Re: [PATCH v1 7/8] LSM: Create lsm_module_list system call

[kernel test robot <lkp@intel.com>]

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Hi Casey,

I love your patch! Yet something to improve:

[auto build test ERROR on kees/for-next/hardening]
[also build test ERROR on pcmoore-selinux/next acme/perf/core linus/master v6.1-rc2 next-20221026]
[cannot apply to tip/perf/core]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Casey-Schaufler/LSM-Identify-modules-by-more-than-name/20221026-034541
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
patch link:    https://lore.kernel.org/r/20221025184519.13231-8-casey%40schaufler-ca.com
patch subject: [PATCH v1 7/8] LSM: Create lsm_module_list system call
config: arm-randconfig-r031-20221025 (attached as .config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/intel-lab-lkp/linux/commit/e4fdffbcada3e48a7f4049e4c872642a1fed8f04
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Casey-Schaufler/LSM-Identify-modules-by-more-than-name/20221026-034541
        git checkout e4fdffbcada3e48a7f4049e4c872642a1fed8f04
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from security/lsm_syscalls.c:15:
   include/linux/syscalls.h:1060:42: warning: declaration of 'struct lsm_ctx' will not be visible outside of this function [-Wvisibility]
   asmlinkage long sys_lsm_self_attr(struct lsm_ctx *ctx, size_t *size, int flags);
                                            ^
   security/lsm_syscalls.c:47:1: error: conflicting types for 'sys_lsm_self_attr'
   SYSCALL_DEFINE3(lsm_self_attr,
   ^
   include/linux/syscalls.h:220:36: note: expanded from macro 'SYSCALL_DEFINE3'
   #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
                                      ^
   include/linux/syscalls.h:229:2: note: expanded from macro 'SYSCALL_DEFINEx'
           __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
           ^
   include/linux/syscalls.h:243:18: note: expanded from macro '__SYSCALL_DEFINEx'
           asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))       \
                           ^
   <scratch space>:65:1: note: expanded from here
   sys_lsm_self_attr
   ^
   include/linux/syscalls.h:1060:17: note: previous declaration is here
   asmlinkage long sys_lsm_self_attr(struct lsm_ctx *ctx, size_t *size, int flags);
                   ^
>> security/lsm_syscalls.c:171:1: error: conflicting types for 'sys_lsm_module_list'
   SYSCALL_DEFINE3(lsm_module_list,
   ^
   include/linux/syscalls.h:220:36: note: expanded from macro 'SYSCALL_DEFINE3'
   #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
                                      ^
   include/linux/syscalls.h:229:2: note: expanded from macro 'SYSCALL_DEFINEx'
           __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
           ^
   include/linux/syscalls.h:243:18: note: expanded from macro '__SYSCALL_DEFINEx'
           asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))       \
                           ^
   <scratch space>:104:1: note: expanded from here
   sys_lsm_module_list
   ^
   include/linux/syscalls.h:1061:17: note: previous declaration is here
   asmlinkage long sys_lsm_module_list(unsigned int *ids, size_t *size, int flags);
                   ^
   1 warning and 2 errors generated.


vim +/sys_lsm_module_list +171 security/lsm_syscalls.c

   157	
   158	/**
   159	 * lsm_module_list - Return a list of the active security modules
   160	 * @ids: the LSM module ids
   161	 * @size: size of @ids, updated on return
   162	 * @flags: reserved for future use, must be zero
   163	 *
   164	 * Returns a list of the active LSM ids. On success this function
   165	 * returns the number of @ids array elements. This value may be zero
   166	 * if there are no LSMs active. If @size is insufficient to contain
   167	 * the return data -E2BIG is returned and @size is set to the minimum
   168	 * required size. In all other cases a negative value indicating the
   169	 * error is returned.
   170	 */
 > 171	SYSCALL_DEFINE3(lsm_module_list,

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