[PATCH] [natty] packaging: make System.map mode 0600

[Tim Gardner]

On 01/14/2011 02:24 PM, Kees Cook wrote:
> To complement the 0400 /proc/kallsyms patch, this makes the installed
> System.map file mode 0600 so that security vulnerability exploitation
> isn't as trivial. This, like kallsyms, does not stop a serious attacker,
> since they can always just fetch the package and read the file.
>
> I'm not aware of any non-root consumer of this file, so there should be
> no impact. FWIW, my system boots fine with this change.
>
> Signed-off-by: Kees Cook<kees.cook at canonical.com>
> ---
>   debian/rules.d/2-binary-arch.mk |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/debian/rules.d/2-binary-arch.mk b/debian/rules.d/2-binary-arch.mk
> index 5627af5..c289d11 100644
> --- a/debian/rules.d/2-binary-arch.mk
> +++ b/debian/rules.d/2-binary-arch.mk
> @@ -67,7 +67,7 @@ endif
>   		$(pkgdir)/boot/config-$(abi_release)-$*
>   	install -m644 $(abidir)/$* \
>   		$(pkgdir)/boot/abi-$(abi_release)-$*
> -	install -m644 $(builddir)/build-$*/System.map \
> +	install -m600 $(builddir)/build-$*/System.map \
>   		$(pkgdir)/boot/System.map-$(abi_release)-$*
>   ifeq ($(no_dumpfile),)
>   	makedumpfile -g $(pkgdir)/boot/vmcoreinfo-$(abi_release)-$* \

applied

-- 
Tim Gardner tim.gardner at canonical.com