linux-kernel - [BUG 0/2] crypto: ahash - Bugs introduced due to CRYPTO_AHASH_ALG_BLOCK

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Message-ID: <20251113140634.1559529-1-t-pratham@ti.com>
Date: Thu, 13 Nov 2025 19:30:11 +0530
From: T Pratham <t-pratham@...com>
To: <t-pratham@...com>, Herbert Xu <herbert@...dor.apana.org.au>, "David S.
 Miller" <davem@...emloft.net>
CC: <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Manorit
 Chawdhry" <m-chawdhry@...com>, Shiva Tripathi <s-tripathi1@...com>
Subject: [BUG 0/2] crypto: ahash - Bugs introduced due to CRYPTO_AHASH_ALG_BLOCK_ONLY

Hi,

Commit 9d7a0ab1c7536 ("crypto: ahash - Handle partial blocks in API")
introduced partial block handling for ahashes in the crypto API layer itself.
This enables ahash algorithms to return a positive integer from the update
function to indicate the number of bytes in the input which are not processed
and should be buffered for next update/finup/final call to process.

I've discovered 2 bugs introduced due to the above commit:

[Bug 1/2]: import/export fails for algs using CRYPTO_AHASH_ALG_BLOCK_ONLY
[BUG 2/2]: testmgr false failures with CRYPTO_AHASH_ALG_BLOCK_ONLY

These are detailed in the following messages.
-- 
Regards
T Pratham <t-pratham@...com>