crypto: algif_hash - fix double free in hash_accept

jira VULN-70977
jira VULN-70976
cve CVE-2025-38079
commit-author Ivan Pravdin <ipravdin.official@gmail.com>
commit b2df03e

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: fe869cd ("crypto: algif_hash - User-space interface for hash operations")
	Cc: <stable@vger.kernel.org>
	Signed-off-by: Ivan Pravdin <ipravdin.official@gmail.com>
	Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit b2df03e)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

crypto/algif_hash.c

@@ -267,10 +267,6 @@ static int hash_accept(struct socket *sock, struct socket *newsock, int flags,
 		return err;
 
 	err = crypto_ahash_import(&ctx2->req, state);
-	if (err) {
-		sock_orphan(sk2);
-		sock_put(sk2);
-	}
 
 	return err;
 }