static void hash_key(struct crypto_tfm *tfm, u8 *key, unsigned int keylen){	struct scatterlist tmp;		tmp.page = virt_to_page(key);	tmp.offset = offset_in_page(key);	tmp.length = keylen;	crypto_digest_digest(tfm, &tmp, 1, key);		}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/378f058cc49bcda7fa63d3cd86d2f9a0a5188b1c/hmac.c/buggy/crypto/hmac.c