Re: [PATCH 2/2] landlock: add support for private bind mount

kernel test robot
2024-12-31T21:03:46Z

Hi Shervin,

kernel test robot noticed the following build errors:

[auto build test ERROR on fc033cf25e612e840e545f8d5ad2edd6ba613ed5]

url: https://github.com/intel-lab-lkp/linux/commits/Shervin-Oloumi/landlock-add-support-for-private-bind-mount/20241231-094806
base: fc033cf25e612e840e545f8d5ad2edd6ba613ed5
patch link: https://lore.kernel.org/r/20241231014632.589049-2-enlightened%40chromium.org
patch subject: [PATCH 2/2] landlock: add support for private bind mount
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20250101/202501010450.vIVxrod1-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250101/202501010450.vIVxrod1-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/202501010450.vIVxrod1-lkp@intel.com/

All errors (new ones prefixed by >>):

In file included from include/linux/init.h:5,
from security/landlock/setup.c:9:
>> include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(typeof_member(union access_masks_all, masks)) == sizeof(typeof_member(union access_masks_all, all))"
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/ruleset.h:57:1: note: in expansion of macro 'static_assert'
57 | static_assert(sizeof(typeof_member(union access_masks_all, masks)) ==
| ^~~~~~~~~~~~~

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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