Re: [RFC PATCH v1 05/11] landlock: Enforce namespace entry restrictions

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

Hi Mickaël,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on 5dfb8077be2bbe2c3b9477da759e80fa9f98da42]

url:    https://github.com/intel-lab-lkp/linux/commits/Micka-l-Sala-n/security-add-LSM-blob-and-hooks-for-namespaces/20260314-205540
base:   5dfb8077be2bbe2c3b9477da759e80fa9f98da42
patch link:    https://lore.kernel.org/r/20260312100444.2609563-6-mic%40digikod.net
patch subject: [RFC PATCH v1 05/11] landlock: Enforce namespace entry restrictions
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20260329/202603292125.BD9fYQyL-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260329/202603292125.BD9fYQyL-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/202603292125.BD9fYQyL-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/bits.h:30,
                    from security/landlock/setup.c:9:
>> include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct perm_rules) == sizeof(u64)"
      78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
         |                                         ^~~~~~~~~~~~~~
   include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert'
      77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
         |                                  ^~~~~~~~~~~~~~~
   security/landlock/access.h:86:1: note: in expansion of macro 'static_assert'
      86 | static_assert(sizeof(struct perm_rules) == sizeof(u64));
         | ^~~~~~~~~~~~~


vim +78 include/linux/build_bug.h

bc6245e5efd70c4 Ian Abbott       2017-07-10  60  
6bab69c65013bed Rasmus Villemoes 2019-03-07  61  /**
6bab69c65013bed Rasmus Villemoes 2019-03-07  62   * static_assert - check integer constant expression at build time
6bab69c65013bed Rasmus Villemoes 2019-03-07  63   *
6bab69c65013bed Rasmus Villemoes 2019-03-07  64   * static_assert() is a wrapper for the C11 _Static_assert, with a
6bab69c65013bed Rasmus Villemoes 2019-03-07  65   * little macro magic to make the message optional (defaulting to the
6bab69c65013bed Rasmus Villemoes 2019-03-07  66   * stringification of the tested expression).
6bab69c65013bed Rasmus Villemoes 2019-03-07  67   *
6bab69c65013bed Rasmus Villemoes 2019-03-07  68   * Contrary to BUILD_BUG_ON(), static_assert() can be used at global
6bab69c65013bed Rasmus Villemoes 2019-03-07  69   * scope, but requires the expression to be an integer constant
6bab69c65013bed Rasmus Villemoes 2019-03-07  70   * expression (i.e., it is not enough that __builtin_constant_p() is
6bab69c65013bed Rasmus Villemoes 2019-03-07  71   * true for expr).
6bab69c65013bed Rasmus Villemoes 2019-03-07  72   *
6bab69c65013bed Rasmus Villemoes 2019-03-07  73   * Also note that BUILD_BUG_ON() fails the build if the condition is
6bab69c65013bed Rasmus Villemoes 2019-03-07  74   * true, while static_assert() fails the build if the expression is
6bab69c65013bed Rasmus Villemoes 2019-03-07  75   * false.
6bab69c65013bed Rasmus Villemoes 2019-03-07  76   */
6bab69c65013bed Rasmus Villemoes 2019-03-07  77  #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
6bab69c65013bed Rasmus Villemoes 2019-03-07 @78  #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
6bab69c65013bed Rasmus Villemoes 2019-03-07  79  
07a368b3f55a79d Maxim Levitsky   2022-10-25  80  

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