checkpatch: check for world-writeable sysfs/debugfs files
Exporting world writable sysfs/debugfs files is usually a bad thing. Warn
about it.
Signed-off-by: Dave Jones <davej@redhat.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index ddd27d8..fd9560e 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2897,6 +2897,11 @@
ERROR("lockdep_no_validate class is reserved for device->mutex.\n" . $herecurr);
}
}
+
+ if ($line =~ /debugfs_create_file.*S_IWUGO/ ||
+ $line =~ /DEVICE_ATTR.*S_IWUGO/ ) {
+ WARN("Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
+ }
}
# If we have no input at all, then there is nothing to report on