[driver-core:debugfs_cleanup 7/7] fs/sysfs/file.c:397:8: warning: variable 'uid' is uninitialized when used here

[driver-core:debugfs_cleanup 7/7] fs/sysfs/file.c:397:8: warning: variable 'uid' is uninitialized when used here

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git debugfs_cleanup
head:   2929d17b58d02dcf52d0345fa966c616e09a5afa
commit: 2929d17b58d02dcf52d0345fa966c616e09a5afa [7/7] sysfs: do not create empty directories if no attributes are present
config: i386-randconfig-012-20230831 (https://download.01.org/0day-ci/archive/20230831/202308312145.bv4S52ys-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230831/202308312145.bv4S52ys-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308312145.bv4S52ys-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/sysfs/file.c:397:8: warning: variable 'uid' is uninitialized when used here [-Wuninitialized]
                                             uid, gid, kobj, NULL);
                                             ^~~
   fs/sysfs/file.c:383:2: note: variable 'uid' is declared here
           kuid_t uid;
           ^
>> fs/sysfs/file.c:397:13: warning: variable 'gid' is uninitialized when used here [-Wuninitialized]
                                             uid, gid, kobj, NULL);
                                                  ^~~
   fs/sysfs/file.c:384:2: note: variable 'gid' is declared here
           kgid_t gid;
           ^
   2 warnings generated.


vim +/uid +397 fs/sysfs/file.c

   372	
   373	/**
   374	 * sysfs_add_file_to_group - add an attribute file to a pre-existing group.
   375	 * @kobj: object we're acting for.
   376	 * @attr: attribute descriptor.
   377	 * @group: group name.
   378	 */
   379	int sysfs_add_file_to_group(struct kobject *kobj,
   380			const struct attribute *attr, const char *group)
   381	{
   382		struct kernfs_node *parent;
   383		kuid_t uid;
   384		kgid_t gid;
   385		int error;
   386	
   387		if (group) {
   388			parent = kernfs_find_and_get(kobj->sd, group);
   389		} else {
   390			parent = kobj->sd;
   391			kernfs_get(parent);
   392		}
   393	
   394		if (!parent) {
   395			parent = kernfs_create_dir_ns(kobj->sd, group,
   396						  S_IRWXU | S_IRUGO | S_IXUGO,
 > 397						  uid, gid, kobj, NULL);
   398			if (IS_ERR(parent)) {
   399				if (PTR_ERR(parent) == -EEXIST)
   400					sysfs_warn_dup(kobj->sd, group);
   401				return PTR_ERR(parent);
   402			}
   403	
   404			kernfs_get(parent);
   405		}
   406	
   407		kobject_get_ownership(kobj, &uid, &gid);
   408		error = sysfs_add_file_mode_ns(parent, attr, attr->mode, uid, gid,
   409					       NULL);
   410		kernfs_put(parent);
   411	
   412		return error;
   413	}
   414	EXPORT_SYMBOL_GPL(sysfs_add_file_to_group);
   415	

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