linux-kernel - Re: [PATCH] crypto: algif_hash - fix double free in hash

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Message-ID: <aCrJ4ftEQ34opaa7@gondor.apana.org.au>
Date: Mon, 19 May 2025 14:04:17 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Ivan Pravdin <ipravdin.official@...il.com>
Cc: davem@...emloft.net, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] crypto: algif_hash - fix double free in hash_accept

On Sun, May 18, 2025 at 06:41:02PM -0400, Ivan Pravdin wrote:
> If accept(2) is called on socket type algif_hash with
> MSG_MORE flag set and crypto_ahash_import fails,
> sk2 is freed. However, it is also freed in af_alg_release,
> leading to slab-use-after-free error.
> 
> Fixes: fe869cdb89c9 ("crypto: algif_hash - User-space interface for hash operations")
> Signed-off-by: Ivan Pravdin <ipravdin.official@...il.com>
> ---
>  crypto/algif_hash.c | 4 ----
>  1 file changed, 4 deletions(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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