audit-support-in-IMA-ns/20211216-134611 git checkout bc2f1f683efbf2ad7b955fd4afc78861609eff4b # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash security/integrity/ima/ 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 >>): int ima_fs_ns_init(struct user_namespace *user_ns, struct dentry *root) ^ security/integrity/ima/ima_fs.c:451:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int ima_fs_ns_init(struct user_namespace *user_ns, struct dentry *root) ^ static 1 warning generated. vim +/ima_fs_ns_init +451 security/integrity/ima/ima_fs.c 450 452 { 453 struct ima_namespace *ns = user_ns->ima_ns; 454 struct dentry *int_dir; 455 struct dentry *ima_dir = NULL; 456 struct dentry *ima_symlink = NULL; 457 struct dentry *binary_runtime_measurements = NULL; 458 struct dentry *ascii_runtime_measurements = NULL; 459 struct dentry *runtime_measurements_count = NULL; 460 struct dentry *violations = NULL; 461 462 /* FIXME: update when evm and integrity are namespaced */ 463 if (user_ns != &init_user_ns) { 464 int_dir = 465 securityfs_create_dir("integrity", root); 466 if (IS_ERR(int_dir)) 467 return -1; 468 } else 469 int_dir = integrity_dir; 470 471 ima_dir = securityfs_create_dir("ima", int_dir); 472 if (IS_ERR(ima_dir)) 473 goto out; 474 475 ima_symlink = securityfs_create_symlink("ima", root, "integrity/ima", 476 NULL); 477 if (IS_ERR(ima_symlink)) 478 goto out; 479 480 binary_runtime_measurements = 481 securityfs_create_file("binary_runtime_measurements", 482 S_IRUSR | S_IRGRP, ima_dir, NULL, 483 &ima_measurements_ops); 484 if (IS_ERR(binary_runtime_measurements)) 485 goto out; 486 487 ascii_runtime_measurements = 488 securityfs_create_file("ascii_runtime_measurements", 489 S_IRUSR | S_IRGRP, ima_dir, NULL, 490 &ima_ascii_measurements_ops); 491 if (IS_ERR(ascii_runtime_measurements)) 492 goto out; 493 494 runtime_measurements_count = 495 securityfs_create_file("runtime_measurements_count", 496 S_IRUSR | S_IRGRP, ima_dir, NULL, 497 &ima_measurements_count_ops); 498 if (IS_ERR(runtime_measurements_count)) 499 goto out; 500 501 violations = 502 securityfs_create_file("violations", S_IRUSR | S_IRGRP, 503 ima_dir, NULL, &ima_htable_violations_ops); 504 if (IS_ERR(violations)) 505 goto out; 506 507 508 if (!ns->policy_dentry_removed) { 509 ns->policy_dentry = 510 securityfs_create_file("policy", POLICY_FILE_FLAGS, 511 ima_dir, NULL, 512 &ima_measure_policy_ops); 513 if (IS_ERR(ns->policy_dentry)) 514 goto out; 515 } 516 517 return 0; 518 out: 519 securityfs_remove(ns->policy_dentry); 520 securityfs_remove(violations); 521 securityfs_remove(runtime_measurements_count); 522 securityfs_remove(ascii_runtime_measurements); 523 securityfs_remove(binary_runtime_measurements); 524 securityfs_remove(ima_symlink); 525 securityfs_remove(ima_dir); 526 if (user_ns != &init_user_ns) 527 securityfs_remove(integrity_dir); 528 529 return -1; 530 } 531 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org