[Buildroot] [PATCH 1/3] package/xen: explicitly disable checkpolicy logic

Alistair Francis alistair23 at gmail.com
Mon Jan 20 00:23:59 UTC 2020


On Mon, Jan 20, 2020 at 3:04 AM Peter Korsgaard <peter at korsgaard.com> wrote:
>
> Fixes:
> http://autobuild.buildroot.net/results/14af2dc3219847a92c6ec2db14ba387159b61fde
>
> The Xen build system builds and embeds a default XSM FLASK (Flux Advanced
> Security Kernel) security policy if it detects SELinux checkpolicy on the
> build machine.
>
> If enabled, a gen-policy.py python script is used to convert the binary
> FLASK policy to a C array initialization list to embed it in the Xen binary.
> Depending on the python version and locale available on the host, this fails
> with byte values outside the 0..255 range:
>
> policy.c:7:10: error: unsigned conversion from 'int' to 'unsigned char' changes value from '56575' to '255' [-Werror=overflow]
>   0xdc8c, 0xdcff, 0x7c, 0xdcf9, 0x08, 0x00, 0x00, 0x00, 0x58, 0x65, 0x6e, 0x46, 0x6c,
>
> To fix this and ensure a consistent build, pass XEN_HAS_CHECKPOLICY=n to
> disable the checkpolicy detection.
>
> Signed-off-by: Peter Korsgaard <peter at korsgaard.com>

Reviewed-by: Alistair Francis <alistair.francis at wdc.com>

Alistair

> ---
>  package/xen/xen.mk | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/package/xen/xen.mk b/package/xen/xen.mk
> index b0dc2dfe4c..167f0ad638 100644
> --- a/package/xen/xen.mk
> +++ b/package/xen/xen.mk
> @@ -26,6 +26,7 @@ XEN_MAKE_ENV = \
>         XEN_TARGET_ARCH=$(XEN_ARCH) \
>         CROSS_COMPILE=$(TARGET_CROSS) \
>         HOST_EXTRACFLAGS="-Wno-error" \
> +       XEN_HAS_CHECKPOLICY=n \
>         $(TARGET_CONFIGURE_OPTS)
>
>  ifeq ($(BR2_PACKAGE_XEN_HYPERVISOR),y)
> --
> 2.20.1
>
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