Re: [PATCH] x509: select CONFIG_CRYPTO_LIB_SHA256

On Thu, Feb 12, 2026 at 11:20:55AM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <[email protected]>
> 
> The x509 public key code gained a dependency on the sha256 hash
> implementation, causing a rare link time failure in randconfig
> builds:
> 
> arm-linux-gnueabi-ld: crypto/asymmetric_keys/x509_public_key.o: in function `x509_get_sig_params':
> x509_public_key.c:(.text.x509_get_sig_params+0x12): undefined reference to `sha256'
> arm-linux-gnueabi-ld: (sha256): Unknown destination type (ARM/Thumb) in crypto/asymmetric_keys/x509_public_key.o
> x509_public_key.c:(.text.x509_get_sig_params+0x12): dangerous relocation: unsupported relocation
> 
> Select the necessary library code from Kconfig.
> 
> Fixes: 2c62068ac86b ("x509: Separately calculate sha256 for blacklist")
> Signed-off-by: Arnd Bergmann <[email protected]>
> ---
>  crypto/asymmetric_keys/Kconfig | 1 +
>  1 file changed, 1 insertion(+)

Reviewed-by: Eric Biggers <[email protected]>

- Eric