Re: [PATCH V2] SELinux: Check correct permissions for FS_IOC32_*

[kernel test robot <lkp@xxxxxxxxx>]

Hi Alfred,

kernel test robot noticed the following build errors:

[auto build test ERROR on 50a510a78287c15cee644f345ef8bac8977986a7]

url:    https://github.com/intel-lab-lkp/linux/commits/Alfred-Piccioni/SELinux-Check-correct-permissions-for-FS_IOC32_/20230906-200131
base:   50a510a78287c15cee644f345ef8bac8977986a7
patch link:    https://lore.kernel.org/r/20230906115928.3749928-1-alpic%40google.com
patch subject: [PATCH V2] SELinux: Check correct permissions for FS_IOC32_*
config: i386-debian-10.3 (https://download.01.org/0day-ci/archive/20230909/202309090600.NSyo7d2q-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230909/202309090600.NSyo7d2q-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309090600.NSyo7d2q-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   security/selinux/hooks.c: In function 'selinux_file_ioctl':
>> security/selinux/hooks.c:3647:9: error: duplicate case value
    3647 |         case FS_IOC32_GETFLAGS:
         |         ^~~~
   security/selinux/hooks.c:3645:9: note: previously used here
    3645 |         case FS_IOC_GETFLAGS:
         |         ^~~~
   security/selinux/hooks.c:3648:9: error: duplicate case value
    3648 |         case FS_IOC32_GETVERSION:
         |         ^~~~
   security/selinux/hooks.c:3646:9: note: previously used here
    3646 |         case FS_IOC_GETVERSION:
         |         ^~~~
   security/selinux/hooks.c:3654:9: error: duplicate case value
    3654 |         case FS_IOC32_SETFLAGS:
         |         ^~~~
   security/selinux/hooks.c:3652:9: note: previously used here
    3652 |         case FS_IOC_SETFLAGS:
         |         ^~~~
   security/selinux/hooks.c:3655:9: error: duplicate case value
    3655 |         case FS_IOC32_SETVERSION:
         |         ^~~~
   security/selinux/hooks.c:3653:9: note: previously used here
    3653 |         case FS_IOC_SETVERSION:
         |         ^~~~


vim +3647 security/selinux/hooks.c

  3634	
  3635	static int selinux_file_ioctl(struct file *file, unsigned int cmd,
  3636				      unsigned long arg)
  3637	{
  3638		const struct cred *cred = current_cred();
  3639		int error = 0;
  3640	
  3641		switch (cmd) {
  3642		case FIONREAD:
  3643		case FIBMAP:
  3644		case FIGETBSZ:
  3645		case FS_IOC_GETFLAGS:
  3646		case FS_IOC_GETVERSION:
> 3647		case FS_IOC32_GETFLAGS:
  3648		case FS_IOC32_GETVERSION:
  3649			error = file_has_perm(cred, file, FILE__GETATTR);
  3650			break;
  3651	
  3652		case FS_IOC_SETFLAGS:
  3653		case FS_IOC_SETVERSION:
  3654		case FS_IOC32_SETFLAGS:
  3655		case FS_IOC32_SETVERSION:
  3656			error = file_has_perm(cred, file, FILE__SETATTR);
  3657			break;
  3658	
  3659		/* sys_ioctl() checks */
  3660		case FIONBIO:
  3661		case FIOASYNC:
  3662			error = file_has_perm(cred, file, 0);
  3663			break;
  3664	
  3665		case KDSKBENT:
  3666		case KDSKBSENT:
  3667			error = cred_has_capability(cred, CAP_SYS_TTY_CONFIG,
  3668						    CAP_OPT_NONE, true);
  3669			break;
  3670	
  3671		case FIOCLEX:
  3672		case FIONCLEX:
  3673			if (!selinux_policycap_ioctl_skip_cloexec())
  3674				error = ioctl_has_perm(cred, file, FILE__IOCTL, (u16) cmd);
  3675			break;
  3676	
  3677		/* default case assumes that the command will go
  3678		 * to the file's ioctl() function.
  3679		 */
  3680		default:
  3681			error = ioctl_has_perm(cred, file, FILE__IOCTL, (u16) cmd);
  3682		}
  3683		return error;
  3684	}
  3685	

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