linux-kernel - Re: [PATCH] lsm: constify 'mnt_opts' parameter in security_free_mnt

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Date:   Wed, 13 Sep 2023 18:18:52 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Khadija Kamran <kamrankhadijadj@...il.com>
Cc:     kernel test robot <lkp@...el.com>,
        Casey Schaufler <casey@...aufler-ca.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Stephen Smalley <stephen.smalley.work@...il.com>,
        Eric Paris <eparis@...isplace.org>, selinux@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org, ztarkhani@...rosoft.com,
        alison.schofield@...el.com, llvm@...ts.linux.dev,
        oe-kbuild-all@...ts.linux.dev
Subject: Re: [PATCH] lsm: constify 'mnt_opts' parameter in security_free_mnt_opts()

On Wed, Aug 23, 2023 at 1:22 PM kernel test robot <lkp@...el.com> wrote:
>
> Hi Khadija,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on pcmoore-selinux/next]
> [also build test ERROR on pcmoore-audit/next linus/master v6.5-rc7 next-20230823]
> [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/Khadija-Kamran/lsm-constify-mnt_opts-parameter-in-security_free_mnt_opts/20230823-170310
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git next
> patch link:    https://lore.kernel.org/r/ZOXG%2FVVC1XRc7TtI%40gmail.com
> patch subject: [PATCH] lsm: constify 'mnt_opts' parameter in security_free_mnt_opts()
> config: riscv-randconfig-001-20230823 (https://download.01.org/0day-ci/archive/20230824/202308240128.Gsn0b0Fv-lkp@intel.com/config)
> compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
> reproduce: (https://download.01.org/0day-ci/archive/20230824/202308240128.Gsn0b0Fv-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@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202308240128.Gsn0b0Fv-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
> >> fs/btrfs/super.c:1523:25: error: passing 'void **' to parameter of type 'const void **' discards qualifiers in nested pointer types [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
>            security_free_mnt_opts(&new_sec_opts);
>                                   ^~~~~~~~~~~~~
>    include/linux/security.h:301:42: note: passing argument to parameter 'mnt_opts' here
>    void security_free_mnt_opts(const void **mnt_opts);
>                                             ^
>    fs/btrfs/super.c:1536:25: error: passing 'void **' to parameter of type 'const void **' discards qualifiers in nested pointer types [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
>            security_free_mnt_opts(&new_sec_opts);
>                                   ^~~~~~~~~~~~~
>    include/linux/security.h:301:42: note: passing argument to parameter 'mnt_opts' here
>    void security_free_mnt_opts(const void **mnt_opts);
>                                             ^
>    fs/btrfs/super.c:1699:26: error: passing 'void **' to parameter of type 'const void **' discards qualifiers in nested pointer types [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
>                    security_free_mnt_opts(&new_sec_opts);
>                                           ^~~~~~~~~~~~~
>    include/linux/security.h:301:42: note: passing argument to parameter 'mnt_opts' here
>    void security_free_mnt_opts(const void **mnt_opts);
>                                             ^
>    3 errors generated.

Hi Khadija, can you check to see if these errors can be resolved?

-- 
paul-moore.com