1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4c52907a6d8b..43e1c6a9683e 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -849,5 +849,7 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
          /* 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) +                               \
          (perms))
 #endif