| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20070824145649.18124.33973.stgit@americanbeauty.home.lan>
Date: Fri, 24 Aug 2007 16:56:49 +0200
From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
Subject: [PATCH] Script to check for undefined Kconfig symbols - v2
In this version, I've updated the scripts to search for "\<$symb_bare\>" instead
of $symb_bare in Kconfig files. Please ignore my previous message.
To avoid to look manually for used but undefined Kconfig variables, I've
written a script which tries do this efficiently, in case all other attention
fail. It accounts for _MODULE suffix and for UML_ prefixes to Kconfig variable,
but otherwise looks for exact matches (i.e. \<CONFIG_; this is done to exclude
macros like MMCONFIG_).
Undefined Kconfig variables should be not be removed without care, but for
instance arch/i386/boot/ uses a bunch of undefined Kconfig vars:
$ scripts/checkunknowndefines.sh arch/i386/boot/
arch/i386/boot/video.h uses undefined symbol VIDEO_400_HACK
arch/i386/boot/video-vga.c uses undefined symbol VIDEO_400_HACK
arch/i386/boot/video.c uses undefined symbol VIDEO_RETAIN
arch/i386/boot/video.h uses undefined symbol VIDEO_RETAIN
arch/i386/boot/video.h uses undefined symbol VIDEO_SVGA
arch/i386/boot/video.h uses undefined symbol VIDEO_VESA
arch/i386/boot/video-vesa.c uses undefined symbol VIDEO_VESA
Hope you can merge this in -mm and use it frequently (probably, a script to look for
regressions in its output is useful). It should also be mentioned in
SubmittingPatches if you agree.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
---
scripts/checkunknowndefines.sh | 59 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 59 insertions(+), 0 deletions(-)
diff --git a/scripts/checkunknowndefines.sh b/scripts/checkunknowndefines.sh
new file mode 100755
index 0000000..dbb5cef
--- /dev/null
+++ b/scripts/checkunknowndefines.sh
@@ -0,0 +1,59 @@
+#!/bin/sh
+# Find Kconfig variables used in source code but never defined in Kconfig
+# Copyright (C) 2007, Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
+
+# Tested with dash.
+paths="$@"
+[ -z "$paths" ] && paths=.
+
+# Doing this once at the beginning saves a lot of time, on a cache-hot tree.
+Kconfigs="`find . -name 'Kconfig' -o -name 'Kconfig*[^~]'`"
+
+echo "File list \tundefined symbol used"
+find $paths -name '*.[chS]' -o -name 'Makefile' -o -name 'Makefile*[^~]'| while read i
+do
+ # Output the bare Kconfig variable and the filename; the _MODULE part at
+ # the end is not removed here (would need perl an not-hungry regexp for that).
+ sed -ne 's!^.*\<\(UML_\)\?CONFIG_\([0-9A-Z_]\+\).*!\2 '$i'!p' < $i
+done | \
+# Smart "sort|uniq" implemented in awk and tuned to collect the names of all
+# files which use a given symbol
+awk '{map[$1, count[$1]++] = $2; }
+END {
+ for (combIdx in map) {
+ split(combIdx, separate, SUBSEP);
+ # The value may have been removed.
+ if (! ( (separate[1], separate[2]) in map ) )
+ continue;
+ symb=separate[1];
+ printf "%s ", symb;
+ #Use gawk extension to delete the names vector
+ delete names;
+ #Portably delete the names vector
+ #split("", names);
+ for (i=0; i < count[symb]; i++) {
+ names[map[symb, i]] = 1;
+ # Unfortunately, we may still encounter symb, i in the
+ # outside iteration.
+ delete map[symb, i];
+ }
+ i=0;
+ for (name in names) {
+ if (i > 0)
+ printf ", %s", name;
+ else
+ printf "%s", name;
+ i++;
+ }
+ printf "\n";
+ }
+}' |
+while read symb files; do
+ # Remove the _MODULE suffix when checking the variable name. This should
+ # be done only on tristate symbols, actually, but Kconfig parsing is
+ # beyond the purpose of this script.
+ symb_bare=`echo $symb | sed -e 's/_MODULE//'`
+ if ! grep -q "\<$symb_bare\>" $Kconfigs; then
+ echo "$files: \t$symb"
+ fi
+done|sort
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists