linux-hardening - Re: [PATCH] sparc: Add missing "FORCE" target when using if

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Message-ID: <CAK7LNASWgdULqBJMQMkoy=mXtAj_xxcYXXXi0wYojMkWW4ktGA@mail.gmail.com>
Date:   Wed, 6 Oct 2021 21:53:18 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Nicolas Schier <n.schier@....de>,
        sparclinux <sparclinux@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH] sparc: Add missing "FORCE" target when using if_changed

On Wed, Oct 6, 2021 at 1:45 PM Kees Cook <keescook@...omium.org> wrote:
>
> On Fri, Sep 24, 2021 at 06:38:56AM +0200, Nicolas Schier wrote:
> > On Thu, Sep 23, 2021 at 02:54:18PM -0700, Kees Cook wrote:
> > > Fix observed warning:
> > >
> > >     /builds/linux/arch/sparc/boot/Makefile:35: FORCE prerequisite is missing
> > >
> > > Fixes: e1f86d7b4b2a5213 ("kbuild: warn if FORCE is missing for if_changed(_dep,_rule) and filechk")
> > > Cc: "David S. Miller" <davem@...emloft.net>
> > > Cc: Masahiro Yamada <masahiroy@...nel.org>
> > > Cc: sparclinux@...r.kernel.org
> > > Signed-off-by: Kees Cook <keescook@...omium.org>
> >
> > Acked-by: Nicolas Schier <n.schier@....de>
>
> Thanks!
>
> Masahiro, are you able to add this to your kbuild tree?

Sure, applied to linux-kbuild. Thanks.


> -Kees
>
> >
> > > ---
> > > I'm not sure if this should go via sparc or via kbuild. :)
> > > ---
> > >  arch/sparc/boot/Makefile | 8 ++++----
> > >  1 file changed, 4 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/arch/sparc/boot/Makefile b/arch/sparc/boot/Makefile
> > > index 849236d4eca4..45e5c76d449e 100644
> > > --- a/arch/sparc/boot/Makefile
> > > +++ b/arch/sparc/boot/Makefile
> > > @@ -22,7 +22,7 @@ ifeq ($(CONFIG_SPARC64),y)
> > >
> > >  # Actual linking
> > >
> > > -$(obj)/zImage: $(obj)/image
> > > +$(obj)/zImage: $(obj)/image FORCE
> > >     $(call if_changed,gzip)
> > >     @echo '  kernel: $@ is ready'
> > >
> > > @@ -31,7 +31,7 @@ $(obj)/vmlinux.aout: vmlinux FORCE
> > >     @echo '  kernel: $@ is ready'
> > >  else
> > >
> > > -$(obj)/zImage: $(obj)/image
> > > +$(obj)/zImage: $(obj)/image FORCE
> > >     $(call if_changed,strip)
> > >     @echo '  kernel: $@ is ready'
> > >
> > > @@ -44,7 +44,7 @@ OBJCOPYFLAGS_image.bin := -S -O binary -R .note -R .comment
> > >  $(obj)/image.bin: $(obj)/image FORCE
> > >     $(call if_changed,objcopy)
> > >
> > > -$(obj)/image.gz: $(obj)/image.bin
> > > +$(obj)/image.gz: $(obj)/image.bin FORCE
> > >     $(call if_changed,gzip)
> > >
> > >  UIMAGE_LOADADDR = $(CONFIG_UBOOT_LOAD_ADDR)
> > > @@ -56,7 +56,7 @@ quiet_cmd_uimage.o = UIMAGE.O $@
> > >                       -r -b binary $@ -o $@.o
> > >
> > >  targets += uImage
> > > -$(obj)/uImage: $(obj)/image.gz
> > > +$(obj)/uImage: $(obj)/image.gz FORCE
> > >     $(call if_changed,uimage)
> > >     $(call if_changed,uimage.o)
> > >     @echo '  Image $@ is ready'
> > > --
> > > 2.30.2
> > >
>
> --
> Kees Cook



-- 
Best Regards
Masahiro Yamada