tree: https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git working-io_uring head: 1f25193a3f5495eefbc9826b1de1a008a2439351 commit: 1f25193a3f5495eefbc9826b1de1a008a2439351 [9/9] Smack: Brutalist io_uring support with debug config: x86_64-randconfig-r013-20210526 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 99155e913e9bad5f7f8a247f8bb3a3ff3da74af1) 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/pcmoore/selinux.git/commit/?id=1f25193a3f5495eefbc9826b1de1a008a2439351 git remote add pcmoore-selinux https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git git fetch --no-tags pcmoore-selinux working-io_uring git checkout 1f25193a3f5495eefbc9826b1de1a008a2439351 # 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@xxxxxxxxx> All warnings (new ones prefixed by >>): >> security/smack/smack_lsm.c:4702:5: warning: no previous prototype for function 'smack_uring_override_creds' [-Wmissing-prototypes] int smack_uring_override_creds(const struct cred *new) ^ security/smack/smack_lsm.c:4702:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int smack_uring_override_creds(const struct cred *new) ^ static >> security/smack/smack_lsm.c:4739:5: warning: no previous prototype for function 'smack_uring_sqpoll' [-Wmissing-prototypes] int smack_uring_sqpoll(void) ^ security/smack/smack_lsm.c:4739:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int smack_uring_sqpoll(void) ^ static 2 warnings generated. vim +/smack_uring_override_creds +4702 security/smack/smack_lsm.c 4693 4694 #ifdef CONFIG_IO_URING 4695 /** 4696 * smack_uring_override_creds - Is io_uring cred override allowed? 4697 * @new: the target creds 4698 * 4699 * Check to see if the current task is allowed to override it's credentials 4700 * to service an io_uring operation. 4701 */ > 4702 int smack_uring_override_creds(const struct cred *new) 4703 { 4704 struct task_smack *tsp = smack_cred(current_cred()); 4705 struct task_smack *nsp = smack_cred(new); 4706 4707 #if 1 4708 if (tsp->smk_task == nsp->smk_task) 4709 pr_info("%s: Smack matches %s\n", __func__, 4710 tsp->smk_task->smk_known); 4711 else 4712 pr_info("%s: Smack override check %s to %s\n", __func__, 4713 tsp->smk_task->smk_known, nsp->smk_task->smk_known); 4714 #endif 4715 /* 4716 * Allow the degenerate case where the new Smack value is 4717 * the same as the current Smack value. 4718 */ 4719 if (tsp->smk_task == nsp->smk_task) 4720 return 0; 4721 4722 #if 1 4723 pr_info("%s: Smack sqpoll %s\n", __func__, 4724 smack_privileged_cred(CAP_MAC_OVERRIDE, current_cred()) ? 4725 "ok by Smack" : "disallowed (No CAP_MAC_OVERRIDE)"); 4726 #endif 4727 if (smack_privileged_cred(CAP_MAC_OVERRIDE, current_cred())) 4728 return 0; 4729 4730 return -EPERM; 4731 } 4732 4733 /** 4734 * smack_uring_sqpoll - check if a io_uring polling thread can be created 4735 * 4736 * Check to see if the current task is allowed to create a new io_uring 4737 * kernel polling thread. 4738 */ > 4739 int smack_uring_sqpoll(void) 4740 { 4741 #if 1 4742 pr_info("%s: Smack new ring %s\n", __func__, 4743 smack_privileged_cred(CAP_MAC_ADMIN, current_cred()) ? 4744 "ok by Smack" : "disallowed (No CAP_MAC_ADMIN)"); 4745 #endif 4746 if (smack_privileged_cred(CAP_MAC_ADMIN, current_cred())) 4747 return 0; 4748 4749 return -EPERM; 4750 } 4751 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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