On Tue, Feb 15, 2022 at 08:39:39PM +0100, Michal Suchanek wrote:
> commit 278311e417be ("kexec, KEYS: Make use of platform keyring for signature verify")
> adds platform keyring support on x86 kexec but not arm64.
>
> Add platform keyring support on arm64 as well.
>
> Fixes: 278311e417be ("kexec, KEYS: Make use of platform keyring for signature verify")
> Cc: kexec@xxxxxxxxxxxxxxxxxxx
> Cc: keyrings@xxxxxxxxxxxxxxx
> Cc: linux-security-module@xxxxxxxxxxxxxxx
> Cc: stable@xxxxxxxxxx
> Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
Reviewed-by: "Lee, Chun-Yi" <jlee@xxxxxxxx>
> ---
> arch/arm64/kernel/kexec_image.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm64/kernel/kexec_image.c b/arch/arm64/kernel/kexec_image.c
> index 1fbf2ee7c005..3dee7b2d8336 100644
> --- a/arch/arm64/kernel/kexec_image.c
> +++ b/arch/arm64/kernel/kexec_image.c
> @@ -133,9 +133,17 @@ static void *image_load(struct kimage *image,
> #ifdef CONFIG_KEXEC_IMAGE_VERIFY_SIG
> static int image_verify_sig(const char *kernel, unsigned long kernel_len)
> {
> - return verify_pefile_signature(kernel, kernel_len,
> - VERIFY_USE_SECONDARY_KEYRING,
> - VERIFYING_KEXEC_PE_SIGNATURE);
> + int ret;
> +
> + ret = verify_pefile_signature(kernel, kernel_len,
> + VERIFY_USE_SECONDARY_KEYRING,
> + VERIFYING_KEXEC_PE_SIGNATURE);
> + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) {
> + ret = verify_pefile_signature(kernel, kernel_len,
> + VERIFY_USE_PLATFORM_KEYRING,
> + VERIFYING_KEXEC_PE_SIGNATURE);
> + }
> + return ret;
> }
> #endif
>
> --
> 2.31.1
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