From 10396a2d6d41d594975b6ece712278570c3c970c Mon Sep 17 00:00:00 2001 From: Holger Dengler Date: Fri, 14 Aug 2026 16:20:10 +0200 Subject: [PATCH] crypto: s390/hmac - Generate intermediate CV for API partial block handling The API partial block handling requires a intermediate chaining value (CV). The internal function hash_data() sets the function code correctly, so also call cpacf_kimd() instruction for intermediate CV generation, as cpacf_klmd() always generate the final hash value. Cc: stable@vger.kernel.org # 6.15+ Fixes: 08811169ac01 ("crypto: s390/hmac - Use API partial block handling") Signed-off-by: Holger Dengler Reviewed-by: Harald Freudenberger Signed-off-by: Herbert Xu --- arch/s390/crypto/hmac_s390.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/s390/crypto/hmac_s390.c b/arch/s390/crypto/hmac_s390.c index f8cd09f341d4..445fa7bbd958 100644 --- a/arch/s390/crypto/hmac_s390.c +++ b/arch/s390/crypto/hmac_s390.c @@ -150,7 +150,10 @@ static int hash_data(const u8 *in, unsigned int inlen, #undef PARAM_INIT - cpacf_klmd(func, ¶m, in, inlen); + if (final) + cpacf_klmd(func, ¶m, in, inlen); + else + cpacf_kimd(func, ¶m, in, inlen); memcpy(digest, ¶m, digestsize);