linux-kernel - Re: [4.8-rc1] make bindeb-pkg O= fails

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Date:	Sun, 14 Aug 2016 12:46:11 -0700
From:	Kees Cook <keescook@...omium.org>
To:	Christian Kujau <lists@...dbynature.de>
Cc:	Emese Revfy <re.emese@...il.com>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Michal Marek <mmarek@...e.com>
Subject: Re: [4.8-rc1] make bindeb-pkg O= fails

On Sun, Aug 14, 2016 at 11:53 AM, Christian Kujau <lists@...dbynature.de> wrote:
> [CC'ing Michal, Kees]
>
> On Tue, 9 Aug 2016, Christian Kujau wrote:
>> On Mon, 8 Aug 2016, frank paulsen wrote:
>> > in 4.8-rc1 "make bindeb-pkg O=../debian" fails:
>> > | find: `scripts/gcc-plugins': No such file or directory
>> > | /usr/src/linus/scripts/package/Makefile:97: recipe for target
>> > 'bindeb-pkg' failed
>> >
>> > this is due to a missing directory scripts/gcc-plugins if using O=
>> >
>> > removing line 335 of scripts/package/builddeb helps:
>> > | (cd $objtree; find scripts/gcc-plugins -name \*.so -o -name
>> > gcc-common.h) >> "$objtree/debian/hdrobjfiles"
>> >
>> > this clearly isn't the right fix, but i checked it anyway and the
>> > paket gets built.
>>
>> This was introduced in 6b90bd4ba40b38dc13c2782469c1c77e4ed79915 ("GCC
>> plugin infrastructure"). Not failing hard when scripts/gcc-plugins
>> cannot be found, does the trick as well. But that too just papers over
>> the issue. Hopefully Emese has a better idea on how to solve this :-)

(Sorry for white-space damaging...)

Does this fix it?

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index e1c09e2f9be7..8ea9fd2b6573 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -332,7 +332,9 @@ if grep -q '^CONFIG_STACK_VALIDATION=y'
$KCONFIG_CONFIG ; then
        (cd $objtree; find tools/objtool -type f -executable) >>
"$objtree/debian/hdrobjfiles"
 fi
 (cd $objtree; find arch/$SRCARCH/include Module.symvers include
scripts -type f) >> "$objtree/debian/hdrobjfiles"
-(cd $objtree; find scripts/gcc-plugins -name \*.so -o -name
gcc-common.h) >> "$objtree/debian/hdrobjfiles"
+if grep -q '^CONFIG_GCC_PLUGINS=y' $KCONFIG_CONFIG ; then
+       (cd $objtree; find scripts/gcc-plugins -name \*.so -o -name
gcc-common.h) >> "$objtree/debian/hdrobjfiles"
+fi
 destdir=$kernel_headers_dir/usr/src/linux-headers-$version
 mkdir -p "$destdir"
 (cd $srctree; tar -c -f - -T -) < "$objtree/debian/hdrsrcfiles" | (cd
$destdir; tar -xf -)

(i.e. only attempt the find when CONFIG_GCC_PLUGINS has been selected
in the .config)

-Kees

>
> Emese, do you have a better approach here?
>
> Thanks,
> Christian.
>
>>
>> diff --git a/scripts/package/builddeb b/scripts/package/builddeb
>> index e1c09e2..89757f6 100755
>> --- a/scripts/package/builddeb
>> +++ b/scripts/package/builddeb
>> @@ -332,7 +332,7 @@ if grep -q '^CONFIG_STACK_VALIDATION=y'
>> $KCONFIG_CONFIG ; then
>>       (cd $objtree; find tools/objtool -type f -executable) >>
>> "$objtree/debian/hdrobjfiles"
>>  fi
>>  (cd $objtree; find arch/$SRCARCH/include Module.symvers include scripts
>> -type f) >> "$objtree/debian/hdrobjfiles"
>> -(cd $objtree; find scripts/gcc-plugins -name \*.so -o -name
>> gcc-common.h) >> "$objtree/debian/hdrobjfiles"
>> +(cd $objtree; find scripts/gcc-plugins -name \*.so -o -name
>> gcc-common.h) >> "$objtree/debian/hdrobjfiles" || true
>>  destdir=$kernel_headers_dir/usr/src/linux-headers-$version
>>  mkdir -p "$destdir"
>>  (cd $srctree; tar -c -f - -T -) < "$objtree/debian/hdrsrcfiles" | (cd
>> $destdir; tar -xf -)
>>
>>
>> Thanks,
>> Christian.
> --
> BOFH excuse #382:
>
> Someone was smoking in the computer room and set off the halon systems.



-- 
Kees Cook
Nexus Security