Re: [PATCH v2 1/3] sysctl: Allow change system v ipc sysctls inside ipc namespace

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

Hi Alexey,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on kees/for-next/pstore linus/master v6.0-rc6 next-20220920]
[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/Alexey-Gladkov/sysctl-Allow-change-system-v-ipc-sysctls-inside-ipc-namespace/20220921-030939
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
config: hexagon-randconfig-r041-20220921 (https://download.01.org/0day-ci/archive/20220921/202209211737.0Bu0F40t-lkp@intel.com/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
        # https://github.com/intel-lab-lkp/linux/commit/eb972fb9aad60123519d8dd32df26cb58985ce4a
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Alexey-Gladkov/sysctl-Allow-change-system-v-ipc-sysctls-inside-ipc-namespace/20220921-030939
        git checkout eb972fb9aad60123519d8dd32df26cb58985ce4a
        # 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=hexagon 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 >>):

>> ipc/ipc_sysctl.c:215:47: error: passing 'kgid_t' to parameter of incompatible type 'kgid_t *'; take the address with &
           ipc_set_ownership(head, table, &ns_root_uid, ns_root_gid);
                                                        ^~~~~~~~~~~
                                                        &
   ipc/ipc_sysctl.c:195:31: note: passing argument to parameter 'gid' here
                                 kuid_t *uid, kgid_t *gid)
                                                      ^
>> ipc/ipc_sysctl.c:225:13: error: call to undeclared function 'current_euid'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           if (uid_eq(current_euid(), ns_root_uid))
                      ^
   ipc/ipc_sysctl.c:225:13: note: did you mean 'current_work'?
   include/linux/workqueue.h:467:28: note: 'current_work' declared here
   extern struct work_struct *current_work(void);
                              ^
>> ipc/ipc_sysctl.c:225:13: error: passing 'int' to parameter of incompatible type 'kuid_t'
           if (uid_eq(current_euid(), ns_root_uid))
                      ^~~~~~~~~~~~~~
   include/linux/uidgid.h:61:34: note: passing argument to parameter 'left' here
   static inline bool uid_eq(kuid_t left, kuid_t right)
                                    ^
>> ipc/ipc_sysctl.c:228:11: error: call to undeclared function 'in_egroup_p'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           else if (in_egroup_p(ns_root_gid))
                    ^
   4 errors generated.


vim +215 ipc/ipc_sysctl.c

   206	
   207	static int ipc_permissions(struct ctl_table_header *head, struct ctl_table *table)
   208	{
   209		struct ipc_namespace *ns =
   210			container_of(head->set, struct ipc_namespace, ipc_set);
   211		int mode = table->mode;
   212		kuid_t ns_root_uid;
   213		kgid_t ns_root_gid;
   214	
 > 215		ipc_set_ownership(head, table, &ns_root_uid, ns_root_gid);
   216	
   217	#ifdef CONFIG_CHECKPOINT_RESTORE
   218		if (((table->data == &ns->ids[IPC_SEM_IDS].next_id) ||
   219		     (table->data == &ns->ids[IPC_MSG_IDS].next_id) ||
   220		     (table->data == &ns->ids[IPC_SHM_IDS].next_id)) &&
   221		    checkpoint_restore_ns_capable(ns->user_ns))
   222			mode = 0666;
   223		else
   224	#endif
 > 225		if (uid_eq(current_euid(), ns_root_uid))
   226			mode >>= 6;
   227	
 > 228		else if (in_egroup_p(ns_root_gid))
   229			mode >>= 3;
   230	
   231		mode &= 7;
   232	
   233		return (mode << 6) | (mode << 3) | mode;
   234	}
   235	

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