Re: [PATCH] Fix kexec forbidding kernels signed with custom platform keys to boot

[Linus Torvalds]

This needs more people involved, and at least a sign-off.

It looks ok, but I think we need a #define for the magical (void *)1UL
thing. I see the use in verify_pkcs7_signature(), but still.

              Linus



On Wed, Aug 15, 2018 at 3:11 AM Yannik Sembritzki <yannik@xxxxxxxxxxxxx> wrote:
>
> ---
>  arch/x86/kernel/kexec-bzimage64.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c
> index 7326078e..eaaa125d 100644
> --- a/arch/x86/kernel/kexec-bzimage64.c
> +++ b/arch/x86/kernel/kexec-bzimage64.c
> @@ -532,7 +532,7 @@ static int bzImage64_cleanup(void *loader_data)
>  static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len)
>  {
>         return verify_pefile_signature(kernel, kernel_len,
> -                                      NULL,
> +                                      (void *)1UL,
>                                        VERIFYING_KEXEC_PE_SIGNATURE);
>  }
>  #endif
> --
> 2.17.1
>
> The exact scenario under which this issue occurs is described here:
> https://bugzilla.redhat.com/show_bug.cgi?id=1554113
>