linux-kernel - [PATCH AUTOSEL 6.6 171/294] crypto: skcipher - Zap type in crypto_alloc_sync

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Message-Id: <20250505225634.2688578-171-sashal@kernel.org>
Date: Mon,  5 May 2025 18:54:31 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Herbert Xu <herbert@...dor.apana.org.au>,
	Sasha Levin <sashal@...nel.org>,
	davem@...emloft.net,
	linux-crypto@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 171/294] crypto: skcipher - Zap type in crypto_alloc_sync_skcipher

From: Herbert Xu <herbert@...dor.apana.org.au>

[ Upstream commit ee509efc74ddbc59bb5d6fd6e050f9ef25f74bff ]

The type needs to be zeroed as otherwise the user could use it to
allocate an asynchronous sync skcipher.

Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 crypto/skcipher.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crypto/skcipher.c b/crypto/skcipher.c
index 7b275716cf4e3..acc879ed6031a 100644
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -811,6 +811,7 @@ struct crypto_sync_skcipher *crypto_alloc_sync_skcipher(
 
 	/* Only sync algorithms allowed. */
 	mask |= CRYPTO_ALG_ASYNC | CRYPTO_ALG_SKCIPHER_REQSIZE_LARGE;
+	type &= ~(CRYPTO_ALG_ASYNC | CRYPTO_ALG_SKCIPHER_REQSIZE_LARGE);
 
 	tfm = crypto_alloc_tfm(alg_name, &crypto_skcipher_type, type, mask);
 
-- 
2.39.5