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Date:   Tue, 5 Dec 2023 17:50:24 +0800
From:   kernel test robot <lkp@intel.com>
To:     Thomas =?iso-8859-1?Q?Wei=DFschuh?= <linux@weissschuh.net>,
        Kees Cook <keescook@chromium.org>,
        "Gustavo A. R. Silva" <gustavoars@kernel.org>,
        Luis Chamberlain <mcgrof@kernel.org>,
        Iurii Zaikin <yzaikin@google.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Joel Granados <j.granados@samsung.com>
Cc:     oe-kbuild-all@lists.linux.dev, linux-hardening@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        Thomas =?iso-8859-1?Q?Wei=DFschuh?= <linux@weissschuh.net>
Subject: Re: [PATCH v2 12/18] sysctl: treewide: constify the ctl_table
 argument of handlers
Message-ID: <202312051727.wW4EJo6e-lkp@intel.com>
References: <20231204-const-sysctl-v2-12-7a5060b11447@weissschuh.net>
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In-Reply-To: <20231204-const-sysctl-v2-12-7a5060b11447@weissschuh.net>
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Hi Thomas,

kernel test robot noticed the following build errors:

[auto build test ERROR on netfilter-nf/main]
[also build test ERROR on akpm-mm/mm-everything linus/master v6.7-rc4]
[cannot apply to nf-next/master next-20231205]
[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/Thomas-Wei-schuh/sysctl-delete-unused-define-SYSCTL_PERM_EMPTY_DIR/20231204-165306
base:   git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git main
patch link:    https://lore.kernel.org/r/20231204-const-sysctl-v2-12-7a5060b11447%40weissschuh.net
patch subject: [PATCH v2 12/18] sysctl: treewide: constify the ctl_table argument of handlers
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20231205/202312051727.wW4EJo6e-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231205/202312051727.wW4EJo6e-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/202312051727.wW4EJo6e-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/s390/appldata/appldata_base.c: In function 'appldata_register_ops':
>> arch/s390/appldata/appldata_base.c:363:40: error: assignment to 'int (*)(const struct ctl_table *, int,  void *, size_t *, loff_t *)' {aka 'int (*)(const struct ctl_table *, int,  void *, long unsigned int *, long long int *)'} from incompatible pointer type 'int (*)(struct ctl_table *, int,  void *, size_t *, loff_t *)' {aka 'int (*)(struct ctl_table *, int,  void *, long unsigned int *, long long int *)'} [-Werror=incompatible-pointer-types]
     363 |         ops->ctl_table[0].proc_handler = appldata_generic_handler;
         |                                        ^
   cc1: some warnings being treated as errors


vim +363 arch/s390/appldata/appldata_base.c

^1da177e4c3f41 Linus Torvalds   2005-04-16  340  
^1da177e4c3f41 Linus Torvalds   2005-04-16  341  
^1da177e4c3f41 Linus Torvalds   2005-04-16  342  /************************* module-ops management *****************************/
^1da177e4c3f41 Linus Torvalds   2005-04-16  343  /*
^1da177e4c3f41 Linus Torvalds   2005-04-16  344   * appldata_register_ops()
^1da177e4c3f41 Linus Torvalds   2005-04-16  345   *
^1da177e4c3f41 Linus Torvalds   2005-04-16  346   * update ops list, register /proc/sys entries
^1da177e4c3f41 Linus Torvalds   2005-04-16  347   */
^1da177e4c3f41 Linus Torvalds   2005-04-16  348  int appldata_register_ops(struct appldata_ops *ops)
^1da177e4c3f41 Linus Torvalds   2005-04-16  349  {
13f8b7c5e6fa13 Roel Kluin       2008-10-28  350  	if (ops->size > APPLDATA_MAX_REC_SIZE)
37e3a6ac5a3046 Heiko Carstens   2007-11-20  351  		return -EINVAL;
^1da177e4c3f41 Linus Torvalds   2005-04-16  352  
fdd9da76e2dec0 Joel Granados    2023-10-02  353  	ops->ctl_table = kcalloc(1, sizeof(struct ctl_table), GFP_KERNEL);
37e3a6ac5a3046 Heiko Carstens   2007-11-20  354  	if (!ops->ctl_table)
^1da177e4c3f41 Linus Torvalds   2005-04-16  355  		return -ENOMEM;
^1da177e4c3f41 Linus Torvalds   2005-04-16  356  
b1ad171efa089a Gerald Schaefer  2009-04-23  357  	mutex_lock(&appldata_ops_mutex);
^1da177e4c3f41 Linus Torvalds   2005-04-16  358  	list_add(&ops->list, &appldata_ops_list);
b1ad171efa089a Gerald Schaefer  2009-04-23  359  	mutex_unlock(&appldata_ops_mutex);
^1da177e4c3f41 Linus Torvalds   2005-04-16  360  
7db12246306ea6 Luis Chamberlain 2023-03-10  361  	ops->ctl_table[0].procname = ops->name;
7db12246306ea6 Luis Chamberlain 2023-03-10  362  	ops->ctl_table[0].mode = S_IRUGO | S_IWUSR;
7db12246306ea6 Luis Chamberlain 2023-03-10 @363  	ops->ctl_table[0].proc_handler = appldata_generic_handler;
7db12246306ea6 Luis Chamberlain 2023-03-10  364  	ops->ctl_table[0].data = ops;
^1da177e4c3f41 Linus Torvalds   2005-04-16  365  
9edbfe92a0a135 Joel Granados    2023-08-09  366  	ops->sysctl_header = register_sysctl_sz(appldata_proc_name, ops->ctl_table, 1);
37e3a6ac5a3046 Heiko Carstens   2007-11-20  367  	if (!ops->sysctl_header)
37e3a6ac5a3046 Heiko Carstens   2007-11-20  368  		goto out;
^1da177e4c3f41 Linus Torvalds   2005-04-16  369  	return 0;
37e3a6ac5a3046 Heiko Carstens   2007-11-20  370  out:
b1ad171efa089a Gerald Schaefer  2009-04-23  371  	mutex_lock(&appldata_ops_mutex);
37e3a6ac5a3046 Heiko Carstens   2007-11-20  372  	list_del(&ops->list);
b1ad171efa089a Gerald Schaefer  2009-04-23  373  	mutex_unlock(&appldata_ops_mutex);
37e3a6ac5a3046 Heiko Carstens   2007-11-20  374  	kfree(ops->ctl_table);
37e3a6ac5a3046 Heiko Carstens   2007-11-20  375  	return -ENOMEM;
^1da177e4c3f41 Linus Torvalds   2005-04-16  376  }
^1da177e4c3f41 Linus Torvalds   2005-04-16  377  

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