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-rw-r--r--include/linux/kernel.h18
1 files changed, 10 insertions, 8 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 5acf5b70866d..cfa9351c7536 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -813,13 +813,15 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
#endif
/* Permissions on a sysfs file: you didn't miss the 0 prefix did you? */
-#define VERIFY_OCTAL_PERMISSIONS(perms) \
- (BUILD_BUG_ON_ZERO((perms) < 0) + \
- BUILD_BUG_ON_ZERO((perms) > 0777) + \
- /* User perms >= group perms >= other perms */ \
- BUILD_BUG_ON_ZERO(((perms) >> 6) < (((perms) >> 3) & 7)) + \
- BUILD_BUG_ON_ZERO((((perms) >> 3) & 7) < ((perms) & 7)) + \
- /* Other writable? Generally considered a bad idea. */ \
- BUILD_BUG_ON_ZERO((perms) & 2) + \
+#define VERIFY_OCTAL_PERMISSIONS(perms) \
+ (BUILD_BUG_ON_ZERO((perms) < 0) + \
+ BUILD_BUG_ON_ZERO((perms) > 0777) + \
+ /* USER_READABLE >= GROUP_READABLE >= OTHER_READABLE */ \
+ BUILD_BUG_ON_ZERO((((perms) >> 6) & 4) < (((perms) >> 3) & 4)) + \
+ BUILD_BUG_ON_ZERO((((perms) >> 3) & 4) < ((perms) & 4)) + \
+ /* USER_WRITABLE >= GROUP_WRITABLE */ \
+ BUILD_BUG_ON_ZERO((((perms) >> 6) & 2) < (((perms) >> 3) & 2)) + \
+ /* OTHER_WRITABLE? Generally considered a bad idea. */ \
+ BUILD_BUG_ON_ZERO((perms) & 2) + \
(perms))
#endif